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

818 of 859
Panasonic Surface Mount Latching Relay, 3V dc Coil, DPDT
  • RS Stock No. 247-4080
  • Mfr. Part No. AGQ210A03
Each (In a Tube of 50)
SGD4.361(exc. GST)
Sensata Crydom EZ Series Solid State Relay, 18 A rms Load, Panel Mount, 280 Vrms Load, 15 V dc Control
  • RS Stock No. 145-0595
  • Mfr. Part No. EZ240D18
Each
SGD78.85(exc. GST)
Omron DIN Rail Power Relay, 24V dc Coil, 5A Switching Current, SPST
  • RS Stock No. 266-062
  • Mfr. Part No. G70D-SOC16-1 DC24
Each
SGD246.90(exc. GST)
Durakool PCB Mount Automotive Relay, 12V dc Coil Voltage, 90A Switching Current, SPDT
  • RS Stock No. 276-5980
  • Mfr. Part No. DG82-7011-36-1012-DR-P001
Each (In a Pack of 5)
SGD4.564(exc. GST)
Eaton Z-TN Series Relay, DIN Rail Mount, 230V ac Coil, 4PST, 4-Pole, 20A Load
  • RS Stock No. 255-361
  • Mfr. Part No. 265579 Z-TN230/4S
Each
SGD66.79(exc. GST)
Eaton Phase, Voltage Monitoring Relay, 250 → 400V ac, DIN Rail
  • RS Stock No. 179-3546
  • Mfr. Part No. 184778 EMR6-W400-M-1
Each
SGD337.67(exc. GST)
Durakool SRA3 Series Solid State Relay, 25 A Load, Panel Mount, 480 V ac Load, 250V ac Control
  • RS Stock No. 276-6034
  • Mfr. Part No. SRA3Z-25K-A
Each
SGD197.63(exc. GST)
Panasonic Solid State Relay, 100 mA Load, PCB Mount, 400 V Load, 1.5 V Control
  • RS Stock No. 699-6584
  • Mfr. Part No. AQY214S
Each
SGD6.91(exc. GST)
TE Connectivity PCB Mount Reed Relay, 12V dc Coil, SPST, 200V dc Max, 1 A Max, 1000Ω
  • RS Stock No. 256-2055
  • Mfr. Part No. V23100V4012A000
Each
SGD16.58(exc. GST)
Omron PCB Mount Power Relay, 12V dc Coil, SPST
  • RS Stock No. 158-881
  • Mfr. Part No. G4A-1A-PE DC12
Each
SGD12.83(exc. GST)
Siemens 3RF2 Series Solid State Relay, 50 A Load, DIN Rail Mount, 460 V Load
  • RS Stock No. 203-2164
  • Mfr. Part No. 3RF2350-3AA04
Each
SGD226.68(exc. GST)
Durakool D14F 8 Pin 300V ac DIN Rail Relay Socket, for use with DM42, DM43, DM84, DM85, DX84, DX85 Relays
  • RS Stock No. 276-5948
  • Mfr. Part No. D14F-2Z-C3-N
Each
SGD3.73(exc. GST)
Relpol Plug In Power Relay, 110V ac Coil, 10A Switching Current, 3PDT
  • RS Stock No. 123-2075
  • Mfr. Part No. R15-2013-23-5110-WTL
Each
SGD28.53(exc. GST)
Siemens Temperature Monitoring Relay, 1 Phase, SPDT
  • RS Stock No. 233-7606
  • Mfr. Part No. 3RS2500-1AW30
Each
SGD364.73(exc. GST)
Dold BC7933N Series DIN Rail Mount Timer Relay, 24V ac/dc, 1-Contact, 0.5 → 100 s, 0.5 → 60min,
  • RS Stock No. 358-7112
  • Mfr. Part No. BC7933N.81 AC/DC24V 3-60M
Each
SGD119.49(exc. GST)
TE Connectivity PCB Mount Power Relay, 12V dc Coil, 16A Switching Current, SPDT
  • RS Stock No. 782-1270
  • Mfr. Part No. RT314012F
Each
SGD6.35(exc. GST)
Finder DIN Rail Relay, 250V dc Coil, 8A Switching Current
  • RS Stock No. 247-9279
  • Mfr. Part No. RR1492500000
Each
SGD348.85(exc. GST)
Phoenix Contact Plug In Power Relay, 48V dc Coil, 10mA Switching Current, DPDT
  • RS Stock No. 120-127
  • Mfr. Part No. 2834834
1 Pack of 10
SGD75.60(exc. GST)
Eaton Series ETR2 Series DIN Rail Mount Timer Relay, 240V ac, 1-Contact, 0.05 → 3600000s, 1-Function
  • RS Stock No. 254-488
  • Mfr. Part No. 262688 ETR2-42
Each
SGD196.90(exc. GST)
TE Connectivity PCB Mount Force Guided Relay, 24V dc Coil Voltage, 4 Pole, 3PST, SPST
  • RS Stock No. 680-3571P
  • Mfr. Part No. SR6M4024
Each (Supplied in a Tube)
SGD39.04(exc. GST)
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