Specs side by side
2 parts compared · 3 differing specs across 5 total parameters.
| Parameter | ||
|---|---|---|
| Case | TO-3 (TO-204AA) | TO-220AB |
| Component Category | Power Bipolar Transistors (Linear / Audio) | General-Purpose Power Transistors |
| Market Reality | The 2N3055 NPN and its MJ2955 PNP complement are the linear power pair that ran regulator pass banks, audio output stages and industrial drive circuits for half a century: 60V, 15A, 115W in the TO-3 metal can whose body IS the collector. The family survives in original metal, in the plastic modernization (TIP3055 / TIP2955 in TO-247 at 90W) and in the modern higher-grade parts (2SC5200 / 2SA1943 class) - and the substitution traps scale with age: a mounting change disguised as an electrical equivalent, a dissipation derate hidden in the package, and a re-marking market that has targeted this exact can for decades. | The TIP41C / TIP42C pair is the general-purpose linear and switching workhorse of a generation of amplifiers, regulators and drive stages - the TO-220 answer to the classic 2N3055, with a tenth of the base drive requirements of the Darlington family and a real gain that has to be respected. The repairs that go wrong on this pair go wrong in three ways: fitted as an upgrade for a Darlington position (the base drive disappears), gain group swapped without checking (hFE 15 to 75 is a wide field), and the 2N3055 antique traded in without doing the mechanical and voltage arithmetic of the TO-3-to-TO-220 move. |
| Role In Circuit | Original Reference Part | Original Reference Part |
| Sourcing Status | Active Shenzhen Spot Sourcing (24–48h) | Active Shenzhen Spot Sourcing (24–48h) |
Parts
- 2N3055 / MJ2955 · stmicroelectronics
- TIP41C / TIP42C · stmicroelectronics