An electromechanical relay is an electrically controlled switch. When its coil is energized, the induced magnetic field shifts the movable contacts, which are galvanically insulated from the control elements.
These devices are used for signal amplification and power line switches. The closed contact has very little resistance, while that of the open contact is very large. Despite problems of wear and contact bounce, they are very common in electrical engineering and automation.
Contacts are either normally open (NO) or normally closed (NC). Terminal markings indicate common, open and closed positions. Some relays are multi-pole. For example, a double-pole/double-throw (DPDT) unit has eight terminals, including the coil, which can be energized by AC or DC power.
Monostable relays have a spring which returns the contacts to the open position when power is turned off. The contacts of a bistable relay remain in place even when power is cut. A repeated or reversed command, or a second coil returns them to their previous position.
High-power relays are sometimes called contactors. Miniature relays are used with weak currents. There are also semiconductor relays with no moving parts.
Choice will depend on switching voltage, maximum current, interrupting capacity, number of poles and contact type.
- Galvanic insulation
- Wide choice of power ratings
- Mechanism subject to wear
- Contact bounce and wear
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Electromechanical relay 36 VDC | H-464 HENGSTLER
Labelling HOZ-464-1185 Drive System DC Voltage nominal 36 Coil Resistance 750 Normally Open Contact 4 Normally Closed Contact 4 Changeover...
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Fast acting electromechanical lockout relay SIEMENS Smart Grid
7PA22 and 7PA23 are fast-acting lockout relay with eight changeover contacts and four changeover contacts, respectively. Due to their quality, reliability and design, these relays are optimal for applications requiring high reliability...
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Instantaneous electromechanical relay F-OK B 400 CHAUVIN ARNOUX
The F-OK B 400 is an instantaneous electromagnetic, on-off relay with 4 double-cutout changeover contacts in series. It is a high-performance,...
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Electromechanical plug-in relay 8 - 16 A | 40 series FINDER France
Sockets 95 Series Miniature PCB relay DC coils 8 mm, 6 kV (1.2/50 μs)...
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Galvanically isolated electromechanical relay 1 - 2 channels, SIL 2 (IEC 61508) | 9172 series STAHL
I.S. Relay Module Series 9172 For binary signal...
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Electromechanical plug-in relay SPDT, 6 A | G2RV OMRON Electronics
Non-bendable! First 6 mm relay with strong mechanical pins Drawing on years of experience, G2RV industrial slim relays have been added to the product...
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Electromechanical plug-in relay max. 6 A | G2RV Omron Europe
Non-bendable! First 6 mm relay with strong mechanical pins Drawing on years of experience, G2RV industrial slim relays have been added to the product...
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Automotive electromechanical relay Panasonic Electric Works Corporation of America
Designed to switch high DC current levels of 20A to 300A. Sealed construction...
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Electromechanical relay XT series Eaton Count Control Products
The XT IEC series includes non-reversing and reversing contactors and starters as well as overload...
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Electromechanical plug-in relay Zelio Relay Schneider Electric - Automation and Control
power plug-in relay...
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Hermetically sealed electromechanical relay 750H series DWYER
Hermetically Sealed Electromechanical Relay is designed to be used in Class I Division...
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Automotive electromechanical relay 6 - 300 A | EV Panasonic Electric Works Europe AG
5 versions available:10, 20, 80, 120, 300A DC type with...
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Multi-pole electromechanical relay Yaskawa Controls
Yaskawa's Bestact high capacity 3 & 5 amp reed (RB- series) multi-pole relays offer industry standard 8 pin (octal), DIN and panel mounting capability. They have UL/cUL recognition for gaseous Class I,...
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Miniature electromechanical relay RA, RM Tele Haase Steuergeräte
Space-saving contact multiples The relays with the compact cube-shaped housing are probably the most familiar components...
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Electromechanical relay RELPOL
- contains R2, R3, R4, R2M, RY2, R10/R16, R15, R20, RUC, RU400 -...
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Electromechanical relay 16 A, 12 - 230 V | BSR01 series Yueqing Hean Electrical Co., Ltd.
Latching relay BSR01 series is used in the circuit of AC 50/60Hz, rated voltage...
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Galvanically isolated bistable electromechanical relay ATEX GEORGIN S.A.
