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 Terminal Type Series Maximum Switching Voltage AC Maximum Switching Voltage DC Application Number of Poles Length
RS庫存編號 329-806
製造零件編號LY2 24AC
BrandOmron
HK$141.74
單位
24 V - DPDT 180 Ω Plug In 10A - Quick Connect LY2 - - - 2 28mm
RS庫存編號 136-5225
製造零件編號G2R-1 24DC
BrandOmron
HK$29.67
Each (In a Tray of 100)
單位
24 V dc - SPDT 1.1 kΩ PCB Mount 10A - Through Hole G2R-1 - - - - 29mm
RS庫存編號 366-265
製造零件編號G2R-1 24DC
BrandOmron
HK$32.53
單位
24 V dc - SPDT 1.1 kΩ PCB Mount 10A - Through Hole G2R-1 - - - - 29mm
RS庫存編號 366-338
製造零件編號G2R-2 24DC
BrandOmron
HK$41.33
單位
24 V dc - DPDT 1.1 kΩ PCB Mount 5A - Through Hole G2R-2 - - - - 29mm
RS庫存編號 794-8164
製造零件編號MY4IN 100/110DC(S)
BrandOmron
HK$99.41
單位
100/110 V dc 900mW 4PDT 11.1 kΩ Plug In 5A 2kV ac Plug In MY4 250V 125V - - 36mm
RS庫存編號 353-887
製造零件編號G2R-2-SN 24DC(S)
BrandOmron
HK$78.17
單位
24 V dc - DPDT 1.113 kΩ Plug In 5A - Plug In G2R-2 - - - 2 29mm
RS庫存編號 353-821
製造零件編號G2R-1-SN 12DC(S)
BrandOmron
HK$68.30
單位
12 V dc 530mW SPDT 275 Ω Plug In 10A 5kV ac Plug In G2R-1 380V ac 125V dc - 1 29mm
RS庫存編號 365-0585
製造零件編號G2RL-2 12DC
BrandOmron
HK$40.60
單位
12 V dc - DPDT 360 Ω PCB Mount 8A - Through Hole G2RL - - - - 29mm
RS庫存編號 237-5356
製造零件編號G5V-2-H1-24VDC
BrandOmron
HK$26.53
單位
24 V dc - DPDT 2.88 kΩ PCB Mount 1A - Through Hole G5V - - - 2 20.5mm
RS庫存編號 803-310
製造零件編號MY2K AC24
BrandOmron
HK$254.88
單位
24 V ac - DPDT 320 (Set Coil) Ω, 550 (Reset Coil) Ω Plug In 3 A - PCB Pin - 250V ac 125V dc General Purpose - 28mm
RS庫存編號 366-300
製造零件編號G2R-1-E 24DC
BrandOmron
HK$43.18
單位
24 V dc - SPDT 1.1 kΩ PCB Mount 16A - Through Hole G2R-1 - - - - 29mm
RS庫存編號 841-1420
製造零件編號G5V-1-DC5
BrandOmron
HK$16.69
單位
5 V dc 150mW SPDT 167 Ω PCB Mount 1A 1kV ac PCB Pin G5V 125V 60V - - 12.5mm
RS庫存編號 683-9087
製造零件編號G4W-2212P-US-TV5 24DC
BrandOmron
HK$49.31
單位
24 V dc - DPNO 720 Ω PCB Mount 10A - Through Hole G4W - - - - 30.5mm
RS庫存編號 369-501
製造零件編號G5V-2 12DC
BrandOmron
HK$20.68
單位
12 V dc - DPDT 288 Ω PCB Mount 2A - Through Hole G5V - - - - 20.5mm
RS庫存編號 827-7835
製造零件編號LY4-0-DC24
BrandOmron
HK$164.96
單位
24 V dc 1.5W 4PDT 350 Ω PCB Mount 10A 2kV ac PCB Pin LY4 250V 125V - - 21.5mm
RS庫存編號 366-293
製造零件編號G2R-1-E 12DC
BrandOmron
HK$31.77
單位
12 V dc - SPDT 275 Ω PCB Mount 16A - Through Hole G2R-1 - - - - 29mm
RS庫存編號 329-7229
製造零件編號G2R-1-SNDI 24DC(S)
BrandOmron
HK$93.69
單位
24 V dc 530mW SPDT 1.1 kΩ Plug In 10A 5kV ac Through Hole G2R 380V ac 125V dc - - 29mm
RS庫存編號 789-7533
製造零件編號G6C2117PUS24DC
BrandOmron
HK$72.58
單位
24 V dc 200mW SPDT 2.88 kΩ PCB Mount 8A 2kV ac Through Hole G6C 380V 125V - - 20mm
RS庫存編號 807-4197
製造零件編號G2R1DC24BYOMI
BrandOmron
HK$44.39
單位
24 V dc 530mW SPDT 1.1 kΩ PCB Mount 10A - Plug In G2R 380V 125V - - 29mm
RS庫存編號 329-840
製造零件編號LY4 24DC
BrandOmron
HK$216.44
單位
24 V dc - 4PDT 350 Ω Plug In 10A - Quick Connect LY4 - - - 4 28mm