UA2-3NJ

Miniature Signal Relays **UA2/UB2 Series** 

## **Overview** 

## **Applications** 

The KEMET UA2/UB2 miniature signal relays offer a super compact case size in a slim package. Minimal board space is consumed with either a through-hole or surface mount configuration. These relays are recognized by UL and CSA, while also being compliant with Part 68 of the FCC’s 1,500 V surge capacity. 

- Electronic switching systems 

- PBX 

- Terminal equipment 

- Telephone systems 

## **Benefits** 

- Low power consumption (< 140 mW) 

- Super compact and lightweight 

- Slim package for dense mounting 

- Low magnetic interference 

- Tube or embossed tape and reel packaging 

- UL recognized (E73266) and CSA certified (LR46266) 

- Surface mount and through-hole options 

## **Part Number System** 

|**UB2-**|**3**|**S**|**NU**|**-L**|
|---|---|---|---|---|
|Series|Coil Voltage|Latch Type|Lead Type|Packaging|
|UA2- = Through-hole mount<br>UB2- = Surface mount|3 = 3 VDC<br>4.5 = 4.5 VDC<br>5 = 5 VDC<br>9 = 9 VDC<br>12 = 12 VDC<br>24 = 24 VDC|Blank = Non-latch type<br>S = Single coil latch type|NU = Standard<br>NJ = Trimmed<br>NE = Low power consumption (Non-latch)<br>NUN = Minimum footprint<br>NEN = Low power consumption (Non-latch),<br>Minimum footprint|Blank = Tube<br>-L = Embossed tape on reel|



**One world. One KEMET** 

© KEMET Electronics Corporation • P.O. Box 5928 • Greenville, SC 29606 (864) 963-6300 • www.kemet.com 

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Miniature Signal Relays – UA2/UB2 Series 

## **Dimensions – Millimeters** 

## **UA2 Series** 

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B Maximum<br>D Maximum<br>H Maximum<br>0.5<br>0.4 K 0.2<br>1.5 1.5<br>3.2 P P P<br>1 1 2<br>B Maximum<br>D Maximum<br>H Maximum<br>0.4 0.2<br>1.5 1.5 P<br>2<br>3.2 P P<br>1 1<br>P<br>3<br>**----- End of picture text -----**<br>


## **UB2 Series** 

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Series D H B P P P K<br>1 2 3<br>UA2 (NU, NE) 10.6 8.0 5.7 2.2 3.2 — 3.4<br>UA2 (NJ) 10.6 8.0 5.7 2.2 3.2 — 2.8<br>UB2 (NU, NE) 10.6 8.8 5.7 2.2 3.2 7.4 —<br>UB2 (NUN, NEN) 10.6 9.0 5.7 2.2 3.2 5.7 —<br>**----- End of picture text -----**<br>


_General tolerance: ±0.3 Tolerance of lead pitch: ±0.15_ 

© KEMET Electronics Corporation • P.O. Box 5928 • Greenville, SC 29606 (864) 963-6300 • www.kemet.com 

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Miniature Signal Relays – UA2/UB2 Series 

## **Pin Configurations** 

## **Bottom view** 

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**----- Start of picture text -----**<br>
Non-latch type Single coil latch type<br>(Non-energized position) (Reset position)<br>1      2    3    4 1      2    3    4<br>+  +  -<br>S R<br>- - +<br>8       7   6    5  8       7   6    5<br>S: Coil polarity for Set<br>R: Coil polarity for Reset<br>Direction mark Direction mark<br>**----- End of picture text -----**<br>


## **Safety Standards and Ratings** 

|**Certification Body**<br>~~Pr~~|**Certification Body**<br>~~Pr~~||**Mark**<br>**Specification**<br>~~ee~~|**Mark**<br>**Specification**<br>~~ee~~|**Mark**<br>**Specification**<br>~~ee~~|**File Number**|**Rating**|
|---|---|---|---|---|---|---|---|
||UL||TAL||UL Recognized<br>(UL508)1|E73266|30 VDC, 1 A (resistive)|
||CSA||@||CSA Certified<br>(CSA 22.2 #14)|LR46266|110 VDC, 0.3 A (resistive)<br>125 VAC, 0.5 A (resistive)|



_1 Spacing: UL840_ 

_2 Spacing: CSA std950_ 

|**Certification Body**<br>**Mark**<br>TUV<br>~~Pl~~|**Specification**<br>TUV Certified<br>(EN61810)|**File Number**<br>2050596|**Class**<br>Basic insulation|**Rating**<br>Creepage and clearance of coil to<br>contact is more than 2 mm<br>(Accordingto EN60950)|
|---|---|---|---|---|



## **Environmental Compliance** 

All KEMET relays are RoHS Compliant. 