Input : Switch Proximity sensor (NAMUR) Output...
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Instantaneous electromechanical relay 8 A, 6 - 220 V | 1210 TEC AUTOMATISMES
Instantaneous relay 2 or 3 CO contacts. Pluggable...
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Miniature electromechanical relay 6 - 12 A | PT series TE Connectivity - Schrack Relays
2 pole 12A, 3 pole 10A or 4 pole 6A, 2, 3 or 4 form C (CO) contacts DC...
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Multi-pole electromechanical relay 360 VAC Yaskawa America, Inc. - Drives & Motion Division
Yaskawa's Bestact™ high capacity 3 & 5 amp reed (RB- series) multi-pole relays offer industry standard 8 pin (octal), DIN and panel mounting capability. They have UL/cUL recognition for gaseous Class...
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Electromechanical relay module ADELsystem
Electro-mechanical relay modules allow for more uniform and rapid cabling between PLC’s and the actuators they control, enabling currents up to 16A to be controlled. Function is based on mechanical contact;...
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Electromechanical relay max. 10 A, 2 500 VA | R15 ZETTLER
Relays of general application For plug-in sockets: 35 mm rail mount acc. to PN-EN 60715; on panel mounting; solder terminals...
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Electromechanical plug-in relay RS 70020 A - F ELECTROMAGNETICA
·The plug-in neutral relays are used in SCB equipment (signalling-centralization-blocking)...
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Electromechanical relay module LÜTZE
In the area of suppression modules for contactors, valves and motors, we offer the corresponding components to increase EMC throughout the whole installation. We can meet all normal requirements in the field of power supplies with our power supply units, incorporating...
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Electromechanical relay module 5 - 6 A | RMM, RMME MURRELEKTRONIK
Coupling modules from Murrelektronik can disconnect, switch, or convert voltage - even where space is at a premium. Our product portfolio comprises a diversity of relay and optocoupler modules that use the practical terminal block format....
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Electromechanical relay module USB-ERB Series Measurement Computing
Key Highlights 8 or 24 relays Form C (SPDT) relays 6 amps at 240 VAC/28 VDC Software TracerDAQ® software included for acquiring and displaying data and generating...
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Automotive electromechanical relay 40 A, 14 V DC | SARL-H Dongguan Sanyou Electrical Appliances
External Dimension(mm) 28.0×28.0×50.0 Contact Capacity 40A 14VDC Coil Power(w) 1.80 Dielectric Strength...
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Automotive electromechanical relay 40 A, 12 V - 24 V Microhorse Electronics Co.,Ltd.
1. P/N: 620 221 Normally Open Relay Dimenion: 26 (L) x 26 (W) x 24 (H) 40 Amps 12V & 24 V 4 pins with(moulded plastic bracket or detachable metal bracket)/without mounting bracket Universal 2. P/N: 620 222 Change Over Relays Dimenion: 26 (L) x 26 (W) x 24 (H) 40 Amps 12V & 24 V 5 pins with(moulded...
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Electromechanical relay RH2L series IDEC
Magnetic Latching Relays RH2L Series The smaller magnetic latching relays with blade or PC board terminations are still rated up to 10A. They operate...
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Electromechanical relay IDEC USA
The RY/RM series of relays satisfy applications for lower level switching needs such as pilot lights or logic level devices. The RY has standard gold plated contacts to prevent contact oxidation from affecting...
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Electromechanical relay RY, RM IDEC
The RY/RM series of relays satisfy applications for lower level switching needs such as pilot lights or logic level devices. The RY has standard gold plated contacts to prevent contact oxidation from affecting circuit continuity, while optional Palladium alloy bifurcated contacts reduce contact bounce and allow circuit...
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Fast acting electromechanical lockout relay GRUNER
It was 50 years ago that the first designs by relay pioneer Wolfgang Gruner impressed specialists. Within a very short space of time, his name became a brand that secured itself a good position among premium relay providers. Today, Gruner is one...
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Octal mounted electromechanical relay 10 A, max. 480 V | GPRS-P series c3controls
Product Features Pin terminals are interchangeable with other commonly available relays. AgNi contacts, environmentally friendly - cadmium free. Mechanical...
