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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รายละเอียดสินค้า / Description ราคา / 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. 123-2076
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.R4N-2014-23-1024-WTL
Brand :Relpol
THB154.83
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24 V dc 900mW 4PDT 640 Ω Plug In 6A 2.5kV ac - Plug In R4N 250V 24V - 4
RS Stock No. 805-2150
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THB227.99
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24 V dc 900mW DPDT 640 Ω Plug In 12A 2.5kV ac - Plug In R2N 440V 24V - -
RS Stock No. 123-2096
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THB501.44
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24 V ac 1.6W DPDT 158 Ω Plug In 12A 2.5kV ac - Plug In RY2 440V 30V - 2
RS Stock No. 805-2220
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Brand :Relpol
THB321.15
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230 V ac 2.8W 3PDT 7.08 kΩ Plug In 10A 2.5kV ac - Plug In R15 440V 24V - -
RS Stock No. 123-2077
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THB154.83
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24 V ac 1.6W 4PDT 158 Ω Plug In 6A 2.5kV ac - Plug In R4N 250V 24V - 4
RS Stock No. 134-8378
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Brand :Relpol
THB284.57
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48 V dc 400 → 480mW DPDT 5.7 kΩ PCB Mount 8A 5kV ac - PCB Pin - 440V 24V - 2
RS Stock No. 134-8379
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Brand :Relpol
THB346.84
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110 V dc 400 → 480mW DPDT 25.2 kΩ PCB Mount 8A 5kV ac - PCB Pin - 440V 24V - 2
RS Stock No. 134-8395
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Brand :Relpol
THB264.00
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12 V dc 200mW SPDT 720 Ω PCB Mount 5A 4kV ac - PCB Pin - 380V ac 48V dc - 1
RS Stock No. 134-8383
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THB294.75
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12 V dc 900mW - 160 Ω PCB Mount 40A 4kV ac - PCB Pin - 300V 110V - 1
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THB130.00
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12 V dc 450mW SPNO 320 Ω PCB Mount 5A 2.5kV ac - PCB Pin - 277V 28V - 1
RS Stock No. 123-2082
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.RM84-2012-35-5024
Brand :Relpol
THB191.06
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24 V ac 750mW DPDT 400 Ω PCB Mount 8A 5kV ac - Plug In RM84 440V 24V - 2
RS Stock No. 134-8405
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THB106.00
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24 V dc 360mW - 1.6 kΩ PCB Mount 12A 1.5kV ac - PCB Pin - 277V 110V - 1
RS Stock No. 123-2094
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.RM87N-2011-35-5230
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THB276.52
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230 V ac 750mW SPDT 38.5 kΩ PCB Mount 12A 5kV ac - Plug In RM87 440V 24V - 1
RS Stock No. 805-2210
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THB272.97
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12 V dc 1.5W 3PDT 110 Ω Plug In 10A 2.5kV ac - Plug In R15 440V 24V - -
RS Stock No. 134-8384
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THB303.28
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220 V ac 2W - 13.49 kΩ PCB Mount 40A 4kV ac - PCB Pin - 300V 110V - 1
RS Stock No. 805-2223
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THB348.73
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24 V ac 2.8W 3PDT 75 Ω Plug In 10A 2.5kV ac - Plug In R15 440V 24V - -
RS Stock No. 123-2085
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Brand :Relpol
THB167.62
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12 V dc 480mW SPDT 360 Ω PCB Mount 16A 5kV ac - Plug In RM85 440V 24V - 1
RS Stock No. 805-2169
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.R3N-2013-23-1012-WTL
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THB249.92
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12 V dc 900mW 3PDT 160 Ω Plug In 10A 2.5kV ac - Plug In R3N 440V 24V - -
RS Stock No. 134-8380
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THB229.88
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5 V dc 400 → 480mW - 60 Ω PCB Mount 16A 5kV ac - PCB Pin - 440V 24V - 1
RS Stock No. 805-2153
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Brand :Relpol
THB190.13
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24 V ac 1.6W DPDT 158 Ω Plug In 12A 2.5kV ac - Plug In R2N 440V 24V - -