B1566 Datasheet – (-60V, -3A) PNP Power Transistor – Rohm

Part Number: B1566, 2SB1566

Function: (-60V, -3A) PNP Power Transistor

Package: TO-220FN type

Manufacturer: Rohm

Images:B1566 pdf pinout


The B1566 is -60V, -3A, PNP Silicon Epitaxial Planar Transistor.

A PNP transistor is a type of bipolar junction transistor (BJT) with a different structure and polarity compared to an NPN transistor.

Here are characteristics of PNP transistors:

1. Structure: A PNP transistor has a sandwich-like structure, consisting of a thin N-type layer (base) sandwiched between two P-type layers (emitter and collector).

2. Polarity: In a PNP transistor, the majority charge carriers are holes, which flow from the emitter to the collector. The emitter is negative relative to the base, and the collector is positive relative to the base.

3. Current flow: When a small current is applied to the base terminal, it allows a much larger current to flow from the emitter to the collector. This is called amplification or gain, and it makes the PNP transistor useful as an electronic switch or amplifier.


1) Low VCE (sat).
2) Wide SOA

1) Relay drive
2) DC-DC converter
3) Stabilized power supply


Silicon PNP transistors offer advantages such as high gain, low noise, and good thermal stability. They are widely used in many applications, including audio amplifiers, power supplies, voltage regulators, and digital logic circuits.


Appendix Notes No technical content pages of this document may be reproduced in any form or transmitted by any means without prior permission of ROHM CO.,LTD. The contents described herein are subject to change without notice. The specifications for the product described in this document are for reference only. Upon actual use, therefore, please request that specifications to be separately delivered.

Application circuit diagrams and circuit constants contained herein are shown as examples of standard use and operation. Please pay careful attention to the peripheral conditions when designing circuits and deciding upon circuit constants in the set. Any data, including, but not limited to application circuit diagrams information, described herein are intended only as illustrations of such devices and not as the specifications for such devices. ROHM CO.,LTD. disclaims any warranty that any use of such devices shall be free from infringement of any third party’s intellectual property rights or other proprietary rights, and further, assumes no liability of whatsoever nature in the event of any such infringement, or a […]

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