# Signal Relay, 12 VDC, DPDT, 4 A, HFD3-V Series, Through Hole, Non Latching
**URL**: https://novapart.co/products/HFD3-V/12/signal-relay-12-vdc-dpdt-4-a-hfd3-v-series-through
**SKU**: HFD3-V/12
**Manufacturer**: HONGFA
**Category**: Switches & Relays || Relays || Signal Relays
**Price**: €1.4600
**Stock**: 1000+
**Lead Time**: 190 days (indicative)
## Specifications
| Parameter | Value |
|---|---|
| Svhc | No SVHC (25-Jun-2025) |
| Coil Type | Non Latching |
| Coil Voltage | 12VDC |
| Product Range | HFD3-V Series |
| Relay Mounting | Through Hole |
| Coil Resistance | 720ohm |
| Contact Current | 4A |
| Relay Terminals | PC Pin |
| Contact Material | Silver Nickel |
| Contact Voltage Vac | 400V |
| Contact Voltage Vdc | 600V |
| Contact Configuration | DPDT |
## Datasheet
📄 [Download PDF](https://novapart.co/datasheet/farnell:4733567/)
**SUBMINIATURE SIGNAL RELAY**
## **HFD3-V**
## **Features**
**==> picture [99 x 96] intentionally omitted <==**
**----- Start of picture text -----**
File No.: E133481
V
D E
File No.: 40018867
File No.:CQC14002107409
**----- End of picture text -----**
- 3kV dielectric strength (between coil and contacts)
- Surge withstand voltage up to 6kV
- Meets EN60950 / EN41003
- 2 pairs of NO contacts connected in series with contact gap ≥ 1.5mm,product in accordance to IEC62776 available.
- SMT and THT types available
- Bifurcated contacts
- Single side stable and latching types available
## **RoHS compliant**
## **CONTACT DATA**
Contact arrangement 2C Contact resistance 1) 100m max. (at 10mA 30mVDC) Q Contact material AgNi + Au plated 2A 30VDC Contact rating 0.5A 125VAC (Res. load) 1A 277VAC 10mA 1000VDC Max. switching current 4A 1000VAC / 1500VDC ( 2 pairs of NO / NC contacts Max. switching voltage connected in series) 400VAC / 600VDC ( 1 pair of contacts) Max. switching power 277VA / 60W Min. applicable load 2) 10mV 10µA Mechanical endurance 1 x 10[7] OPS 1 x 10[5] OPS (0.5A 125VAC, Electrical endurance[3)] Resistive load, AgNi + Au plated, 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 one pair CO contact test.
## **CHARACTERISTICS**
|Insulation resistance
PF|Insulation resistance
PF|Insulation resistance
PF|1000M
(at 500VDC)
Q|
|---|---|---|---|
|Dielectric
strength
PF|Between coil & contacts
PF||3000VAC/4200VDC 1min|
||Between open contacts
PF||1500VAC/2100VDC 1min|
||Between contact sets||1500VAC/2100VDC 1min|
|Surge withstand voltage
Between open contacts(10/160µs)
Between coil & contacts(1.2/50µs)|||2.5kV
6kV|
|Operate time (Set time)|||6ms max.|
|Release time (Reset time)|||6ms max.|
|Ambient temperature|||-40
to 85
, -40
to 105
°C
°C
°C
°C|
|Humidity|||5% to 85% RH|
|Vibration
resistance||Functional|10Hz to 55Hz 3.3mm DA|
|||Destructive|10Hz to 55Hz 5.0mm DA|
|Shock
resistance||Functional|735m/s
2|
|||Destructive|980m/s
2|
|Termination|||THT, SMT|
|Unit weight|||Approx. 2.3g|
|Moisture sensitivity levels (Only for
SMT type, JEDEC-STD-020)|||MSL-3|
|Construction|||Plastic sealed|
**Notes:** 1) The data shown above are initial values.
- 2) Specification (888) series, applicable for high-temperature environments up to 105 ℃.
## **SAFETY APPROVAL RATINGS**
|**UL/CUL**|AgNi + Au plated|2A 30VDC at 85
0.5A 125VAC at 85
1A 277VAC at 85
10mA 1000VDC at 105
‘C
Cc
°C
‘C|
|---|---|---|
|**VDE**|AgNi + Au plated|2A 30VDC at 85
0.5A 125VAC at 85
Cc
Cc|
## **COIL**
|Coil power|Single side stable
200mW|
|---|---|
||1 coil latching
140mW|
|Temperature rise|70K max.|
**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
ISO9001, IATF16949 , ISO14001, ISO45001, IECQ QC 080000, ISO/IEC 27001 CERTIFIED
2026 Rev. 1.01
45
at 23
## **COIL DATA**
## **Single side stable**
|**Single side stable**|||||||
|---|---|---|---|---|---|---|
|Coil
Code|Nominal
Voltage
VDC1)|Initial Pick-up
Voltage
VDC1)
max.|Initial Drop-out
Voltage
VDC
min.|Coil
Resistance|Nominal
Power
mW|Max.
