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.

18108 產品顯示為 Relays & Signal Conditioning

排序方式
1 906
有庫存
  • RS庫存編號 287-5329
  • 製造零件編號 7760054131
小計(1 件)
HK$1,621.40
HK$1,621.40/件
有庫存
  • RS庫存編號 714-0032
  • 製造零件編號 V0DDTD1
小計(1 件)
HK$466.50
HK$466.50/件
有庫存
  • RS庫存編號 372-8818
  • 製造零件編號 SKL20240
小計(1 件)
HK$471.00
HK$471.00/件
有庫存
  • RS庫存編號 784-5850
  • 製造零件編號 3SK1211-1BB40
小計(1 件)
HK$3,509.10
HK$3,509.10/件
有庫存
  • RS庫存編號 203-8730
  • 製造零件編號 LZX:PT370024
小計(1 件)
HK$91.34
HK$91.34/件
暫時缺貨
  • RS庫存編號 775-3111
  • 製造零件編號 RGS1A23A25KKE
小計(1 件)
HK$540.50
HK$540.50/件
有庫存
  • RS庫存編號 500-406
  • 製造零件編號 XT17017 2022104-1
小計(1 件)
HK$6.80
HK$6.80/件
有庫存
  • RS庫存編號 225-4629
  • 製造零件編號 093.08.0
小計(1 件)
HK$23.40
HK$23.40/件
有庫存
  • RS庫存編號 666-8097
  • 製造零件編號 93.51.0.024
小計(1 件)
HK$101.00
HK$101.00/件
有庫存
  • RS庫存編號 292-8095
  • 製造零件編號 99.01.9.024.99
小計(1 件)
HK$39.80
HK$39.80/件
有庫存
  • RS庫存編號 658-373
  • 製造零件編號 G2TMPT100L20 24-240VAC/DC
小計(1 件)
HK$1,604.64
HK$1,604.64/件
有庫存
  • RS庫存編號 518-7720
  • 製造零件編號 3RF2310-1BA02
小計(1 件)
HK$1,398.40
HK$1,398.40/件
有庫存
  • RS庫存編號 220-6146
  • 製造零件編號 RJ1S-CLD-D24
小計(1 件)
HK$84.10
HK$84.10/件
暫時缺貨
  • RS庫存編號 291-2191
  • 製造零件編號 HA4875
小計(1 件)
HK$1,049.00
HK$1,049.00/件
暫時缺貨
  • RS庫存編號 225-1623
  • 製造零件編號 G3VM-61ER2
小計(1 管,共 200 件)
HK$13,493.80
HK$67.469/件
有庫存
  • RS庫存編號 271-1906
  • 製造零件編號 MY2-GS-R AC220/240
小計(1 件)
HK$98.50
HK$98.50/件
有庫存
  • RS庫存編號 174-0911
  • 製造零件編號 HE3621A0510
小計(1 包,共 50 件)
HK$949.20
HK$18.984/件
有限的庫存
  • RS庫存編號 884-1262
  • 製造零件編號 RXM040W
小計(1 件)
HK$26.70
HK$26.70/件
有庫存
  • RS庫存編號 884-2473
  • 製造零件編號 MAC04D0100
小計(1 件)
HK$464.70
HK$464.70/件
最後的 RS 庫存
  • RS庫存編號 892-8861
  • 製造零件編號 1122970000
小計(1 件)
HK$256.50
HK$256.50/件
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