Designed as a miniaturized surface-mount device for infrared detection in sensing applications, OPTEK Technology (Carrollton, TX) has developed a series of NPN silicon phototransistors in 1206 chip packages. The devices are packaged with a flat molded lens; the OP520 features an opaque lens to shield it from ambient light, while the OP521 lens is water clear, giving it a wider response range. The devices exhibit response times of 15 μs with peak response to 880-nm light. Electrical performance of the OP520/521 Series is characterized by collector-emitter voltages of 30 V, emitter-collector voltage of 5 V, collector current of 20 mA and power dissipation of 75 mW at 25 °C. They are RoHS-compliant and are compatible with high-temperature (260 °C), lead-free soldering processes. Rated for operation from -25 °C to +85 °C, the phototransistors are designed to be mechanically and spectrally matched to OPTEK’s OP250 series surface mount infrared LEDs.

Photonics Tech Briefs Magazine

This article first appeared in the March, 2006 issue of Photonics Tech Briefs Magazine.

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