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HGFR Mercury Relay

HGFR Series Mercury Wetted Reed Relays

High Power Mercury Reed Relay, Dielectric Strength up to 2000VDC (series)

The HGFR series is a high-power mercury wetted reed relay family with dielectric strength up to 2000VDC. Mercury wetted contacts deliver bounce-free switching, low contact resistance, and excellent lifetime characteristics for high-frequency and high-reliability applications.

Series Specifications

Dielectric strength (series) Up to 2000 VDC
Max contact rating (series) 50 W
Max switching voltage (series) 1000 V (DC or AC peak)
Max switching current (series) 1.0 A
Max carry current (series) 5.2 A
Contact resistance (series) 80 mΩ max
Isolation, contact to coil (series) 2000 V
Insulation resistance (series) 1013 Ω
Operate / reset time (series) 3.0 ms / 3.0 ms
Operating temperature (series) -20°C to +70°C

Key Highlights

  • Bounce-free mercury wetted contacts
  • High carry current up to 5.2A
  • Insulation resistance up to 1013 Ω
  • Excellent lifetime characteristics
  • Multi-pole options: 2A, 3A, 4A forms

Models in This Series

HGFR05/12/24 with 2A, 3A, 4A contact forms. Standard coil voltages: 5VDC, 12VDC, 24VDC.

Applications

  • High-frequency switching
  • Test & measurement
  • Industrial controls
  • Telecommunications

All values above are series-level specifications from the official SHR datasheet (HGFR series datasheet); individual model ratings may differ. Please refer to the series datasheet or submit an RFQ to confirm the exact configuration for your application.

Engineering selection guide

Mercury wetted relay selection details

Specify mercury-wetted relays by bounce requirement, contact stability, switching voltage/current, orientation, contact form, package and mercury-use acceptance in the end market.

Mercury wetted relay selection details product reference image
Representative product image; exact package and marking vary by model.

Selection checklist

  • Bounce-free or low-bounce switching need
  • Vertical mounting/orientation and vibration environment
  • Switching voltage/current and contact resistance
  • Insulation/leakage requirement
  • Regulatory acceptance of mercury-wetted parts
  • Replacement target: Coto, Clare, Aleph or legacy relay

Model code example: HGFR12-4A-01

HGFR
High-voltage mercury-wetted reed relay family
12
Coil voltage: 05 / 12 / 24 VDC
4A
Four Form A normally open contacts
01
Package / terminal / shield option
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