DAR71210S

Operating Temperature:	-20°C ~ 70°C
Contact Material:	Rhodium (Rh)
Coil Power:	--
Coil Resistance:	150 Ohms
Series:	D
Packaging:	Bulk
Part Status:	Active
Coil Type:	Non Latching
Coil Current:	80.0mA
Coil Voltage:	12VDC
Contact Form:	SPST-NO (1 Form A)
Contact Rating (Current):	3A
Switching Voltage:	1000VAC, 1000VDC - Max
Turn On Voltage (Max):	9 VDC
Turn Off Voltage (Min):	1.25 VDC
Operate Time:	3ms
Release Time:	2ms
Features:	--
Mounting Type:	Chassis Mount
Termination Style:	Quick Connect - 0.250" (6.3mm)

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Introduction

Reed relays are one type of switch that are extremely useful in various applications due to its small size, long life, and reliable switching. Among them is the DAR71210S, a two-pole, single-throw (DPST) reed relay. In this article, its application field and working principle will be discussed.

Descriptions

The DAR71210S is a miniature reed relay that is designed to switch loads up to 0.5A and 500V DC/500V AC. Its coil is rated at 5V DC with a maximum operating voltage of 12V DC. It has a contact resistance of less than 10 milliohms and pick-up time of less than 0.4ms. Additionally, the DAR71210S is highly reliable, with an average mechanical life of 1 million operations, and no endurance limitation.

Applications

The DAR71210S is suitable for any application that requires switching up to 0.5A of current, such as automotive, medical, and industrial applications. It can be used to control a variety of loads, such as motors, lights, and solenoids. The DAR71210S can also be used in temperature detection and computer communication applications.

Working Principle

The working principle of the DAR71210S is based on two ferromagnetic cores that attract each other when a direct current is applied to the coil. The two cores are separated by an air gap, which is bridged by a pair of conductive tines. When the current is applied, the cores are magnetized and the tines are brought into contact, thus closing the switch. When the current is removed, the cores are no longer magnetized and the spring-loaded tines separate, re-opening the switch.

Conclusion

In conclusion, The DAR71210S is a miniature reed relay that is suitable for switching loads up to 0.5A. Its application fields include automotive, medical, industrial, computer communication, and temperature detection applications. The working principle is based on magnetically attracting two cores which bridges the air gap with two conductive tines.

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