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

17994 Products showing for Relays & Signal Conditioning

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1 of 900
Temporarily out of stock
Broyce Control Earth Leakage Relay SPDT 1
  • RS Stock No. 842-568
  • Mfr. Part No. ELRM44V-M
Subtotal (1 unit)
PHP4,471.88(exc. VAT)
PHP4,471.88/unit
In Stock
JM CONCEPT ULCOS 900 Series Universal Signal Converter, Current, Voltage, Thermocouple, Resistance, Temperature Input,
  • RS Stock No. 232-8255
  • Mfr. Part No. ULCOS920D0
Subtotal (1 unit)
PHP16,329.21(exc. VAT)
PHP16,329.21/unit
In Stock
Omron Power Relay, 240V ac Coil, 10A Switching Current, 4PDT
  • RS Stock No. 827-7889
  • Mfr. Part No. LY4N 240VAC
Subtotal (1 unit)
PHP2,159.17(exc. VAT)
PHP2,159.17/unit
In Stock
Omron Power Relay, 48V dc Coil, 10A Switching Current, DPDT
  • RS Stock No. 271-1912
  • Mfr. Part No. MY2-GS-R DC48
Subtotal (1 unit)
PHP784.51(exc. VAT)
PHP784.51/unit
In Stock
Panasonic PhotoMOS AQY Series Solid State Relay, 0.12 A Load, PCB Mount, 40 V Load, 1.5V Control
  • RS Stock No. 699-6590
  • Mfr. Part No. AQY221N2S
Subtotal (1 unit)
PHP278.46(exc. VAT)
PHP278.46/unit
In Stock
RS PRO Plug-in Power Relay, 110V ac Coil, 12A Switching Current, 4PDT
  • RS Stock No. 613-3689
Subtotal (1 unit)
PHP850.21(exc. VAT)
PHP850.21/unit
In Stock
Crydom 1-DC Series Solid State Relay, 40 A Load, Panel Mount, 100 V Load, 32V Control
  • RS Stock No. 200-2064
  • Mfr. Part No. D1D40
Subtotal (1 unit)
PHP6,570.59(exc. VAT)
PHP6,570.59/unit
Limited stock
Schneider Electric Harmony Relay RXG Series Interface Relay, DIN Rail, 230V ac Coil, DPDT
  • RS Stock No. 203-5211
  • Mfr. Part No. RXG21P7PV
Subtotal (1 unit)
PHP1,514.49(exc. VAT)
PHP1,514.49/unit
In Stock
RS PRO Phase/Voltage Monitoring Relays, 1 Phase, 150 to 300 V ac Monitor Range, DIN Rail, 230V ac 270 V dc
  • RS Stock No. 558-898
Subtotal (1 unit)
PHP4,067.93(exc. VAT)
PHP4,067.93/unit
In Stock
Schneider Electric Power Relay, 230V ac Coil, 12A Switching Current, DPDT
  • RS Stock No. 884-1458
  • Mfr. Part No. RXM2AB2P7
Subtotal (1 unit)
PHP793.59(exc. VAT)
PHP793.59/unit
In Stock
Siemens 3RF2 Series Solid State Relay, 30 A Load, DIN Rail Mount, 600 V Load, 30V Control
  • RS Stock No. 203-2135
  • Mfr. Part No. 3RF2330-1AA45
Subtotal (1 unit)
PHP14,617.06(exc. VAT)
PHP14,617.06/unit
In Stock
ABB Monitoring Relay, 3 Phase, DPDT, DIN Rail, 500V ac
  • RS Stock No. 775-7885
  • Mfr. Part No. 1SVR730774R3300 CM-PAS.41S
Subtotal (1 unit)
PHP21,600.06(exc. VAT)
PHP21,600.06/unit
In Stock
Omron H3CR Series Timer Relay, 2-Contact 100V ac, 125 V ac, 240 V ac, 0.05 to 1080000 s, DPDT Switch Configuration
  • RS Stock No. 264-1622
  • Mfr. Part No. H3CR-A8 100-240VAC/100-125VDC
Subtotal (1 unit)
PHP9,622.83(exc. VAT)
PHP9,622.83/unit
In Stock
Omron Power Relay, 24V dc Coil, 10A Switching Current, DPDT
  • RS Stock No. 828-7328
  • Mfr. Part No. LY2N 24VDC
Subtotal (1 unit)
PHP1,232.73(exc. VAT)
PHP1,232.73/unit
In Stock
Broyce Control RCD Switch Earth Leakage Relay
  • RS Stock No. 511-9121
  • Mfr. Part No. ELRM44V-30 115/230VAC
Subtotal (1 unit)
PHP12,323.30(exc. VAT)
PHP12,323.30/unit
In Stock
TE Connectivity PCB Power Relay, 24V dc Coil, 8A Switching Current, DPDT
  • RS Stock No. 680-3849
  • Mfr. Part No. RT424024 6-1393243-8
Subtotal (1 unit)
PHP307.45(exc. VAT)
PHP307.45/unit
Temporarily out of stock
Omron Power Relay, 12V dc Coil, 10A Switching Current, DPDT
  • RS Stock No. 271-1910
  • Mfr. Part No. MY2-GS-R DC12
Subtotal (1 unit)
PHP645.21(exc. VAT)
PHP645.21/unit
In Stock
Panasonic PCB Power Relay, 24V dc Coil, 5A Switching Current, SPST
  • RS Stock No. 134-7957
  • Mfr. Part No. APAN3124
Subtotal (1 unit)
PHP363.55(exc. VAT)
PHP363.55/unit
In Stock
Hongfa Europe GMBH PCB Power Relay, 12V dc Coil, 10A Switching Current, SPST
  • RS Stock No. 176-2886
  • Mfr. Part No. HF33F/012-HSL3F
Subtotal (1 pack of 5 units)
PHP509.88(exc. VAT)
PHP101.976/unit
In Stock
Phoenix Contact PLC-OPT- 24DC/230AC/1 Relay Socket DIN Rail Push-in
  • RS Stock No. 711-4746
  • Mfr. Part No. 2900369
Subtotal (1 unit)
PHP2,396.71(exc. VAT)
PHP2,396.71/unit
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