Mercury Relay

CP Clare & Co. - HGRM52112S05 Relay Mercury Wetted Contacts Reed Relay, SPDT 100VA, 3V Coil.

Relay, Mercury Hg.

Form: C,  Bistable

Contacts: SPDT.

Contact Ratings: 100VA.

Coil Winding: Bifilar.

Coil Voltage: 3 V Typical, 5 V Max.

Coil Resistance: 26 Ohm.

Current: 5 Amps

Switching Frequency: 200 Hz

Operating Temperature: -38 C to 85 C

Mech Mtg: PCB, Unshielded.

Size: 1.61x 0.565 x 0.435" high.

Weight: 15 Grams

Note: Mercury Wetted. Signaaling.

UL Recognized, CSA certification, FCC68 Compatible

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CP Clare & Co. - HGJ2MT54211P02 - Relay Mercury Wetted Contacts

Relay, Mercury Hg.

Contacts: DPDT.

Contact Ratings: 100VA.

Coil Voltage: 24VDC.

Coil Resistance: 1400 Ohm.

Mech Mtg: PCB, shielded.

Size: 1.6 x 1.0 x 0.4" high.

Weight: 0.8 oz.

Note: Mercury Wetted. High sensitivity. Singe-sided stable, 1mS response.

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CP CLARE & Co. - HGSR-51111-T01

Relay, mercury. Coil: 24VDC 2600 Ohm.

Connection: 6 pin.

Electrical conf: SPDT.

Mech: PCB. Merccury Wetted Contacts.

Alt P/N: R-HG6.

 

 

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159-157-RA1 Relay, Reed. Mercury Hg-Wetted, Form C.

The mercury-wetted contact relay represents one of the more sophisticated types of relays made today. The early pioneer work in mercury-wetted contact switching dates back to the 1950’s, as telephone laboratory scientists sought out the “perfect contact”.

Reed relays use an external electromagnet to control the reed switch. The contacts are of magnetic material and the electromagnet acts directly on them without requiring an armature to move them. Sealed in a glass tube, the contacts are protected from corrosion. Mercury-wetted relays are fast in operation and have relatively good load carrying capacity and long life. The mercury films are reestablished at each contact closure and contact erosion is eliminated. The mercury films are stretchable, there is no contact bounce and because it is a mercury contact, the contact resistance is very low and idea for low level switching applications.

A mercury-wetted reed relay is a form of reed relay that employs a mercury switch, in which the contacts are wetted with mercury. Mercury reduces the contact resistance and mitigates the associated voltage drop. For high-speed applications, the mercury eliminates contact bounce, and provides virtually instantaneous circuit closure. Mercury wetted relays are position-sensitive and must be mounted according to the manufacturer's specifications. Because of the toxicity and expense of liquid mercury, these relays have increasingly fallen into disuse.

The high speed of switching action of the mercury-wetted relay is a notable advantage. The mercury globules on each contact coalesce, and the current rise time through the contacts is generally considered to be a few picoseconds. However, in a practical circuit it may be limited by the inductance of the contacts and wiring. It was quite common, before restrictions on the use of mercury, to use a mercury-wetted relay in the laboratory as a convenient means of generating fast rise time pulses, however although the rise time may be picoseconds, the exact timing of the event is, like all other types of relay, subject to considerable jitter, possibly milliseconds, due to mechanical imperfections. The only major weakness of a mercury wetted contact relay is the necessity to mount the relay within 30° of a vertical position, due to its position sensitivity.

Type: Form C

Contacts: SPDT.

Switched Load Rating: 2 Amp, 500 Volts Max, 100 VA Maximum

Carry Load Rating: 5 Amp

Contact Resistance: 14 Milliohms Typical, 20 Milliohms Max.

Packaging: Under High Pressure in Glass Capsules.

Approximate Dimensions 5.8mm D x 38mm Long. (0.225" X 1.5")

Life Expectancy: 1 billion operations minimum at rated load.

Note: Mercury Hg-Wetted.

Danger - High Pressure Glass Capsule- Handle with Care - User assumes responsibility and competency to handle this item.

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TE Connectivity Potter & Brumfield AMF - JM2-106-21 Relay, Mercury.

Hermetically Sealed

Coil: 130/140 Ohm.

Electrical Configuration: DPDT-5A.

Contacts utilize standard bridging form D Make-before-Break.

Operating temperature range: -38C to +105degC.

Body: 1.5 x 4".

Connection: 8 pin octal.

UPC: 0780333840695

Proudly Made in USA

Alternate: Clare HG2A-1042-2A1 

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Littelfuse HAMLIN - MM972C190002 - Relay, Mercury Wetted.

Input: DC.

Contacts: DPDT.

Connections: 9 PC Lead.

Mech Mtg: PCB.