© KEMET Electronics Corporation • P.O. Box 5928 • Greenville, SC 29606 (864) 963-6300 • www.kemet.com 

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Miniature Signal Relays – UA2/UB2 Series 

## **Table 1 – Ratings & Part Number Reference** 

|**Part Number**|**Nominal Coil Voltage**<br>**(VDC)**|**Lead Type**|**Packaging**|
|---|---|---|---|
|UA2-3(1)NU|3|Radial|Tube|
|UA2-4.5(1)NU|4.5|Radial|Tube|
|UA2-5(1)NU|5|Radial|Tube|
|UA2-9(1)NU|9|Radial|Tube|
|UA2-12(1)NU|12|Radial|Tube|
|UA2-24NU1|24|Radial|Tube|
|UA2-3NE1|3|Radial,Lowpower consumption|Tube|
|UA2-4.5NE1|4.5|Radial,Lowpower consumption|Tube|
|UA2-5NE1|5|Radial,Lowpower consumption|Tube|
|UA2-3(1)NJ|3|Trimmed Radial|Tube|
|UA2-4.5(1)NJ|4.5|Trimmed Radial|Tube|
|UA2-5(1)NJ|5|Trimmed Radial|Tube|
|UA2-9(1)NJ|9|Trimmed Radial|Tube|
|UA2-12(1)NJ|12|Trimmed Radial|Tube|
|UA2-24NJ1|24|Trimmed Radial|Tube|
|UB2-3(1)NU|3|Surface mount|Tube|
|UB2-4.5(1)NU|4.5|Surface mount|Tube|
|UB2-5(1)NU|5|Surface mount|Tube|
|UB2-9(1)NU|9|Surface mount|Tube|
|UB2-12(1)NU|12|Surface mount|Tube|
|UB2-24NU1|24|Surface mount|Tube|
|UB2-3NE1|3|Surface mount,Lowpower consumption|Tube|
|UB2-4.5NE1|4.5|Surface mount,Lowpower consumption|Tube|
|UB2-5NE1|5|Surface mount,Lowpower consumption|Tube|
|UB2-3(1)NU-L|3|Surface mount|Tape on Reel|
|UB2-4.5(1)NU-L|4.5|Surface mount|Tape on Reel|
|UB2-5(1)NU-L|5|Surface mount|Tape on Reel|
|UB2-9(1)NU-L|9|Surface mount|Tape on Reel|
|UB2-12(1)NU-L|12|Surface mount|Tape on Reel|
|UB2-24NU-L1|24|Surface mount|Tape on Reel|
|UB2-3NE-L1|3|Surface mount,Lowpower consumption|Tape on Reel|
|UB2-4.5NE-L1|4.5|Surface mount,Lowpower consumption|Tape on Reel|
|UB2-5NE-L1|5|Surface mount,Lowpower consumption|Tape on Reel|
|UB2-3(1)NUN|3|Surface mount,Minimum footprint|Tube|
|UB2-4.5(1)NUN|4.5|Surface mount,Minimum footprint|Tube|
|UB2-5(1)NUN|5|Surface mount,Minimum footprint|Tube|
|UB2-9(1)NUN|9|Surface mount,Minimum footprint|Tube|
|UB2-12(1)NUN|12|Surface mount,Minimum footprint|Tube|
|UB2-24NUN1|24|Surface mount,Minimum footprint|Tube|
|UB2-3NEN1|3|Surface mount,Lowpower consumption,Minimum Footprint|Tube|
|UB2-4.5NEN1|4.5|Surface mount,Lowpower consumption,Minimum Footprint|Tube|
|UB2-5NEN1|5|Surface mount,Lowpower consumption,Minimum Footprint|Tube|
|UB2-3(1)NUN-L|3|Surface mount,Minimum footprint|Tape on Reel|
|UB2-4.5(1)NUN-L|4.5|Surface mount,Minimum footprint|Tape on Reel|
|UB2-5(1)NUN-L|5|Surface mount,Minimum footprint|Tape on Reel|
|UB2-9(1)NUN-L|9|Surface mount,Minimum footprint|Tape on Reel|
|UB2-12(1)NUN-L|12|Surface mount,Minimum footprint|Tape on Reel|
|UB2-24NUN-L1|24|Surface mount,Minimum footprint|Tape on Reel|
|UB2-3NEN-L1|3|Surface mount,Lowpower consumption,Minimum Footprint|Tape on Reel|
|UB2-4.5NEN-L1|4.5|Surface mount,Lowpower consumption,Minimum Footprint|Tape on Reel|
|UB2-5NEN-L1|5|Surface mount,Lowpower consumption,Minimum Footprint|Tape on Reel|



