The HFD4-I-12-L is a subminiature sealed high-load latching relay designed for applications that require power-efficient switching with memory-state retention. It uses a Form 2C (DPDT / 2c/o) contact configuration, enabling control of two independent circuits in a compact PCB footprint while maintaining higher load capability than standard signal relays.
This version features a single-coil latching mechanism, meaning the relay retains its switched state without continuous coil power. This significantly reduces energy consumption, making it ideal for battery-powered systems, smart control modules, and energy-sensitive designs.
The relay operates at a 12VDC coil voltage with a 1440 coil resistance, providing controlled energization suitable for efficient switching. It supports a maximum switching current of 3A, with surge withstand capability up to 3.5A, making it suitable for moderate high-load applications.
It handles electrical loads of 3A at 30VDC and 1A at 125VAC, with a maximum rating of 250VAC / 220VDC, offering flexibility across AC and DC circuits. The gold flash contacts ensure stable conductivity, low contact resistance, and improved long-term switching reliability.
The sealed subminiature construction protects internal components from dust and environmental contamination, making it suitable for industrial-grade and long-life applications.
Features
Form 2C (DPDT / 2c/o) contact configuration
Single-coil latching operation (state retention without power)
High-load capability up to 3A switching current
Surge withstand current up to 3.5A
12VDC coil with 1440 resistance
Low power consumption design
Gold flash contacts for reliable signal integrity
Sealed subminiature construction
IEC 60335-1 compliance suitability
Specifications
Model: HFD4-I-12-L
Brand: Hongfa
Device Type: Subminiature Sealed High-Load Latching Relay
Contact Form: Form 2C (DPDT / 2c/o)
Coil Rated Voltage: 12VDC
Coil Resistance: 1440
Operating Type: Single-Coil Latching
Maximum Switching Current: 3A
Surge Current: up to 3.5A
Electrical Rating:
3A at 30VDC
1A at 125VAC
250VAC / 220VDC max
Contact Material: Gold Flash Contacts
AC/DC Voltage: DC
Applications
Battery-powered control systems
Smart home and automation modules
Industrial control logic circuits
Energy-efficient switching systems
Memory-state relay applications
The HFD4-I-12-L combines high-load capability with latching efficiency, making it ideal for systems that need strong switching performance without continuous power draw.
What's in the box
1 x HFD4-I-12-L Signal Subminiature Sealed 1-Coil Latching High-Load Relay 12VDC DPDT
