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  1. Unidentified MFG - 109-3599A - Switch, Hall Effect. With magnet.
    Special Price $1.98 Regular Price $3.00 As low as $0.98

    109-3599A - Switch, Hall Effect Switch with Magnet.

    Three-wire HFS 12" leads with mounted magnet.

    Sensor Diameter: 0.26", Legth: 1.5"

    Box is marked "Rotary Gas Magnet Assembly".

    Proudly Made in the USA.

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  2. 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

    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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  3. UNIMAX - A365A-Y - WD21X10261 - A364090 - AP3994765 Push Button Switch, Interlock. Contacts: SPST Normally Open. 125VAC 15A NEW
    Special Price $6.98 Regular Price $12.50 As low as $3.98

    UNIMAX - A365A-Y - WD21X10261 - A364090 - AP3994765 Push Button Switch, Interlock.

    Heavy Duty Switch, All Purpose Micro Push Button.

    Contacts: SPST Normally Open.

    Contact Ratings: 125/250VAC 15Amp. 3/4 HP, 125VAC, 1 1/2 HP 250VAC:

    1.8" x 0.6" x 0.6" less Quick Connect terminals and push button - 1/4" Quick Connect Terminal at each end.

    Mech: Panel, 2 holes at 1" centers.

    Button Centered on Mounting Holes.

    Panel hole: 1.817" long x 0.625" wide x 0.652" high.

    Bulk Packaged

    Color: Brown or Black.

    Alternate Part Numbers WD21X557 as used in numerous appliances as interlock door switch. Commonly used on GE, Kenmore, Hotpoint, RCA and other appliances such as dishwashers and dryers as a door interlock switch.

    Replaces/Alternates/Substitutions: AP3994765, 1263984, AH1481922, EA1481922, PS1481922, WD21X0557, WD21X557, and B00MNMS81Q.

    Save Big $$ and repair those appliances yourself.


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  4. T-BAR - 902-108C - T-BAR SWITCH 108PDT NEW 108-Pole Double Throw
    Special Price $389.98 Regular Price $850.00

    T-BAR - 902-108C - 108-POLE T-BAR SWITCH NEW

    Olympic Controls - 108 Pole Double Throw

    3-ganged 36-Pole Switches may be unconnected and used independently.

    The 902 series is desinged to switch dry circuits to a maximum 1 amp for use in data. Thermocouple and instrumentations circuits. Terminals are designed to accept T-Bar Connectors or solder holes provided. Protected again normal ambient dust conditions. Designed for use in controlled enviroment such as test areas, computer control rooms, broadcast studios and network management centers.

    Connections: Quick Connect

    Dimensions: 3.5"L x 2.5"H x 1.4" behind panel, requires three 0.5" mounting holes

    Weight:  0.75-lb

    New Old Stock 

    Made in USA

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  5. Tower Piezo Switch Development - G23NNYA-42408 - Switch, Piezo. Pushbutton, Normally Open, SPST-Pulse. Piezo Switch, 60V AC/DC 200mA. Waterproof.
    Special Price $42.98 Regular Price $64.50 As low as $34.98

    Tower Piezo Switch Development - G23NNYA-42408 - Switch, Piezo.

    A piezo switch is an electrical switch based on the Piezoelectric Effect. The charge generated by the piezoelectric element in the switch is typically used to turn on an integrated semiconductor device such as a field effect transistor (FET), causing the switch assembly's output to be active, or "on". When the FET is on, current can flow through it as with a conventional metal contact-based switch. After the voltage pulse is dissipated in the gate resistor, the FET turns back "off", its normal high impedance state. The Piezoelectric Effect uses the fact that force applied to certain materials causes stresses that generate this electric charge. In the case of piezo switches, the force could be compressive pressure that causes the (typically disc-shaped) piezo element to bend very slightly like a drumhead.

    Status: Discontinued

    Type: Piezo, Pushbutton Normally Open

    SPST-Pulse, Momentary.

    Actuator Type: Round

    Mounting Type: Panel Mount, Front 

    60V AC/DC 200mA.

    Connection: Multi Wire Lead

    Housing: Stainless Steel, with Rubber Grommet and Mounting Nut.

    For 5/8" (16mm) Hole.

    Temperature: -40 c to 85 C

    2 Conductor Wire, 6".

    Ingress Proections: IP68/IP69K - Dust Tight, Water Resistant, Waterproof.

