OC170

The OC170 is an alloy diffused germanium PNP transistor.

It has a breakdown voltage of about 20 V and a maximum collector current of 10 mA. Beta is typically 150, f_t about 60 MHz.

The OC170 was developed by Philips and introduced in the late 1950s.

Due to tin whiskers growing inside the case, OC170s a common source of problems on equipment of the period.

Links

• Thread on tin whiskers in OC170/OC171 @ vintage-radio.net / Detail pictures

Data

• Mullard OC170 Datasheet (PDF)