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Mechanical Components

This is a listing of Relay manufacturers and vendors. The listing is subdivided into Mechanical Relay, and Solid State Relays.
The types of products or devices they produce are listed under the company name, in alphabetic order.

Solid State Relay Manufacturers 'SSR'

A Solid State Relay consists of semiconductor devices mounted on a printed circuit board ~ encapsulated in plastic.
Its main characteristics are resistant to high voltage and high current, contactor-less (no noise), good isolation and ease of heat evaporation.
Of course there are no moving part to ware out either.

Integrated Circuit Vendors:

American Zettler, Inc. {General Purpose/Automotive-HVAC-Power-Telcom}

Amperite {Miniature Solid State Relay-Time Delay Relays}

Comus International {Solid State Relay - SSR Module Boards}

COSMO Electronics Corp. {4-pin SIP/Panel Mount Solid State Relay-SSR MOS output relays}

Crouzet {I/O Modules/Mounting Boards}

CRYDOM {Solid State Relays}

Dionics Inc {Power MOSFET Photovoltaic Relay Manufacturer}

International Rectifier {Telcom Relays}

NEC {Solid State Relays}

NTE Electronics Inc. {Solid State Relay Manufacturer}

Phoenix Contact {Rail Mounted Solid State Relay Modules}

Power-IO {Solid state relays, SCR thyristors, solid state contactors, IGBT based relay switching}

Solid State Optronics Inc. {Optically isolated Relays - MOSFET/SCR output}

SSAC Inc. {Time Delay Relay Manufacturer}

Teledyne Relays {Commercial/Military-AC/DC/Bi-Direction Output Solid State Relays}

{Relay Manufacturers Index}

Mechanical Relay Manufacturers

Mechanical relays have a physical motion to their action.

Mechanical Component Vendors:

Aleph International Corp. {Mercury wetted-high power/voltage-high insulation resistance 'IR'-low thermal EMF, RF relays-SMT relays}

Altech Corp. {Safety Relays}

American Electronic Components Inc. {Large Current Relays}

American Relays Inc. {Reed/High Voltage/Power Relays}

American Zettler, Inc. {General Purpose/Automotive-HVAC-Power-Telcom}

Amperite {PCB Relay; Delay-on dropout, Automotive, Flasher Recycling}

Celduc Group {Reed Relays; SIP and DIP Packages}

Clare {Reed Relays}

Comus International {Dry, Mercury Wetted, High Voltage Reed Relay}

Deltrol Controls {General Purpose-Power-Latching Relays-Buzzer/Clappers}

E. Dold & Sohne KG {PCB Relay; Safety relays, Miniature Relays}

Finder relays Inc. {Power relay - Monitoring relays}

Greenwich Electronics Inc. {Automotive/GP/Heavy Duty/Light Duty/Low Signal Relays}

Guardian Electronic Manufacturing Co. {Mechanical 1 to 30 Amp}

Hamlin {Reed Relays; Miniature reed relay in an SIL package, DIP package}

Hasco Components International Corp. {Reed/Electromechanical Relay Manufacturer}

Leach International Corp. {Military qualified subminiature and half-crystal can relays Commercial/Military}

MEDER electronic {Reed Switches/Relays; General Purpose Reed Relays, SMD Reed Relays, Low Thermal Voltage Relays,
High Insulation, Reed Relays, High Voltage Reed Relays, High Frequency Reed Relays, Reed Relay Module, Latching Reed Relays, Current Loop Reed Relays}

NTE Electronics Inc. {General-PCB-Power-Reed-Time Delay-Magnetic Latching}

Panasonic Electric Works {Power-Signal-PhotoMOS-Automotive Relays}

Phoenix Contact {Rail Mounted Mechanical Relay Modules}

Pickering Electronics {Reed Relay; Instrumentation and Automatic Test Equipment,ATE}

Schneider Electric {Commercial-Military Relay Manufacturer}

Teledyne Relays {Mechanical Relays/TO5/Aerospace/Commercial Industrial}

Tyco Electronics {Switching capabilities: dry circuit to 1,600A, up to 70kV, and as high as 6 GHz. Electromechanical Relay}

MIL-STD-1346: Relays, Selection and Application of
MIL-PRF-28776; Relays, Hybrid, Established Reliability, General Specification
MIL-PRF-6106: Electromagnetic General Specification for
MIL-R-39016: Relays, Electromagnetic, Established Reliability, General Specification MIL-R-5757

