HFD4/5-LS1R

**SUBMINIATURE SIGNAL RELAY** 

## **HFD4** 

## **Features** 

- Subminiature signal relay of 4th generation 

- Surge withstand voltage up to 2500V 

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A\ »<br>File No.:E133481<br>File No.:R50333270<br>**----- End of picture text -----**<br>


- High contact capacity 2A 30VDC 

- Providing J-leg SMT version for intensive installation 

- Monostable sensitive type with 100mW coil power is available 

- Single side stable and latching type available 

- High temperature resistant products at 105 

- are available 

- Meets IEC62368-1 reinforce insulation 

- Products compliant with IEC60079 available 

- Products compliant with IEC 60335-1 available 

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File No.:CQC16002154335(Single side stable)<br>CQC16002154336(Latching)<br>**----- End of picture text -----**<br>


## **CONTACT DATA** 

Contact arrangement 2C Contact resistance[1)] 100m max. (at 10mA 30mVDC) Contact material AgNi + Au plated Contact rating 1A 30VDC (Res. load) 0.3A 125VAC Max. switching current 2A Max. switching voltage 250VAC / 220VDC Max. switching power 62.5VA / 60W Min.  applicable load[2)] 10mV 10µA Mechanical endurance 1 x 10[8] OPS 1 x 10[5] OPS (AgNi + Au plated, Electrical endurance[3)] 0.3A 125VAC, Resistive load, at 85oC, 1s on 9s off) 

**Notes:** 1) The data shown above are initial values. 

   - 2) Min. applicable load is reference value. Please perform the confirmation test with the actual load before production since reference value may change according to switching frequencies, environmental conditions and expected contact resistance and reliability. 

- 3) Electric endurance data are collected in the NO or NC contact test . 

- **COIL** 

Single side stable See "COIL DATA" Coil power 1 coil latching See "COIL DATA" ~~+~~ Temperature rise 50K max.(At 1A load, 85 environment) 

## **HIGH FREQUENCY**[1)] 

|Frequency|100MHz|
|---|---|
|Insertion loss|0.04dB(Typ.)|
|Voltage standing wave ratio V.SWR|1.06(Typ.)|
|Isolation|43dB(Typ.)|



- **Notes:** 1) The characteristic impedance of the measuring system is 50 Ω ; 2) The data shown above are initial values; 3) If  you need higher frequency band, please contact us. 

- Low halogen products conforming to IEC 61249- 

- 2-21 are available 

**RoHS compliant** 

## **CHARACTERISTICS** 

|Insulation resistance<br>|<br>tiCd|Insulation resistance<br>|<br>tiCd|Insulation resistance<br>|<br>tiCd|1000M<br>(at 500VDC)<br>Q|
|---|---|---|---|
|Dielectric<br>strength<br>||Between coil & contacts<br>|<br>tiCd||1600VAC  1min|
||Between open contacts<br>|<br>ti Cd||1000VAC  1min|
||Between contact sets||1800VAC  1min|
|Surge<br>withstand<br>voltage|Between open contacts<br>(10/160µs)||1500VAC (FCC part 68)|
||(10/160µs)<br>Between coil & contacts<br>(2/10µs)||2500VAC (Telecordia)|
|Operate time (Set time)|||3ms max.|
|Release time (Reset time)|||3ms max.|
|Ambient temperature|||-40<br>to 85<br>-40<br>to 105<br>2)<br>oo<br>c<br>-|
|Humidity|||5% to 85% RH|
|10Hz to 55Hz 3.3mm DA<br>Vibration resistance|||10Hz to 55Hz 3.3mm DA|
|Shock<br>resistance||Functional|735m/s<br>2|
|||Destructive|980m/s<br>2|
|Termination|||THT, SMT|
|Unit weight|||Approx. 0.8g|
|Moisture sensitivity levels (Only for<br>SMT type, JEDEC-STD-020)|||MSL 3<br>;|
|Construction|||Plastic sealed<br>;|



## **SAFETY APPROVAL RATINGS** 

|**UL/CUL**|AgNi + Au plated|1A 30VDC at 85<br>1A 30VDC at 105<br>2A 30VDC at 40<br>0.5A 125VDC at 40<br>0.3A 125VAC at 85<br>0.5A 125VAC at 40<br>C<br>C<br>C<br>Cc<br>C|
|---|---|---|
|**TÜV**|AgNi + Au plated|1A 30VDC at 85<br>0.3A 125VAC at 85<br>0.5A 125VAC at 85<br>c<br>c<br>Cc|



**Notes:** 1) All values unspecified are at room temperature. 

- 2) Only typical loads are listed above. Other load specifications can be available upon request. 

