View 2sa1531 e datasheet:

Transistor 2SA1531, 2SA1531A Silicon PNP epitaxial planer type For low-frequency and low-noise amplification Unit: mm Complementary to 2SC3929 and 2SC3929A Features 2.1± 0.1 Low noise voltage NV. 0.425 1.25± 0.1 0.425 High foward current transfer ratio hFE. S-Mini type package, allowing downsizing of the equipment and 1 automatic insertion through the tape packing and the magazine 3 packing. 2 Absolute Maximum Ratings (Ta=25?C) Parameter Symbol Ratings Unit Collector to 2SA1531 –35 VCBO V base voltage 2SA1531A –55 Collector to 2SA1531 –35 VCEO V 0.2± 0.1 emitter voltage 2SA1531A –55 Emitter to base voltage VEBO –5 V Peak collector current ICP –100 mA 1:Base Collector current IC –50 mA 2:Emitter EIAJ:SC–70 3:Collector S–Mini Type Package Collector power dis