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 Terminal Type Series Maximum Switching Voltage AC Maximum Switching Voltage DC Application Number of Poles
RS Stock No. 683-9346
Mfr. Part No.G6B-1114P-US 24DC
BrandOmron
MYR18.12
Each
units
24 V dc 200mW SPNO 2.88 kΩ PCB Mount 5A 3kV ac - Through Hole G6B - - - -
RS Stock No. 488-1982
Mfr. Part No.MY2N-D2 24DC(S)
BrandOmron
MYR58.66
Each
units
24 V dc 900mW DPDT 636 Ω Plug In 10A 2kV - Plug In MY 250V ac 30V dc - 2
RS Stock No. 235-5475
Mfr. Part No.T92P7D22-24 7-1393211-1
MYR80.10
Each
units
24 V dc - DPNO 350 Ω Flange Mount 30A - - Quick Connect T92 - - - -
RS Stock No. 782-6979
Mfr. Part No.KUEP-3D15-48
MYR149.76
Each
units
48 V dc - SPNO - Plug In - - - Quick Connect KUEP - - - -
RS Stock No. 135-4698
Mfr. Part No.V23092A1012A301
MYR34.642
Each (In a Tube of 20)
units
12 V dc - SPDT 848 Ω PCB Mount 6A - - Through Hole - - - - -
RS Stock No. 790-3303
Mfr. Part No.A-5W-K
BrandFujitsu
MYR19.20
Each
units
5 V dc 140mW DPDT 178 Ω PCB Mount 2A 1.5kV - PCB Pin - 125V ac 110V dc - -
RS Stock No. 353-837
Mfr. Part No.G2R-1-SN 24DC(S)
BrandOmron
MYR35.24
Each
units
24 V dc 530mW SPDT 1.1 kΩ Plug In 10A 5kV ac - Plug In G2R-1 380V ac 125V dc - 1
RS Stock No. 369-517
Mfr. Part No.G5V-2 24DC
BrandOmron
MYR17.75
Each
units
24 V dc - DPDT 1.152 kΩ PCB Mount 2A - - Through Hole G5V - - - -
RS Stock No. 488-1831
Mfr. Part No.MY4IN 24DC (S)
BrandOmron
MYR65.14
Each
units
24 V dc - 4PDT 636 Ω Plug In 5A - - Plug In MY4 - - - -
RS Stock No. 231-2377
Mfr. Part No.V23092A1012A301
MYR30.54
Each
units
12 V dc - SPDT 848 Ω PCB Mount 6A - - Through Hole SNR - - - -
RS Stock No. 366-300
Mfr. Part No.G2R-1-E 24DC
BrandOmron
MYR26.61
Each
units
24 V dc - SPDT 1.1 kΩ PCB Mount 16A - - Through Hole G2R-1 - - - -
RS Stock No. 376-818
Mfr. Part No.40.52.8.110.0000
BrandFinder
MYR29.08
Each
units
110 V ac 1.2W DPDT 6.9 kΩ PCB Mount 8A 6kV - Through Hole 40 Series 400V ac - - 2
RS Stock No. 135-5119
Mfr. Part No.RT424024 6-1393243-8
MYR14.669
Each (In a Box of 20)
units
24 V dc - DPDT 1.44 kΩ PCB Mount 8A - - Through Hole - - - - -
RS Stock No. 719-6252
Mfr. Part No.T92S7D12-12
MYR72.51
Each
units
12 V dc 1.7W DPST 86 Ω PCB Mount 30A 4kV rms - Through Hole T92 600V ac - - -
RS Stock No. 680-3849
Mfr. Part No.RT424024 6-1393243-8
MYR14.67
Each
units
24 V dc - DPDT 1.44 kΩ PCB Mount 8A - - Through Hole RT2 - - - -
RS Stock No. 385-935
Mfr. Part No.55.34.8.024.0040
BrandFinder
MYR45.62
Each
units
24 V ac 1W 4PDT 190 Ω Plug In 7A - - Quick Connect 55 Series 400V ac - - 4
RS Stock No. 173-8159
Mfr. Part No.DS2E-S-DC24V
BrandPanasonic
MYR16.304
Each (In a Box of 50)
units
24 V dc 200mW DPDT 2.88 k PCB Mount 3A 1.5kV rms - Through Hole - - - - -
RS Stock No. 422-7029
Mfr. Part No.IM03TS 1-1462037-8
MYR10.02
Each
units
5 V dc - DPDT 178 Ω PCB Mount 2A - - Through Hole IM - - - -
RS Stock No. 680-3739
Mfr. Part No.RT314012 9-1393239-5
MYR14.16
Each
units
12 V dc - SPDT 360 Ω PCB Mount 16A - - Through Hole RT1 - - - -
RS Stock No. 536-922
Mfr. Part No.MKS2PI DC24
BrandOmron
MYR45.74
Each
units
24 V dc - DPDT 430 Ω Plug In 10A - - Plug In MKS 250V ac 250V dc - 2
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