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. 290-1416
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.2961105
THB491.77
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24 V dc - SPDT 3.39 kΩ PCB Mount 10 mA - PCB Pin REL-MR- 24DC/21 - - Compact 1 28mm
RS Stock No. 366-265
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.G2R-1 24DC
Brand :Omron
THB125.80
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24 V dc - SPDT 1.1 kΩ PCB Mount 10A - Through Hole G2R-1 - - - - 29mm
RS Stock No. 136-5225
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Brand :Omron
THB104.91
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24 V dc - SPDT 1.1 kΩ PCB Mount 10A - Through Hole G2R-1 - - - - 29mm
RS Stock No. 476-630
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THB173.22
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24 V dc 170mW SPDT 3.39 kΩ PCB Mount 6A 4kV ac Through Hole - 400V ac 125V dc - 1 28mm
RS Stock No. 450-0295
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THB273.49
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24 V dc 900mW SPDT 750 Ω PCB Mount 15A 1.5kV ac PCB Pin - 240V ac 28V dc - 1 27mm
RS Stock No. 135-4739
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THB77.21
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5 V dc - DPDT 178 Ω PCB Mount 5A - Through Hole - - - - - 14.5mm
RS Stock No. 256-0649
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THB103.75
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5 V dc - DPDT 178 Ω PCB Mount 2A - Through Hole P2 - - - - 14.5mm
RS Stock No. 319-6182
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THB286.68
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24 V dc - DPDT 1.113 kΩ PCB Mount - - Plug In - - - - - 29mm
RS Stock No. 794-8136
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Brand :Omron
THB427.60
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24 V dc 900mW 4PDT 636 Ω Plug In 5A 2kV ac Plug In MY4 250V 125V - - 36mm
RS Stock No. 511-1149
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.22.22.9.024.4000
Brand :Finder
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24 V dc 1.25W DPNO 460 Ω DIN Rail 20A 4kV Screw 22 Series 250V ac - - 2 -
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THB245.85
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24 V dc - SPDT 1.143 kΩ DIN Rail - - Screw EMG REL - - - - 75mm
RS Stock No. 488-2575
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Brand :Omron
THB332.82
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24 V dc 900mW 4PDT 636 Ω Plug In 3A 2kV Plug In MY4 250V ac 30V dc - 4 28mm
RS Stock No. 457-2846
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.34.51.7.024.0010
Brand :Finder
THB300.49
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24 V dc 170mW SPDT 3.35 kΩ PCB Mount 6A 6kV PCB Pin 34 Series 400V ac - - 1 28mm
RS Stock No. 508-0023
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.2961192
THB293.49
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24 V dc - DPDT 1.44 kΩ PCB Mount 8A - Through Hole REL-MR- 24DC/21-21 - - - - 29mm
RS Stock No. 488-1869
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.MY4N-D2 24DC(S)
Brand :Omron
THB612.22
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24 V dc 900mW 4PDT 636 Ω Plug In 5A 2kV Plug In MY4 250V ac 30V dc - 4 28mm
RS Stock No. 161-4086
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.1-1393222-5
THB169.004
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9 V dc 220mW SPNO 364 Ω PCB Mount 8A 4kV rms Through Hole - 400V ac - - - 28.6mm
RS Stock No. 135-4660
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.RT314024 9-1393239-8
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RS Stock No. 488-1960
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.MY2N 24DC(S)
Brand :Omron
THB282.99
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24 V dc 900mW DPDT 636 Ω Plug In 10A 2kV Plug In MY 250V ac 30V dc - 2 28mm
RS Stock No. 189-4109
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.RT314024 9-1393239-8
THB92.89
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24 V dc - SPDT 1.44 kΩ PCB Mount 16A - Through Hole RT3 - - - - 29mm
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