5V Coil Bistable Latching Relay DPDT 30VDC 2A 1A 125VAC HFD2-005/012/024-S-L2-D HFD2-005/012/024-M-L2-D HFD2-005/012/024-M/S
SPECIFICATIONS
Brand Name: NONE
Certification: CE
Choice: yes
Contact Load: Low Power
EU LVD Voltage: Low voltage: Below 50Vac or 75Vdc
High-concerned chemical: none
Model Number: HFD2/003-S-L2-D HFD2/005-S-L2-D
Origin: Mainland China
Power Source: Ac
Theory: Voltage relay
Use: General Purpose
is_customized: Yes
semi_Choice: yes
1. HFD2/005/012/024-S vs HFD2/005/012/024-M
Both are 8-pin DIP with identical size, pinout and PCB footprint, direct drop-in replacement. Only difference is operation mode.
S: Latching Relay
M: Normal Monostable Relay
Working Principle
M (Monostable): Coil energize → relay pull-in; power off → auto reset. Needs continuous coil power for holding, simple control.
S (Latching): State switched by short pulse; state latched after power off, no continuous power needed, ultra low power for battery devices. Positive pulse for pull-in, negative pulse for reset.
Dimension: 20.2×10.2×10.6 mm, same pin spacing, no PCB modification required.
Selection
Choose M: Power-on actuation, power-off auto reset
Choose S: State retention after power off & low power demand
2. HFD2/005/012/024-S-L2 / M-L2
10-pin DIP through-hole package
Dimension: 20.2×10.2×10.6 mm
Same PCB footprint, compatible with 16-pin IC socket.
3. Difference: -L2 vs -L2-D
Only contact material differs; same package, dimension, pinout, coil specs and electrical performance, fully pin-to-pin compatible.
Without -D: Pd-Ag alloy partial gold plating; standard performance, cost-effective for general signal control.
With -D: Pure silver full gold plating; lower contact resistance, better corrosion resistance & longer electrical life. Suitable for weak signal, high-frequency switching, harsh environment and high-reliability applications.
Common Specifications
Package: 10-pin DIP through-hole
Dimension: 20.2×10.2×10.6 mm
Contact: 2 Form C / DPDT
Contact rating: 2A 30VDC / 1A 125VAC
Operating temperature: -40℃ ~ +85℃
Selection Guide
General use & cost priority: choose non-D version
Weak signal, frequent switching, high reliability & long life: choose -D version







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