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 794-3658
Référence fabricant2903292
13,35 €
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230 V ac - 3PDT 7.08 kΩ DIN Rail 2A - - - Plug In RIF 250V ac 250V dc -
N° de stock RS 794-3620
Référence fabricant2903273
16,78 €
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Unité
230 V ac 2.8W 3P-NO 7.08 kΩ DIN Rail 8A - - - Plug In RIF 440V ac 250V dc -
N° de stock RS 794-3686
Référence fabricant2903308
7,88 €
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24 V dc 770mW 4PDT 640 Ω DIN Rail 6A - - - Plug In RIF 250V ac 250V dc -
N° de stock RS 794-3632
Référence fabricant2903275
15,53 €
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24 V dc 1.7W 3P-NO 345 Ω DIN Rail 10A - - - Plug In RIF 440V ac 250V dc -
N° de stock RS 794-3654
Référence fabricant2903281
15,53 €
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24 V dc 1.5W DPDT 430 Ω DIN Rail 11A - - - Plug In RIF 440V ac 250V dc -
N° de stock RS 794-3702
Référence fabricant2903315
7,65 €
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Unité
24 V dc 77mW DPDT 640 Ω DIN Rail 2A - - - Plug In RIF 250V ac 250V dc -
N° de stock RS 794-3737
Référence fabricant2903337
7,79 €
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Unité
24 V ac 759W SPDT 350 Ω DIN Rail 50mA - - - Plug In RIF 30V ac 36V dc -
N° de stock RS 794-3730
Référence fabricant2903335
8,99 €
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Unité
230 V ac - SPDT 32.5 kΩ DIN Rail 50mA - - - Plug In RIF 30V ac 36V dc -
N° de stock RS 794-3642
Référence fabricant2903279
16,78 €
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Unité
230 V ac 2.8W DPDT 7.08 kΩ DIN Rail 9A - - - Plug In RIF 440V ac 250V dc -
N° de stock RS 794-3718
Référence fabricant2903329
7,88 €
Each
Unité
24 V ac - DPDT 351 Ω DIN Rail 50mA - - - Plug In RIF 30V ac 36V dc -
N° de stock RS 794-3648
Référence fabricant2903278
16,14 €
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Unité
24 V dc 1.5W 3PDT 430 Ω DIN Rail 10A - - - Plug In RIF 440V ac 250V dc -
N° de stock RS 794-3636
Référence fabricant2903276
17,40 €
Each
Unité
230 V ac 2.8W 3PDT 7.08 kΩ DIN Rail 8A - - - Plug In RIF 440V ac 250V dc -