Voltage
VDC5)|
|HFD3-V/1.5|1.5|1.13|0.15|11.2 x (1
10%)|200|3.0|
|HFD3-V/2.4|2.4|1.8|0.24|28.8 x (1
10%)|200|4.8|
|HFD3-V/3|3|2.25|0.3|45 x (1
10%)|200|6.0|
|HFD3-V/4.5|4.5|3.38|0.45|101 x (1
10%)|200|9.0|
|HFD3-V/5|5|3.75|0.5|125 x (1
10%)|200|10|
|HFD3-V/6|6|4.5|0.6|180 x (1
10%)|200|12|
|HFD3-V/9|9|6.75|0.9|405 x (1
10%)|200|18|
|HFD3-V/12|12|9|1.2|720 x (1
10%)|200|24|
|HFD3-V/24|24|18|2.4|2880 x (1
10%)|200|48|
|**1 coil latching**|||||||
|Coil
Code|Nominal
Voltage
VDC1)|Initial Pick-up
Voltage
VDC1)
max.|Initial Reset
Voltage
VDC1)
max.|Coil
Resistance|Nominal
Power
mW|Max.
Voltage
VDC5)|
|HFD3-V/1.5-L1|1.5|1.13|1.13|16.1 x (1
10%)|140|3.0|
|HFD3-V/2.4-L1|2.4|1.8|1.8|41 x (1
10%)|140|4.8|
|HFD3-V/3-L1|3|2.25|2.25|64.3 x (1
10%)|140|6.0|
|HFD3-V/4.5-L1|4.5|3.38|3.38|145 x (1
10%)|140|9.0|
|HFD3-V/5-L1|5|3.75|3.75|178 x (1
10%)|140|10|
|HFD3-V/6-L1|6|4.5|4.5|257 x (1
10%)|140|12|
|HFD3-V/9-L1|9|6.75|6.75|579 x (1
10%)|140|18|
|HFD3-V/12-L1|12|9|9|1028 x (1
10%)|140|24|
|HFD3-V/24-L1|24|18|18|4114 x (1
10%)|140|48|
**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:
**==> picture [169 x 151] intentionally omitted <==**
**----- Start of picture text -----**
VCC
RES2 V_coil
RELAY DIODE V
Port1
RES1
GND
**----- End of picture text -----**
- 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.
46
## **ORDERING INFORMATION**
|**Type**|HFD3-V /
24
-L1
R
S
(XXX)|
|---|---|
|**Coil voltage**
**Sort**|1.5, 2.4, 3, 4.5, 5, 6, 9, 12, 24VDC
**L1:**1 coil latching**Nil:**Single side stable|
|**Packing style**
**Terminal type**|**S:**Standard SMT**S1:**Short terminal SMT1) **Nil:**THT2)
**R:**Tape and reel packing (Only for SMT type)
**Nil:**Tube packing(Only for THT type)3)|
||**XXX:**Customer special requirement**Nil:**Standard|
|**Special code**4)|**825:**For light load applications: testing, medical, communications, etc.|
||**888:**For use in 105℃high-temperature environments.|
- **Notes:** 1) 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 11 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.
- 2) THT relays: Use wave or manual soldering. Confirm reflow soldering feasibility with us first.
- 3) The standard tube length is 624mm,Any special requirement needed, please contact us for more details.
- 4) The customer special requirement express as special code after evaluating by Hongfa. e.g.(131): The Dielectric strength between coil & contacts is 3000VAC 1min for single side stable and 1 coil latching version.
- 5) When coil sort, terminal type or packing style are needed, pleaes add "-" after coil voltage is selected. For instance, HFD3-V/12-SR.
- 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.
- 7) 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.Flux proofed and dust cover type relays are prohibited in environments with water vapor and harmful gases (P, Cl, H2S, SO2, NO2). Plastic sealed relays shall be used with practical test verification.
