Excellent Integrated System LIMITED (EIS LIMITED), Established in 1991, is a professional independent stocking distributor of electronic components and specialize in buying the EXCESS STOCK from the original equipment manufacturers (OEMs), Contract equipment manufacturers (CEMs), and many other factories. EIS has gained good experiences in Excess Inventory Management through its development over 20 years and has become the reliable partner for the domestic and foreign OEM manufacturers. If any inquiry and question,please email us: john(at)eis-ic.com.

Description as follow:

The H21A1 is a phototransistor optical interrupter switch. It consists of a gallium arsenide infrared emitting diode coupled with a silicon phototransistor in a plastic housing. The packaging system of H21A1 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.

Parametrics

H21A1 absolute maximum ratings: (1)Operating Temperature: -55 to +100 ℃; (2)Storage Temperature: -55 to +100 ℃; (3)Soldering Temperature (Iron)(2,3 and 4): 240 for 5 sec ℃; (4)Soldering Temperature (Flow)(2 and 3): 260 for 10 sec ℃; (5)Continuous Forward Current: 50 mA; (6)Reverse Voltage: 6 V; (7)Power Dissipation: 100 mW; (8)Collector to Emitter Voltage: 30 V; (9)Emitter to Collector Voltage: 4.5 V; (10)Collector Current: 20 mA; (11)Power Dissipation (TC = 25℃): 150 mW.

Features

H21A1 features: (1)Opaque housing; (2)Low cost; (3).035" apertures; (4)High IC(ON).

Diagrams