Description
HGFR05-4A
5V Mercury Wetted Reed Relay 4 Form A
The HGFR05-4A is a mercury wetted reed relay from SHR’s HGFR series, driven by a 5VDC coil with 4 Form A contacts. Mercury wetted contacts deliver bounce-free switching with stable low contact resistance over life, making it suitable for high-reliability switching in industrial automation, test equipment and instrumentation.
Key Specifications
| Nominal coil voltage | 5 VDC |
| Max operating voltage | 6.5 VDC |
| Max pull-in voltage | 4.0 VDC max |
| Min drop-out voltage | 0.5 VDC min |
| Coil resistance | 100 Ω ±10% at 20°C |
| Max contact rating (series) | 50 W |
| Max switching voltage (series) | 1000 V DC or AC peak |
| Max switching current (series) | 1.0 A |
| Max carrying current (series) | 5.2 A |
| Max contact resistance (series) | 80 mΩ max |
| Dielectric strength (series) | 2000 V |
| Insulation resistance (series) | 1013 Ω |
| Operate time (series) | 3.0 ms |
| Reset time (series) | 3.0 ms |
| Operating temperature (series) | -20 to +70°C |
| Storage temperature (series) | -35 to +105°C |
Key Highlights
- High power mercury reed relay, dielectric strength up to 2000VDC
- High carry current
- Low contact resistance
- Excellent lifetime characteristics
- High insulation resistance up to 1013
- Custom design available
Applications
- Industrial automation
- Test and measurement equipment
- High-reliability switching systems
- Instrumentation
Specifications per the HGFR series datasheet; series-level values are marked (series). Refer to the datasheet or submit an RFQ for ordering options.