## **OUTLINE DIMENSIONS, WIRING DIAGRAM AND PC BOARD LAYOUT**
Unit: mm
**==> picture [423 x 323] intentionally omitted <==**
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Outline Dimensions PCB Layout
(Bottom view)
15 7.5 8xØ1 2.54
THT type
0.5 5.08
1.15
15 7.5
1 2.54
S type:
Standard SMT
0.5 5.08
1.15 9.3
15 7.5 1 2.54
S1 type:
Short terminal SMT
0.5 5.08
1.15 7.5
**----- End of picture text -----**
47
**OUTLINE DIMENSIONS, WIRING DIAGRAM AND PC BOARD LAYOUT** Unit: mm
**==> picture [414 x 98] intentionally omitted <==**
**----- Start of picture text -----**
Single side stable 1 coil latching
1 3 4 5 1 3 4 5
Wiring Diagram
(Bottom view)
(Please pay attention to the coil 12 10 9 8 12 10 9 8
polarity. Please determine the
polarity by the wiring diagram and pin diagram) Orientation mark Orientation mark
No energized condition reset condition
**----- End of picture text -----**
**==> picture [137 x 9] intentionally omitted <==**
**----- Start of picture text -----**
Single side stable & 1 coil latching
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**==> picture [50 x 10] intentionally omitted <==**
**----- Start of picture text -----**
Pin Layout
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**==> picture [171 x 107] intentionally omitted <==**
**----- Start of picture text -----**
1 3 4 5
12 10 9 8
Orientation mark
**----- End of picture text -----**
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.
## **TAPE PACKING**
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**----- Start of picture text -----**
Unit: mm
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## Direction of Relay Insertion
**==> picture [431 x 129] intentionally omitted <==**
**----- Start of picture text -----**
I
Reel 4:1
Cover tape
Orientation mark
Feed direction
Embossed Notes: 1) Packing: 400pcs/reel, 5 reels/carton.
carrier tape 2) MOQ for reel packing is 800pcs.
I
**----- End of picture text -----**
48
## **TAPE PACKING**
Unit: mm
**==> picture [283 x 96] intentionally omitted <==**
**----- Start of picture text -----**
adhesive tape
Cover tape Cover tape adhesive tape
Feed direction
during customer usage
at least 5 empty at least 5 empty
relay positions relay positions
**----- End of picture text -----**
Reel Dimensions
**==> picture [162 x 102] intentionally omitted <==**
**----- Start of picture text -----**
29.4 1
2 0.3 24.4 1.6
3XR1.2
21 0.5
**----- End of picture text -----**
## Tape Dimensions (S type: Standard SMT)
**==> picture [389 x 119] intentionally omitted <==**
**----- Start of picture text -----**
A A-A B-B
16 0.1
2 0.1 4 0.1
0.5
B B
3.5
10.3
A
**----- End of picture text -----**
Tape Dimensions (S1 type: Short terminal SMT)
**==> picture [389 x 119] intentionally omitted <==**
**----- Start of picture text -----**
A A-A B-B
16 0.1
2 0.1 4 0.1
0.5
B B
3.5
10.3
A
**----- End of picture text -----**
49
## **CHARACTERISTIC CURVES**
## MAXIMUM SWITCHING POWER
## 2 pairs of NO contacts connected in series
1 pair of contacts
**==> picture [129 x 128] intentionally omitted <==**
**----- Start of picture text -----**
2000V
1500V
5 1000V E SS
$ ESE SS AC Resistive load a
BREE DC Resistive load ONStoot
B 100V oP PINTITN Tl
EEN
30V AEN A
10V
CECE tie
10mV10uA 10mA PATTEM 100mA 1A TTT 10A
Contact Current
**----- End of picture text -----**
**==> picture [141 x 124] intentionally omitted <==**
**----- Start of picture text -----**
1000V
3© aret DC Resistive load a
rs RS AC Resistive load H
a4B 100V elSRTES TI)
° 30V10V Sr001 A
eth
10mV
10uA t oll 10mA LET MEET 100mA 1A ELT 10A
Contact Current
**----- End of picture text -----**
## REFLOW WELDING,TEMPERATURE ON PCB BOARD
## ENDURANCE CURVE
RECOMMENDED WELDING TEMPERATURE
**==> picture [367 x 135] intentionally omitted <==**
**----- Start of picture text -----**
° 500 A A A O G
Ss ee 30VDC Temperature( )
S 100 WN Resistive Load
no 50 max.245 Soldering
Ss |e} ) 40%. 5-4 220 rN
fsi 10 SS|__| 125VACResistive Load 180 Preheating max. 3 ZN /s \
ie)=== a LSa A GO 150 ee max. 6 /s
1 0 P ETE 1 PEP 2 3 JN. max. 60 Time(s)
Contact Current (A) max. 100 max. 100
Test conditions: Resistive load, at 85oC, 1s on 9s off. 1 max. 280 |
(Only for SMT type)
**----- End of picture text -----**
## **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 40remarkably the temperature of solvents should also be controlled below 40oC.Please avoid cleaning the relay by ultrasonic, avoid using theoC after welding, then clean it and deal with coating, 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.Flux proofed and dust cover type relays are prohibited in environments with water vapor and harmful gases (P, Cl, H2S, SO2, NO2). Plastic sealed relays shall be used with practical test verification.
- 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.
50
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- [Request a quote for this part](https://novapart.co/quote/)
- [Supplier page](https://es.farnell.com/hongfa/hfd3-v-12/signal-relay-12v-4a-th/dp/4733567)
---
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