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
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MYR10.02
Each
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MYR9,577.31
1 Tube of 1000
Tube(s)
5 V dc - DPDT 178 Ω PCB Mount 2A - - Through Hole - - - - -
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Mfr. Part No.MT323024 8-1393091-4
MYR76.27
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24 V dc 1.2W 3PDT 475 Ω Plug In 10A 2.5kV rms - Plug In MT - - - -
RS Stock No. 909-7955
Mfr. Part No.1393315-2
MYR190.95
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12 V dc 3.9W SPNO 37 Ω Flange Mount 300A - - Screw HCR 150 - - - 1
RS Stock No. 536-922
Mfr. Part No.MKS2PI DC24
BrandOmron
MYR45.74
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24 V dc - DPDT 430 Ω Plug In 10A - - Plug In MKS 250V ac 250V dc - 2
RS Stock No. 805-2217
Mfr. Part No.R15-2012-23-5230-WTL
BrandRelpol
MYR38.89
Each
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230 V ac 2.8W DPDT 7.08 kΩ Plug In 10A 2.5kV ac - Plug In R15 440V 24V - -
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Mfr. Part No.RT314012
MYR16.52
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12 V dc - SPDT 360 Ω PCB Mount 16A - - Through Hole - - - - -
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Mfr. Part No.55.34.8.024.0040
BrandFinder
MYR45.62
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24 V ac 1W 4PDT 190 Ω Plug In 7A - - Quick Connect 55 Series 400V ac - - 4
RS Stock No. 815-5117
Mfr. Part No.JS1-12V-F
BrandPanasonic
MYR7.80
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12 V dc 360mW SPDT 400 Ω PCB Mount 5A 1.5kV rms - PCB Pin - 250V 100V - -
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Mfr. Part No.1393315-2
MYR242.139
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12 V dc 3.9W SPNO 37 Ω Flange Mount 300A - - Screw - - - - 1
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MYR14.16
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12 V dc - SPDT 360 Ω PCB Mount 16A - - Through Hole RT1 - - - -
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MYR35.16
Each
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24 V dc 900mW 4PDT 650 Ω Plug In 8A - - Plug In RXM 250V - - 4
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Mfr. Part No.1432772-1
MYR15.46
Each
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12 V dc - SPST - Panel Mount - - - - VF4 - 14V dc - -
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Mfr. Part No.RT334012
MYR17.84
Each
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12 V dc - SPNO 360 Ω PCB Mount 16A - - Through Hole RT1 - - - -
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Mfr. Part No.RT334012
MYR10.945
Each (In a Box of 500)
units
12 V dc - SPNO 360 Ω PCB Mount 16A - - Through Hole - - - - -
RS Stock No. 123-2074
Mfr. Part No.R15-2013-23-1024-WTL
BrandRelpol
MYR39.77
Each
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24 V dc 1.5W 3PDT 430 Ω Plug In 10A 2.5kV ac - Plug In R15 440V 24V - 3
RS Stock No. 811-3163
Mfr. Part No.JW2ASN-DC24V
BrandPanasonic
MYR10.19
Each
units
24 V dc 530mW DPNO 1.1 kΩ PCB Mount 5A 5kV rms - - - 250V 30V - -
RS Stock No. 173-9225
Mfr. Part No.JW2ASN-DC24V
BrandPanasonic
MYR16.731
Each (In a Box of 100)
units
24 V dc 530mW DPNO 1.1 kΩ PCB Mount 5A 5kV rms - - - 250V 30V - -
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Mfr. Part No.46.61.9.024.0040
BrandFinder
MYR29.31
Each
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24 V dc 500mW SPDT 1.2 kΩ Plug In 16A 6kV - Quick Connect 46 Series 250V ac - - 1
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24 V dc 290mW DPNO 2.2 kΩ PCB Mount 500mA 1kV ac - PCB Pin - 120V 100V - -
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