_(1) To complete KEMET part number, leave blank for Non-latch or insert S for Single coil. Designates latch type._ 

_1 Only available as Non-latch._ 

© KEMET Electronics Corporation • P.O. Box 5928 • Greenville, SC 29606 (864) 963-6300 • www.kemet.com 

R7004_UA2_UB2 • 8/29/2013 

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**Roll Over for Order Info.** 

Miniature Signal Relays – UA2/UB2 Series 

## **Land Pattern – M** ~~**illime**~~ **ters** 

## **UA2 Series (bottom view)** 

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7.6<br>1.5 1.5<br>3.2 2.2 2.2<br>8 - ø 0.85<br>V<br>**----- End of picture text -----**<br>


## **UB2 Series (top view)** 

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7.6<br>1.5 1.5<br>3.2 2.2 2.2<br>V<br>X<br>1.11<br>**----- End of picture text -----**<br>


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Series V X<br>UA2 (NU, NJ, NE) 3.2 —<br>UB2  (NU , NE) 5.3 3.1<br>UB2 (NUN, NEN) 4.6 2.25<br>**----- End of picture text -----**<br>


© KEMET Electronics Corporation • P.O. Box 5928 • Greenville, SC 29606 (864) 963-6300 • www.kemet.com 

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Miniature Signal Relays – UA2/UB2 Series 

## **Soldering Process** 

## **UA2 – Through-hole Mounting** 

## Automatic Soldering 

   - Preheating: 110–120°C / 110 seconds (maximum) 

   - Solder temperature: 260°C maximum 

   - Solder time: 5 seconds maximum 

   - _Note: KEMET recommends cooling down a printed circuit board to less than 110°C within 40 seconds after soldering._ 

- Manual Soldering 

   - Solder temperature: 350°C maximum 

   - Solder time: 3 seconds maximum 

## **UB2 – Surface Mounting** 

## IRS Method 

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Temperature<br>(˚C) Maximum 240˚C<br>220<br>200<br>180<br>45 (Maximum 70) Time (seconds)<br>70 (Maximum 120)<br>190 (Maximum 300)<br>**----- End of picture text -----**<br>


## _Note:_ 

_Temperature profile shows printed circuit board surface temperature on the relay terminal portion. Please consult KEMET if you wish to use a temperature profile other than above._ 

© KEMET Electronics Corporation • P.O. Box 5928 • Greenville, SC 29606 (864) 963-6300 • www.kemet.com 

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Miniature Signal Relays – UA2/UB2 Series 

## **Contact Specifications** 

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Item UA2/UB2<br>**----- End of picture text -----**<br>


|**Item**|**Item**|**UA2/UB2**|
|---|---|---|
||||
|Contact Form||2 Form C|
|Contact Material||Silver alloy with gold alloy overlay|
|Contact Ratings|Maximum Switching Power|30 W, 37.5 VA|
||Maximum Switching Voltage|220 VDC, 250 VAC|
||Maximum Switching Current|1 A|
||Maximum Carrying Current|1 A|
|Minimum Contact Ratings||10 mVDC, 10 µA*1|
|Initial Contact Resistance||100 mΩ maximum (initial)|
|Operating Time (excluding bounce)||Approximately 2 milliseconds|
|Release Time (excluding bounce)||Approximately 1 milliseconds|
|Insulation Resistance||1,000 MΩ @ 500 VDC|
|Withstand Voltage|Between Open Contacts|1,000 VAC (for one minute), 1,500 V surge (10 x 160 µs)*2|
||Between Adjacent Contacts|1,000 VAC (for one minute), 1,500 V surge (10 x 160 µs)*2|
||Between Coil and Contacts|1,500 VAC (for one minute), 2,500 V surge (2 x 10 µs)*3|
|Shock Resistance||735 m/s2(75 G) – misoperation<br>980 m/s2(100 G) – destructive failure|
|Vibration Resistance||10 to 55 Hz, double amplitude 3 mm (20 G) – misoperation<br>10 to 55 Hz, double amplitude 5 mm (30 G) – destructive failure|
|Ambient Temperature||-40 to +85°C|
|Coil Temperature Rise||18°C at nominal coil voltage (140 mW)|
|Running Specifcations|Non-load|5 x 107operations (Non-latch type)*4<br>1 x 107operations (Latch type)|
||Load|30 VDC 1 A (resistive), 1 x 105operations @ 20°C, 1 Hz<br>125 VAC 0.3 A (resistive), 1 x 105operations @ 20°C, 1 Hz|
|Weight||Approximately 1 g|



