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BZX55C15

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ST(Semtech) Zener Diodes, DO-35. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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BZX55C15

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, primary claude-sonnet-5-5 (text), consensus claude-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).

Datasheet PDF