Recently searched

    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

    15666 Products showing for Relays & Signal Conditioning

    1 of 784
    Phoenix Contact Plug In Power Relay, 125V dc Coil, 4PDT
    • RS Stock No. 857-1377
    • Mfr. Part No. 2903681
    1 Box of 10
    PHP6,232.82
    Omron Plug In Power Relay, 24V dc Coil, 10A Switching Current, DPDT
    • RS Stock No. 488-2610
    • Mfr. Part No. MY2 DC24(S)
    Each
    PHP697.93
    Omron Plug In Power Relay, 240V ac Coil, 5A Switching Current, 4PDT
    • RS Stock No. 488-1819
    • Mfr. Part No. MY4IN AC220/240(S)
    Each
    PHP903.05
    Better World
    Siemens Phase Monitoring Relay, 3 Phase, SPDT, 160 → 760V ac, DIN Rail
    • RS Stock No. 149-148
    • Mfr. Part No. 3UG5512-1AR20
    Each
    PHP12,553.06
    Omron H3CR Series Plug In Timer Relay, 100-240/100-125V ac/dc, 2-Contact, 0.05 → 1080000s, DPDT
    • RS Stock No. 264-1622
    • Mfr. Part No. H3CR-A8 AC100-240/DC100-125
    Each
    PHP8,315.56
    Phoenix Contact RIF Series Interface Relay, DIN Rail Mount, 24V dc Coil, DPDT, 2-Pole
    • RS Stock No. 794-3702
    • Mfr. Part No. 2903315
    Each
    PHP728.93
    Omron Plug In Power Relay, 24V dc Coil, 10A Switching Current, DPDT
    • RS Stock No. 548-4245
    • Mfr. Part No. MY2IN DC24(S)
    Each
    PHP486.67
    Finder Plug In Relay, 24V dc Coil, 8A Switching Current, DPDT
    • RS Stock No. 534-5336
    • Mfr. Part No. 46.52.9.024.0074
    Each
    PHP678.52
    Weidmuller TRS Series Interface Relay, DIN Rail Mount, 24V Coil, SPDT, 1-Pole, 6A Load
    • RS Stock No. 892-8789
    • Mfr. Part No. 1122770000
    Each
    PHP813.79
    Better World
    Schneider Electric Phase, Voltage Monitoring Relay, 3 Phase, DPDT, 380 → 480V ac, DIN Rail
    • RS Stock No. 124-0184
    • Mfr. Part No. RM22TR33
    Each
    PHP12,619.30
    Omron 14 Pin 2250V ac DIN Rail Relay Socket, for use with Miniature Power Relays
    • RS Stock No. 186-4180
    • Mfr. Part No. PYFZ-14-E
    Each
    PHP791.56
    Better World
    Schneider Electric Plug In Power Relay, 24V dc Coil, 8A Switching Current, 4PDT
    • RS Stock No. 884-1313
    • Mfr. Part No. RXM4AB2BD
    Each
    PHP1,016.04
    Omron Plug In Power Relay, 24V dc Coil, 10A Switching Current, DPDT
    • RS Stock No. 488-1960
    • Mfr. Part No. MY2N DC24(S)
    Each
    PHP943.89
    Omron 8 Pin 250V ac DIN Rail Relay Socket, for use with MY2IN, MY2IN1, MY2IN1-D2, MY2IN-CR, MY2IN-D2, MY2N, MY2N1,
    • RS Stock No. 196-6169
    • Mfr. Part No. PYF08A-N
    Each
    PHP572.31
    Omron 11 Pin 250V ac DIN Rail Relay Socket, for use with MK3P-5-I, MK3P-5-S, MK3PD-5-I, MK3PD-5-S, MK3PN-5-I,
    • RS Stock No. 353-663
    • Mfr. Part No. PF113A-E
    Each
    PHP557.84
    RS PRO Plug In Power Relay, 240V ac Coil, 5A Switching Current, 4PDT
    • RS Stock No. 394-9116
    Each
    PHP603.76
    Omron Plug In Power Relay, 24V dc Coil, 5A Switching Current, DPDT
    • RS Stock No. 353-887
    • Mfr. Part No. G2R-2-SN DC24(S)
    Each
    PHP1,077.56
    RS PRO 14 Pin 300V DIN Rail Relay Socket, for use with RS PRO RKE & RKF 14 Pin Relays
    • RS Stock No. 121-7802
    Each
    PHP449.07
    Sensata Crydom 1-DC Series Solid State Relay, 40 A Load, Surface Mount, 100 V Load, 32 V Control
    • RS Stock No. 200-2064
    • Mfr. Part No. D1D40
    Each
    PHP6,386.82
    Finder Plug In Relay, 125V dc Coil, 10A Switching Current
    • RS Stock No. 248-1557
    • Mfr. Part No. 553291250040
    Each (In a Pack of 10)
    PHP1,265.537
    Results per page
    1
    2
    3
    784

    Related links