Jual Relay

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A relay is an electrically operated switch. It consists of a set of input terminals for a single or multiple control signals, and a set of operating contact terminals. The switch may have any number of contacts in multiple contact forms, such as make contacts, break contacts, or combinations thereof.

Relays are used where it is necessary to control a circuit by an independent low-power signal, or where several circuits must be controlled by one signal. Relays were first used in long-distance telegraph circuits as signal repeaters: they refresh the signal coming in from one circuit by transmitting it on another circuit. Relays were used extensively in telephone exchanges and early computers to perform logical operations.

  • Rated Voltage: 12, 24, 100/110, 110/120, 220/240 VAC & 12, 24, 48, 100/110 VDC
  • Rated Current: up to 20+ amperes

Relays are used wherever it is necessary to control a high power or high voltage circuit with a low power circuit, especially when galvanic isolation is desirable. The first application of relays was in long telegraph lines, where the weak signal received at an intermediate station could control a contact, regenerating the signal for further transmission.

High-voltage or high-current devices can be controlled with small, low voltage wiring and pilots switches. Operators can be isolated from the high voltage circuit. Low power devices such as microprocessors can drive relays to control electrical loads beyond their direct drive capability. In an automobile, a starter relay allows the high current of the cranking motor to be controlled with small wiring and contacts in the ignition key.

  • Ag (fine silver)
  • AgCu (silver copper)
  • AgCdO (silver cadmium oxide)
  • AgW (silver tungsten)
  • AgNi (silver nickel)
  • AgPd (silver palladium)
  • Platinum, Gold and Silver Alloys
  • SPST – Single Pole Single Throw
  • SPDT – Single Pole Double Throw
  • DPST – Double Pole Single Throw
  • DPDT – Double Pole Double Throw

Source : Wikipedia, electronics-tutorials

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