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BZX55C15
Public Made by Adomby adom
ST(Semtech) Zener Diodes, DO-35. 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
markdownBZX55C15
ST(Semtech) · Zener Diodes · DO-35
BZX55C15 from ST(Semtech), in a DO-35. 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 | K | passive | Cathode, marked by the cathode band on the DO-35 glass case; connect to the positive side in Zener (reverse) operation, with Zener voltage 13.8...15.6 V at IZT = 5 mA for the BZX55C15. |
| 2 | A | passive | Anode lead at the end opposite the cathode band of the DO-35 glass case; forward voltage max 1 V at IF = 100 mA. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | ST(Semtech) |
| Package | DO-35 |
| Category | Diodes |
| Pins | 2 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Dynamic Resistance | ZZT | 30 | Ω | at IZT = 5 mA | 2 | ||
| Dynamic Resistance | ZZK | 110 | Ω | at IZK = 1 mA | 2 | ||
| Reverse Leakage Current | IR | 0.1 | µA | Ta = 25℃, VR = 11 V | 2 | ||
| Reverse Leakage Current | IR | 2 | µA | Ta = 125℃, VR = 11 V | 2 | ||
| Forward Voltage | VF | 1 | V | at IF = 100 mA, Ta = 25℃ | 1 | ||
| Thermal Resistance Junction to Ambient Air | RthA | 0.3 | K/mW | Leads kept at ambient temperature at a distance of 8 mm from case, Ta = 25℃ | 1 | ||
| Power Dissipation | Ptot | 500 | mW | Ta = 25℃, leads kept at ambient temperature at 8 mm from case | 1 | ||
| Junction Temperature | Tj | 175 | ℃ | Ta = 25℃ | 1 | ||
| Storage Temperature Range | Tstg | -55 | 175 | ℃ | Ta = 25℃ | 1 |
CAD (KiCad official)
- Symbol:
BZX55C15 - Footprint:
Diode_THT:D_DO-35_SOD27_P7.62mm_Horizontal - 3D model: DO-35 (KiCad packages3D, STEP)
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: ST(Semtech) datasheet (3 pp, sha256
3ab833a5f9e705aa, retrieved 2026-10-22, tier: manufacturer) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-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).