Non-Latching Relays

Relays are electrical switches that are operated by electrical impulses with the primary function to open and close a circuit, they can also be referred to as industrial switches. There are 2 main types available, latching and non–latching relays.


How do non-latching relays work?


Non-latching relays are in a normally closed (NC) position and will stay in this state without power. When power passes through the circuit, the relay switched to a normally open (NO) position by using an internal coil to generate a magnetic force, holding this NO position. Once the current is turned off, it returns to the NC position. This makes non-latching relays well suited to push-button applications like keyboards and micro-controller input buttons.


What are non-latching relays used for?


Non-latching relays are highly durable and versatile components, making their performance long lasting and suitable for use in a wide range of applications, such as:


  • Automotive engines

  • Household appliances

  • Industrial machinery

  • Medical equipment

  • Telecommunications equipment

What is the difference between latching and non-latching relays?


Both types of relays in similar in design and function, however, a significant difference between them is that a latching relay will remain in the last position it when it was last powered, whereas a non-latching goes back to its normal position. This makes each more type of relay suitable for different applications.


Considerations when selecting a relay


When choosing a relay, it is important to consider a number of specifications to ensure it is fit for purpose, some factors include:


  • Coil voltage - the required voltage to actuate the switching mechanism. If a voltage is too high this could damage the components, if it is too low then it will not actuate.

  • Contact configuration - This is the state the contacts are in without power. For example SPST, single pole single throw.

  • Contact material - the relay contacts are available in many materials that have certain properties. Common materials are gold, silver, tin oxide and nickel

  • Coil power - the amount of power (watts) the coil operates at. This must match the power in the circuit for correct function.

  • Coil resistance - the amount of resistance (ohms) in the circuit that the coil creates.


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รายละเอียดสินค้า / Description ราคา / Price Coil Voltage Coil Power Contact Configuration Coil Resistance Mounting Type Switching Current Isolation Coil To Contact Terminal Type Series Maximum Switching Voltage AC Maximum Switching Voltage DC Application Number of Poles Length
RS Stock No. 366-300
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.G2R-1-E 24DC
Brand :Omron
THB184.68
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24 V dc - SPDT 1.1 kΩ PCB Mount 16A - Through Hole G2R-1 - - - - 29mm
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THB114.80
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24 V dc - DPDT 1.152 kΩ PCB Mount 2A - Through Hole G5V - - - - 20.5mm
RS Stock No. 776-1667
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THB599.40
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230 V ac 1.5W 4PDT 17 kΩ Plug In 7A - Plug In 55 Series - - - 4 27.7mm
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Brand :Omron
THB302.24
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24 V dc 530mW SPDT 1.1 kΩ Plug In 10A 5kV ac Through Hole G2R 380V ac 125V dc - - 29mm
RS Stock No. 385-929
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THB490.61
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24 V dc 1W 4PDT 600 Ω Plug In 7A - Quick Connect 55 Series 400V ac - - 4 27.7mm
RS Stock No. 168-0262
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THB87.289
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12 V dc 140mW DPDT 1.029 kΩ PCB Mount 2A 1.5kV rms Surface Mount Axicom P2 250V 220V - 2 14.6mm
RS Stock No. 515-577
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THB116.51
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12 V dc 140mW DPDT 1.029 kΩ PCB Mount 2A 1.5kV rms Surface Mount Axicom P2 250V 220V - 2 14.6mm
RS Stock No. 884-1272
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230 V ac 1.2W DPDT 15 kΩ Plug In 12A - Plug In - 250V - - 2 21mm
RS Stock No. 333-9929
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THB184.60
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24 V dc - DPDT 777 Ω PCB Mount 12A - Quick Connect PT - - - 2 28mm
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THB711.94
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24 V dc 1.5W 4PDT 350 Ω Plug In 10A 2kV ac PCB Pin LY4N 250V 125V - - 41.5mm
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Brand :Turck
THB1,083.73
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24 V dc 1.3W 3PDT 433 Ω Plug In 10A 2.5kV Plug In C3-A30 250V 220V - - 35mm
RS Stock No. 164-0166
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12 V dc - SPNO 360 Ω PCB Mount 12A - Through Hole RT1 - - - 1 29mm
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THB83.39
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24 V dc 1.5W SPDT 362 Ω PCB Mount 45A 500V rms PCB Pin - - 30V dc - 1 26.5mm
RS Stock No. 245-2481
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THB547.23
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230 V ac 2.2W 3PDT 7.25 kΩ Plug In 16A 6kV Quick Connect 62 Series 250V ac - - 3 68mm
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12 V dc - SPNO 360 Ω PCB Mount 12A - Through Hole RT1 - - - 1 29mm
RS Stock No. 790-3319
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Brand :Fujitsu
THB105.06
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12 V dc 530mW DPDT 270 Ω PCB Mount 5A 10kV PCB Pin - 400V ac 300V dc - - 29mm
RS Stock No. 842-3622
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.C3-A30FX/024VDC
Brand :Turck
THB1,508.42
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24 V dc 1.3W 3PDT 433 Ω Plug In 10A 2.5kV Plug In C3-A30 250V 220V - - 35mm
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