HK4100F-DC 5V SHG Relay 6Pin

🔌 Compact 5 V DC PCB Relay for Electronic Control Circuits

HK4100F-DC 5V SHG Relay 6Pin is a compact electromagnetic relay designed for printed circuit board installation, low-power control systems, signal switching, automation modules, microcontroller projects and general electronic applications. The relay features a 5 V DC coil and a 6-pin DIP package, making it suitable for direct PCB mounting or integration into relay modules.

With its 1C / SPDT changeover contact, the relay can switch one common terminal between normally open and normally closed contacts. This makes it useful not only for simple ON/OFF control, but also for signal routing, circuit selection and control logic switching.

⚙️ Key Features

• ✅ 5 V DC coil voltage
• ✅ 6-pin DIP package
• ✅ SPDT / 1C changeover contact
• ✅ Up to 3 A switching current
• ✅ Suitable for AC and DC loads
• ✅ Compact PCB-mount design
• ✅ Low coil power consumption – approx. 200 mW
• ✅ Fast operate and release time
• ✅ RoHS compliant

📊 Technical Specifications

Parameter	Value
Model	HK4100F-DC5V-SHG
Relay type	Electromagnetic PCB relay
Manufacturer	HUIKE / HUI KE
Coil voltage	5 V DC
Coil resistance	approx. 125 Ω
Coil rated power	approx. 200 mW
Contact form	1C / SPDT / changeover
Number of pins	6 pins
Maximum switching current	3 A
Contact rating	3 A @ 250 VAC / 3 A @ 30 VDC
Maximum switching voltage	250 VAC / 30 VDC
Contact resistance	up to 100 mΩ
Operate time	approx. 6 ms
Release time	approx. 4 ms
Operating temperature	-25 °C to +70 °C
Mounting type	PCB / DIP
Case dimensions	approx. 15.5 × 10.5 × 11.8 mm
Compliance	RoHS

🧩 Pin Function

The relay has 6 pins for coil connection and changeover contact switching:

• Coil pins – for 5 V DC control voltage
• COM – common contact
• NO – normally open contact
• NC – normally closed contact

The SPDT configuration allows the relay to switch a circuit between two states, making it suitable for both control and signal-routing applications.

🛠️ Applications

The HK4100F-DC 5V SHG relay can be used in:

• Arduino, ESP, STM32 and other microcontroller projects
• Relay control modules
• Low-power automation systems
• Signal switching circuits
• Power line switching within rated limits
• Control and protection devices
• Consumer and industrial electronics repair
• Custom PCB designs

⚠️ Usage Notes

When controlling the relay from a microcontroller, a transistor driver is usually required. A flyback diode should be installed across the coil to protect the control circuit from inductive voltage spikes. Although the coil operates at 5 V DC, the relay contacts can switch higher voltage loads within the specified current and voltage limits.

✅ Summary

HK4100F-DC 5V SHG Relay 6Pin is a compact and practical 5 V electromagnetic relay for PCB mounting, microcontroller control and low-power automation systems. Its SPDT contact configuration, 3 A switching capacity and small form factor make it a convenient choice for electronic design, repair and control applications.