_*1 This value is a reference value in the resistance load. Minimum capacity changes depending on the switching frequency, environment temperature, and load._ 

_*2 Rise time: 10 µs; decay time to half crest: 160 µs._ 

- _*3 Rise time: 2 µs; decay time to half crest: 10 µs._ 

- _*4 This shows the number of operations with fatal defects. Stable characteristics are maintained for 1 x 107 operations._ 

## **Coil Specifications** 

|**Non-latch Type (@ 20°C)**|**Non-latch Type (@ 20°C)**|**Non-latch Type (@ 20°C)**|**Non-latch Type (@ 20°C)**|**Non-latch Type (@ 20°C)**|
|---|---|---|---|---|
|**Nominal Coil Voltage**<br>**(VDC)**|**Coil Resistance**<br>**(Ω) ±10%**|**Operating Voltage1**<br>**(VDC)**|**Release Voltage1**<br>**(VDC)**|**Nominal Operating**<br>**Power(mW)**|
|3|64.3|2.25|0.3|140|
|4.5|145|3.38|0.45|140|
|5|178|3.75|0.5|140|
|9|579|6.75|0.9|140|
|12|1028|9.0|1.2|140|
|24|2504|18.0|2.4|230|



- _1 Test by pulse voltage._ 

© KEMET Electronics Corporation • P.O. Box 5928 • Greenville, SC 29606 (864) 963-6300 • www.kemet.com 

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Miniature Signal Relays – UA2/UB2 Series 

## **Coil Specifications cont’d** 

|**Single Coil Latch Type (@ 20°C)2**|**Single Coil Latch Type (@ 20°C)2**|**Single Coil Latch Type (@ 20°C)2**|**Single Coil Latch Type (@ 20°C)2**|**Single Coil Latch Type (@ 20°C)2**|
|---|---|---|---|---|
|**Nominal Coil Voltage**<br>**(VDC)**|**Coil Resistance**<br>**(Ω) ±10%**|**Set Voltage1**<br>**(VDC)**|**Reset Voltage1**<br>**(VDC)**|**Nominal Operating**<br>**Power (mW)**|
|3|90|2.25|2.25|100|
|4.5|202.5|3.38|3.38|100|
|5|250|3.75|3.75|100|
|9|810|6.75|6.75|100|
|12|1440|9.0|9.0|100|



_1 Test by pulse voltage._ 

_2 Latch type relays should be initialized to a known position before using. Only the specified polarity should be used to energize the coil._ 

|**Non-latch, Low Power Consumption (NE, NEN) Type (@ 20°C)**|**Non-latch, Low Power Consumption (NE, NEN) Type (@ 20°C)**|**Non-latch, Low Power Consumption (NE, NEN) Type (@ 20°C)**|**Non-latch, Low Power Consumption (NE, NEN) Type (@ 20°C)**|**Non-latch, Low Power Consumption (NE, NEN) Type (@ 20°C)**|
|---|---|---|---|---|
|**Nominal Coil Voltage**<br>**(VDC)**|**Coil Resistance**<br>**(Ω) ±10%**|**Operating Voltage1**<br>**(VDC)**|**Release Voltage1**<br>**(VDC)**|**Nominal Operating**<br>**Power (mW)**|
|3|90|2.25|0.3|100|
|4.5|202.5|3.38|0.45|100|
|5|250|3.75|0.5|100|



_1 Test by pulse voltage._ 

## **Recommended Relay Drive Conditions** 

|**Coil Type**|**Rating**|**Ambient Temperature**|
|---|---|---|
|Non-latch|Voltage: ≤ ±5% of nominal voltage|-40 to +85°C|
|Single Coil|Square pulse (rise and fall time is rapid)<br>Pulse height: ≤ ±5% of nominal voltage<br>Pulse Width: > 10 ms||



## **Marking** 

## **Top view** 

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Part number  Date code<br>Direction mark  0501F<br>(pin No. 1 and 8)  UB2-4.5NU<br>JAPAN<br>Manufacturer  Country of origin<br>**----- End of picture text -----**<br>


© KEMET Electronics Corporation • P.O. Box 5928 • Greenville, SC 29606 (864) 963-6300 • www.kemet.com 

