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. 488-1869
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.MY4N-D2 24DC(S)
Brand :Omron
THB612.22
Each
Units
24V dc 900mW 4PDT 636 Ω Plug In 5A 2kV Plug In MY4 250V ac 30V dc - 4 28mm
RS Stock No. 508-0023
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.2961192
THB293.49
Each
Units
24V dc - DPDT 1.44 kΩ PCB Mount 8A - Through Hole REL-MR- 24DC/21-21 - - - - 29mm
RS Stock No. 718-1822
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.1-1393222-5
THB176.42
Each
Units
9V dc 220mW SPNO 364 Ω PCB Mount 8A 4kV rms Through Hole MSR 400V ac - - - 28.6mm
RS Stock No. 488-1960
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.MY2N 24DC(S)
Brand :Omron
THB282.99
Each
Units
24V dc 900mW DPDT 636 Ω Plug In 10A 2kV Plug In MY 250V ac 30V dc - 2 28mm
RS Stock No. 135-4660
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.RT314024 9-1393239-8
THB84.143
Each (In a Box of 20)
Units
24V dc - SPDT 1.44 kΩ PCB Mount 16A - Through Hole - - - - - 29mm
RS Stock No. 161-4086
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.1-1393222-5
THB169.004
Each (In a Tube of 20)
Units
9V dc 220mW SPNO 364 Ω PCB Mount 8A 4kV rms Through Hole - 400V ac - - - 28.6mm
RS Stock No. 189-4109
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.RT314024 9-1393239-8
THB92.89
Each
Units
24V dc - SPDT 1.44 kΩ PCB Mount 16A - Through Hole RT3 - - - - 29mm
RS Stock No. 619-4381
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.V23086C2001A403 1413009-9
THB289.95
Each
Units
12V dc - DPDT 181 Ω PCB Mount - - Through Hole K - - - - 23.6mm
RS Stock No. 488-1904
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.MY2 AC220/240(S)
Brand :Omron
THB290.87
Each
Units
240V ac 1.1W DPDT 18.79 kΩ Plug In 10A 2kV Plug In MY 250V ac 30V dc - 2 28mm
RS Stock No. 811-3139
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.DSP1-DC12V-F
Brand :Panasonic
THB262.83
Each
Units
12V dc 300mW SPDT 480 Ω PCB Mount 5A 3kV rms - - 250V 125V - - 20.2mm
RS Stock No. 173-9223
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.DSP1-DC12V-F
Brand :Panasonic
THB205.605
Each (In a Box of 50)
Units
12V dc 300mW SPDT 480 Ω PCB Mount 5A 3kV rms - - 250V 125V - - 20.2mm
RS Stock No. 758-6905
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.LZX:PT570730
Brand :Siemens
THB326.66
Each
Units
230V ac - 4PDT - Plug In 6A - Screw LZX 230V 24V - - 22.5mm
RS Stock No. 827-8387
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.MY4ZN-D2-DC24(S)
Brand :Omron
THB857.18
Each
Units
24V dc 900mW 4PDT 636 Ω Plug In 5A 2kV ac PCB Pin MY4 250V 125V - - 21.5mm
RS Stock No. 351-588
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.40.52.7.024.0000
Brand :Finder
THB190.43
Each
Units
24V dc 500mW DPDT 1.2 kΩ PCB Mount 8A 6kV Through Hole 40 Series 400V ac - - 2 29mm
RS Stock No. 200-2020
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.G4A-1A-E DC12
Brand :Omron
THB274.40
Each
Units
12V dc - SPNO 160 Ω Plug In 20A - Through Hole G4A - - - 1 30.5mm
RS Stock No. 198-6911
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.RTE24024 1-1393243-0
THB100.56
Each
Units
24V dc - DPDT 1.44 kΩ PCB Mount 8A - Through Hole RT1 - - - - 29mm
RS Stock No. 814-8175
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.750XBXH-24D
THB3,512.82
Each
Units
24V dc 1.2W DPDT 470 Ω Plug In 12A 1.5kV rms Plug In - 300V - - - 40.9mm
RS Stock No. 135-4666
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.RTE24024
THB95.788
Each (In a Box of 20)
Units
24V dc - DPDT 1.44 kΩ PCB Mount 8A - Through Hole - - - - - 29mm
RS Stock No. 350-686
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.60.13.9.024.0040
Brand :Finder
THB603.45
Each
Units
24V dc 1.3W 3PDT 445 Ω Plug In 10A - PCB Pin 60 Series 400V ac - - - 32.5mm
RS Stock No. 794-8182
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.MY4N 220/240AC(S)
Brand :Omron
THB349.54
Each
Units
240V ac 1.1W 4PDT 18.79 kΩ Plug In 5A 2kV ac Plug In MY4 250V 125V - - 36mm
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