ALZ21B4HW

Turn On Voltage (Max):	3.15 VDC
Coil Resistance:	50.6 Ohms
Coil Power:	400 mW
Contact Material:	Silver Tin Oxide (AgSnO)
Operating Temperature:	-40°C ~ 85°C
Termination Style:	PC Pin
Mounting Type:	Through Hole
Features:	Insulation - Class B, Sealed - Flux Protection
Release Time:	5ms
Operate Time:	15ms
Turn Off Voltage (Min):	0.45 VDC
Series:	ALZ
Switching Voltage:	440VAC - Max
Contact Rating (Current):	16A
Contact Form:	SPST-NO (1 Form A)
Coil Voltage:	4.5VDC
Coil Current:	88.9mA
Coil Type:	Non Latching
Relay Type:	General Purpose
Part Status:	Obsolete
Packaging:	Bulk

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Power Relays, Over 2 Amps

ALZ21B4HW is a type of power relay. It is designed to protect electrical circuits from high current and over-current protection, by controlling the switching of internal circuit loads. It has a wide application field, the typical application including motor control, communications, instrumentation, automotive and industrial control systems. It is capable of controlling current up to 2 amperes.

Design

The design of ALZ21B4HW has been optimized to minimize power loss, thereby maximizing efficiency. The relay is housed in a dust-proof casing and is capable of high mechanical durability. It is equipped with an LED indicator to indicate the ON/OFF status of the component. This LED indicator also indicates any circuit faults or improper wiring within the system.

Working Principle

The working principle of ALZ21B4HW is triggered when the controlling terminal is connected to the respective circuit breaker states, the voltage passing through its terminals will create a magnetic field which interacts with the internal electromagnet. This interaction will cause the contacts of the relay to close, thus allowing current to flow through the system and into the load. On the other hand, if the controlling terminal is disconnected, the magnetic field will collapse, causing the relay contacts to open, preventing the current from flowing into the load.

Features

The ALZ21B4HW relay offers a powerful control system with a rating of up to 2 amperes. It is designed to facilitate quick and easy installation, and is compatible with any circuit breaker. It is also capable of self-checking the voltage standings, thus reducing the possibility of any circuit failure. Overall, the ALZ21B4HW is an ideal solution for effective protection from high-current and over-current faults. With its highly-efficient design, easy installation and simple control, it is the perfect choice for a wide range of applications.

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