HGMR Mercury Relay

Mercury Wetted Zero Bounce High Current

HGMR Series

Miniature Mercury Wetted Relay offering “bounce-free” switching and contact stability. Ideal for high-speed counting and precision pulse generation.

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HGMR Series Miniature Mercury Wetted Relay

0ms Contact Bounce

>2 Billion Operations Life

50W Power Switching

5.2A Max Carry Current

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HGMR Series Catalog Mercury Wetted Relay Specification (PDF)

⚠️ Position Sensitive

Mercury wetted relays are position sensitive. They must be mounted vertically (±30°) to ensure the mercury pool remains at the bottom of the switch capsule.

Part Number	Coil Voltage	Contact Form	Switching V.	Max Current	Datasheet	Action
HGMR05-1A	5 VDC	1 Form A	1000V	5.2A	📄 PDF	Quote
HGMR12-1A	12 VDC	1 Form A	1000V	5.2A	📄 PDF	Quote
HGMR24-1A	24 VDC	1 Form A	1000V	5.2A	📄 PDF	Quote

Part Number Decoder

HGMR [05] – 1A [OPT]

HGMR Miniature Mercury Series

[05] Coil: 05, 12, 24 VDC

1A 1 Form A (NO)

[OPT] Options (e.g., Power)

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.

Download selection catalog PDF Download family datasheet PDF Request engineering RFQ

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

Mercury wetted relay selection details dimension envelope illustration — Dimension envelope illustration; use the final drawing before PCB/tooling release.

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

Representative models

HGFR12-4AHGFR24-2A-01HGMR12-1A001HGSR12-2A04HVR1A12-HGMH12-1A8K

Use these models as starting points when comparing voltage, current, contact form, package and application duty.

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