This is a general listing of [OEM] manufactures of Solid State Relays and Mechanical Relays (a Reed relay is a mechanical device).
Solid State relays are integrated circuits and have no moving parts.
How to Derate a Mechanical Relay

{Back to Relay Manufacturers Index}

Relay

Solid State Relays. [SSR] are bounce free, switch faster than mechanical relays, and have no moving parts. These are relays incorporating only semiconductor or passive circuit devices. In most cases an opto-isolator is used to control a FET which would control the switching current. ElectroMechanical Relay. [EMR] is an electromagnetically-operated switch. An actuating current on a coil operates one or more galvanically separated contacts. This type of relay must make mechanical contacts in order to switch a load. These contacts are prone to oxidation breakdown, and bounce. However Reed relays are hermetically sealed and do not suffer from oxidization as much as open contact mechanical relays do. Hybrid Relay. A relay with an isolated input and output. The input is a solid state device which controls an electromechanical output. Switching characteristics are controlled by this electromechanical output. Reed Relay. A reed relay is operated by an electromagnetic coil or solenoid which, when energized, causes two flat magnetic strips to move laterally to each other. The magnetic reeds serve both as magnetic circuit parts and as contacts. Because of the critical spacing and the frailty of the arrangement, the reeds are usually sealed in a glass tube. Contacts are made from a ferromagnetic material (reed) which are encapsulated in glass. An energizing coil is wrapped around the glass and an EMF brings the two reeds together, closing the contacts. There are two types; Dry or Wet. Both types are identical except a Wet Reed relay has a small amount of mercury added inside the glass tube, providing a more consistent contact resistance.

Sensor Relay. A sensor relay detects specified functions (for example, frequency, phase sequence, voltage level) and changes the output when the functions are within specified limits. The relay may incorporate time delay characteristics with the switching operation.

Time-delay. A delay in operate time or dropout time, or both, of the armature type relay may be obtained by placing a conducting slug or sleeve on the core in the proper position. This produces a counter magnetomotive force which results in a desired time delay. When the slug is placed on the core nearest the armature gap, a delay in operate time is obtained. Placing the slug farthest from the armature gap results in a delay in dropout time.

General Purpose. Relays with an ac or DC voltage rated coil whose contacts are rated resistive up to and including 10 A. The term general purpose may be used when discussing non-latching relays.

Intermediate Level. Relays used in a load application where there is insufficient contact arcing to effectively remove surface residue from the organic vapor deposits on the contact surface, although there may be sufficient energy to cause melting of the contact material.

Latching Relay. A bistable polarized relay having contacts that latch in either position. A signal of the correct polarity and magnitude will reset or transfer the contacts from one given position to the other. A two-position relay whose contacts transfer only as a result of coil energization, remain in that position with no coil enerization, and transfer to the alternate position only as a result of coil energization.

Low-level. Relays intended specifically for the switching of low-level or dry circuits. In these circuits only the mechanical forces between the contacts affects the physical condition of the contact interface, that is, there are no thermal or electrical effects; e.g., arcing. The current and open circuit voltage are generally defined as being in the microampere, millivolt range.

Power. Relays intended for switching loads in excess of 10 A.

Sensitive. Relays which are defined in terms of coil resistance and maximum operating current. The relatively low coil power required to operate the relay is characteristic of a sensitive relay. It is accomplished by increasing the ampere-turns, and thereby the resistance, of the coil.

Forms:
.. Form A: Normally open, when the relay is energized the circuit is completed [SPST, or DPST]
.. Form B: Normally closed, when the relay is energized the circuit is open [SPST, or DPST]
.. Form C: [SPDT]

Neutral: The transition from one switching position into another is independent of the direction of excitation

Polarized: The transition from one switching position into another is dependent on the direction of excitation

Monostable: The transition to one switching position due to an input excitation, only last while the input excitation is present, once the excitation is removed the relay returns to it's original position.

Bistable: The transition to one switching position due to an input excitation, once the excitation is removed the relay does not return to its original position. The relay requires another excitation to return to its original position

This is a general listing of Relay manufacturers and vendors. The listing is sub-divided into either mechanical relay manufacturers or solid state relay manufacturers. The types of products or devices the manufacturer produces are listed under the company name, in alphabetic order. Additional component manufacturers may be found by selecting the Components icon below, or Equipment manufacturers may be found by selecting the OEM Equipment icon.

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