Product Overview
Legacy 2N1545A PNP Power Transistor for Vintage Equipment
This component is a high-power transistor intended for demanding linear control roles in earlier electronic systems. Commonly encountered in mid-20th-century industrial and military electronics, devices of this class were engineered for robustness rather than miniaturization. When maintaining older hardware, matching the original transistor family and polarity is often critical, and careful verification against original documentation remains a best practice. These parts represent the germanium / early solid-state era of power electronics.
Product Condition
Unused, New Old Stock. This transistor has not been installed or placed into service and has been stored as original inventory from the period of manufacture.
Product Overview
The Solid State, Inc. 2N1545A is a legacy PNP power transistor from the JEDEC 2N1545 family. It is associated with high-dissipation germanium power devices used in audio amplification, linear regulation, and industrial control circuits. Parts carrying this designation were supplied by multiple U.S. manufacturers for OEM and government-supported programs. Today, the 2N1545A is primarily sought for form-fit-function replacement in vintage equipment.
Key Features
- PNP polarity power transistor
- Germanium semiconductor technology
- JEDEC 2N1545 family designation
- Designed for high power dissipation applications
- Intended for linear amplification and pass-regulator roles
- Legacy component used in industrial and military electronics
- Supplied by Solid State, Inc. and equivalent period manufacturers
Applications
- Restoration of vintage audio power amplifiers
- Repair of linear power supplies
- Industrial control and servo electronics maintenance
- Military or aerospace legacy hardware support
- Form-fit-function replacement in older transistorized equipment
Frequently Asked Questions
What type of transistor is the 2N1545A?
It is a PNP power transistor based on germanium technology, intended for high-dissipation linear applications.
Is this suitable for new circuit designs?
This device is generally used for replacement or restoration of existing designs rather than new development.
Are full electrical specifications available?
Publicly available primary datasheets for the 2N1545A variant are limited; original equipment documentation should be consulted for critical parameters.
What makes this part valuable today?
Its value lies in maintaining or restoring equipment that was originally designed around the 2N1545 family of power transistors.
You can restore a vintage audio power amplifier or linear power supply by installing this PNP germanium power transistor into the original heatsink or chassis mounting position specified by the equipment design.
