Hongfa HF105F-1/012D-1HST 12V 40A Miniature High Power Latching Relay

Hongfa HF105F-1/012D-1HST 12V 40A Miniature High Power Relay is a high-performance PCB mount electromagnetic relay designed for switching heavy AC and DC loads with excellent reliability and long service life. Featuring a 12V DC coil, SPST-NO (1 Form A) contact configuration, and a switching capacity of up to 40A, this relay is ideal for power supplies, industrial automation, battery chargers, UPS systems, inverters, HVAC equipment, and home appliances. Its compact design, high dielectric strength, and robust AgSnO₂ contacts ensure dependable operation in demanding applications.

Hongfa HF105F-1/012D-1HST 12V Miniature High Power Latching Relay Datasheet

Features:

1. 40A High Current Switching Capability
2. 12V DC Coil Voltage
3. SPST-NO (1 Form A) Contact Configuration
4. High 4kV Dielectric Strength Between Coil and Contacts
5. Heavy Load Switching up to 7200VA
6. Approx. 900mW Low Coil Power Consumption
7. PCB Mount Design
8. Silver Tin Oxide (AgSnO₂) Contacts
9. Plastic Sealed Construction
10. Long Mechanical and Electrical Life
11. RoHS Compliant

Specifications:

Parameter	Value
Product Type	Miniature High Power Relay
Brand	Hongfa
Model	HF105F-1/012D-1HST
Contact Arrangement	1 Form A (SPST-NO)
Coil Voltage	12V DC
Rated Coil Power	Approx. 900mW
Coil Resistance	155Ω ±10%
Pick-Up Voltage (Max.)	9V DC
Drop-Out Voltage (Min.)	1.2V DC
Maximum Coil Voltage	15.6V DC
Nominal Coil Current	Approx. 77.4mA
Contact Material	AgSnO₂
Contact Resistance	50mΩ Max. (Initial)
Rated Switching Current	40A Max.
Rated Load	30A @ 240VAC, 20A @ 28VDC
Maximum Switching Voltage	277VAC / 28VDC
Maximum Switching Capacity	11080VA / 1200W
Dielectric Strength (Coil to Contacts)	2500VAC / 4000VAC (Depending on Terminal Type)
Dielectric Strength (Open Contacts)	1500VAC for 1 Minute
Insulation Resistance	1000MΩ Min. @ 500VDC
Operate Time	15ms Max.
Release Time	10ms Max.
Mechanical Life	10 × 10⁶ Operations
Electrical Life	100,000 Operations (Resistive Load)
Shock Resistance	98m/s² Functional, 980m/s² Destructive
Vibration Resistance	10Hz–55Hz, 1.5mm Double Amplitude
Ambient Temperature	-55°C to +85°C (DC Coil)
Humidity	5% to 85% RH
Mounting Type	PCB Through Hole
Termination	PCB Pins
Construction	Plastic Sealed
Approximate Weight	36g
Safety Approvals	UL, cUL, VDE, CQC
Applications	UPS Systems, Power Supplies, Battery Chargers, Industrial Automation, HVAC Equipment, Home Appliances, Inverters, Motor Control
RoHS Compliance	Yes

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Package Includes:

1 x Hongfa HF105F-1/012D-1HST 12V 40A Miniature High Power Relay