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 Maximum Switching Current AC Terminal Type Series Maximum Switching Voltage AC Maximum Switching Voltage DC Application Number of Poles
RS庫存編號 842-3628
製造零件編號C3-A30DX/240VDC
BrandTurck
HK$275.00
單位
240 V dc 1.3W 3PDT - Plug In 10A 2.5kV - Plug In C3-A30 250V 220V - -
RS庫存編號 842-3798
製造零件編號C7-A20DX/024VDC
BrandTurck
HK$214.08
單位
24 V dc 1W DPDT 594 Ω Plug In 10A 2.5kV - Plug In C7-A20 250V 220V - -
RS庫存編號 842-3414
製造零件編號C10-A10BX/024UC
BrandTurck
HK$119.92
單位
24 V ac 1.1W SPDT 290 Ω Plug In 10A 5kV - Plug In C10-A10 250V 220V - -
RS庫存編號 842-3436
製造零件編號C10-A10X/005VDC
BrandTurck
HK$117.55
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5 V dc 700mW SPDT - Plug In 10A 5kV - Plug In C10-A10 250V 220V - -
RS庫存編號 842-3442
製造零件編號C10-A10X/024VAC
BrandTurck
HK$132.29
單位
24 V ac 1.1W SPDT 290 Ω Plug In 10A 5kV - Plug In C10-A10 250V 220V - -
RS庫存編號 842-3445
製造零件編號C10-A10X/012VAC
BrandTurck
HK$133.11
單位
12 V ac 1.1W SPDT - Plug In 10A 5kV - Plug In C10-A10 250V 220V - -
RS庫存編號 842-3622
製造零件編號C3-A30FX/024VDC
BrandTurck
HK$314.80
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24 V dc 1.3W 3PDT 433 Ω Plug In 10A 2.5kV - Plug In C3-A30 250V 220V - -
RS庫存編號 842-3776
製造零件編號C5-A30X/012VDC
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HK$182.71
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12 V dc 1.4W 3PDT - Plug In 16A 4kV - Plug In C5-A30 250V 220V - -
RS庫存編號 842-3836
製造零件編號C9-A41X/024VAC
BrandTurck
HK$166.82
單位
24 V ac 1.2W 4PDT 174 Ω Plug In 5A 2.5kV - Plug In C9-A41 250V 110V - 4
RS庫存編號 842-3694
製造零件編號C3-T31X/024VDC
BrandTurck
HK$262.37
單位
24 V dc 1.3W 3PDT 443 Ω Plug In 6A 2.5kV - Plug In C3-T31 250V 30V - -
RS庫存編號 842-3509
製造零件編號C2-A20DX/024VDC
BrandTurck
HK$206.27
單位
24 V dc 1.3W DPDT 433 Ω Plug In 10A 2.5kV - Plug In C2-A20 250V 220V - -
RS庫存編號 842-3849
製造零件編號C9-A41X/240VAC
BrandTurck
HK$206.37
單位
240 V ac 1.2W 4PDT 18.6 kΩ Plug In 5A 2.5kV - Plug In C9-A41 250V 110V - 4
RS庫存編號 842-3600
製造零件編號C3-A30/024VDC
BrandTurck
HK$206.27
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24 V dc 1.3W 3PDT 433 Ω Plug In 10A 2.5kV - Plug In C3-A30 250V 220V - -
RS庫存編號 842-3470
製造零件編號C2-A20/024VDC
BrandTurck
HK$172.78
單位
24 V dc 1.3W DPDT 433 Ω Plug In 10A 2.5kV - Plug In C2-A20 250V 220V - -
RS庫存編號 842-3631
製造零件編號C3-A30FX/048VDC
BrandTurck
HK$259.08
單位
48 V dc 1.3W 3PDT 1.8 kΩ Plug In 10A 2.5kV - Plug In C3-A30 250V 220V - -
RS庫存編號 842-3818
製造零件編號C7-T21DX/024VDC
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HK$178.86
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24 V dc 1W DPDT 594 Ω Plug In 6A 2.5kV - Plug In C7-T21 250V 30V - -
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HK$195.13
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24 V dc 1W 4PDT 594 Ω Plug In 5A 2.5kV - Plug In C9-A41 250V 110V - 4
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製造零件編號C4-A40X/120-125VDC
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HK$255.14
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125 V dc 1.4W 4PDT - Plug In 6A 2.5kV - Plug In C4-A40 250V 220V - -
RS庫存編號 842-3537
製造零件編號C2-A20FX/120-125VDC
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HK$223.24
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125 V dc 1.3W DPDT 9.2 kΩ Plug In 10A 2.5kV - Plug In C2-A20 250V 220V - -