HONGFA RELAY ee ISO9001, IATF16949 , ISO14001, OHSAS18001, IECQ QC 080000,ISO/IEC 27001  CERTIFIED 2025 Rev. 1.00 

67 

## **COIL DATA** 

at 23 

## **Single side stable and Standard type** 

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CodeCoil NominalVoltageVDC [(1)] Initial Pick-upVoltagemax.VDC1) Initial Drop-outVoltageVDCmin. ResistanceCoil approx.powerRatedmWcoil VoltageVDCMax. [(4)]<br>HFD4/1.5 1.5 1.13 0.15 16 x (1 10%) 140 3.0<br>HFD4/2.4 2.4 1.8 0.24 41 x (1 10%) 140 4.8<br>HFD4/3 3 2.25 0.3 64.3 x (1 10%) 140 6.0<br>HFD4/4.5 4.5 3.38 0.45 145 x (1 10%) 140 9.0<br>HFD4/5 5 3.75 0.5 178 x (1 10%) 140 10<br>HFD4/6 6 4.5 0.6 257 x (1 10%) 140 12<br>HFD4/9 9 6.75 0.9 579 x (1 10%) 140 18<br>HFD4/12 12 9 1.2 1028 x (1 10%) 140 24<br>HFD4/24 24 18 2.4 2880 x (1 10%) 200 48<br>**----- End of picture text -----**<br>


## **Monostable sensitive type(478 version)** 

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Rated<br>Nominal Initial Pick-up Initial Drop-out Coil coil Max.<br>Coil Voltage Voltage Voltage Resistance power Voltage<br>Code VDC [(1)] max.VDC1) VDCmin. approx.mW VDC [(4)]<br>HFD4/1.5 1.5 1.2 0.15 22.5 x (1 10%) 100 3.0<br>HFD4/2.4 2.4 1.92 0.24 58 x (1 10%) 100 4.8<br>HFD4/3 3 2.4 0.3 90 x (1 10%) 100 6.0<br>HFD4/4.5 4.5 3.6 0.45 203 x (1 10%) 100 9.0<br>HFD4/5 5 4 0.5 250 x (1 10%) 100 10<br>HFD4/6 6 4.8 0.6 360 x (1 10%) 100 12<br>HFD4/9 9 7.2 0.9 810 x (1 10%) 100 18<br>HFD4/12 12 9.6 1.2 1440 x (1 10%) 100 24<br>HFD4/24 24 19.2 2.4 5760 x (1 10%) 100 48<br>**----- End of picture text -----**<br>


## **1 coil latching** 

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CodeCoil NominalVoltageVDC [(1)] Initial Pick-upVoltagemax.VDC1) Initial Drop-outVoltageVDCmin. 1) ResistanceCoil powerRatedmWcoil VoltageVDCMax. [(4)]<br>approx.<br>HFD4/1.5-L 1.5 1.13 1.13 22.5 x (1 10%) 100 3.0<br>HFD4/2.4-L 2.4 1.8 1.8 58x (1 10%) 100 4.8<br>HFD4/3-L 3 2.25 2.25 90 x (1 10%) 100 6.0<br>HFD4/4.5-L 4.5 3.38 3.38 203 x (1 10%) 100 9.0<br>HFD4/5-L 5 3.75 3.75 250 x (1 10%) 100 10<br>HFD4/6-L 6 4.5 4.5 360 x (1 10%) 100 12<br>HFD4/9-L 9 6.75 6.75 810 x (1 10%) 100 18<br>HFD4/12-L 12 9 9 1440 x (1 10%) 100 24<br>HFD4/24-L 24 18 18 2880 x (1 10%) 200 48<br>**----- End of picture text -----**<br>


68 

## **COIL DATA** 

at 23 

**Notes:** 1) The data shown above are initial values. 

- 2) To supply rated step voltage to coil is the foundation of relay proper operation. Please make sure the applied voltage to the coil reach at rated values. 

