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 Terminal Type Series Maximum Switching Voltage AC Maximum Switching Voltage DC Application Number of Poles Length
RS Stock No. 123-2076
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.R4N-2014-23-1024-WTL
Brand :Relpol
THB190.01
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24V dc 900mW 4PDT 640 Ω Plug In 6A 2.5kV ac Plug In R4N 250V 24V - 4 27.4mm
RS Stock No. 805-2150
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.R2N-2012-23-1024-WTL
Brand :Relpol
THB246.10
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24V dc 900mW DPDT 640 Ω Plug In 12A 2.5kV ac Plug In R2N 440V 24V - - 21.2mm
RS Stock No. 123-2096
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.RY2-1012-26-5024
Brand :Relpol
THB501.44
Each
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24V ac 1.6W DPDT 158 Ω Plug In 12A 2.5kV ac Plug In RY2 440V 30V - 2 27.5mm
RS Stock No. 123-2077
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.R4N-2014-23-5024-WTL
Brand :Relpol
THB190.01
Each
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24V ac 1.6W 4PDT 158 Ω Plug In 6A 2.5kV ac Plug In R4N 250V 24V - 4 27.4mm
RS Stock No. 805-2220
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.R15-2013-23-5230-WTL
Brand :Relpol
THB408.28
Each
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230V ac 2.8W 3PDT 7.08 kΩ Plug In 10A 2.5kV ac Plug In R15 440V 24V - - 35mm
RS Stock No. 805-2141
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.R2N-2012-23-1012-WTL
Brand :Relpol
THB246.10
Each
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12V dc 900mW DPDT 160 Ω Plug In 12A 2.5kV ac Plug In R2N 440V 24V - - 21.2mm
RS Stock No. 123-2090
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.RM87N-2011-35-1012
Brand :Relpol
THB178.98
Each
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12V dc 480mW SPDT 360 Ω PCB Mount 12A 5kV ac Plug In RM87 440V 24V - 1 29mm
RS Stock No. 134-8391
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.RM32N-3021-85-1012
Brand :Relpol
THB130.00
Each
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12V dc 450mW SPNO 320 Ω PCB Mount 5A 2.5kV ac PCB Pin - 277V 28V - 1 18.8mm
RS Stock No. 134-8401
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.RM50-3011-85-1024
Brand :Relpol
THB110.44
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24V dc 360mW SPDT 1.6 kΩ PCB Mount 15A 1kV ac PCB Pin - 240/277V ac 48V dc - 1 19mm
RS Stock No. 134-8393
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.RM40-2011-85-1005
Brand :Relpol
THB264.00
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5V dc 200mW SPDT 125 Ω PCB Mount 5A 4kV ac PCB Pin - 380V ac 48V dc - 1 20mm
RS Stock No. 123-2073
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.R15-2012-23-5110-WTL
Brand :Relpol
THB406.50
Each
Units
110V ac 2.8W DPDT - Plug In 10A 2.5kV ac Plug In R15 440V 24V - 2 35mm
RS Stock No. 123-2089
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.RM85-2011-35-5230
Brand :Relpol
THB276.52
Each
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230V ac 750mW SPDT 38.5 kΩ PCB Mount 16A 5kV ac Plug In RM85 440V 24V - 1 29mm
RS Stock No. 123-2095
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.RUC-1013-26-3024
Brand :Relpol
THB683.26
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24V ac 2.8W 3PDT - Plug In 16A 2.5kV ac Plug In RUC 440V 24V - 3 38.6mm
RS Stock No. 123-2094
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.RM87N-2011-35-5230
Brand :Relpol
THB276.52
Each
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230V ac 750mW SPDT 38.5 kΩ PCB Mount 12A 5kV ac Plug In RM87 440V 24V - 1 29mm
RS Stock No. 134-8387
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.RM12-3211-35-1024
Brand :Relpol
THB187.03
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24V dc 250mW - 2.3 kΩ PCB Mount 8A 5kV ac PCB Pin - 400V 24V - 1 28.5mm
RS Stock No. 134-8395
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.RM40-2011-85-1012
Brand :Relpol
THB264.00
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12V dc 200mW SPDT 720 Ω PCB Mount 5A 4kV ac PCB Pin - 380V ac 48V dc - 1 20mm
RS Stock No. 914-3982
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.RY2-1012-26-5230
Brand :Relpol
THB458.71
Each
Units
253V ac 1.6W DPDT, SPDT 16.1 kΩ DIN Rail - 2.5kV ac Faston - 440V 30V - 2 27.5mm
RS Stock No. 134-8394
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.RM40-2011-85-1009
Brand :Relpol
THB264.00
Each
Units
9V dc 200mW SPDT 405 Ω PCB Mount 5A 4kV ac PCB Pin - 380V ac 48V dc - 1 20mm
RS Stock No. 134-8404
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.RM50N-3011-85-1012
Brand :Relpol
THB106.00
Each
Units
12V dc 360mW - 400 Ω PCB Mount 12A 1.5kV ac PCB Pin - 277V 110V - 1 19.5mm
RS Stock No. 123-2079
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.RM84-2012-35-1012
Brand :Relpol
THB216.86
Each
Units
12V dc 480mW DPDT 360 Ω PCB Mount 8A 5kV ac Plug In RM84 440V 24V - 2 29mm