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

17129 Products showing for Relays & Signal Conditioning

3 of 857
In Stock
Pilz PNOZsigma PNOZ s4 C Safety Relay 24V dc, Dual-Channel
  • RS Stock No. 268-7567
  • Mfr. Part No. 751104
Subtotal (1 unit)
SGD398.55(exc. GST)
In Stock
Finder 83 Series Series DIN Rail Mount Timer Relay, 24 → 240V ac/dc, 1-Contact, 0.05-10 s, 0.05-10 d, 0.05-10
  • RS Stock No. 759-6634
  • Mfr. Part No. 83.01.0.240.0000
Subtotal (1 unit)
SGD111.07(exc. GST)
In Stock
Phoenix Contact PCB Mount Power Relay, 24V dc Coil, 6A Switching Current, SPDT
  • RS Stock No. 290-1416
  • Mfr. Part No. 2961105
Subtotal (1 unit)
SGD25.84(exc. GST)
In Stock
TE Connectivity PCB Mount Latching Power Relay, 24V dc Coil, 8A Switching Current, DPDT
  • RS Stock No. 161-4080
  • Mfr. Part No. RT424F24
Subtotal (1 tube of 20 units)
SGD163.16(exc. GST)
In Stock
Omron MY2 14 Pin 250 V ac DIN Rail Relay Socket, for use with MY2IN, MY2IN1, MY2IN1-D2, MY2IN-CR, MY2IN-D2, MY2N,
  • RS Stock No. 326-6922
  • Mfr. Part No. PY08-02
Subtotal (1 unit)
SGD3.09(exc. GST)
In Stock
ABB R600 Series Interface Relay, DIN Rail Mount, 24V ac/dc Coil, SPDT, 6A Load
  • RS Stock No. 669-9980
  • Mfr. Part No. 1SNA645001R0300 RB121-24VUC
Subtotal (1 unit)
SGD34.60(exc. GST)
In Stock
Omron PCB Mount Relay, 24V dc Coil, 5A Switching Current, SPST
  • RS Stock No. 243-6599
  • Mfr. Part No. G6DN-1A-SL DC24
Subtotal (1 pack of 2 units)
SGD6.71(exc. GST)
In Stock
Finder 4C Series Interface Relay, DIN Rail Mount, 24V dc Coil, DPDT-2C/0, 2-Pole, 8A Load
  • RS Stock No. 123-2836
  • Mfr. Part No. 4C.P2.9.024.0050SPA
Subtotal (1 unit)
SGD33.50(exc. GST)
In Stock
Schneider Electric Phase, Voltage Monitoring Relay, 3 Phase, DPDT, 380 → 480V ac, DIN Rail
  • RS Stock No. 124-0184
  • Mfr. Part No. RM22TR33
Subtotal (1 unit)
SGD244.02(exc. GST)
In Stock
GIC DIN Rail Mount Timer Relay, 12 → 240V ac/dc, 1-Contact, 0.1 s → 100h, SPDT
  • RS Stock No. 818-4563
  • Mfr. Part No. 1CMDT0
Subtotal (1 unit)
SGD68.89(exc. GST)
In Stock
Sensata Crydom CW Series Solid State Relay, 50 A rms Load, Panel Mount, 660 V ac Load, 32 V Control
  • RS Stock No. 491-4931
  • Mfr. Part No. CWD4850-10
Subtotal (1 unit)
SGD135.32(exc. GST)
In Stock
Finder Voltage Monitoring Relay, 3 Phase, SPDT, 300 → 480V ac
  • RS Stock No. 789-2746
  • Mfr. Part No. 70.41.8.400.2030
Subtotal (1 unit)
SGD154.47(exc. GST)
Limited stock
Omron PCB Mount Signal Relay, 24V dc Coil, 2A Switching Current, DPDT
  • RS Stock No. 369-517
  • Mfr. Part No. G5V-2 DC24
Subtotal (1 unit)
SGD10.01(exc. GST)
In Stock
Finder 38 Series Interface Relay, DIN Rail Mount, 24V dc Coil, SPST
  • RS Stock No. 666-7930
  • Mfr. Part No. 38.41.7.024.9024
Subtotal (1 unit)
SGD100.63(exc. GST)
In Stock
Releco CT3-A Series Plug In Timer Relay, 20 → 65V ac/dc, 0.2 → 30 min, 0.2 → 30s, 1-Function
  • RS Stock No. 459-4420
  • Mfr. Part No. CT3-A30 / L
Subtotal (1 unit)
SGD207.79(exc. GST)
In Stock
Finder 95 250V ac DIN Rail Relay Socket, for use with 40.31 Series Relay
  • RS Stock No. 400-4129
  • Mfr. Part No. 95.03.SPA
Subtotal (1 unit)
SGD6.69(exc. GST)
In Stock
Schneider Electric Plug In Power Relay, 120V ac Coil, DPST-C/O
  • RS Stock No. 922-1770
  • Mfr. Part No. RXG23F7
Subtotal (1 unit)
SGD22.46(exc. GST)
In Stock
Phoenix Contact PLC-OPT Series Solid State Interface Relay, 28.8 V dc Control, 15 A Load, DIN Rail Mount
  • RS Stock No. 711-4705
  • Mfr. Part No. 2900364
Subtotal (1 unit)
SGD59.98(exc. GST)
In Stock
Omron G2R 8 Pin 250V ac DIN Rail Relay Socket, for use with G2R-2-S Series General Purpose Relay, H3RN Series Timer,
  • RS Stock No. 111-3067
  • Mfr. Part No. P2RF-08-PU
Subtotal (1 unit)
SGD19.16(exc. GST)
In Stock
Finder Plug In Power Relay, 230V ac Coil, 12A Switching Current, DPDT
  • RS Stock No. 154-374
  • Mfr. Part No. 56.32.8.230.0040
Subtotal (1 unit)
SGD31.09(exc. GST)
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