Please refer to the typical diagram below for single side stable relay. The "V_coil" is the rated voltage: 

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VCC<br>RES2 V_coil<br>RELAY DIODE V<br>Port1<br>RES1<br>GND<br>**----- End of picture text -----**<br>


- 3) In case 5V of transistor drive circuit, it is recommended to use 4.5V type relay, and 3V to use 2.4V type relay. 

- 4) For monostable relays，if you need to drop down voltage and hold mode after reliably operating,make sure that the effective value of holding voltage is not less than 60% of the rated voltage. 

- 5) Maximum voltage refers to the maximum voltage which relay  coil could endure in a short period of time. 

- 6) When user's requirements can't be found in the above table, special order allowed. 

- 7) During the relay pick-up or drop-out processes, there are stages of contact pressure change, contact vibration and unstable contact etc. When the voltage applied to coil is gradually changed, it will lengthen the unstable stage and affect relay endurance. To reduce this influence, please apply step voltage(switching circuit) to relay coil. 

## **ORDERING INFORMATION** 

|**Coil voltage** <br>**Sort**<br>**Type**|1.5,  2.4,  3,  4.5,  5,  6,  9, 12,  24VDC<br>HFD4  /<br>24<br>-L<br>(XXX)<br>R<br>S<br>**L:**1 coil latching**Nil:**Single side stable|
|---|---|
|**Terminal type**<br>**Packing style**|2)<br>**R:**Tape and reel packing (Only for SMT type)<br>**Nil:**Tube packing(Only for THT type)<br>**S3:**J-legs SMT**Nil:**THT1)<br>**S:**Standard SMT**S1:**Short terminal SMT|
|**Special code**3)|**XXX:**Customer special requirement**Nil:**Standard<br>For instance: (478) indicates a monostable sensitive product with a rated coil power of 100mW;|
||(888) is for application at 105<br>;|
||(356) indicates a low-halogen product that meets the requirements of|
||IEC 61249-2-21.|
||(825) Indicates products suitable for tiny load applications such as testing,|
||medical, communications, etc.|



- **Notes:** 1) Please use wave soldering or manual soldering for straight-in relay. If you need reflow welding, please confirm the feasibility with us. 

   - 2) R type (tape and reel) packing is moisture-proof which meets requirement of MSL-3. Please choose R type packing for SMT products. For R type, the letter "R" will only be printed on packing tag but not on relay cover. Tube packing is normally not available for SMT products unless specially requested by customer. But please note that tube packing is not moisture-proof so please bake the products before use according to description of Notice 10 herewith. In addition, tube packaging will be adopted when the ordering quantity of R type is equal to or less than 100 pieces unless otherwise specified. 

> 3) The customer special requirement express as special code after evaluating by Hongfa. 

- 4) When coil sort, contact material, terminal type or packing style are needed, pleaes add "-" after coil voltage is selected. For instance,HFD4/24-SR. 5) The standard tube length is 520mm,Any special requirement needed, please contact us for more details. 

- 6) For products that should meet the explosion-proof requirements of "IEC 60079 series",please note [Ex] after the specification while placing orders.Not all products have explosion-proof certification,so please contact us if necessary, in order to select the suitable products. 

69 

Unit: mm 

## **OUTLINE DIMENSIONS, WIRING DIAGRAM AND PC BOARD LAYOUT** 

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Outline Dimensions<br>**----- End of picture text -----**<br>


PCB Layout (Bottom view) 

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10 0.2 6.5 0.2 8x Ø 0.85 3.2 2.2 2.2<br>THT type<br>0.4 2.2 2.2 5.08<br>1.2<br>3.2<br>3.2 2.2 2.2<br>10 0.2 6.5 0.2<br>Standard<br>SMT type<br>0.8<br>5.08<br>0.4<br>7.5<br>1.2 3.2 2.2 2.2<br>**----- End of picture text -----**<br>


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10 0.2 6.5 0.2<br>3.2 2.2 2.2<br>Short terminal<br>SMT type<br>0.8<br>5.08<br>0.4 6.6<br>1.2 3.2 2.2 2.2<br>**----- End of picture text -----**<br>


