MJ2955

MJ2955 is a high-current PNP power transistor, the complementary partner to the NPN MJ3055 (and TIP3055). It’s commonly used as a pass element in regulators or as a power switch in vintage gear.
Key points:
- Type: PNP silicon power transistor
- Package: often TO-3 metal can (case is the collector); base and emitter are the two leads
- Ratings (typical): Vceo ≈ 60 V, Ic ≈ 15 A; Ptot ≈ 60–75 W with proper heatsinking
- Applications: power regulators, emitter-follower power stages, switching/regulator circuits, audio amplifiers
- Operation: emitter for the most positive rail, opposite polarity to NPN devices; requires correct biasing and adequate heat sinking
Note: is the complement of MJ3055. Check the exact datasheet for current/voltage limits and derating, as actual figures vary by lot and package.

MJ2955 is a PNP power transistor (60 V, ~11 A) complementary to 2N3055. Direct equivalents include:
- TIP2955
- 2N2955
- MJE2955
These are the common cross-refs used as substitutes.

MJ2955 features:
- PNP silicon power transistor
- Complement of TIP3055 (NPN)
- Vceo ≈ 60 V
- Ic up to ~15 A
- High power handling with good heatsinking; metal case is the collector
- Package options: TO-3 (metal can) or TO-220
- Moderate to high current gain (hFE ≈ 20–60 depending on Ic)
- Suitable for audio power amplifiers, voltage regulators, and switching applications

- Pin count: 3 terminals (base, emitter, and collector). In a TO-3 package, the collector is the case (metal body).
- Function: PNP power transistor used for high-current amplification and switching; complementary to the NPN MJ3055.

- Manufacturer: Motorola.
- What kind of company: an American multinational electronics and telecommunications company; a major producer of semiconductors. Its semiconductor division became Freescale, which was later acquired by NXP.

- High-current PNP power transistor (complement to TIP3055; ~60 V, ~15 A).
- Push-pull Class AB audio amplifier output stage (with TIP3055).
- Linear regulators and power-supply pass elements (series regulator applications).
- Power switching/regulator circuits and motor-drive stages requiring high current.
- General-purpose high-current switch in 60 V range for discrete power circuits.

TO-3 metal can package. (MJ2955 is a PNP power transistor, complementary to the TIP3055.)