H21A4
Fairchild Semiconductor
Fairchild Semiconductor
TRANSISTOR OUTPUT SLOTTED SWITCH
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H21A4
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Product details
Experience reliable object detection with the H21A4 slot-type photointerrupter from Fairchild Semiconductor. This optical sensor combines an infrared LED and phototransistor in a practical slot design, with transistor output for easy connection to control circuits. The H21A4 delivers consistent performance with features such as high sensitivity, minimal power consumption, and robust construction for industrial environments. It finds perfect application in ticket reader mechanisms for transit systems, production line item counting, and security system access control monitoring. The H21A4's precision and reliability make it an excellent choice for engineers seeking quality optical sensing solutions. Contact us now for volume pricing, lead times, and technical support to implement the H21A4 in your next project.
General specs
- Product Status: Obsolete
- Sensing Distance: 0.118" (3mm)
- Sensing Method: Through-Beam
- Output Configuration: Phototransistor
- Current - DC Forward (If) (Max): 50 mA
- Current - Collector (Ic) (Max): 20 mA
- Voltage - Collector Emitter Breakdown (Max): 55 V
- Response Time: 8µs, 50µs
- Operating Temperature: -55°C ~ 100°C
- Mounting Type: Through Hole, Flange
- Package / Case: Slotted, PC Pins
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