Series:	RIF
Packaging:	Bulk
Lead Free Status / RoHS Status:	--
Part Status:	Active
Moisture Sensitivity Level (MSL):	--
Relay Type:	General Purpose with Socket
Coil Type:	Non Latching
Coil Current:	18.0mA
Coil Voltage:	24VDC
Contact Form:	SPDT (1 Form C)
Contact Rating (Current):	11A
Switching Voltage:	250VAC, 250VDC - Max
Turn On Voltage (Max):	--
Turn Off Voltage (Min):	--
Operate Time:	8ms
Release Time:	10ms
Features:	Diode, LED Indicator
Mounting Type:	DIN Rail
Termination Style:	Spring Terminal
Operating Temperature:	-40°C ~ 70°C
Contact Material:	Silver Nickel (AgNi)
Coil Power:	--

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Power Relays, Over 2 Amps

Introduction

A power relay is an electrical device used to turn on or off a circuit, or to switch an electrical signal on or off. The relay is turned on or off through the use of a signal, usually from an electrical or electronic controller. The relay is typically used to control high-voltage or high-current circuits from a low voltage circuits. A power relay has a coil, contacts, a core, and a mechanism for transferring the electrical signal from the source circuit to the controlled circuit.Power relays are used widely in industrial and commercial applications to control high-current, high-voltage circuits. The power relays that have a current rating greater than two amps are referred to as "over 2 amps" relays. These relays are used in a variety of applications, from controlling motor starters, pumps, air conditioners, solenoid valves, and other heavy-duty loads.

2903342 Application Field and Working Principle

The 2903342 heavy-duty power relay has current ratings up to 4 amps, making it suitable for heavy-duty applications. This is a miniature panel mount relay with four poles and contacts that are rated up to 4 amps at 28 Volts DC. It features quick-connect terminals for easy wiring and a wide variety of applications. The power relay features a bifurcated contact construction, making it ideal for switching high current and voltage loads such as motor starters, pumps, air conditioners, solenoid valves, and other heavy-duty loads. It utilizes a "hold in" feature which prevents unintentional turning off of the relay when the current load is released. The power relay follows the standard design principle of most power relays. It has an electromagnet core, which when energized, causes the contacts to close. The contacts are typically of bifurcated construction, as mentioned above, with each side connected to a different terminal, which allows switching of high-voltage and high-current loads. The relay is designed to be mounted inside a control panel or on a PCB board, and features a quick-connect terminal for easy wiring. It is protected by a polycarbonate enclosure and has a UL 94 V-2 flammability rating.

Conclusion

The 2903342 heavy-duty power relay is an ideal solution for controlling heavy-duty loads, such as motor starters, pumps, air conditioners, solenoid valves, and other applications. It has four pole contacts and is rated up to 4 amps at 28 Volts DC, and features a bifurcated contact construction and a "hold-in" feature for preventing unintentional power-off of the relay. The relay is designed for mounting on a control panel or PCB board, and is easy to wire with its quick-connect terminal. It is UL 94 V-2 flammability rated, and is a reliable and safe solution for controlling high voltage and current loads.

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Part Number	Manufacturer	Price	Quantity	Description