Power Relays

Power relays are a type of switch used within PCBs to open or close the circuit. Power relays are designed to handle higher voltages and higher currents. However, they can also be used with low voltages too.

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.

How to choose a power 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 Latching Maximum Switching Current DC Number of Poles Terminal Type Maximum Switching Voltage AC Maximum Switching Voltage DC
RS Stock No. 121-7797
BrandRS PRO
kr 120,67
Each
Units
12V dc 180W 4PDT - Plug In 6A 2kV ac - No - 4 Plug In 250V ac 30V dc
RS Stock No. 476-583
BrandRS PRO
kr 29,35
Each
Units
12V dc 360mW SPDT 400Ω PCB Mount 10A 2kV ac - No - 1 Through Hole 277V ac 30V dc
RS Stock No. 348-762
BrandRS PRO
kr 126,43
Each
Units
230V ac 2W DPDT 8200Ω Plug In 10A 1.5kV ac - No - 2 Through Hole 240V 30V
RS Stock No. 800-4491
BrandRS PRO
kr 39,14
Each
Units
48V dc 530mW DPDT 4170Ω PCB Mount 10A 5kV ac - No - 2 Through Hole 250V ac 30V dc
RS Stock No. 476-573
BrandRS PRO
kr 28,37
Each
Units
6V dc 360mW SPDT 100Ω PCB Mount 10A 2kV ac - No - 1 Through Hole 277V ac 30V dc
RS Stock No. 800-4463
BrandRS PRO
kr 47,94
Each
Units
24V ac 750mW DPDT 350Ω PCB Mount 8A 5kV ac - No - 2 Through Hole 440V ac 300V dc
RS Stock No. 121-7812
BrandRS PRO
kr 92,19
Each
Units
24V ac 300W DPDT - Plug In 10A 2kV ac - No - 2 Plug In 250V ac 30V dc
RS Stock No. 121-7822
BrandRS PRO
kr 173,40
Each
Units
24V ac 300W 4PDT - Plug In 10A 2kV ac - No - 4 Plug In 250V ac 30V dc
RS Stock No. 800-4508
BrandRS PRO
kr 35,11
Each
Units
24V 530mW SPDT 1100Ω PCB Mount 20A 4kV ac - No - 1 Through Hole 277V ac 30V dc
RS Stock No. 450-0380
BrandRS PRO
kr 88,82
Each
Units
230V ac 1.2W DPDT 12500Ω Plug In 10A 1.5kV ac - No - 2 PCB Pin 240V ac 30V dc
RS Stock No. 800-4454
BrandRS PRO
kr 37,62
Each
Units
24V dc 400mW DPDT 1440Ω PCB Mount 8A 5kV ac - No - 2 Through Hole 440V ac 300V dc
RS Stock No. 121-7810
BrandRS PRO
kr 101,65
Each
Units
12V dc 300W DPDT - Plug In 10A 2kV ac - No - 2 Plug In 250V ac 30V dc
RS Stock No. 348-784
BrandRS PRO
kr 104,91
Each
Units
24V dc 1.2W DPDT 478Ω Plug In 10A 1.5kV ac - No - 2 Through Hole 240V 30V
RS Stock No. 121-7809
BrandRS PRO
kr 82,84
Each
Units
240V ac 480W SPDT - Plug In 16A 2kV ac - No - 1 Plug In 250V ac 30V dc
RS Stock No. 121-7804
BrandRS PRO
kr 94,26
Each
Units
12V dc 480W SPDT - Plug In 16A 2kV ac - No - 1 Plug In 250V ac 30V dc
RS Stock No. 800-4495
BrandRS PRO
kr 36,53
Each
Units
5V dc 530mW SPDT 47Ω PCB Mount 20A 4kV ac - No - 1 Through Hole 277V ac 30V dc
RS Stock No. 121-7820
BrandRS PRO
kr 178,51
Each
Units
12V dc 300W 4PDT - Plug In 10A 2kV ac - No - 4 Plug In 250V ac 30V dc
RS Stock No. 450-0425
BrandRS PRO
kr 55,88
Each
Units
24V dc 900mW DPDT 650Ω Plug In 10A 1.5kV ac - No - 2 PCB Pin 240V ac 30V dc
RS Stock No. 144-1598
BrandRS PRO
kr 112,95
Each
Units
24V ac 530mW SPDT 240Ω Plug In 10 A, 12A 5kV ac 10 A No 12 A 1 PCB Pin 250V 30V
RS Stock No. 121-7821
BrandRS PRO
kr 153,83
Each
Units
24V dc 300W 4PDT - Plug In 10A 2kV ac - No - 4 Plug In 250V ac 30V dc