Relays & Signal Conditioning

At RS, we stock a large choice of relay switch products for a wide variety of applications. Within our range, you will find products such as latching and non-latching relays, solid state relays, interface relays and reed relays. All our relay switch products are from trusted electrical relay suppliers such as our own RS PRO brand, Omron, Finder, TE Connectivity, Panasonic, Phoenix Contact and more.

What is a relay?

Relays are a type of switch that operate electronically to turn AC or DC currents on or off within an electrical circuit. Relays operate similar to a typical light switch, where power is switched on and off when the switch lever is moved, but the main difference lies in how a relay is operated by an electrical circuit rather than manually pressed.

Relays have many different uses and are often utilised in situations where isolation is necessary or when a circuit needs to be controlled with a low-power signal. There are also specialised types of relay switches that are used for very high-power applications; these are referred to as contactors.

Types of relay

Electromechanical Relay (EMR): An electromechanical relay uses a physical moving arm, triggered by a voltage applied to the relay coil, this arm connects contacts within the output component of the relay. The movement of the arm allows an electrical circuit to be completed, allowing AC or DC current to flow to the connected equipment. The physical components within the relays commonly make a "click" sound, which can be used as an audible operation indicator.

Solid State Relay (SSR): Solid state relays provide a similar function to an EMR but these do not contain any moving components, increasing long-term reliability. SSR' feature semiconductor switching elements; typically thyristors, triacs and diodes that transmit and energise the output signal. When activated, the input signal acts like a switch that allows a high-voltage signal to pass through the SSRs output components.

Shop relays, relay accessories, and signal conditioners isolators at RS today.

Relay Accessories
Relay Accessories
Relays
Relays
Signal Conditioners & Isolators
Signal Conditioners & Isolators

17174 Products showing for Relays & Signal Conditioning

33 of 859
In Stock
Idec SF1V 6 Pin 250V ac DIN Rail Relay Socket, for use with RF1V
  • RS Stock No. 212-2510
  • Mfr. Part No. SF1V-6-07L
Each
SGD25.52(exc. GST)
In Stock
Omron Plug In Power Relay, 24V dc Coil, 5A Switching Current, 4PDT
  • RS Stock No. 827-8387
  • Mfr. Part No. MY4ZN-D2 24VDC (S)
Each
SGD39.04(exc. GST)
In Stock
Sensata Crydom CW24 Series Solid State Relay, 25 A Load, Panel Mount, 280 V ac Load, 48 V dc, 280 V ac Control
  • RS Stock No. 776-1777
  • Mfr. Part No. CWU2425P
Each
SGD93.88(exc. GST)
In Stock
Relpol Plug In Power Relay, 230V ac Coil, 10A Switching Current, 3PDT
  • RS Stock No. 805-2220
  • Mfr. Part No. R15-2013-23-5230-WTL
Each
SGD39.76(exc. GST)
Temporarily out of stock
Sensata Crydom 1-DC Series Solid State Relay, 10 A Load, Surface Mount, 385 V dc Load, 32 V Control
  • RS Stock No. 241-3953
  • Mfr. Part No. D5D10
Each
SGD178.14(exc. GST)
Temporarily out of stock
TE Connectivity SSR3 Series Solid State Relay 3 Phase, 75 A Load, Panel Mount, 480 V ac Load
  • RS Stock No. 223-2022
  • Mfr. Part No. 2345984-9
Each
SGD306.87(exc. GST)
In Stock
Wieland safeRELAY SNA 4043K 1 Auxiliary Contacts Safety Relay 24V ac/dc, Dual-Channel 3 Safety Contacts
  • RS Stock No. 122-2497
  • Mfr. Part No. R1.188.1810.0
Each
SGD508.23(exc. GST)
In Stock
Sensata Crydom Solid State Relay, 65 A Load, DIN Rail Mount, 660 V Load, 32 V Control
  • RS Stock No. 291-3100
  • Mfr. Part No. CMRD6065
Each
SGD313.78(exc. GST)
In Stock
Finder Series 39 Series Solid State Interface Relay, 13.2 V Control, 6 A Load, DIN Rail Mount
  • RS Stock No. 819-8795
  • Mfr. Part No. 39.00.7.012.9024
Each
SGD73.68(exc. GST)
Currently unavailable
Omron H5CX Series Panel Mount Timer Relay, 100 → 240V ac, 1-Contact, 0.001 s → 9999h
  • RS Stock No. 687-6092
  • Mfr. Part No. H5CX-A-N
Each
SGD396.82(exc. GST)
In Stock
Dold Safemaster BN 5983 1 Auxiliary Contacts Safety Relay 230V ac, Dual-Channel 3 Safety Contacts
  • RS Stock No. 240-8686
  • Mfr. Part No. BN5983.53 AC50/60Hz 230V
Each
SGD813.88(exc. GST)
Limited stock
Sensata Crydom Solid State Relay, 1.5 A rms Load, PCB Mount, 280 V rms Load, 10 V dc Control
  • RS Stock No. 218-1909
  • Mfr. Part No. ASO241
Each
SGD25.53(exc. GST)
In Stock
Phoenix Contact Power Relay, 24V dc Coil, 8A Switching Current, DPDT
  • RS Stock No. 171-7053
  • Mfr. Part No. 2908181
Each
SGD7.51(exc. GST)
Last RS stock
Omron Plug In Latching Power Relay, 24V dc Coil, DPDT
  • RS Stock No. 818-4260
  • Mfr. Part No. MY2IN1 24VDC (S)
Each
SGD14.65(exc. GST)
In Stock
Omron G6B 4 Pin 380V ac DIN Rail Relay Socket, for use with G6B(U)-1114P-US-P6B, G6B-1174P-US-P6B
  • RS Stock No. 655-4682
  • Mfr. Part No. P6B-04P
Each (In a Pack of 5)
SGD4.502(exc. GST)
In Stock
Phoenix Contact PLC-RSC- 24DC/21-21/EX Series Relay Module, DIN Rail Mount, 24V dc Coil, DPDT, 2-Pole
  • RS Stock No. 175-0505
  • Mfr. Part No. 2909509
Each
SGD38.02(exc. GST)
In Stock
Better World
Schneider Electric Phase Monitoring Relay, 3 Phase, DPDT, <100V ac, DIN Rail
  • RS Stock No. 179-9431
  • Mfr. Part No. RM22TA31
Each
SGD243.80(exc. GST)
In Stock
Better World
Schneider Electric Harmony Time Series DIN Rail Mount Timer Relay, 24 V dc, 24 → 240V ac, 2-Contact, 0.1 s
  • RS Stock No. 791-2739
  • Mfr. Part No. RE17RLMU
Each
SGD99.90(exc. GST)
In Stock
Sensata Crydom Panel Mount Relay Heatsink
  • RS Stock No. 703-4555
  • Mfr. Part No. HS103
Each
SGD136.29(exc. GST)
In Stock
Phoenix Contact RIF-1-BPT/2X21 250V ac/dc Relay Base
  • RS Stock No. 224-7561
  • Mfr. Part No. 2900931
Each (In a Pack of 10)
SGD6.871(exc. GST)
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