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 Series Maximum Switching Voltage AC Maximum Switching Voltage DC Application
RS Stock No. 888-6880
BrandRS PRO
kr 100,904
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Units
24V ac/dc - SPDT - DIN Rail 6A - - - Push In - 250V 250V -
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kr 99,884
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24V dc - SPDT - DIN Rail 6A - - - Screw - 250V 250V -
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kr 20,00
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12V dc 360mW SPDT 400 Ω PCB Mount 10A 2kV ac - - Through Hole - 277V ac 30V dc -
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kr 99,84
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230V ac 2W DPDT 8.2 kΩ Plug In 10A 1.5kV ac - - Through Hole - 240V 30V -
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BrandRS PRO
kr 98,67
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12V dc 180W 4PDT - Plug In 6A 2kV ac - - Plug In - 250V ac 30V dc -
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BrandRS PRO
kr 20,00
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6V dc 360mW SPDT 100 Ω PCB Mount 10A 2kV ac - - Through Hole - 277V ac 30V dc -
RS Stock No. 800-4491
BrandRS PRO
kr 26,53
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48V dc 530mW DPDT 4.17 kΩ PCB Mount 10A 5kV ac - - Through Hole - 250V ac 30V dc -
RS Stock No. 888-6815
BrandRS PRO
kr 106,864
Each (In a Pack of 5)
Units
24V ac/dc - SPDT - DIN Rail 6A - - - Screw - 250V 250V -
RS Stock No. 121-7812
BrandRS PRO
kr 83,77
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24V ac 300W DPDT - Plug In 10A 2kV ac - - Plug In - 250V ac 30V dc -
RS Stock No. 888-6837
BrandRS PRO
kr 133,262
Each (In a Pack of 5)
Units
230V ac/dc - SPDT - DIN Rail 6A - - - Screw - 250V 250V -
RS Stock No. 888-6818
BrandRS PRO
kr 106,864
Each (In a Pack of 5)
Units
24V ac/dc - SPDT - DIN Rail 6A - - - Screw - 250V 250V -
RS Stock No. 800-4463
BrandRS PRO
kr 31,20
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24V ac 750mW DPDT 350 Ω PCB Mount 8A 5kV ac - - Through Hole - 440V ac 300V dc -
RS Stock No. 800-4514
BrandRS PRO
kr 21,53
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24V 200mW DPDT 2.88 kΩ PCB Mount 3A 1.5kV ac - - Through Hole - 250V ac 220V dc -
RS Stock No. 121-7810
BrandRS PRO
kr 85,67
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12V dc 300W DPDT - Plug In 10A 2kV ac - - Plug In - 250V ac 30V dc -
RS Stock No. 348-784
BrandRS PRO
kr 93,07
Each
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24V dc 1.2W DPDT 478 Ω Plug In 10A 1.5kV ac - - Through Hole - 240V 30V -
RS Stock No. 888-6871
BrandRS PRO
kr 108,832
Each (In a Pack of 5)
Units
24V dc - SPDT - DIN Rail 6A - - - Push In - 250V 250V -
RS Stock No. 121-7822
BrandRS PRO
kr 149,13
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24V ac 300W 4PDT - Plug In 10A 2kV ac - - Plug In - 250V ac 30V dc -
RS Stock No. 888-6802
BrandRS PRO
kr 101,554
Each (In a Pack of 5)
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24V dc - SPDT - DIN Rail 6A - - - Screw - 250V 250V -
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BrandRS PRO
kr 75,346
Each (In a Pack of 5)
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115V ac/dc - SPDT - DIN Rail 6A - - - Push In - 250V 250V -
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BrandRS PRO
kr 77,73
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240V ac 480W SPDT - Plug In 16A 2kV ac - - Plug In - 250V ac 30V dc -
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