    Mechanical Life: >10,000,000 Cycles

    Applications: In and out of water applications, Medical equipment, Testing equipment, Automatic gas pumps, Mining equipment, Car wash systems, Control panels, Packaging, Cosmetics, Paints, Petrochemical, Fertilizers, Pharmaceutical, Bakeries, Dairies, Food packing, Food Preparation, Meat processing, Gate access, Process control, Public telephones, Security doors, Irrigation systems, Locomotive control panels, Vending machines.

    Similar: Bulgin MPZ016, Schurter 1243.1318.11 (Note: Compare detailed data when substituting.)

    Made in USA


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  6. Honeywell / Microswitch - GLAA01K8C - Switch, Limit. Wobble Stick 1NC 1NO SPDT.
    Special Price $79.98 Regular Price $109.95

    Honeywell / Microswitch - GLAA01K8C Switch, Limit. Wobble Stick - Cat Whisker, SPDT Snap Action. 

    Technical Specs

    • Limit Switch StyleGeneral Purpose Limit Switch
    • Basic Actuator Style - Limit SwitchWobble Stick
    • Actuator Style - Limit SwitchWobble Stick, Cat Whisker
    • Actuator Location - Limit Switch Top
    • AC Contact Rating - Limit Switch 10A @ 600V
    • DC Contact Rating - Limit Switch 10A @ 250V
    • Contact Form- Switches 1NC/1NO
    • Actuator Length - Limit Switch 5.50"
    • Body Height - Limit Switch 3.23"
    • Body Width - Limit Switch 1.65"
    • Body Depth - Limit Switch 1.65"
    • Boot Sealed Actuator - Limit Switch No
    • Mounting - Limit Switch Surface
    • Body Style - Limit Switch Standard
    • NEMA Rating 1, 4, 12, 13
    • Wiring Entry 1/2" NPT
    • Electrical Connection Screw Terminals
    • IP Rating 67
    • Movement Wobble
    • Travel Maximum Pretravel 18 Degrees, Differential Travel 8 Degrees
    • Series GLA/GLS
    • Operating Temp. Range -13 Degrees to 185 Degrees F
    • Mounting Hole Pattern - Limit Switch 4 Hole Rectangular
    • Mounting Hole Spacing - Limit Switch 2.36" x 1.18"
    • Mounting Hole - Limit Switch (4) 0.21" dia.
    • Stem Thread - Limit Switch No Stem
    • Body Materia lZinc Die Cast
    • Arm Material Stainless Steel
    • Operating Force 0.90 in.-lb.
    • Standards UL, CE, CSA, CCC. IEC 947-5-1, EN60947-5-1, UL508
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  7. Honeywell/Micro Switch - 104TL226-5 - Switch, Toggle / Rocker. 4PDT, 3 Position Military Grade
    Special Price $189.98 Regular Price $250.00

    Honeywell/Micro Switch - 104TL226-5 Switch, Toggle.

    4PDT (Mom) On/None/Off.

    125VAC 7.5Amp/250VAC 6Amp.

    Resistive DC: 125V 0.75Amp/250V 0.5Amp/28VDC 7.5Amp.

    Inductive load: 125VAC 7.5Amp/28VDC 7.5Amp.

    Termination IWTS (16-20AWG) MIL-S-3950.

    Threaded bushing length: 0.432".

    Actuator length: 0.643".

    Operating temperature: -85 to 160 Deg F.

    Terminals accept pins M39029/1-101, not included.

    Note: Military. Environmentally sealed shaft.

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  8. Honeywell - Micro Switch - 104TL1-72 - Switch, Toggle / Rocker. Contacts: 4PDT. /MS27724-3
    Special Price $48.98 Regular Price $55.00

    Honeywell - Micro Switch - 104TL1-72 -Switch, Toggle / Rocker

    Contacts: 4PDT.

    Contact Ratings: 0.75 A at 115 Vdc,0.5 A at 250 Vdc,0.5 A to 20 A at 0.5 Vdc to 28 Vdc,0.5 A to 15 A at 0.5 Vac to 277 Vac.

    Actuator: (On) On (On) = (Mom) On (Mom).

    Mech: Bushing 15/32 in.

    Operating temperature: -85degF to +160degF.

    Note: Environmentally sealed switch, completely sealed switching chamber, high strength, temperature resistant, non-tracking case, material and silver cadmium oxide contacts.