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Miniature Signal Relays – UA2/UB2 Series 

## **Performance Data** 

## **Coil Temperature Rise** 

Temperature is measured by coil resistance 

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Coil temperature<br>60<br> Rise (°C )<br>40<br>20<br> 0<br> 0   100   200 300<br>Applied power (mW)<br>**----- End of picture text -----**<br>


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Coil temperature<br> Rise (°C)  Applied power 0.23W<br>30<br>20<br>Applied power 0.14W<br>10<br>Applied power 0.1W<br> 0<br> 0      5   10  15    20<br>Applied time (minute)<br>**----- End of picture text -----**<br>


## **Switching Capacity** 

## Maximum Values 

## **Maximum Coil Voltage** 

Maximum value of permissible alteration 

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2.0 DC(Resistive) 200<br> AC(Resistive)<br>Contact  1.0 Ratio  Ratio  of 150<br>current (A)  0.5 nomina nominal<br>coil  coil  100<br>voltage voltage<br>0.2 (%)   (%)    50<br>0.1<br> 10   20  50 100 -40  -20   0  20   40    60   80  100<br>250VAC VAC<br>Contact voltage (V) Ambient temperature (°C)<br>220VDC 0VDC<br>**----- End of picture text -----**<br>


**Applied Voltage vs. Timing** (Sample: UA2-5NU) 

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(Without coil diode)<br>4  4<br>3  3<br>Operate  2  Release  2<br>time  time<br>(ms)  1  (ms)  1<br>0  0<br> 0    100   150 200  250  0    100   200 300  400<br>Applied power (mW) Applied power (mW)<br>**----- End of picture text -----**<br>


© KEMET Electronics Corporation • P.O. Box 5928 • Greenville, SC 29606 (864) 963-6300 • www.kemet.com 

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Miniature Signal Relays – UA2/UB2 Series 

## **Performance Data cont’d** 

## **Operate and Release Voltage vs. Ambient Temperature** 

This shows a typical change of operate (release) voltage. The value of must operate is estimated, so coil voltage must be applied higher than this value for safe operation. For hot start operation, please inquire with KEMET. 

**==> picture [325 x 139] intentionally omitted <==**

**----- Start of picture text -----**<br>
100<br>Must operate voltage<br> 80  Operate voltage (typical)<br>Ratio of nominal<br> 60<br>coil voltage (%)<br> 40<br>Release voltage (typical)<br> 20<br>  0    -40      -20      0    20      40      60      80      100<br>Ambient temperature (°C)<br>**----- End of picture text -----**<br>


## **Running Test (Non-load)** 

(Load: none; Drive: 5 VDC, 50 Hz, 50% duty; Ambient Temperature: room temperature; Sample: UA2-5NU, 20 pieces) 

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10000<br>5<br>Contact  1000  Operate  4  Operate voltage<br>resistance  voltage  3<br>(mΩ)  (V)<br>100  2<br>Release<br>voltage  1  Release voltage<br>(V)<br>10  0<br>  0       20       50   100             500     1000    0       20    50    100            500     1000<br>Operations (×104) Operations (×104)<br>**----- End of picture text -----**<br>


## **Running Test (Load)** 

(Load: 50 VDC, 0.1 A resistive; Drive: 5 VDC, 5 Hz, 50% duty; Ambient Temperature: 85°C; Sample: UA2-5NU, 10 pieces) 

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**----- Start of picture text -----**<br>
10000  5<br>4 Operate voltage<br>Contact  1000  Operate  3<br>resistance  voltage<br>2<br>(mΩ)  (V)  Release voltage<br>100  Release  1<br>0<br> 0        2     5     10               50    100<br>10<br>  0       2        5     10              50     100    Operations (×104)<br>Operations (×104)<br>**----- End of picture text -----**<br>


© KEMET Electronics Corporation • P.O. Box 5928 • Greenville, SC 29606 (864) 963-6300 • www.kemet.com 

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Miniature Signal Relays – UA2/UB2 Series 

## **Performance Data cont’d** 

## **Breakdown Voltage** 

## (Sample: UA2-5NU, 10 pieces) 

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(a) Between open contacts (b) Between adjacent contacts<br>100 100<br>Distribution   50   50<br>Distribution (%)<br>  0    0<br>0.5 1.0 1.5 2.0 1.0 1.5 2.0  2.5<br>Breakdown voltage (K V) Breakdown voltage (K V)<br>(C) Between coil and contact<br>100<br>Distribution (%)  50<br>  0<br>1.5 2.0 2.5 2.5over<br>Breakdown voltage (K V)<br>**----- End of picture text -----**<br>


