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  1. Unidentified MFG - 159-157-RA1 - Relay, Reed. SPDT Mercury Hg-Wetted, Form C,
    Unidentified MFG - 159-157-RA1 - Relay, Reed. SPDT Mercury Hg-Wetted, Form C,
    Special Price $5.98 Regular Price $7.50 As low as $3.98
    IN STOCK - MORE THAN 1,000 READY TO SHIP!

    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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  2. MAXI-SWITCH -  5 Station Switch Bank, 311SM4-T SPDT Switches,  201355-1 Connector, Magnecraft 11-X-609 Solenoid.
    MAXI-SWITCH - 5 Station Switch Bank, 311SM4-T SPDT Switches, 201355-1 Connector, Magnecraft 11-X-609 Solenoid.
    Special Price $19.98 Regular Price $49.50
    READY TO SHIP - ONLY 96 LEFT IN STOCK!

    MAXI-SWITCH - 5 Station Bank Assembly.

    Maxi Switch Push Button Switchbank, 5 Station/Position Assembly, SPDT with Electro-Mech Lock to prevent accidental change. Self cancelling. Self cancelling, 5Amp 250VAC with Plus Magnecraft 24VDC Solenoid lock. Five numbered Push Buttons.

    The Assembly consists of the following major parts. Component parts value exceeds $100.

    Five Honeywell/AMP or equivalent 311SM4-T Subminiature snap-action switches, Mechanical life 1,000,000 Cycles, 5A Switches 250VAC, 30VDC, SPST Roller Lever, Contact Material Gold plated Silver, 638X6.4X14.5mm, -55C to 125C, CSA, UL RoHS Compiant, Max Operating Force:0.39N; Series:SM; Switch Case:Phenolic

    One AMP/TE Connectivity 201355-1 M-Series, Male Connector Housing, Phenolic-GF, 3.81mm, 14 way, 3 row connector. Cable Mount, For use with Female Block 201298-1

    One Magnecraft Relay Solenoid 11-X-609, 280 Ohm, USD 2400317

    Used/RFE/Removed from equipment - Excellent condition.

    Old Overstock Assembly containing many difficult to find components.

    Over 400 Sold.

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  3. UID - 3-567 - Switch, paddle. Momentary SPDT-center off.
    UID - 3-567 - Switch, paddle. Momentary SPDT-center off.
    $0.75

    Switch, toggle, paddle, momentary. Contacts: equivalent to SPDT center-off. four solder terminals 0.55"L. Terminals 2 and 3 N.C. Momentary one side shorts 1 and 2. Momentary the other side shorts 3 and 4. Mounting: PCB. Size: 0.5" x 1.4"L x 1.4" behind panel.

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  4. Cutler-Hammer Eaton - 8906K4920 - Switch, Toggle. Lever Lock, SPDT Center-Off Pull-to-Switch Momentary.
    Cutler-Hammer Eaton - 8906K4920 - Switch, Toggle. Lever Lock, SPDT Center-Off Pull-to-Switch Momentary.
    Special Price $24.98 Regular Price $38.95
    Cutler-Hammer Eaton - 8906K4920 - Switch, Toggle. Environmental Sealed, Resistant to Dust, Dirt, Spray Extreme Temperatures Contacts: SPDT. Contact Ratings: 15A @ 125VAC, 15A @28VDC. Actuator: Center-Off. Pull-to-Switch. Momentary Both Sides. Requires 0.47" diameter hole to mount, 15-32 Bushing 32 Thread Connection: Screw Terminals with screws, black dress nut, washer, nut and locating ring. Mech: Panel Mount. Thermoset molding materials meet flame retardant requirements Temperature Range: -85°F to +160°F (-65°C to +71°C) Life: 20,000 operations at rated load 40,000 operations mechanical life Note: Must Pull-to-switch either side. Applications: Aircraft-instrument, military-purpose style. Lever lock with lever seal. Made in USA - Mil Grade Lever Lock toggle switch Learn More
  5. Cutler-Hammer / Eaton - 8906K4919 - Switch, Toggle. SPDT 15A 125V. Monentary  On/Off/On
    Cutler-Hammer / Eaton - 8906K4919 - Switch, Toggle. SPDT 15A 125V. Monentary On/Off/On
    Special Price $24.98 Regular Price $38.95 As low as $19.98
    Cutler-Hammer / Eaton - 8906K4919 Switch, Toggle., Lock Lever. Environmental Sealed, Resistant to Dust, Dirt, Spray Extreme Temperatures Contacts: SPDT. Contact Ratings: 15A 125VAC. Temperature Range: -85°F to +160°F (-65°C to +71°C) Life: 20,000 operations at rated load 40,000 operations mechanical life Requires 0.47" diameter hole to mount, 15-32 Bushing 32 Thread Actuator: Momentary-both-sides, Must Pull-to-switch One side only. Center-Off. Lever Lock with Lever Seal. Connection: Screw Terminals with black dress nut, washer, nut and locating ring. Aircraft-Instrument Military-Purpose Style. (Pull-to-switch On) / Off / (On). Learn More
  6. Cherry Electrical Products - OE6930A0 - Switch, Pushbutton. Snap Action, SPDT 3 Position. 10A, 125/250 VAC, 1/3 HP
    Cherry Electrical Products - OE6930A0 - Switch, Pushbutton. Snap Action, SPDT 3 Position. 10A, 125/250 VAC, 1/3 HP
    Special Price $9.98 Regular Price $12.50 As low as $8.98

    Cherry Electrical Products - OE6930A0 - Switch, Pushbutton.

    Contacts: SPDT. 1 NO & 1 NC, Contact Material: Silver-CdO

    Contact Ratings: 10 Amp 125/250VAC (1/3HP, 125/250VAC).

    Actuator: 3 Position. Round Plunger - With Pull-To-Cheat Feature , Maintained, Momentary push. 

    Terminals: Quick Connect, Brass (Common AG plated) 

    Temperature Range: -40 to 85C

    Connections: 3/16" QC terminals.

    Operating Force: 475 g, Stainless Steel Spring

    Mounting: Panel, Snap-in Mounting. Panel Cut-out: 14mm X 28.6mm.

    Body: For hole 28mm to 30mm long x 13.3mm min x 24.7mm behind panel plus contacts.

    Housing Material: ThermoPlastic Polyester, White.

    Operation Life According to EN61058-1: 50,000 Cycles

    Listed: UL, CSA, VDE. RoHS Compliant

    Alternates: ZF Electronics 2524438, Vishay 1369901, ZF Electronics 2103633

    Complex Difficult Switch to Find

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