H21A3

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
Voltage - Collector Emitter Breakdown (Max): 30V
Current - DC Forward (If): 50mA
Manufacturer: Fairchild Optoelectronics Group
Response Time: 8µs, 150µs


Features:

• Opaque housing
• Low cost
• .035" apertures
• High I _C(ON)




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	30	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.

Product	Product status	Eco Status	Pricing*	Package type	Leads	Packing method	Package Drawing
H21A3	Full Production	RoHS Compliant	$0.57	Slotted Switch	4	RAIL	TBD

* Fairchild 1,000 piece Budgetary Pricing

** A sample button will appear if the part is available through Fairchild's on-line samples program. If there is no sample button, please contact a Fairchild distributor to obtain samples

Description

The H21A1, H21A2 and H21A3 consist of a gallium arsenide infrared emitting diode coupled with a silicon phototransistor in a plastic housing. The packaging system of H21A1, H21A2 and H21A3  is designed to optimize the mechanical resolution, coupling efficiency, ambient light rejection, cost and reliability. The gap in the housing provides a means of interrupting the signal with an opaque material, switching the ou tput from an "ON" to an "OFF" state.

Parameters:

Technical/Catalog Information	H21A3
Vendor	Fairchild Semiconductor
Category	Sensors, Sensor Evaluation Kits
Mounting Type	Through Hole
Type	Slot Type
Forward Voltage (Vf)	1.700 VDC [Max]
Forward Current	50.00 mA [Max]
Collector Emitter Voltage (Vceo)	30.0 VDC [Max]
Collector Current (Ic)	4.00 mA [Min]
Collector Current (Ic)	20.00 mA [Max]
Slot Width	3.150 mm [Nom]
Termination Style	PC Pin
Fall Time	50.000 s [Typ]
Rise Time	8.00 s [Typ]
Forward Current	20.00 mA @ 5.0 V
Lead Spacing	7.240 mm [Nom]
Output Type	Transistor
Lead Free Status	Lead Free
RoHS Status	RoHS Compliant
Other Names	H21A3 H21A3