**Alteration of Voltage in Dense Mounting** (magnetic interference) 

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**----- Start of picture text -----**<br>
Alternation of operate voltage Alternation of operate voltage<br>+40 +40<br>+30 +30<br>+20 +20<br>+10 +10<br>Ratio of   0  Ratio of   0<br>alternation (%)  -10  alternation (%) -10<br>-20  -20<br>-30  -30<br>-40  -40<br> a      b      c      d      e        f a      b      c      d      e        f<br>Mounting layout Mounting layout<br>Device under test ON OFF<br>ON        ON OFF       OFF<br>3mm 2.5mm<br>ON OFF<br> a              b                  c           d<br>ON<br>OFF<br>ON<br>OFF<br>ON<br>OFF<br>e                        f<br>**----- End of picture text -----**<br>


© KEMET Electronics Corporation • P.O. Box 5928 • Greenville, SC 29606 (864) 963-6300 • www.kemet.com 

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Miniature Signal Relays – UA2/UB2 Series 

## **Tube Packing – Millimeters** 

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**----- Start of picture text -----**<br>
50 pieces / Tube (anti-static)<br>15.5<br>a a|_—___—S—F|a<br>10.1 560<br>— Direction of relay direction mark<br>Rubber stopper (Yellow) Rubber stopper (Green)<br>**----- End of picture text -----**<br>


## **Tape & Reel Packaging Information (UB2 only) – Millimeters** 

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Appearance<br>Reel 800 pieces / Reel<br>Vf Reel diameter: 380mm<br>Emboss<br>Carrying tape<br>C2.<br>a<br>Top cover tape<br>max. 8.1<br>Tape Dimensions A<br>2.0 1.75 0.4<br>Φ 1.5  1 26 4<br>Φ 2.2<br>11.5<br>14.711.4<br>24.0<br>\sleslese<br>12.1B<br>**----- End of picture text -----**<br>


|**Series**|**A**|**B**|
|---|---|---|
|NU-L,NE-L|Maximum 9.4|8.2|
|NUN-L, NEN-L|Maximum 9.5|6.7|



## **Relay Direction Mark and Tape Carrying Direction** 

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**----- Start of picture text -----**<br>
Sprocket hole<br>Direction mark<br>o<br>CO Direction of unreeling<br>**----- End of picture text -----**<br>


© KEMET Electronics Corporation • P.O. Box 5928 • Greenville, SC 29606 (864) 963-6300 • www.kemet.com 

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Miniature Signal Relays – UA2/UB2 Series 

## **Notes on Using Relays** 

## **1. Contact Load** 

Make sure that the contact load is within the specified range; otherwise, the lifetime of the contacts will be shortened considerably. Note that the running performance shown is an example, and that it varies depending on parameters such as the type of load, switching frequency, driver circuit, and ambient temperature under the actual operating conditions. 

## **2. Driving Relays** 

- If the internal connection diagram of a relay shows + and - symbols on the coil, apply the rated voltage to the relay in the specified direction. If a rippled DC current source is used, abnormalities such as heat at the coil may occur. 

- The maximum voltage that can be applied to the coil of the relay varies depending on the ambient temperature. Generally, the higher the voltage applied to the coil, the shorter the operating time. Note, however, that high voltage also increases the bounce of the contacts and the contact opening and closing frequency, which may shorten the lifetime of the contacts. 

- For consistent operation, the driving voltage should have rise and fall times of less than 1 ms. 

**==> picture [170 x 81] intentionally omitted <==**

**----- Start of picture text -----**<br>
Nominal<br>coil voltage<br>0<br><1msec. <1msec.<br>**----- End of picture text -----**<br>


- For a latching relay, apply a voltage to the coil according to the polarity specified in the internal connection diagram of the relay. 

- If a current is applied to the coil over a long period of time, the coil temperature rises, promoting generation of organic gas inside the relay, which may result in faulty contacts. In this case, use of a latching relay is recommended. 

- The operating time and release time indicate the time required for each contact to close after the voltage has been applied to or removed from the coil. However, because the relay has a mechanical structure, a bounce state exists at the end of the operating and release times. Furthermore, because additional time is required until the contact stabilizes after being in a high-resistance state, care must be taken when using the relay at high speeds. 

## **3. Operating Environment** 

- Make sure that the relay mounted in the application set is used within the specified temperature range. Use of a relay at a temperature outside this range may adversely affect insulation or contact performance. 

