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. 173-9230
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BrandPanasonic
kr 41,675
Each (In a Box of 50)
Units
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Mfr. Part No.CB1-M-24V
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kr 52,54
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24 V dc 1.8W SPDT 320 Ω PCB Mount 20A 500V rms - - Quick Connect - - 14V -
RS Stock No. 173-8962
Mfr. Part No.SFN4D24
BrandPanasonic
kr 290,848
Each (In a Box of 10)
Units
24 V dc 420mW DPST, 4PNO 1.477 k PCB Mount 8A 5kV rms - - Through Hole - - - -
RS Stock No. 699-6178
Mfr. Part No.SFN4D24
BrandPanasonic
kr 277,86
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Units
24 V dc 420mW DPST, 4PNO 1.477 kΩ PCB Mount 8A 5kV rms - - Through Hole - - - -
RS Stock No. 173-9218
Mfr. Part No.CB1AH-P-12V
BrandPanasonic
kr 53,553
Each (In a Box of 50)
Units
12 V dc 1.4W SPST 103 PCB Mount 70A 500V rms - - Through Hole - - 14V -
RS Stock No. 811-3090
Mfr. Part No.CB1AH-P-12V
BrandPanasonic
kr 52,94
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12 V dc 1.4W SPST 103 Ω PCB Mount 70A 500V rms - - Through Hole - - 14V -
RS Stock No. 173-9251
Mfr. Part No.JS1A-5V-F
BrandPanasonic
kr 13,463
Each (In a Box of 100)
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5 V dc 360mW SPNO 69.4 PCB Mount 5A 1.5kV rms - - PCB Pin - 250V 100V -
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kr 13,86
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5 V dc 360mW SPNO 69.4 Ω PCB Mount 5A 1.5kV rms - - PCB Pin - 250V 100V -
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BrandPanasonic
kr 29,91
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Mfr. Part No.JSM1125
BrandPanasonic
kr 23,946
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12 V dc 640mW SPDT 225 Ω PCB Mount 15A 1.5kV - - Through Hole JSM - 16V dc -
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BrandPanasonic
kr 27,32
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5 V dc 200mW DPDT 125 Ω PCB Mount 2A 1kV rms - - PCB Pin - 250V 220V -
RS Stock No. 815-5054
Mfr. Part No.DSP1-DC24V-F
BrandPanasonic
kr 73,18
Each
Units
24 V dc 300mW DPST 1.92 kΩ PCB Mount 5A 3kV rms - - PCB Pin - 250V 125V -
RS Stock No. 815-5114
Mfr. Part No.JS1-5V-F
BrandPanasonic
kr 14,16
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Units
5 V dc 360mW SPDT 69.4 Ω PCB Mount 5A 1.5kV rms - - PCB Pin - 250V 100V -
RS Stock No. 173-9257
Mfr. Part No.JS1-5V-F
BrandPanasonic
kr 10,668
Each (In a Box of 100)
Units
5 V dc 360mW SPDT 69.4 Ω PCB Mount 5A 1.5kV rms - - PCB Pin - 250V 100V -
RS Stock No. 811-3189
Mfr. Part No.JTN1AS-PA-F-DC12V
BrandPanasonic
kr 35,79
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12 V dc 800mW SPNO 180 Ω PCB Mount 30A 2.5kV rms - - Through Hole - 277V - -
RS Stock No. 173-9229
Mfr. Part No.JTN1AS-PA-F-DC12V
BrandPanasonic
kr 35,697
Each (In a Box of 50)
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12 V dc 800mW SPNO 180 Ω PCB Mount 30A 2.5kV rms - - Through Hole - 277V - -
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Mfr. Part No.JS1-48V-F
BrandPanasonic
kr 18,94
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Units
48 V dc 360mW SPDT 6.4 kΩ PCB Mount 5A 1.5kV rms - - PCB Pin - 250V 100V -
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BrandPanasonic
kr 2 719,12
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BrandPanasonic
kr 18,713
Each (In a Box of 100)
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