A relay is an electronic control device, which can automatically switch a controlled circuit to make a difference when given an input value like electrical, magnetic, optical or thermal signals. When the input value drops to a certain extent, it will return to the initial state and then the controlled circuit will also go back to the original state. It has the interaction between control system (input circuit) and the controlled system (the output circuit). Relays are usually used in automatic control circuits, as the automatic switches which actually can control a larger current by placing a smaller current. Therefore, it plays a role of automatic adjustment, safety protection, conversion circuit in the electric circuit. As one of the most important control elements, it is widely applied in remote control, telemetry, communication, automatic control, mechatronics and power electronics.
Low price thermal overload relay for sale. 8 current setting ranges for selection, minimum 0.1A, maximum 6A, rated operational current 25A, rated working voltage 3-phase 220V~690V, insulation voltage 690V, phase failure protection function, matching 9A contactor and 2A gG fuse breaker.
Low price 3 phase voltage monitoring relay with SPDT (1 C/O) contact, used for monitoring phase failure/loss, phase sequence, phase unbalance, overvoltage and undervoltage at the rated voltage of AC 220V, 380V, 440V, 460V, or 480V 50/60Hz, LED lights indicating working state, compact size and DIN rail mounting, provide a safe protection for electric motors, air compressors, pumps and other equipment or devices.
General purpose electromagnetic relay, 11 pins, 3PDT contact type, available for the common coil voltages of 12V DC, 24V DC, 110V AC and 220V AC, rated load 5A/240V AC 28V DC, compact size, favorable price and high quality.
Electromagnetic relay features with 8 pins, DPDT(Double Pole Double Throw), clear and plastic housing. The coil voltages of 12V DC, 24VDC, 110V AC and 220V AC are available with contact load 5A/240V AC 28V DC and widely used in automatic control system.
Low cost safety relay 24V DC/AC for sale, AC supply voltage 24V, 42V, 115V, 120V, 230V, or 240V, DC supply voltage 24V, frequency 50-60Hz. Safety relay with high-performance, safely control the environment around any time to monitor.
Cheap thermal overload relay for sale. 4 ranges of current setting for selection, 10~18 Amp, current rating 25A, working voltage 3-phase 220V~690V, insulation voltage 690V, phase failure protection function, suits 9A contactor and 4~20A gG fuse breaker.
DC voltage monitoring relay with 2 C/O contacts (2 Form C or DPDT) provide protection for the equipment from undervoltage and overvoltage in DC circuit 12V, 24V, 36V or 48V, adjustable trip delay time, LED indicator for working state, DIN rail mounting, compact design, good quality and low price.
Safety relay is mainly used for AC 50-60Hz, supply voltage 24VAC/DC, safety contacts 3NO, auxiliary contact 1NC, AC power consumption 2.2VA, DC power consumption 2W. Extremely light, good value for money, direct sales from the manufacturer and free shipping.
Single phase voltage monitoring relay, suitable for undervoltage and overvoltage monitoring of DC 12V, AC/DC 24-48V or AC/DC 110V-240V, adjustable delay time, compact size relay with 1 CO & 1 NC contacts, real-time LCD for voltage, operation and fault status display, DIN rail mounting, high quality and low cost.
Affordable price thermal overload relay for sale. Current setting range 23~32 Amp or 28~35 Amp for selection, working current rating 36A, power supply 3-phase 220V~690V, insulation voltage 690V, matches 25A contactor, 63A gG fuse breaker, overcurrent and phase failure protection for AC motors.
Thermal overload relay provides overcurrent and phase failure protection for AC motors. Current setting range 30-40Amp or 37-50Amp for selection, current rating 93A, working voltage 3-phase 220V~690V, insulation voltage 690V, matching 40A contactor and 63A/100A gG fuse breaker.