- If the relay is used for a long period of time in highly humid (RH 85% or higher) environment, moisture may be absorbed into the relay. This moisture may react with the NOx and SOx generated by glow discharges that occur when the contacts are opened or closed, producing nitric or sulfuric acid. If this happens, the acid produced may corrode the metallic parts of the relay, causing operational malfunction. 

- If any material containing silicon (silicon rubber, silicon oil, and silicon based coating material) is used in the neighborhood of relay, there is some possibility that these materials will emit silicon gas that will penetrate the relay. In this case, the switching contact may generate silicon compounds on the surface of contacts. This silicon compound may result in contact failure. Avoid use of relay in such an environment. 

© KEMET Electronics Corporation • P.O. Box 5928 • Greenville, SC 29606 (864) 963-6300 • www.kemet.com 

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## **Notes on Using Relays cont’d** 

- Because the operating temperature range varies depending on the humidity, use the relay in the temperature range illustrated in the figure below. Prevent the relay from being frozen and avoid the generation of condensation. 

**==> picture [204 x 111] intentionally omitted <==**

**----- Start of picture text -----**<br>
85<br>80<br>60<br>Humidity<br> (%RH) 40<br>20<br>5<br>-60  -40  -20  0  20  40   60   80  100<br>Temperature (°C )<br>**----- End of picture text -----**<br>


- The relay maintains constant sealability under normal atmospheric pressure (810 to 1,200 hpa). Its sealability may be degraded or the relay may be deformed and malfunction if it is used under barometric conditions exceeding the specified range. 

- The same applies when the relay is stored or transported. Keep the upper-limit value of the temperature to which the relay is exposed after it is removed from the carton box to within 50°C. 

- Permanent magnets are used in polarized relays. For this reason, when magnets, transformers, or speakers are located nearby the relay characteristics may change and faulty operations may result. 

- If excessive vibration or shock is applied to the relay, it may malfunction and the contacts remain closed. Vibration or shock applied to the relay during operation may cause considerable damage to or wearing of the contacts. Note that operation of a snap switch mounted close to the relay or shock due to the operation of magnetic solenoid may also cause malfunctioning. 

## **4. Mounting** 

- When mounting a relay onto a PC board using an automatic chip mounter, if excessive force is applied to the cover of the relay when the relay is chucked or inserted, the cover may be damaged or the characteristics of the relay degraded. Keep the force applied to the relay to within 1 kg. 

- Avoid bending the pins to temporarily secure the relay to the PC board. Bending the pins may degrade sealability or adversely affect the internal mechanism. 

- Ventilation immediately after soldering is recommended. Avoid immersing the relay in cleaning solvent immediately after soldering due to the danger of thermal shock being applied to the relay. 

- Use an alcohol-based or water-based cleaning solvent. Never use thinner and benzene because they may damage the relay housing. 

- Do not use ultrasonic cleaning because the vibration energy generated by the ultrasonic waves may cause the contacts to remain closed. 

## **5. Handling and Storage** 

- Relays are packaged in magazine cases for shipment. If a space is created in the case after some relays have been removed, be sure to insert a stopper to secure the remaining relays in the case. If relays are not well secured, vibration during transportation may cause malfunctioning of the contacts. 

- Exercise care in handling the relay so as to avoid dropping it or allowing it to fall. Do not use a relay that has been dropped. If a relay drops from a workbench to the floor, a shock of 9,800 m/s[2] (1,000 G) or more is applied to the relay, possibly damaging its functions. Even if a light shock has been applied to the relay, thoroughly evaluate its operation before using it. 

© KEMET Electronics Corporation • P.O. Box 5928 • Greenville, SC 29606 (864) 963-6300 • www.kemet.com 

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Miniature Signal Relays – UA2/UB2 Series 

## **Notes on Using Relays cont’d** 

- Latching relays are factory-set to reset state for shipment. A latching relay may be set, however, by vibration or shock applied while being transported. Be sure to forcibly reset the relay before using it in the application set. Also note that the relay may be set by unexpected vibration or shock when it is used in a portable set. 

- The sealability of a surface mount (SMT) relay may be lost if the relay absorbs and is then heated during soldering. When storing relays, therefore, observe the following points: 

   1. For standard packing, please use relays within 12 months after delivery (storage conditions: 30°C / 60% RH). If the relays have moisture absorption, dehumidify as follows: 

      - Tape Packaging: 50 ±5°C, 200–300 hours. 

      - Simple Relay: 85 ±5°C, 48 hours. 

