RY2KS-UAC120V

## **RY2KS Series Latch Relays** 

## **Self-maintained Latch Relays DPDT — 3A contact capacity** 

The RY2KS series latch relays have a self-holding function using permanent magnets in the magnetic circuit. Applying a voltage on the set (or reset) coil operates the armature and retains the contacts in that position until the opposite coil is energized, hence the latch relays are ideal for memory and flip-flop circuit applications. 

- Mountable in the same space as other miniature relays using the same sockets. 

- Recognized by UL and certified by CSA. 

## **Types** 

|**Types**||||
|---|---|---|---|
|**Terminal**<br>**Style**|**Type**|**Type No.**|**Coil Voltage Code**<br>∗|
|Plug-in<br>Terminal|Basic|RY2KS-U<br>∗|AC6, AC12, AC24, AC50,<br>AC100, AC120<br>DC6, DC12, DC24, DC48,<br>DC100, DC110|
||With Check Button|RY2KS-UC<br>∗||



## **Ordering Information** 

When ordering, specify the Type No. and coil voltage code. 

(Example) **RY2KS-U AC120** 

Type No. Coil Voltage Code 

## **Coil Ratings** 

Operation Characteristics Rated Current (mA) ±15% at 20°C Coil Resistance ( Ω ) (against rated values at 20°C) Rated Voltage (V) ±10% at 20°C Maximum Continuous CF 50Hz 60Hz — |} Applied Voltage Set and Reset Voltage 6 260 250 6.3 12 120 115 30.3 24 58 ee 56 132 110% 80% ————— 50 27 26 606 maximum ~~=~~ 100 13.5 es 13 2,630 ~~==~~ a 120 11.2 eeeS 10.8 3,840 ~~a~~ 6 200 30 12 100 120 24 50 480 80% 110% — 48 25 1,920 maximum a 100 12 8,330 SS 110 a 11 10,000 

## **Contact Ratings** 

|**Contact Ratings**|**Contact Ratings**|**Contact Ratings**|**Contact Ratings**|**Contact Ratings**|**Contact Ratings**|**Contact Ratings**|
|---|---|---|---|---|---|---|
|Maximum Contact Capacity|||||||
|Switching<br>Voltage|Continuous<br>Current|Allowable Contact Power||Rated Load|||
|||Resistive<br>Load|Inductive<br>Load|Voltage|Res.<br>Load|Ind.<br>Load|
|250V AC<br>125V DC|3A|660VA AC<br>90W DC|176VA AC<br>45W DC|110V AC|3A|1.5A|
|||||220V AC|3A|0.8A|
|||||30V DC|3A|1.5|
|||||100V DC|0.2A|0.12A|



Note: Inductive load for rated load — cos ø = 0.3, L/R = 7 ms 

## **• UL Ratings** 

|**• UL Ratings**|||
|---|---|---|
|Voltage|Resistive|General Use|
|240V AC|3A|0.8A|
|120V AC|3A|1.5A|
|30V DC|3A|—|



## **• CSA Ratings** 

|Voltage|Resistive|General Use|
|---|---|---|
|240V AC|3A|0.8A|
|120V AC|3A|1.5A|
|100V DC|—|0.2A|
|30V DC|3A|1.5A|



## **Specifications** 

|**Specifications**||
|---|---|
|Contact Material|Gold-plated silver|
|Contact Resistance|50 mΩmaximum (initial value)|
|Set Time|25 ms maximum (at the rated voltage)|
|Reset Time|25 ms maximum (at the rated voltage)|
|Power Consumption<br>(approx.)|AC: 1.6 VA (50 Hz), 1.5 VA (60 Hz)<br>DC: 1.2W|
|Insulation Resistance|100 MΩminimum (500V DC megger)|
|Dielectric Strength|Between live and dead parts:<br>1,500V AC, 1 minute<br>Between contact and coil:<br>1,000V AC, 1 minute<br>Between contacts of different poles:<br>1,000V AC, 1 minute<br>Between contacts of the same pole:<br>700V AC, 1 minute|
|Operating Frequency|Electrical:<br>1800 operations/h maximum<br>Mechanical: 18,000 operations/h maximum|
|Temperature Rise|Coil: 85°C maximum, Contact: 65°C maximum|
|Vibration Resistance|0 to 60 m/s2(maximum frequency: 55 Hz),<br>Frequency: 5 to 55 Hz, Amplitude: 0.5 mm|
|Shock Resistance|200 m/s2minimum|
|Mechanical Life|5,000,000 operations minimum|
|Electrical Life|200,000 operations minimum|
|Operating Temperature|–5 to +40°C (no freezing)|
|Weight(approx.)|67g|



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**RY2KS Series Latch Relays** 

## **Characteristics (Reference Data)** 

## **• Electrical Life Curve** 

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**----- Start of picture text -----**<br>
AC Load DC Load<br>5000 5000<br>30V DC resistive<br>1000 1000 30V DC inductive<br>110V AC resistive<br>500 500<br> 220V AC resistive<br>100 100<br>50 50<br>110V AC inductive 100V DC resistive<br>10 220V AC inductive 10 100V DC inductive<br>0 1 2 3 0 1 2 3<br>Load Current (A) Load Current (A)<br>Life ( 10,000 operations) × Life ( 10,000 operations) ×<br>**----- End of picture text -----**<br>


## **Internal Connection (Bottom View)** 

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**----- Start of picture text -----**<br>
1 4<br>5 8<br>9(  –  ) 10 11 (  +  )12<br>13(  –  ) SET  (  +  )14<br>RESET<br>**----- End of picture text -----**<br>


## **Dimensions** 

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**----- Start of picture text -----**<br>
Total length from the panel surface including relay socket<br>SY4S-05A: 81.3 (83.3) max., SY4S-51: 59.3 (62.3) max.<br>Dimensions in the (   )<br>include a hold-down spring.<br>2.2  ×  ø1.2 oblong hole<br>1 4<br>5 8<br>9 10 11 12<br>13 14<br>55.3 max. 6.4 21<br>2.6<br>0.5 27.5<br>**----- End of picture text -----**<br>


All dimensions in mm. 

## **• Applicable Socket and Hold-down Spring** 

|Socket||Hold-down Spring|
|---|---|---|
|Mounting Style|Type No.||
|DIN Rail Mount Socket|SY4S-05A<br>SY4S-05C|SFA-202|
|Panel Mount Socket|SY4S-51|SY4S-51F3<br>(SY4S-02F3)<br>SFA-302|
|PC Board Mount Socket|SY4S-61||
||SY4S-62|SY4S-51F3<br>(SY4S-02F3)|



Notes: 

1. For the relays with check button, use the parenthesized holddown springs shown in the above table. When the spring is used, sockets cannot be mounted closely side by side. 

2. Leaf springs come in pairs. 

3. Use the hold-down springs in environments where the relays are subject to vibrations or shocks. 

For details about sockets and hold-down springs, see page 386. 

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