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

19883 Products showing for Relays & Signal Conditioning

1 of 995
In Stock
Broyce Control LEDO Series DIN Rail Timer Relay, 1-Contact, 230 V dc 12 V ac, 230 V ac, 0.1 s to 100 h, 1-Function, SPDT
  • RS Stock No. 828-5155
  • Mfr. Part No. LEDO 12-230V AC/DC
Subtotal (1 unit)
HK$267.10
In Stock
Panasonic PCB Power Relay, 24 V dc Coil, 5 A Switching Current, SPST
  • RS Stock No. 811-3173
  • Mfr. Part No. DSP1A-DC24V
Subtotal (1 unit)
HK$40.80
In Stock
Celduc SO8 Series Solid State Relay, 75 A Load, DIN Rail Mount, 510 Vrms Load, 32V Control
  • RS Stock No. 499-0654
  • Mfr. Part No. SO867070
Subtotal (1 unit)
HK$620.00
In Stock
GIC V0DDT Series DIN Rail Timer Relay, 1-Contact, 240 V dc 240 V ac, 24 V ac, 0.1 s to 999 h, Multifunction-Function,
  • RS Stock No. 714-0029
  • Mfr. Part No. V0DDTD
Subtotal (1 unit)
HK$367.70
In Stock
GIC DIGICON Series DIN Rail Timer Relay, 1-Contact, 24 to 240 V dc 240 V ac, 24 V ac, 0.1 s to 999 h,
  • RS Stock No. 714-0032
  • Mfr. Part No. V0DDTD1
Subtotal (1 unit)
HK$393.90
In Stock
GIC Monitoring Relay, 3 Phase, DPDT, DIN Rail, Base, 415 V ac 28 V dc
  • RS Stock No. 884-2473
  • Mfr. Part No. MAC04D0100
Subtotal (1 unit)
HK$418.90
In Stock
TE Connectivity PCB Power Relay, 12 V dc Coil, 12 A Switching Current, SPDT
  • RS Stock No. 718-1718
  • Mfr. Part No. 1-1415899-0
Subtotal (1 unit)
HK$18.00
In Stock
Retaining Relay Clip Relpol PI84 Interface Relays GZT80
  • RS Stock No. 123-2062
  • Mfr. Part No. GZT80-0040-GREY
Subtotal (1 unit)
HK$10.30
In Stock
ABB Monitoring Relay, 3 Phase, 160/300 V ac Monitor Range, DPDT, DIN Rail
  • RS Stock No. 231-9532
  • Mfr. Part No. 1SVR750489R8300 CM-MPN.72S
Subtotal (1 unit)
HK$3,280.30
In Stock
Pilz PNOZ s5, 48/240 V ac/dc Safety Relay, 2 Safety Contacts
  • RS Stock No. 155-838
  • Mfr. Part No. 750135
Subtotal (1 unit)
HK$3,778.10
Temporarily out of stock
Omron Power Relay, 24 V dc Coil, 6 A Switching Current, 4PDT
  • RS Stock No. 271-1947
  • Mfr. Part No. MY4IN-GS-R DC24
Subtotal (1 unit)
HK$111.00
In Stock
Better World
Schneider Electric Monitoring Relay, 1 Phase, DPDT, DIN Rail, 4mA to 1A, 24 to 240 V dc, 24/240 V ac
  • RS Stock No. 221-2851
  • Mfr. Part No. RM22JA21MR
Subtotal (1 unit)
HK$1,518.90
In Stock
TE Connectivity PCB Non-Latching Relay, 24 V dc Coil, 2 A Switching Current, DPDT
  • RS Stock No. 515-454
  • Mfr. Part No. IM07CGR
Subtotal (1 unit)
HK$22.30
In Stock
Panasonic PCB Signal Relay, 12 V dc Coil, 3 A, SPST
  • RS Stock No. 217-3100
  • Mfr. Part No. DS1E-S-DC12V
Subtotal (1 unit)
HK$53.50
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)
HK$1,776.90
In Stock
Phoenix Contact DIN Rail Power Relay, 24 V dc Coil, 6 A Switching Current, 4PDT
  • RS Stock No. 794-3812
  • Mfr. Part No. 2903677
Subtotal (1 unit)
HK$60.80
In Stock
Better World
Schneider Electric Harmony Time Series DIN Rail Timer Relay, 1-Contact, 24 to 240 V dc 240 V ac, 24 V ac, 1-Function,
  • RS Stock No. 896-8673
  • Mfr. Part No. RE22R1AMR
Subtotal (1 unit)
HK$595.70
In Stock
Relpol 8 Way 300 V ac DIN Rail Relay Socket, for use with R15 Relay
  • RS Stock No. 123-2056
  • Mfr. Part No. GZP8-BLACK
Subtotal (1 unit)
HK$52.30
In Stock
Relpol Power Relay, 24 V dc Coil, 6 A Switching Current, 4PDT
  • RS Stock No. 123-2076
  • Mfr. Part No. R4N-2014-23-1024-WTL
Subtotal (1 unit)
HK$58.90
In Stock
Allen Bradley 440R/MSR127T, 24 V ac/dc Safety Relay, 3 Safety Contacts, 1
  • RS Stock No. 873-2222
  • Mfr. Part No. 440R-N23126
Subtotal (1 unit)
HK$2,125.40
1
2
3
995
Results per page

Related links