    Military qualified MS27724-3.

    Contacts: IWTS (14-16AWG) termination.

    Double listed as MS27724-3 SKU 133204

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  9. Honeywell/Microswitch - AS419A1 - Switch, Miniature Mercury Tilt Switch
    Special Price $8.98 Regular Price $13.50 As low as $7.98

    Honeywell/Microswitch - AS419A1 Switch, tilt.

    Can handle 1 amp at 30 VAC/VDC for resistive load, 0.75amp for inductive load where differential angle between on and off positions is 5 deg. For larger differential angle of 10 deg., switch can handle 0.5 amp resistive at 110 vac. or 0.75 amps at 110 VDC.

    Miniature Mercury Tilt Switch.

    Package: Glass Envelope with 6" wire leads.

    Dimensions: 0.175" OD x 0.9" long.


    Genune Honeywell / Microswitch - New Old Stock - Rare

    NSN: 5930-21-801-9024

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  10. HEDLAND - 526-002-DCR - DC Flow-Alert Flow Limit Switch, 1A @ 24VDC
    Special Price $16.98 Regular Price $36.50

    HEDLAND - 526-002-DCR - DC Flow-Alert Flow Limit Switch, 1A @ 24VDC

    This is the Flow Limit Switch for EZ-VIEW FLOW METERS (Not Supplied) - using Hall Effect-triggered (Normally Open) Relay hermetically sealed in encapsulating compound, within Polysulfone module. The Relay, when Activated, is designed to directly control warning lights, alarms or digital inputs. WHEN CONNECTED TO THE FLOW METER (NOT SUPPLIED) The Set Point is: 0 - 100% of full scale 1-1/4" ID for Flowmeter

    Supply Voltage: 9-24 VDC

    Supply Currrent: 90 mA

    Contact Rating: 1A @ 24VDC

    Set Point: 0-100% of Full Scale

    Operating Temperature: 32-158F

    Includes Installation Instructions

    Factory New

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  11. General Electric - ASP3127-49 - HVAC Switch, Pushbutton, Heater Control, 17 Amp 120-240VAC.
    Special Price $9.98 Regular Price $18.95 As low as $6.98

    General Electric - ASP3127-49

    Status: Discontinued

    Switch, Pushbutton, Heater Control.

    Contact Ratings: 17Amp 120-240VAC, 1-1/8HP 120VAC, 2HP-240VAC.

    Actuator: Off / Low / High.

    Connection: 3 Male 1/4" Quick Connect Terminals.

    Mech: Panel Mount with 1.6" Centers.

    Body: 2.002" long x 1.196" wide x 1.189" high.

    Note: All Cancelling.

    New Old Stock

    Approvals: UL, CSA

    Proudly Made in the USA.

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  12. EAO SWITCH - 704.911.2 - Contact block for switch. One NC 10Amp 500VAC.
    Special Price $16.98 Regular Price $32.95
    Contact block for switch. One NC 10Amp 500VAC (250VDC 0.25A, 125VDC 0.5A). Slow make switching element. Screw terminal. Listed: CSA/UL 827E. Red Learn More
  13. Cutler-Hammer / Eaton - 8130K20J15V51 - 3 Position DPDT On/Off/On Motor Reversing Rocker Switch 6A 125 VAC
    Special Price $12.98 Regular Price $18.95

    Industrial Cutler-Hammer / Eaton - 8130K20J15V51, DPDT On/Off/On, Center-Off, Motor Reversing Toggle Switch (Already Cross Strapped) Permits usage for Polarity Reversing Motor. Alternate 8951159

    White Rocker Identified FWD & REV, 6A-125VAC, 3Amp 250VAC, 2A-277VAC

    Six (6) 1/4" Quick Connect Male Tabs, Dimension: 1.45" wide x 1.33" x 1.16"

    Panel Mount Fits standard .83 x 1.48 Inch Rectangular opening. Switch secured by included snap-on bezel. 

    Very handy item to have around the shop if you are DYI type. Used for all sorts of DC motor reversing applications such as camper trailer jacks, winch controls for in/out operation, door open closed, liftgate up/down, boat navigation and anchor or Automotive Motor Control.

    This switch can be used when you want to feed (2) loads from 1 or 2 sources. This switch may also be used as a SPDT switch by simply not using 3 of the terminals.

