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.

17739 Products showing for Relays & Signal Conditioning

13 of 887
In Stock
  • RS Stock No. 884-1521
  • Mfr. Part No. RXM3AB2P7
Subtotal (1 unit)
PHP568.40(exc. VAT)
PHP568.40/unit
In Stock
  • RS Stock No. 794-8243
  • Mfr. Part No. PYF11A
Subtotal (1 unit)
PHP832.48(exc. VAT)
PHP832.48/unit
In Stock
  • RS Stock No. 784-5784
  • Mfr. Part No. 3SK1111-1AW20
Subtotal (1 unit)
PHP31,946.47(exc. VAT)
PHP31,946.47/unit
In Stock
  • RS Stock No. 265-5203
  • Mfr. Part No. G9SE-201 DC24
Subtotal (1 unit)
PHP11,671.24(exc. VAT)
PHP11,671.24/unit
In Stock
  • RS Stock No. 536-906
  • Mfr. Part No. MKS3PI-5 230VAC
Subtotal (1 unit)
PHP1,619.80(exc. VAT)
PHP1,619.80/unit
In Stock
  • RS Stock No. 192-3399
Subtotal (1 unit)
PHP13,180.45(exc. VAT)
PHP13,180.45/unit
In Stock
  • RS Stock No. 350-591
  • Mfr. Part No. 60.12.9.024.0040
Subtotal (1 unit)
PHP1,158.50(exc. VAT)
PHP1,158.50/unit
In Stock
  • RS Stock No. 741-8653
  • Mfr. Part No. SRB301ST-24V-(V.2)
Subtotal (1 unit)
PHP22,527.78(exc. VAT)
PHP22,527.78/unit
In Stock
  • RS Stock No. 828-6726
  • Mfr. Part No. G2R-1-SN 120VAC (S)
Subtotal (1 unit)
PHP1,104.55(exc. VAT)
PHP1,104.55/unit
In Stock
  • RS Stock No. 819-8805
  • Mfr. Part No. 39.01.0.024.0060
Subtotal (1 unit)
PHP804.87(exc. VAT)
PHP804.87/unit
Stocked by manufacturer
  • RS Stock No. 653-473
  • Mfr. Part No. 30.22.7.005.0020
Subtotal (1 bag of 20 units)
PHP6,205.32(exc. VAT)
PHP6,205.32/bag
In Stock
  • RS Stock No. 424-9912
  • Mfr. Part No. MK7850N.82/500 AC/DC12-240V 0.02S-300H
Subtotal (1 unit)
PHP17,133.62(exc. VAT)
PHP17,133.62/unit
In Stock
  • RS Stock No. 699-7067
  • Mfr. Part No. 7PV1518-1AW30
Subtotal (1 unit)
PHP4,794.38(exc. VAT)
PHP4,794.38/unit
In Stock
  • RS Stock No. 146-5865
  • Mfr. Part No. SRB-E-204PE
Subtotal (1 unit)
PHP19,735.60(exc. VAT)
PHP19,735.60/unit
In Stock
  • RS Stock No. 794-3648
  • Mfr. Part No. 2903278
Subtotal (1 unit)
PHP1,995.85(exc. VAT)
PHP1,995.85/unit
In Stock
  • RS Stock No. 511-1183
  • Mfr. Part No. 22.23.9.024.4000
Subtotal (1 unit)
PHP2,068.72(exc. VAT)
PHP2,068.72/unit
Stocked by manufacturer
  • RS Stock No. 266-274
  • Mfr. Part No. PTF11A FOR LY
Subtotal (1 unit)
PHP390.94(exc. VAT)
PHP390.94/unit
In Stock
  • RS Stock No. 431-7447
  • Mfr. Part No. 38.51.0.125.0060
Subtotal (1 unit)
PHP1,462.55(exc. VAT)
PHP1,462.55/unit
In Stock
  • RS Stock No. 271-1929
  • Mfr. Part No. MY4-GS-R AC220/240
Subtotal (1 unit)
PHP847.00(exc. VAT)
PHP847.00/unit
Last RS stock
  • RS Stock No. 794-3819
  • Mfr. Part No. 2903676
Subtotal (1 unit)
PHP654.82(exc. VAT)
PHP654.82/unit
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