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

17141 Products showing for Relays & Signal Conditioning

2 of 858
In Stock
Meder Reed Relay
  • RS Stock No. 349-1768
  • Mfr. Part No. DIL05-2C90-63L
Subtotal (1 unit)
$46.62(exc. GST)
$46.62/unit
In Stock
RS PRO Power Relay, 240V ac Coil, 16A Switching Current, SPDT
  • RS Stock No. 121-7809
Subtotal (1 unit)
$24.37(exc. GST)
$24.37/unit
Currently unavailable
Omron Surface Power Relay, 12V dc Coil, 5A Switching Current, DPDT
  • RS Stock No. 133-094
  • Mfr. Part No. MY2K DC12
Subtotal (1 unit)
$109.63(exc. GST)
$109.63/unit
In Stock
Better World
Schneider Electric Harmony Relay RSB Series Interface Relay
  • RS Stock No. 256-4749
  • Mfr. Part No. RSB2A080E7
Subtotal (1 box of 10 units)
$248.60(exc. GST)
$248.60/box
Limited stock
Omron P7SA 10 Way 24V dc DIN Rail Relay Socket, for use with G7SA Series Relay
  • RS Stock No. 125-0869
  • Mfr. Part No. P7SA-10F-ND-PU 24VDC
Subtotal (1 unit)
$109.22(exc. GST)
$109.22/unit
In Stock
Schneider Electric Harmony Relay RSB Series Interface Relay, DIN Rail, 24V dc Coil, DPDT
  • RS Stock No. 203-5209
  • Mfr. Part No. RSB2A080BDPV
Subtotal (1 unit)
$24.43(exc. GST)
$24.43/unit
In Stock
Schneider Electric Harmony Relay RXG Series Interface Relay, DIN Rail, 24V ac Coil, DPDT
  • RS Stock No. 203-5239
  • Mfr. Part No. RXG21B7PV
Subtotal (1 unit)
$31.02(exc. GST)
$31.02/unit
In Stock
RS PRO Monitoring Relay, 1 Phase, DIN Rail
  • RS Stock No. 132-174
Subtotal (1 unit)
$56.43(exc. GST)
$56.43/unit
In Stock
Finder 94 14 Way 250V ac DIN Rail Relay Socket, for use with 55.34 Series Relay
  • RS Stock No. 189-3263
  • Mfr. Part No. 94.74SMA
Subtotal (1 unit)
$28.31(exc. GST)
$28.31/unit
In Stock
Better World
Schneider Electric Harmony Relay RXG 5 Way 250V DIN Rail Relay Socket, for use with RXG Series Relay
  • RS Stock No. 852-6894
  • Mfr. Part No. RGZE1S35M
Subtotal (1 unit)
$11.36(exc. GST)
$11.36/unit
Unavailable
Schneider Electric Preventa XPS AF Safety Relay 24V ac/dc, Single/Dual-Channel 3 Safety Contacts
  • RS Stock No. 360-4346
  • Mfr. Part No. XPSAF5130
Subtotal (1 unit)
$866.40(exc. GST)
$866.40/unit
In Stock
Finder 94 14 Way 250V ac Screw Relay Socket, for use with 55.32 Series Relay, 55.34, 85.04
  • RS Stock No. 400-9146
  • Mfr. Part No. 94.04SMA
Subtotal (1 unit)
$28.37(exc. GST)
$28.37/unit
In Stock
Hongfa Europe GMBH Flange Power Relay, 230V ac Coil, 30A Switching Current, SPST
  • RS Stock No. 121-8061
  • Mfr. Part No. HF116F-3/230AF-1HTFW
Subtotal (1 unit)
$36.99(exc. GST)
$36.99/unit
In Stock
Tele E1ZM10 Series DIN Rail Timer Relay, 1-Contact, 240 V dc 24V ac, 240 V ac, 0.05 s to 100 h, Multifunction-Function,
  • RS Stock No. 160-290
  • Mfr. Part No. E1ZM10 24-240V AC/DC
Subtotal (1 unit)
$54.46(exc. GST)
$54.46/unit
Temporarily out of stock
Phoenix Contact PLC-RSC-120UC/21/MS Series Interface Relay, DIN Rail, 110V ac/dc Coil, SPDT, 15.3mA
  • RS Stock No. 134-8705
  • Mfr. Part No. 2909651
Subtotal (1 unit)
$33.52(exc. GST)
$33.52/unit
In Stock
Finder Pluggable Function Module for use with Finder Series
  • RS Stock No. 666-8015
  • Mfr. Part No. 99.02.9.024.99
Subtotal (1 unit)
$12.13(exc. GST)
$12.13/unit
In Stock
RS PRO RS PRO Solid State Interface Relay 48 V 48V DIN Rail
  • RS Stock No. 212-5492
Subtotal (1 unit)
$39.53(exc. GST)
$39.53/unit
In Stock
Omron P2RF 5 Way 250V ac DIN Rail Relay Socket, for use with G2R-1-S Series General Purpose Relay, H3RN Series Timer
  • RS Stock No. 111-3066
  • Mfr. Part No. P2RF-05-PU
Subtotal (1 unit)
$33.13(exc. GST)
$33.13/unit
Being discontinued
Phoenix Contact RIF-1-RSC-LDP-24DC/2X21 Series Interface Relay, DIN Rail, 24V dc Coil, DPDT, 18mA
  • RS Stock No. 175-0523
  • Mfr. Part No. 2903350
Subtotal (1 unit)
$31.08(exc. GST)
$31.08/unit
In Stock
Eaton MTL Series Signal Conditioner, Voltage Input, Voltage Output, 20V dc, 35 V dc Supply, Zone 0, IIC, T4 to 6, Group
  • RS Stock No. 174-7908
  • Mfr. Part No. MTL5525
Subtotal (1 unit)
$448.14(exc. GST)
$448.14/unit
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