H21A4

Series: -
Sensing Distance: 0.118" (3mm)
Sensing Method: Transmissive
Output Configuration: Phototransistor
Current - Collector (Ic) (Max): 20mA
Mounting Type: Through Hole
Package / Case: PCB Mount
Packaging: Tube
Current - DC Forward (If): 50mA
Manufacturer: Fairchild Optoelectronics Group
Response Time: 8µs, 50µs
Voltage - Collector Emitter Breakdown (Max): 55V


Features:

• Opaque housing
• Low cost
• .035" apertures
• High I  _cON)


Specifications

Parameter	Symbol	Rating	Unit
Operating Temperature	T OPR	-55 to +100	°C
Storage Temperature	T STG	-55 to +100	°C
Soldering Temperature (Iron) (2,3 and 4)	T SOL-I	240 for 5 sec	°C
Soldering Temperature (Flow) (2 and 3)	T SOL-F	260 for 10 sec	°C
INPUT (EMITTER) Continuous Forward Current	IF	50	mA
Reverse Voltage	VR	6	V
Power Dissipation (1)	PD	100	mW
OUTPUT (SENSOR) Collector to Emitter Voltage	V CEO	55	V
Emitter to Collector Voltage	V ECO	4.5	V
Collector Current	IC	20	mA
Power Dissipation (TC = 25°C) (1)	PD	150	mW

1. Derate power dissipation linearly 1.67 mW/°C above 25°C.
2. RMA flux is recommended.
3. Methanol or isopropyl alcohols are recommended as cleaning agents.
4. Soldering iron tip 1/16" (1.6mm) minimum from housing.


Description

The H21A series are gallium arsenide infrared emitting diode coupled with a silicon photodarlington in a plastic housing. The pckaging system of H21A series  is designed to optimize the mechanical resolution, coupling efficiency, ambient light rejection, cost and rliability. The gap in the housing provides a means of interrupting the signal with an opaque material, switching the output rom an "ON" to an "OFF" state.

Parameters:

Technical/Catalog Information	H21A4
Vendor	Fairchild Semiconductor
Category	Sensors, Sensor Evaluation Kits
Lead Free Status	Lead Free
RoHS Status	RoHS Compliant
Other Names	H21A4 H21A4