   2.  For MBB packing, please use relays within 2 years after delivery (storage conditions: 30°C / 60% RH). After opening MBB packing, please use within 3 months (storage conditions: 30°C / 60% RH). 

© KEMET Electronics Corporation • P.O. Box 5928 • Greenville, SC 29606 (864) 963-6300 • www.kemet.com 

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Miniature Signal Relays – UA2/UB2 Series 

## **KEMET Corporation World Headquarters** 

2835 KEMET Way Simpsonville, SC 29681 

## **Europe** 

**Southern Europe** Paris, France Tel: 33-1-4646-1006 

## **Asia** 

**Northeast Asia** Hong Kong Tel: 852-2305-1168 

Mailing Address: P.O. Box 5928 Greenville, SC 29606 

www.kemet.com Tel: 864-963-6300 Fax: 864-963-6521 

**Corporate Offi ces** Fort Lauderdale, FL Tel: 954-766-2800 

Sasso Marconi, Italy Tel: 39-051-939111 

**Central Europe** Landsberg, Germany Tel: 49-8191-3350800 

Kamen, Germany Tel: 49-2307-438110 

Shenzhen, China Tel: 86-755-2518-1306 

Beijing, China Tel: 86-10-5829-1711 Shanghai, China Tel: 86-21-6447-0707 

Taipei, Taiwan Tel: 886-2-27528585 

## **North America** 

## **Southeast** 

Lake Mary, FL Tel: 407-855-8886 

**Northeast** Wilmington, MA Tel: 978-658-1663 

**Northern Europe** Bishop’s Stortford, United Kingdom Tel: 44-1279-460122 Espoo, Finland Tel: 358-9-5406-5000 

**Southeast Asia** Singapore Tel: 65-6586-1900 

Penang, Malaysia Tel: 60-4-6430200 Bangalore, India Tel: 91-806-53-76817 

**Central** Novi, MI Tel: 248-994-1030 

## **West** 

Milpitas, CA Tel: 408-433-9950 

## **Mexico** 

Guadalajara, Jalisco Tel: 52-33-3123-2141 

_Note: KEMET reserves the right to modify minor details of internal and external construction at any time in the interest of product improvement. KEMET does not assume any responsibility for infringement that might result from the use of KEMET Capacitors in potential circuit designs. KEMET is a registered trademark of KEMET Electronics Corporation._ 

© KEMET Electronics Corporation • P.O. Box 5928 • Greenville, SC 29606 (864) 963-6300 • www.kemet.com 

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Miniature Signal Relays – UA2/UB2 Series 

## **Disclaimer** 

This product has been made available through a Private Label Agreement and a Development and Cross-Licensing Agreement between KEMET and NEC TOKIN to expand market and product offerings for both companies and their respective customers. For more information, please visit http://www.kemet.com/nectokin. 

All product specifi cations, statements, information and data (collectively, the “Information”) in this datasheet are subject to change. The customer is responsible for checking and verifying the extent to which the Information contained in this publication is applicable to an order at the time the order is placed. 

All Information given herein is believed to be accurate and reliable, but it is presented without guarantee, warranty, or responsibility of any kind, expressed or implied. 

Statements of suitability for certain applications are based on KEMET Electronics Corporation’s (“KEMET”) knowledge of typical operating conditions for such applications, but are not intended to constitute – and KEMET specifi cally disclaims – any warranty concerning suitability for a specifi c customer application or use. The Information is intended for use only by customers who have the requisite experience and capability to determine the correct products for their application. Any technical advice inferred from this Information or otherwise provided by KEMET with reference to the use of KEMET’s products is given gratis, and KEMET assumes no obligation or liability for the advice given or results obtained. 

Although KEMET designs and manufactures its products to the most stringent quality and safety standards, given the current state of the art, isolated component failures may still occur. Accordingly, customer applications which require a high degree of reliability or safety should employ suitable designs or other safeguards (such as installation of protective circuitry or redundancies) in order to ensure that the failure of an electrical component does not result in a risk of personal injury or property damage. 

Although all product–related warnings, cautions and notes must be observed, the customer should not assume that all safety measures are indicted or that other measures may not be required. 

## Digitally signed by Marcy Brand 

DN: c=US, st=FL, l=Fort Lauderdale, o=KEMET Corporation, ou=Marketing Communications, cn=Marcy Brand, email=marcybrand@kemet.com Date: 2013.08.30 10:14:23 -04'00' 

© KEMET Electronics Corporation • P.O. Box 5928 • Greenville, SC 29606 (864) 963-6300 • www.kemet.com 

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