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 Terminal Type Series Maximum Switching Voltage AC Maximum Switching Voltage DC Application Number of Poles Length
RS Stock No. 2508330466
Mfr. Part No.R25-11D10-5/6
MYR36.06
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RS Stock No. 2508384769
Mfr. Part No.I1C-20BK
BrandAltech
MYR16.41
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RS Stock No. 2509191464
Mfr. Part No.R51-5D40-12
MYR36.12
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RS Stock No. 2508329321
Mfr. Part No.R12-17D3-12
MYR65.41
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RS Stock No. 2508948067
Mfr. Part No.219FXXP-120A
BrandMagnecraft
MYR618.58
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RS Stock No. 2509037398
Mfr. Part No.G6K-2P DC24
BrandOmron
MYR16.58
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RS Stock No. 2508948039
Mfr. Part No.219XBXP-120A
BrandMagnecraft
MYR398.89
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RS Stock No. 2508632330
Mfr. Part No.AZ2100-1A-12DE
MYR12.04
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RS Stock No. 2508632734
Mfr. Part No.AZ8222-2C-12DSE
MYR8.18
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RS Stock No. 2508806086
Mfr. Part No.G5V-2-H1-DC48
BrandOmron
MYR20.27
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RS Stock No. 2508948017
Mfr. Part No.219XBXP-24D
BrandMagnecraft
MYR543.98
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RS Stock No. 2508948089
Mfr. Part No.219ABAP-125D
BrandMagnecraft
MYR559.55
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Mfr. Part No.219BBXPLM-120A
BrandMagnecraft
MYR486.25
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Mfr. Part No.G5V-2-H1-DC24
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MYR12.26
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