component
BC337-25BK
Public Made by Adomby adom
DIOTEC Bipolar (BJT), TO-92. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
Made with KiCad 10.0 · needs KiCad 10.0 or later to open · KiCad file format 20260206
| Name | Last updated |
|---|---|
| docs | 16d ago |
| viewers | 16d ago |
| bc337-25bk-etched.glb | 16d ago |
| bc337-25bk-etched.step | 16d ago |
| bc337-25bk-hero.glb | 16d ago |
| bc337-25bk-hero.overlay.json | 16d ago |
| bc337-25bk.glb | 16d ago |
| bc337-25bk.kicad_mod | 16d ago |
| bc337-25bk.kicad_sym | 16d ago |
| bc337-25bk.lbr | 16d ago |
| bc337-25bk.step | 16d ago |
| package.json | 16d ago |
| page.json | 16d ago |
| README.md | 16d ago |
BC337-25BK
DIOTEC · Bipolar (BJT) · TO-92
BC337-25BK from DIOTEC, in a TO-92. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | C | passive | Collector terminal; the datasheet rates the collector DC current at IC 800 mA and peak at ICM 1 A, with VCES 50 V for BC337. |
| 2 | B | passive | Base terminal; the datasheet rates the base current at IB 100 mA maximum. |
| 3 | E | passive | Emitter terminal; the datasheet rates the emitter-base voltage at VEBO 5 V with collector open. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | DIOTEC |
| Package | TO-92 |
| Category | Transistors/Thyristors |
| Pins | 3 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| DC current gain, group -25 | hFE | 160 | 250 | 400 | VCE = 1 V, IC = 100 mA | 1 | |
| DC current gain, group -25 | hFE | 100 | 200 | VCE = 1 V, IC = 300 mA | 1 | ||
| Collector-Emitter saturation voltage | VCEsat | 0.7 | V | IC = 500 mA, IB = 50 mA | 1 | ||
| Base-Emitter voltage | VBE | 1.2 | V | VCE = 1 V, IC = 300 mA | 2 | ||
| Collector-Emitter cutoff current (BC337) | ICES | 2 | 100 | nA | VCE = 45 V, (B-E short) | 2 | |
| Collector-Emitter cutoff current at Tj=125°C (BC337) | ICES | 10 | µA | VCE = 45 V, Tj = 125°C, (B-E short) | 2 | ||
| Thermal resistance junction to ambient air | RthA | 200 | K/W | Valid if leads kept at ambient temperature at 2 mm from case | 2 | ||
| Collector-Emitter voltage (E-B short) | VCES | 50 | V | E-B short, BC337 | 1 | ||
| Collector-Emitter voltage (B open) | VCEO | 45 | V | B open, BC337 | 1 | ||
| Emitter-Base voltage | VEBO | 5 | V | C open | 1 | ||
| Power dissipation | Ptot | 625 | mW | Valid if leads kept at ambient temperature at 2 mm from case | 1 | ||
| Collector current (DC) | IC | 800 | mA | 1 | |||
| Peak collector current | ICM | 1 | A | 1 | |||
| Base current | IB | 100 | mA | 1 | |||
| Junction temperature | Tj | -55 | 150 | °C | 1 | ||
| Storage temperature | TS | -55 | 150 | °C | 1 |
Materials and finish
As the datasheet states them (page.json metadata.appearance; the 3D model's colours follow it).
| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| contacts | silver | affect human life or health, user shall contact in advance Diotec Semiconductor AG's Managing Board (Heitersheim, Germany) to | 3 |
CAD (KiCad official)
- Symbol:
BC337-25BK - Footprint:
Package_TO_SOT_THT:TO-92_Inline - 3D model: TO-92 (KiCad packages3D, STEP)
- 3D model files:
bc337-25bk-etched.step/bc337-25bk-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);bc337-25bk.step/bc337-25bk.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: DIOTEC datasheet (3 pp, sha256
c12517977d008a8a, retrieved 2026-10-19, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(text), consensusclaude-sonnet-5-5(agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish. - CAD: KiCad official libraries (CC-BY-SA 4.0).