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 Prix Coil Voltage Coil Power Contact Configuration Coil Resistance Mounting Type Switching Current Isolation Coil To Contact Maximum Switching Current AC Maximum Switching Current DC Terminal Type Series Maximum Switching Voltage AC Maximum Switching Voltage DC Application
N° de stock RS 758-6898
Référence fabricantLZX:PT270024
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7,72 €
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24 V dc - DPDT - Plug In 8A - - - Screw LZX 230V 24V -
N° de stock RS 758-6905
Référence fabricantLZX:PT570730
MarqueSiemens
8,95 €
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Unité
230 V ac - 4PDT - Plug In 6A - - - Screw LZX 230V 24V -
N° de stock RS 758-6908
Référence fabricantLZX:RT424024
MarqueSiemens
6,18 €
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24 V dc - - - Plug In 2.5A - - - Screw LZX 230V - -
N° de stock RS 622-0547
Référence fabricant5TT4202-0
MarqueSiemens
31,14 €
Each
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230 V ac 3W DPNO - DIN Rail 16A 4kV - - Screw 5TT4 400V ac - -
N° de stock RS 758-6885
Référence fabricantLZS:RT78726
MarqueSiemens
6,62 €
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- - - - - - - - - - LZS - - -
N° de stock RS 622-0569
Référence fabricant5TT4205-0
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34,29 €
Each
Unité
230 V ac 3W SPDT - DIN Rail 16A 4kV - - Screw 5TT4 400V ac - -
N° de stock RS 622-0581
Référence fabricant5TT4207-0
MarqueSiemens
50,94 €
Each
Unité
230 V ac 3W DPDT - DIN Rail 16A 4kV - - Screw 5TT4 400V ac - -
N° de stock RS 758-6823
Référence fabricantLZS:PT3A5L24
MarqueSiemens
18,54 €
Each
Unité
24 V dc - 3PDT - Plug In 8A - - - Screw LZS 230V 24V -
N° de stock RS 758-6835
Référence fabricantLZS:PT5A5T30
MarqueSiemens
19,71 €
Each
Unité
230 V ac - 4PDT - Plug In 6A - - - Screw LZS 230V 24V -
N° de stock RS 758-6895
Référence fabricantLZX:PT570615
MarqueSiemens
8,95 €
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Unité
115 V ac - 4PDT - Plug In 6A - - - Screw LZX 230V 24V -
N° de stock RS 758-6891
Référence fabricantLZX:PT570024
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7,72 €
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24 V dc - 4PDT - Plug In 6A - - - Screw LZX 230V 24V -
N° de stock RS 758-6876
Référence fabricantLZS:RT4A4L24
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19,89 €
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24 V - DPDT - Plug In 2.5A - - - Screw LZS 230V - -
N° de stock RS 758-6839
Référence fabricantLZS:PT5B5L24
MarqueSiemens
18,54 €
Each
Unité
24 V dc - 4PDT - Plug In 6A - - - Screw LZS 230V 24V -
N° de stock RS 622-0575
Référence fabricant5TT4206-0
MarqueSiemens
35,01 €
Each
Unité
230 V ac 3W SPDT - DIN Rail 16A 4kV - - Screw 5TT4 250V ac - -
N° de stock RS 758-6860
Référence fabricantLZS:RT3A4L24
MarqueSiemens
18,90 €
Each
Unité
24 V dc - SPDT - Plug In 3A - - - Screw LZS 230V - -
N° de stock RS 758-6863
Référence fabricantLZS:RT3A4T30
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21,96 €
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Unité
230 V ac - SPDT - Plug In - - - - Screw LZS - - -
N° de stock RS 175-2353
Référence fabricant3RS1800-2BP00
MarqueSiemens
51,12 €
Each
Unité
240 V ac/dc - DPDT - DIN Rail 1 (DC) A, 3 (AC) A - 3 A 1 A Cage Clamp 3RS1 240V ac 24V dc -
N° de stock RS 175-2352
Référence fabricant3RS1800-2AP00
MarqueSiemens
42,48 €
Each
Unité
240 V ac/dc - SPDT - DIN Rail 1 (DC) A, 3 (AC) A - 3 A 1 A Cage Clamp 3RS1 240V ac 24V dc -
N° de stock RS 175-2350
Référence fabricant3RS1800-1BP00
MarqueSiemens
50,13 €
Each
Unité
240 V ac/dc - DPDT - DIN Rail 1 (DC) A, 3 (AC) A - 3 A 1 A Screw 3RS1 240V ac 24V dc -
N° de stock RS 758-6832
Référence fabricantLZS:PT5A5L24
MarqueSiemens
18,54 €
Each
Unité
24 V dc - 4PDT - Plug In 6A - - - Screw LZS 230V 24V -