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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Description Price Coil Voltage Coil Power Contact Configuration Coil Resistance Mounting Type Switching Current Isolation Coil To Contact Maximum Switching Current AC Maximum Switching Current DC Terminal Type Maximum Switching Voltage AC Maximum Switching Voltage DC Application Number of Poles
RS Stock No. 366-293
Mfr. Part No.G2R-1-E 12DC
BrandOmron
£4.46
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12V dc - SPDT 275 Ω PCB Mount 16A - - - Through Hole - - - -
RS Stock No. 353-887
Mfr. Part No.G2R-2-SN 24DC(S)
BrandOmron
£6.91
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24V dc - DPDT 1.113 kΩ Plug In 5A - - - Plug In - - - 2
RS Stock No. 488-1831
Mfr. Part No.MY4IN 24DC (S)
BrandOmron
£8.16
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24V dc - 4PDT 636 Ω Plug In 5A - - - Plug In - - - -
RS Stock No. 353-837
Mfr. Part No.G2R-1-SN 24DC(S)
BrandOmron
£6.09
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24V dc 530mW SPDT 1.1 kΩ Plug In 10A 5kV ac - - Plug In 380V ac 125V dc - 1
RS Stock No. 488-2575
Mfr. Part No.MY4 24DC (S)
BrandOmron
£7.42
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24V dc 900mW 4PDT 636 Ω Plug In 3A 2kV - - Plug In 250V ac 30V dc - 4
RS Stock No. 329-7308
Mfr. Part No.G2R-2-SNDI 24DC(S)
BrandOmron
£9.08
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24V dc 530mW DPDT 1.113 kΩ Plug In 5A 5kV - - PCB Pin 250V ac 30V dc - -
RS Stock No. 548-4245
Mfr. Part No.MY2IN 24DC (S)
BrandOmron
£6.28
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24V dc 900mW DPDT 636 Ω Plug In 10A 2kV - - Plug In 250V ac 30V dc - 2
RS Stock No. 488-1869
Mfr. Part No.MY4N-D2 24DC(S)
BrandOmron
£12.81
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24V dc 900mW 4PDT 636 Ω Plug In 5A 2kV - - Plug In 250V ac 30V dc - 4
RS Stock No. 329-7241
Mfr. Part No.G2R-2-SNI 24DC(S)
BrandOmron
£7.11
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24V dc 530mW DPDT 1.113 kΩ Plug In 5A 5kV - - PCB Pin 250V ac 30V dc - -
RS Stock No. 488-1904
Mfr. Part No.MY2 AC220/240(S)
BrandOmron
£6.05
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240V ac 1.1W DPDT 18.79 kΩ Plug In 10A 2kV - - Plug In 250V ac 30V dc - 2
RS Stock No. 329-7229
Mfr. Part No.G2R-1-SNDI 24DC(S)
BrandOmron
£8.36
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24V dc 530mW SPDT 1.1 kΩ Plug In 10A 5kV ac - - Through Hole 380V ac 125V dc - -
RS Stock No. 488-1780
Mfr. Part No.MY4IN 24AC (S)
BrandOmron
£8.16
Each
Units
24V ac 1.2W 4PDT 180 Ω Plug In 5A 2kV - - Plug In 250V ac 30V dc - 4
RS Stock No. 488-1774
Mfr. Part No.MY4 AC220/240(S)
BrandOmron
£8.00
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240V ac 1.1W 4PDT 18.79 kΩ Plug In 5A 2kV - - Plug In 250V ac 30V dc - 4
RS Stock No. 366-338
Mfr. Part No.G2R-2 24DC
BrandOmron
£4.64
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24V dc - DPDT 1.1 kΩ PCB Mount 5A - - - Through Hole - - - -
RS Stock No. 394-9071
Mfr. Part No.MY4 DC24
BrandOmron
£5.75
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24V dc 900mW 4PDT 636 Ω Plug In 5A 2kV ac - - Through Hole 250V ac 125V dc - -
RS Stock No. 536-883
Mfr. Part No.MKS2PIAC230
BrandOmron
£8.17
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230V ac - DPDT 4.25 kΩ Plug In 10A - - - Plug In 250V ac 250V dc - 2
RS Stock No. 488-1819
Mfr. Part No.MY4IN AC220/240(S)
BrandOmron
£8.87
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240V ac 1.1W 4PDT 18.79 kΩ Plug In 5A 2kV - - Plug In 250V ac 30V dc - 4
RS Stock No. 548-010
Mfr. Part No.G7S-4A2B-E DC24
BrandOmron
£32.14
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Mfr. Part No.G2RV-1-S DC21
BrandOmron
£9.54
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21V dc - SPDT - Plug In 6A - - - Plug In - - - -
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Mfr. Part No.G2R-2-SND 24DC(S)
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24V dc 300mW DPDT - Plug In 6A 4kV ac - - Plug In 440V ac 125V dc - -