70 

Unit: mm 

## **OUTLINE DIMENSIONS, WIRING DIAGRAM AND PC BOARD LAYOUT** 

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Outline Dimensions PCB Layout<br>(Bottom view)<br>**----- End of picture text -----**<br>


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10 0.2 6.5 0.2<br>3.2 2.2 2.2<br>J-legs<br>SMT type 0.8<br>0.4 2.8<br>1.2 3.2 2.2 2.2 5.08<br>Single side stable  1 coil latching<br>1 2 3 4 1 2 3 4<br>Wiring Diagram<br>(Bottom view)<br>8 7 6 5 8 7 6 5<br>Orientation mark Orientation mark<br>No energized condition                                     Reset condition<br>1 2 3 4<br>Pin Layout<br>8 7 6 5<br>Orientation mark<br>**----- End of picture text -----**<br>


Remark: 1)  In case of no tolerance shown in outline dimension: outline dimension ≤ 1mm, tolerance should be ±0.2mm; outline dimension ＞ 1mm and ≤ 5mm, tolerance should be ±0.3mm; outline dimension ＞ 5mm, tolerance should be ±0.4mm. 

> 2)  The tolerance without indicating for PCB layout  is always ±0.1mm; 

- 3)  The width of the gridding is 2.54mm. 

70 

## **TAPE PACKING** 

## Direction of Relay Insertion 

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I<br>Reel 4:1<br>Cover tape Orientation mark<br>Feed direction<br>Embossed<br>carrier tape<br>I<br>Notes:  1 、 S type/S1 type ： 1)  Packing: 900pcs/reel, 4 reels/carton.<br>                               2)  MOQ for reel packing is 900pcs<br>             2 、 S3 type ： 1)  Packing: 850pcs/reel, 4 reels/carton.<br>                    2)  MOQ for reel packing is 850pcs..<br>**----- End of picture text -----**<br>


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adhesive tape<br>Cover tape Cover tape adhesive tape<br>Feed direction<br>during customer usage<br>at least 5 empty at least 5 empty<br>relay positions relay positions<br>**----- End of picture text -----**<br>


Reel Dimensions 

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Ø13  0.2 29.4  1<br>2  0.3  24.4 [1.6] 0<br>Ø Ø<br>3-R1<br>Ø 21  0.5<br>**----- End of picture text -----**<br>


71 

Unit: mm 

## **TAPE PACKING** 

Tape Dimensions (S type: Standard SMT) 

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4 A-A B-B<br>2 Ø 1.5 [0] 0 B 0.5  0.05<br>3 。<br>A A<br>Ø 2 8.1  0.2<br>6<br>12 B<br>**----- End of picture text -----**<br>


Tape Dimensions (S1 type: Short terminal SMT) 

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4 A-A B-B<br>2 Ø 1.5 [0] 0 B<br>0.5  0.05<br>3 。<br>A A<br>Ø 2 7  0.2<br>6<br>12 B<br>**----- End of picture text -----**<br>


Tape Dimensions (S3 type: J-legs SMT ) 

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4 A-A B-B<br>2 Ø 1.5 [0] 0 B<br>3 。<br>A A<br>Ø 2 7  0.2<br>12 B<br>**----- End of picture text -----**<br>


72 

## **CHARACTERISTIC  CURVES** 

## REFLOW WELDING,TEMPERATURE ON PCB BOARD 

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MAXIMUM SWITCHING POWER<br>**----- End of picture text -----**<br>


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MAXIMUM SWITCHING POWER ENDURANCE CURVE ON PCB BOARD<br>RECOMMENDED WELDING TEMPERATURE<br>1000V 500<br>Temperature<br>( )<br>$s =A AC Resistive Load = 100 Litttt| tttyy<br>§ 100V LIEN = 8 NSS aso Resistive Load30VDC max.245 Soldering<br>220<br>30V DC Resistive Load 180 max. 3 /s<br>6 10V ESSS 10 CREAR 150 plSoe Preheating A KN max. 6 /s<br>eee er ee eet o SS 125VAC eee Resistive Load<br>ESSEa Ee 6 KEE<br>|<br>10mV 10uA 100mA 1A 10A 1 0 KAA HH 1 1.2 max. 100 max. 100 Sf max. 60 Time(s)<br>{TCE  FCC FEEEEEE-EFE St max. 280<br>Contact Current Contact Current (A)<br>Test conditions: (Only for SMT type)<br> Energized with rated voltage<br> Resistive load, at 85oC, 1s on 9s off.<br>**----- End of picture text -----**<br>


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RECOMMENDED WELDING TEMPERATURE<br>**----- End of picture text -----**<br>


## **Notice** 

- 1) This relay is highly sensitive polarized relay, if correct polarity is not applied to the coil terminals, the relay does not operate properly. 

