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 Terminal Type Series Maximum Switching Voltage AC Maximum Switching Voltage DC Application Number of Poles Length
RS庫存編號 758-6835
製造零件編號LZS:PT5A5T30
BrandSiemens
TWD878.00
單位
230 V ac - 4PDT - Plug In 6A - Screw LZS 230V 24V - - 28mm
RS庫存編號 758-6908
製造零件編號LZX:RT424024
BrandSiemens
TWD275.00
單位
24 V dc - - - Plug In 2.5A - Screw LZX 230V - - - 12.5mm
全新
RS庫存編號 211-4116
製造零件編號LZX:MT328024
BrandSiemens
TWD1,230.00
單位
24 V ac - - - Base 10A - - LZX - - - - -
RS庫存編號 175-2345
製造零件編號3RQ3118-2AF00
BrandSiemens
TWD1,311.00
單位
- - - - - - - - SIRIUS - - - - 93mm
RS庫存編號 203-8736
製造零件編號LZX:RT424524
BrandSiemens
TWD283.00
單位
24 V ac - DPDT - Plug In 2A - - LZX - - - - -
全新
RS庫存編號 211-4118
製造零件編號LZX:MT328115
BrandSiemens
TWD1,534.00
單位
115 V ac - - - Base 10A - - LZX - - - - -
RS庫存編號 203-8699
製造零件編號LZX:RT314024
BrandSiemens
TWD231.00
單位
24 V dc 400mW - - - 16A - - Sirius LZS - - - - -
RS庫存編號 175-2308
製造零件編號3RQ3038-1AB00
BrandSiemens
TWD1,587.00
單位
- - - - - - - - SIRIUS - - - - 93mm
RS庫存編號 175-2319
製造零件編號3RQ3052-1SM30
BrandSiemens
TWD1,856.00
單位
- - - - - - - - SIRIUS - - - - 93mm
全新
RS庫存編號 217-6866
製造零件編號LZS:RT4D4T30
BrandSiemens
TWD1,058.60
/個 (每包:5個)
單位
230 V ac 2W - - - 8A - - LZS - - - - -
RS庫存編號 758-6905
製造零件編號LZX:PT570730
BrandSiemens
TWD398.00
單位
230 V ac - 4PDT - Plug In 6A - Screw LZX 230V 24V - - 22.5mm
RS庫存編號 175-2338
製造零件編號3RQ3118-1AF01
BrandSiemens
TWD1,195.00
單位
- - - - - - - - SIRIUS - - - - 93mm
RS庫存編號 175-2309
製造零件編號3RQ3038-1AB01
BrandSiemens
TWD1,675.00
單位
- - - - - - - - SIRIUS - - - - 93mm
RS庫存編號 203-8730
製造零件編號LZX:PT370024
BrandSiemens
TWD344.00
單位
24 V dc 741mW 3CO - Plug In 2A - - LZX - - - - -
全新
RS庫存編號 217-6857
製造零件編號LZS:RT3A4S15
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TWD974.80
/個 (每包:5個)
單位
115 V ac 1W - - - 16A - - LZS - - - - -
RS庫存編號 622-0531
製造零件編號5TT4201-0
BrandSiemens
TWD1,291.00
單位
230 V ac 3W SPNO - DIN Rail 16A 4kV Screw 5TT4 250V ac - - - 18mm
RS庫存編號 758-6873
製造零件編號LZS:RT4B4T30
BrandSiemens
TWD1,014.00
單位
230 V ac - DPDT - Plug In 2.5A - Screw LZS 230V - - - 15.5mm
全新
RS庫存編號 217-6873
製造零件編號LZX:PT370615
BrandSiemens
TWD397.00
單位
115 V ac - - - Base 10A - - LZX - - - - -
RS庫存編號 175-2324
製造零件編號3RQ3053-1SG30
BrandSiemens
TWD2,745.00
單位
- - - - - - - - SIRIUS - - - - 93mm
RS庫存編號 175-2322
製造零件編號3RQ3052-2SM30
BrandSiemens
TWD1,380.00
單位
- - - - - - - - SIRIUS - - - - 93mm