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BZX79-C56

Public Made by Adom

by adom

Nexperia Zener Diodes, DO-204AH(DO-35). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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BZX79-C56

Nexperia · Zener Diodes · DO-204AH(DO-35)

BZX79-C56 from Nexperia, in a DO-204AH(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, indicated by the marking band on the package, which the datasheet states marks the cathode.
2 A passive Anode of the voltage regulator diode; the datasheet gives no separate anode rating, and the series limits apply, including continuous forward current of 250 mA max and total power dissipation of 500 mW max at Tamb = 50 °C with note 2 conditions.

Key specifications

Parameter Value
Manufacturer Nexperia
Package DO-204AH(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
Continuous forward current IF 250 mA 3
Total power dissipation Ptot 400 mW Tamb = 50 °C; note 1 3
Total power dissipation Ptot 500 mW Tamb = 50 °C; note 2 3
Non-repetitive peak reverse power dissipation PZSM 40 W tp = 100 μs; square wave; Tj = 25 °C prior to surge; see Fig.3 3
Storage temperature Tstg -65 200 °C 3
Junction temperature Tj -65 200 °C 3
Forward voltage VF 0.9 V IF = 10 mA; see Fig.4 3
Reverse current IR 50 nA BZX79-B/C15 to BZX79-B/C75; VR = 0.7VZnom 4
Working voltage (Tol. approx. ±5%, C) VZ 52 60 V IZtest = 2 mA; Tol. approx. ±5% (C) 6
Differential resistance rdif 100 425 Ω IZtest = 0.5 mA 6
Differential resistance rdif 70 200 Ω IZtest = 2 mA 6
Temperature coefficient SZ 42.2 52 63.8 mV/K IZtest = 2 mA 6
Diode capacitance Cd 40 pF f = 1 MHz; VR = 0 V 6
Non-repetitive peak reverse current IZSM 0.3 A tp = 100 μs; Tamb = 25 °C 6
Thermal resistance junction to tie-point Rth j-tp 300 K/W lead length 8 mm. 7
Thermal resistance junction to ambient Rth j-a 380 K/W lead length max.; see Fig.2 and note 1 7

CAD (KiCad official)

  • Symbol: BZX79-C56
  • Footprint: Diode_THT:D_DO-35_SOD27_P7.62mm_Horizontal
  • 3D model: DO-204AH(DO-35) (KiCad packages3D, STEP)

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: Nexperia datasheet (11 pp, sha256 5d6ced72e738abc2, retrieved 2026-10-21, tier: manufacturer)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-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