H21A2

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

Product	Product status	Eco Status	Pricing*	Package type	Leads	Packing method	Package Drawing
H21A2	Full Production	RoHS Compliant	$0.53	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

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.




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 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 output from an "ON" to an "OFF" state.

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 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	H21A2
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)	2.00 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	H21A2 H21A2