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

833 of 859
Celduc XK Series Solid State Relay, 10 A Load, DIN Rail Mount, 36 V dc Load, 30 V dc Control
  • RS Stock No. 917-4885
  • Mfr. Part No. XKLD31006
Each
SGD109.25(exc. GST)
Phoenix Contact Current Monitoring Relay, 1 Phase
  • RS Stock No. 519-987
  • Mfr. Part No. 1336512
Each
SGD339.22(exc. GST)
Voltage Monitoring Relay, 3 Phase, DPDT, 12 → 500V ac, DIN Rail
  • RS Stock No. 658-375
  • Mfr. Part No. G4PM500VSYL20
Each
SGD445.47(exc. GST)
RS PRO Solid State Relay, 25 Amps Load, Panel Mount, Surface Mount, 480 V rms Load, 32 V dc Control
  • RS Stock No. 253-7294
Each
SGD67.00(exc. GST)
Siemens DIN Rail Latching Power Relay, 24V ac Coil, 16A Switching Current, DPST
  • RS Stock No. 266-9611
  • Mfr. Part No. 5TT4206-2
Each
SGD89.23(exc. GST)
ATC 339B Series Surface Mount Time Delay Relay, 240V ac, 2-Contact, 0.3 s → 10 h, DPDT
  • RS Stock No. 286-792
  • Mfr. Part No. 339B200T2X
Each
SGD293.95(exc. GST)
Broyce Control Voltage Monitoring Relay, SPDT, 0.1 → 20V ac/dc, DIN Rail
  • RS Stock No. 850-5409
  • Mfr. Part No. LMCVR-20V 24-230VAC/DC
Each
SGD213.12(exc. GST)
Gefran GRS-H Series Solid State Relay, 90 A Load, DIN Rail Mount, 480 V ac Load, 32 V dc Control
  • RS Stock No. 600-829
  • Mfr. Part No. GRS-90-48-D-2-0-0-0
Each
SGD262.40(exc. GST)
Panasonic PCB Mount Automotive Relay, 12V dc Coil Voltage, 20A Switching Current, DPDT
  • RS Stock No. 699-5715
  • Mfr. Part No. ACJ2112
Each
SGD8.27(exc. GST)
Gefran GRS-H Series Solid State Relay, 25 A Load, DIN Rail Mount, 600 V ac Load, 32 V dc Control
  • RS Stock No. 600-933
  • Mfr. Part No. GRS-H-25-60-D-2-0-0-0
Each
SGD216.66(exc. GST)
Hongfa Europe GMBH PCB Mount Power Relay, 12V dc Coil, 17A Switching Current, SPDT
  • RS Stock No. 176-2799
  • Mfr. Part No. HF152FD/12-1ZTF(335)
Each (In a Pack of 5)
SGD3.484(exc. GST)
TE Connectivity PCB Mount Power Relay, 24V dc Coil, 8A Switching Current, SPST
  • RS Stock No. 135-5191
  • Mfr. Part No. V23061A1007A302
Each (In a Tube of 20)
SGD4.406(exc. GST)
Finder PCB Mount Power Relay Module, 60V dc Coil, 8A Switching Current
  • RS Stock No. 248-1896
  • Mfr. Part No. 405270600000
Each (In a Pack of 50)
SGD13.683(exc. GST)
Phoenix Contact Solid State Relay, DIN Rail Mount
  • RS Stock No. 265-7552
  • Mfr. Part No. 2947653
Each (In a Pack of 10)
SGD126.117(exc. GST)
Tele Level Monitoring Relay, 1 Phase, SPDT, DIN Rail
  • RS Stock No. 123-9720
  • Mfr. Part No. E3LM10 230V AC
Each
SGD200.06(exc. GST)
Better World
Schneider Electric Harmony Relay Series Solid State Relay, 20 A Load, DIN Rail Mount
  • RS Stock No. 256-4781
  • Mfr. Part No. SSD1A320BDC3
Each
SGD128.24(exc. GST)
TE Connectivity Panel Mount Power Relay, 110 → 120V ac Coil, 30A Switching Current, DPDT
  • RS Stock No. 782-1615
  • Mfr. Part No. T92P11A22-120 4-1393211-0
Each
SGD34.09(exc. GST)
Panasonic PCB Mount Automotive Relay, 12V dc Coil Voltage, 20A Switching Current, DPDT
  • RS Stock No. 699-5721
  • Mfr. Part No. ACJ5112
Each
SGD8.08(exc. GST)
ifm electronic Level Monitoring Relay, 1 Phase, SPDT
  • RS Stock No. 230-9391
  • Mfr. Part No. DL0203
Each
SGD377.85(exc. GST)
Broyce Control DIN Rail Mount Time Delay Relay, 230V ac, 1-Contact, 2 → 60s, 1-Function, SPDT
  • RS Stock No. 220-4974
  • Mfr. Part No. LDRT 230VAC 2-60s/100ms
Each
SGD103.98(exc. GST)
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