    Made with Pride in USA




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  14. Cherry Electrical Products - E73-47KT - Switch, Micro w/Roller Arm. Normally Closed (NC), Watertight sealed and Weather Proof Miniature.
    Special Price $9.98 Regular Price $12.50 As low as $7.98

    Cherry Electrical Products - E73-47KT Switch, Micro w/Roller Arm.

    Contact Ratings: 0.1Amp 125VAC, Gold Cross-Point (5V logic) Contacts.

    Actuator: Normally Closed Snap-Action.

    Long Life Coil Spring Mechanism

    High Temperature Thermoplastic Button, cove and Base.

    Temperature Rating -40 to +85C

    Hydrin Contact Boot

    Macromelt Polyamide Potting

    Stainless Steel Actuator

    Connection: 2 Wire Leads 9.5" long.

    Mech: Mounting Holes on about 5/8" centers.

    Note: Only requires about 1/3" of movement for actuation.

    Life at Rated Load = Min. 6000 operations

    IP67 Water-Resistant and Weatherproof.


    Electrical Temperature Rating: -40°to +85°C

    Flammability Rating: UL94V-O Materials

    Case: Hi-Temp Thermoplastic Nylon

    Boot: Hydrin

    Button: HiTemp Thermoplastic Nylon

    Actuator: Stainless Steel

    Potting: Macromelt Polyamide

    Contacts: Gold Crosspoint (E73)

    Characteristics inches (mm)

    Max. Rest Position: 1.041 (26.44)

    Max. Pre-travel: 0.240 (6.10)

    Operating Point: 0.762 ± 0.125 (19.36± 3.18)

    Min. Over-travel: 0.125 (3.18)

    Max. Movement Differential: 0.025 (0.635)

    Max. Operating Force : 75 gms.

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  15. Automatic Electric - 1PW54131A1 - Stepping Switch, 48VDC.
    Switch, stepping. Type 44 Switch, 3-deck, 11-position, 1-deck, 10 position, non-shorting wipers, 2 of the 4 decks gold-plated; SPDT interupter contact, 120 ohm coil; will operate switch at 36VDC but rated for 48VDC. In Original Styrofoam box. Learn More
  16. TYCO - ALCOSWITCH - 2-1437626-0 - BP1532-0 - Hardware, switch boot. Splash-proof seal.
    Special Price $2.98 Regular Price $4.50

    TYCO/ALCOSWITCH - 2-1437626-0 - BP1532-0 Hardware, Switch Boot.

    Splash-proof seal for pushbutton switches.

    15/32-32 thread size.

    Use with Series MSPF MPG.

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  17. TYCO/ALCOSWITCH - 2-1437626-1 - BP1532-2 - Push Button Switch Boots Silicone.
    Special Price $3.98 Regular Price $5.95 As low as $2.98

    TYCO/ALCOSWITCH - 2-1437626-1 - BP1532-2 - PB Switch Boots Silicone

    Splashproof seals having 1/4-40 blind nuts integrally mounted to the black Neoprene
    seal. Supplied with a captive O-Ring to complete the panel seal. Used with actuators up
    to .37" long. Choice of two-tone with nickel finish knurled ring or all black.

    15/32-32 Threaded Switch

    Splash Proof

    Seal are REd Color.

    Boot Material: Silicon

    Hex Nut Material: Brass, Nickel Plated

    Alternates: Newark 35AC0335, 6-390, 77B7531

    New Old Stock - Rare Difficult Component To Find

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  18. Dwyer Instruments / Mercoid Control - AS-9 - Pressure Switch 4 AMP, Adjustable Pressure Control 0-15 PSI "New"
    Special Price $24.98 Regular Price $49.50

    Mercoid Controls - Division of Dwyer Instruments, Inc.

    Dwyer Love Controls, Mercoid Controls AS-9 Pressure Switch, Adjustable 0-15 PSI Pressure Control. Normally Open Contacts 4 AMP with Internal Mercury Switch (Circuit closes on pressure rise). Visible Setpoint Adjustment, Calibrated scale.  

    Industrial Enclosed sealed housing Diaphram Operated Control.

    New Old Stock in Manufacturers Box.

    Similar to following Mercoid Control Pressure Switches:

    AP-153-36, AP15336, AP153R36, AP153RG36, AP-7012-153-36, AP-7021-153R36, AP-7041-153-36, AP-153-37, AP-2-36, AP236, 721G,

    Confirm Pressure requirements, contact ratings and material compatibility before substituting.