Packaging: Enclosed.

Size: 40.6mm long x 20.5mm wide x 11.6mm high.

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C.P. Clare & Co - HGS1033 - SPDT - Two Coil Windings - High Speed

HGS1033-S3 in the C. P. Clare & Company catalogue from way back when - Mercury Wetted Relay.

Dual Wound Single Side Stable Unshielded

Connection: 8 Pin Octal Base

Made in USA

Removed from Equipment

Alternate: P & B JML 142082, ADLAKE MWSL-16461-3B

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C.P. Clare & Co - HG4A1011 - 4PDT 24VDC

390-Ohm Coil

Mercury Wetted-Contact Relay

14 Pin Round Plug-in Base

Hermetically Sealed

Overall Length: 3.930 inches nominal

Mounting Facility Type and Quantity: 3 threaded stud single mounting facility

Duty Type: Continuous

New Old Stock

NSN 5945-00-983-8895

Note: Retail over $1200

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DPDT-2AMP Mercury wetted contacts Dual 1125-Ohm coilBistable latching - 12VDC to 63VDC Vertical Operationpossibly removed from boards, traces of solder on very few leads . . . Learn More

Relay, mercury. Contacts: SPDT. Connections: 5 Pin. Mech Mtg: PCB. Note: High speed module. Learn More

Relay, mercury. Contacts: DPDT. Connections: 8 Octal plug in. Packaging: Metal housing. Note: Mercury wetted contact relay. "DANGER - under high pressure - Do Not Open". Used/Removed from equipment, very good condition. Learn More

Very High Resistance Coil: 25,000 Ohms Form C SPDT Non-Bridging 2-AmpsAll P&B JML relays plug into Amphenol 77MIP8 (Octal) sockets, Used relay. Learn More

Mercury wetted reed relays sealed - New printed circuit board mount 0.63 x 2.1 x 0.63" above board -=- 5-Pin HS series Form C Bistable 650-ohm coil Vertical-mount Learn More

C.P. Clare & Co - HG2A1001 Relay, HG-wetted.

Input: DC.

Contacts: DPDT.

Contact Ratings: 250VA.

Coil Voltage: 84VDC.

Coil Resistance: 5K Ohm.

Material: Mercury.

Connections: 8 Octal plug-in.

Packaging: 1.5" D x 3-5/16" high.

New Old Stock

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Relay, mercury. Case: 8 Octal, shielded. Note: Possibly used/removed from equipment. Learn More

Relay, mercury. Case: 8 Octal, shielded. Note: Possibly used/removed from equipment. Learn More

Relay, mercury. Case: 8 Octal, shielded. Note: Possibly used/removed from equipment. Learn More

Relay, mercury. Case: 8 Octal, shielded. Note: Mercury wetted. NIB. Learn More

New Mercury Relays DPDT octal, metal. Learn More

Relay. SPDT mercury wetted. Base: 8 octal plug-in. Dimensions: 32.4mm D x 77.00mm high. Made in the USA. Learn More

Relay, mercury. Contacts: 3PDT. Coil Resistance: 5K Ohm. Connections: 11 Octal plug-in. Packaging: Metal housing. Note: Mercury wetted. Bridging Form D. Make before break. New, older stock. DANGER: High pressure, Do Not Open. Three hermetically-sealed glass capsules inside. Each capsule contains a Small reservoir of mercury under a high pressure hydrogen atmosphere. Learn More

Relay, mercury. Contacts: 3PDT. Connections: 11 Octal plug-in. Packaging: Metal housing. Note: Mercury wetted. Bridging Form D. Make before break. New, older stock. DANGER: High pressure, Do Not Open. Three hermetically-sealed glass capsules inside a single coil inside an eleven-pin metal can. Each capsule contains a Small reservoir of mercury under a high pressure hydrogen atmosphere. Learn More

TE Connectivity Potter & Brumfield - JM2-111-22 Relay, Mercury.

Contacts: DPDT.

Coil Resistance: 700 Ohm.

Connections: 8 Octal plug-in connector.

Packaging: Metal housing.

Note: Mercury Wetted.

2 Form D Contacts

250VA

Double mercury-wetted reed capsules.

New Old Stock.

Proudly Made in USA

DANGER: High pressure, Do Not Open.

Alternate: Clare HG2A-1002-2A2, Adlake MW-2602-12, Aut. Elec. MC-62-A2

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Single-capsule Single-40-Ohm coil "Rare long life, high speed and unvarying dependability are the results of this hermetically sealed glass capsule, which contains a Small reservoir of Mercury sealed in a high pressure Hydrogen atmosphere. Contacts utioize standard Bridging Form D MAKE-BEFORE-BREAK arrangement, pretty damn hard to find nowadays. . . regular 8-pin round plug-in Shielded Learn More