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HZ5A1

ST(Semtech) · Zener Diodes · DO-35

HZ5A1 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; HZ5A1 zener voltage is 4.3 V min to 4.5 V max at IZT = 5 mA.
2 A passive Anode of the zener diode (axial lead opposite the cathode band); forward voltage is 1 V max 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
Zener Voltage VZ 4.3 4.5 V at IZT = 5 mA, Ta = 25 °C, tp = 20 ms 2
Reverse Leakage Current IR 5 µA at VR = 1.5 V, Ta = 25 °C 2
Dynamic Resistance ZZT 100 Ω at IZT = 5 mA, Ta = 25 °C 2
Forward Voltage VF 1 V IF = 100 mA, Ta = 25 °C 1
Power Dissipation Ptot 500 mW Ta = 25 °C 1
Junction Temperature Tj 175 °C Ta = 25 °C 1
Storage Temperature Range Tstg -55 175 °C Ta = 25 °C 1

CAD (KiCad official)

  • Symbol: HZ5A1
  • 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 (4 pp, sha256 8ffbe650c32c30c5, retrieved 2026-10-22, tier: lcsc)
  • 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