    Mercoid Controls produces a broad range of pressure, temperature, and level controls for use in heavy industrial, petrochemical, and electrical utility plants. Established in 1916, Mercoid has been serving industry for over 80 years. 

    Proudly Made in the USA.

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  19. Matsushita - S-3 TV-3 ESB-702T-671 - Switch, pushbutton, latching. DPST-3A

    Matsushita - S-3 TV-3 ESB-702T-671 -Switch, pushbutton, latching.

    Contacts: DPST.

    Ratings: 3A 250VAC.

    Actuator: push-on, push-off.

    Connection: solder terminals.

    Mech: panel mount 2 threaded holes 0.80" spacing.

    Note: Snap switch.

    Use knob #4509, 8-431

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  20. Honeywell Microswitch - 922SA2XP-C4N-L - Sensor, Hall Effect. Proximity Switch, 4 Wire, NO Contact.
    Special Price $12.98 Regular Price $16.50 As low as $9.98

    Honeywell Microswitch - 922SA2XP-C4N-l-L Sensor, Hall Effect.

    Micro Commercial Components

    Solid State Design with LED Indicator.

    Detects most metals with nominal sensing distance of 5mm depending upon metal.

    Nominal Sening Distance: 5mm

    Operates 5.0 to 30 VDCMaximum Load current: 200mA

    Normally Open Contact  

    Magnetic. 4 Wire.

    Dimensions: 0.5" OD x 1.5" long (12mm Diameter X 36mmLong)

    Treads have 1mm pitch with nut.

    3/32" Quick Connects 

    Made in Switzerland.

    NSN 5930-01-000-8864.

    New Old Stock

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  21. Lorch Electronics Corp - ES-353 - Electronic Switch -12V +5V
    Special Price $7.46 Regular Price $9.95
    Electronic Switch -12V +5V Code Ident No. 29971each with serial number New bulk. ALT NO 7-136 Learn More
  22. LEDEX - 5945-636-5462 - B-61986-A - Rotary Solenoid Switch, Motor, Stepper. Supply: 48VDC.
    Special Price $89.98 Regular Price $150.00

    LEDEX - 5945-636-5462 - B-61986-A - Rotary Solenoid Switch -Motor, Stepper with Switch/Return Spring.

    Rotary Selector Features

    Compact Design
    High Torque to Size
    Snap Action On/Off
    Return Spring

    Type: Base End Shaft, Ratcheting Rotary Solenoid

    Supply: 48VDC.

    Body Dimensions: 1.90"D x 2.74"H.

    Mount: 3 Tapped holes

    Weight: 12oz.

    With Wafer Switch.

    Additional Information: https://www.ermec.com/catalogos/2017/saia/Rotary%20DC%20Solenoids%20mm.pdf

    Military NL-71277-3-2, B-61986-A

    Made in USA

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  23. LICON - 76-1290 - Switch, limit with manual reset. Contacts: DPST.
    Switch, limit with manual reset. Contacts: DPST. Contact Ratings: 10A 125/250VAC. Actuator: two positions, maintained. Connection: four solder terminals. Mech: riveted on small plate. Body: 0.25" x 1.2"L x <1.0"H. Note: Has unusual mechanical reset once roller/lever is pushed and snaps.. Learn More
  24. JBT - MR1-123 - 3-532 -  B123J2ZQ2 - Switch, Paddle. Miniature SPDT-5A.
    Special Price $6.98 Regular Price $10.50 As low as $4.49

    JBT - MR1-123 - JBT Switch, Paddle Miniature, Electroswitch B123J2ZQ2.

    Status: Discontinued

    Contacts: SPDT.

    Switch Circuit: On - None - On

    Number of Positions: 2 Position

    Contact Ratings: 5A 125VAC.

    Voltage Rating (DC): 28 V

    Contact Material: Silver

    Actuator: Paddle. (White)

    Connection: Solder PC pins.

    Dimensions: Width: 0.47 in, Height: 1.34 in, Length: 0.75 in

    Mech: Panel Mount, two holes 0.93" spacing plus two 0.25" spacers, screws & nuts.

    Genuine  JBT - New Old Stock

    Note: Formerly Eaton (JBT) Now Electroswitch B123J2ZQ2

    Alternate: B123J2ZQ2-ND, Allied 70152395

    Made in USA


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