H21A6

Series:	--
Packaging:	Tube
Part Status:	Obsolete
Sensing Distance:	0.118" (3mm)
Sensing Method:	Transmissive
Output Configuration:	Phototransistor
Current - DC Forward (If) (Max):	50mA
Current - Collector (Ic) (Max):	20mA
Voltage - Collector Emitter Breakdown (Max):	55V
Response Time:	8µs, 50µs
Operating Temperature:	-55°C ~ 100°C
Mounting Type:	Through Hole, Flange
Package / Case:	Slotted, PC Pins
Type:	Unamplified

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

?

Introduction

The H21A6 Optoelectronic switch is a type of slot type photointerrupter with transistor output. Optoelectronic switches are devices that can detect and actuate an electronic signal when a light beam passes through the slot type photointerrupter. This article will discuss the application field and working principle of the H21A6 Optoelectronic switch.

Application Field

The H21A6 Optoelectronic switch is designed to be effective in a wide range of industrial and consumer applications. This includes applications such as automatic doors, motorized chairs, factory automation, and medical equipment. This type of switch can also be used in automotive electronics, security systems, and robotics. These switches are designed with a narrow gap that enables accurate detection of a light beam passing through the gap.

Design Specifications

The H21A6 Optoelectronic switch is designed with a bayonet connection for easy installation. It is made up of an LED light source and a phototransistor which is connected in series with a pull-up resistor. The LED light source is mounted in a cylindrical plastic case to form an L-shape. The light from the LED passes through the slot and is received by the phototransistor. The electrical signals are then amplified by the transistor and sent to the pull-up resistor.

Working Principle

The working principle of the H21A6 Optoelectronic switch is based on the principle of photoelectricity. When the light beam passes through the gap, it strikes the phototransistor, generating a small electrical current. This current is amplified by the transistor and sent to the pull-up resistor, which then sends a signal to the circuit. When the light is interrupted, the flow of current stops and the signal sent from the pull-up resistor changes, activating the switch in the circuit. This switch can be used to control various types of devices within a circuit, such as relays, solenoids, and motors.

Conclusion

The H21A6 Optoelectronic switch is a type of slot type photointerrupter with transistor output. This switch can be used in a wide range of applications, including factory automation, medical equipment, security systems, and robotics. The working principle of the switch is based on the principle of photoelectricity, using a light beam passing through a gap to generate a small electrical current. The current is then amplified and sent to a pull-up resistor, which activates the switch within the circuit.

The specific data is subject to PDF, and the above content is for reference

Part Number	Manufacturer	Price	Quantity	Description