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. 814-8175
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.750XBXH-24D
THB3,512.82
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24V dc 1.2W DPDT 470 Ω Plug In 12A 1.5kV rms Plug In - 300V - - - 40.9mm
RS Stock No. 884-1313
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.RXM4AB2BD
THB329.36
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24V dc 900mW 4PDT 650 Ω Plug In 8A - Plug In RXM 250V - - 4 21mm
RS Stock No. 884-1272
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.RXM2AB1P7
THB213.70
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230V ac 1.2W DPDT 15 kΩ Plug In 12A - Plug In - 250V - - 2 21mm
RS Stock No. 884-1537
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THB241.89
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120V ac 1.2W 4PDT 3.63 kΩ Plug In 8A - Plug In - 250V - - 4 21mm
RS Stock No. 293-5217
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.RHN411M
THB2,260.96
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220V ac 4.5W 4PDT 4.356 kΩ - 5A 2.5kV Through Hole - - - - - 54mm
RS Stock No. 884-1278
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.RXM2AB2BD
THB250.19
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24V dc 900mW DPDT 650 Ω Plug In 12A - Plug In - 250V - - 2 21mm
RS Stock No. 884-1304
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THB232.80
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230V ac 1.2W 4PDT 15 kΩ Plug In 8A - Plug In - 250V - - 4 21mm
RS Stock No. 884-1329
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THB271.71
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120V ac 1.2W 4PDT 3.63 kΩ Plug In 8A - Plug In - 250V - - 4 21mm
RS Stock No. 884-1294
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THB303.75
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24V ac 1.2W 4PDT 180 Ω Plug In 8A - Plug In - 250V - - 4 21mm
RS Stock No. 884-1430
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THB246.50
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48V ac 1.2W DPDT 710 Ω Plug In 12A - Plug In - 250V - - 2 21mm
RS Stock No. 827-8582
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THB707.16
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240V ac 3.5W DPDT 7.2 kΩ Flange Mount 13A 2kV ac Quick Connect - 600V 28V - - 38.89mm
RS Stock No. 293-5172
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.RHN412B
THB1,710.81
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24V dc 1.6W 4PDT 43.4 Ω Plug In 5A 2.5kV Through Hole - - - - - 54mm
RS Stock No. 814-8359
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.782XDXH10-24D
THB2,807.57
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24V dc 1.2W 4PDT 650 Ω Plug In 3A 1.24kV rms Screw - 300V - - - 29.36mm
RS Stock No. 828-3095
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THB206.737
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220V ac 750mW SPDT 35.5 kΩ Plug In 12A 5kV ac Plug In - 400V 300V - - 29mm
RS Stock No. 884-1458
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THB201.78
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230V ac 1.2W DPDT 15 kΩ Plug In 12A - Plug In - 250V - - 2 21mm
RS Stock No. 884-1610
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.RXM4GB2BD
THB327.50
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24V dc 900mW 4PDT 650 Ω Plug In 3A - Plug In - 250V - - 4 21mm
RS Stock No. 884-1418
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THB207.52
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48V ac 1.2W DPDT 710 Ω Plug In 12A - Plug In - 250V - - 2 21mm
RS Stock No. 884-1559
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THB465.27
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110V dc 900mW 4PDT 13.44 kΩ Plug In 8A - Plug In - 250V - - 4 21mm
RS Stock No. 884-1509
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THB313.69
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24V dc 900mW 3PDT 650 Ω Plug In 10A - Plug In - 250V - - 3 21mm
RS Stock No. 884-1525
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THB282.73
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48V ac 1.2W 4PDT 710 Ω Plug In 8A - Plug In - 250V - - 4 21mm