- 2)   To avoid using relays under strong magnetic field which will change the parameters of relays such as pick-up voltage and drop-out voltage. 

- 3)   Relay is on the “reset” status when being released from stock, with the consideration of shock risen from transit and relay mounting, it should be changed to the “set” status when application(connecting to the power supply). Please reset the relay to “set” or “reset” status on request. 

- 4)   Energizing coil with rated voltage is basic for normal operation of a relay, please make sure the energized voltage to relay coil have reached the rated voltage. Regarding latching relay, in order to maintain the "set" or "reset" status, impulse width of the rated voltage applied to coil should be more than 5 times of "set" or "reset" time. 

- 5)   For a monosteady state relay, after the relay is reliably operated, if it needs to be kept under pressure, make sure that the effective value of the voltage is not less than 60% of the rated voltage; 

- 6)   The relay may be damaged because of falling or when shocking conditions exceed the requirement. 

- 7)   For SMT products, validation with real application should be done before your series production, if the reflow-soldering temperature curve is out of our recommendation. Generally, two-time reflow-soldering is not recommended for the relay. However, if two-time reflow-soldering is required, a 60-min. interval should be guaranteed and a validation should be done before production. 

- 8)   Please use wave soldering or manual soldering for straight-in relay. If you need reflow welding, please confirm the feasibility with us. 

- 9)   Contact is recommended for suitable condition and specifications if water cleaning or surface process is involved in assembling relays on PCB. 10) Regarding the plastic sealed relay, we should leave it cooling naturally untill below 40oC after welding, then clean it and deal with coating, remarkably the temperature of solvents should also be controlled below 40oC.Please avoid cleaning the relay by ultrasonic, avoid using the solvents  like gasoline, Freon, and so on, which would affect the configuration of relay or influence the environment. 

- 11) Relays packaged in moisture barrier bags meet MSL-3 requirements. The relays should be stored at ambient conditions of ≤ 30 ℃ and ≤ 60% RH after they are removed from their packaging, and should be used within 168 hours. If the relays cannot be used within 168 hours, please repack them or store them in a drying oven at 25 ℃± 5 ℃ , ≤ 10% RH. Otherwise, relays may be subjected to a soldering test to check their performance, or they may be used after keeping them in an oven for 72 hours at with 50 ℃± 5 ℃ , ≤ 30% RH. 

- 12) When applied with continuous current, the heat from relay coil will age its isolation. Thus, please do not ground connected the coil to reduce electrical errosion if possible. And please provide protection circuit to avoid broken wire and losses. 

- 13) Please make sure that there are no silicon-based substances (such as silicon rubber, silicone oil, silicon-based coating agents, silicon fillers, etc.) around the relay, because it will generate silicon-containing volatile gas, which may cause poor contact in case of silicon-containing volatile gas sticking on contact 

- 14) About preferable condition of operation, storage and transportation, please refer to "Explanation to terminology and guidetines of relay". 

- 15) During the relay pick-up or drop-out processes, there are stages of contact pressure change, contact vibration and unstable contact etc. When the voltage applied to coil is gradually changed, it will lengthen the unstable stage and affect relay endurance. To reduce this influence, please apply step voltage(switching circuit) to relay coil. 

## Disclaimer 

The specification is for reference only. See to "Terminology and Guidelines" for more information. Specifications subject to change without notice. We could not evaluate all the performance and all the parameters for every possible application. Thus the user should be in a right position to choose the suitable product for their own application. If there is any query, please contact Hongfa for the technical service. However, it is the user’s responsibility to determine which product should be used only. 

> ©  Xiamen Hongfa Electroacoustic Co., Ltd.  All rights of Hongfa are reserved. 

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