component
BC337-25
Public Made by Adomby adom
Changjing Bipolar (BJT), TO-92. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownBC337-25
Changjing · Bipolar (BJT) · TO-92
BC337-25 from Changjing, 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 | COLLECTOR | passive | Collector terminal of the NPN transistor; the datasheet rates collector-emitter voltage VCEO at 45 V (BC337) and continuous collector current IC at 800 mA. |
| 2 | BASE | passive | Base terminal of the NPN transistor; the datasheet specifies VBE(sat) of 1.2 V at IC=500 mA, IB=50 mA. |
| 3 | EMITTER | passive | Emitter terminal of the NPN transistor; the datasheet specifies emitter-base voltage VEBO of 5 V. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Changjing |
| 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 hFE(1), BC337-25 group | hFE(1) | 160 | 400 | VCE=1V, IC= 100mA | 1 | ||
| Collector-base breakdown voltage (BC337) | VCBO | 50 | V | IC= 100uA, IE=0 | 1 | ||
| Collector-emitter breakdown voltage (BC337) | VCEO | 45 | V | IC= 10mA, IB=0 | 1 | ||
| Emitter-base breakdown voltage | VEBO | 5 | V | IE= 10uA, IC=0 | 1 | ||
| Collector cut-off current (BC337) | ICBO | 0.1 | uA | VCB= 45V, IE=0 | 1 | ||
| Collector cut-off current (BC337) | ICEO | 0.2 | uA | VCE= 40V, IB=0 | 1 | ||
| Emitter cut-off current | IEBO | 0.1 | uA | VEB= 4 V, IC=0 | 1 | ||
| DC current gain hFE(2) | hFE(2) | 60 | VCE=1V, IC= 300mA | 1 | |||
| Collector-emitter saturation voltage | VCE(sat) | 0.7 | V | IC=500mA, IB= 50mA | 1 | ||
| Base-emitter saturation voltage | VBE(sat) | 1.2 | V | IC= 500mA, IB=50mA | 1 | ||
| Base-emitter voltage | VBE | 1.2 | V | VCE=1V, IC= 300mA | 1 | ||
| Transition frequency | fT | 210 | MHz | VCE= 5V, IC= 10mA, f = 100MHz | 1 | ||
| Collector output capacitance | Cob | 15 | pF | VCB=10V, IE=0, f=1MHz | 1 | ||
| Collector-base voltage (absolute maximum, BC337) | VCBO | 50 | V | Ta=25℃ (maximum ratings header) | 1 | ||
| Collector-emitter voltage (absolute maximum, BC337) | VCEO | 45 | V | Ta=25℃ (maximum ratings header) | 1 | ||
| Emitter-base voltage (absolute maximum) | VEBO | 5 | V | Ta=25℃ (maximum ratings header) | 1 | ||
| Collector current, continuous (absolute maximum) | IC | 800 | mA | Continuous, Ta=25℃ (maximum ratings header) | 1 | ||
| Total device dissipation (absolute maximum) | PD | 625 | mW | Ta=25℃ (maximum ratings header) | 1 | ||
| Junction temperature (absolute maximum) | Tj | 150 | ℃ | 1 | |||
| Storage temperature | Tstg | -55 | 150 | ℃ | 1 |
CAD (KiCad official)
- Symbol:
BC337-25 - Footprint:
Package_TO_SOT_THT:TO-92_Inline - 3D model: TO-92 (KiCad packages3D, STEP)
- 3D model files:
bc337-25-etched.step/bc337-25-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);bc337-25.step/bc337-25.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Changjing datasheet (2 pp, sha256
d08d24484cb68faf, retrieved 2026-10-18, 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).