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1SMB5952B

Public Made by Adom

by adom

EIC Semicon Zener Diodes, SMB(DO-214AA). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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Made with KiCad 10.0 · needs KiCad 10.0 or later to open · KiCad file format 20260206
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1SMB5952B

EIC Semicon · Zener Diodes · SMB(DO-214AA)

1SMB5952B from EIC Semicon, in a SMB(DO-214AA). 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, the end marked with the color band; the 130 V (nominal VZ at 2.9 mA IZT) zener is reverse biased with this pin positive, with maximum steady-state dissipation of 3.0 W at TL = 75°C.
2 A passive Anode, the end opposite the color band; forward voltage is at most 1.5 V at IF = 200 mA.

Key specifications

Parameter Value
Manufacturer EIC Semicon
Package SMB(DO-214AA)
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
Nominal Zener Voltage tolerance VZ -5 5 % Suffix B indicates ±5% tolerance 2
Maximum Zener Impedance ZZT 450 Ω @ IZT = 2.9 mA 2
Maximum Zener Knee Impedance ZZK 5000 Ω @ IZK = 0.25 mA 2
Maximum Reverse Leakage Current IR 1 μA @ VR = 98.8 V 2
Maximum DC Zener Current IZM 11 mA 2
Maximum Forward Voltage VF 1.5 Volts IF = 200 mA 1
Maximum Steady State Power Dissipation PD 3 W TL = 75°C, measured at zero lead length 1
Derating above 75 °C 40 mW/°C Derate above 75 °C 1
Maximum Steady State Power Dissipation PD 550 mW Ta = 25 °C, measured at zero lead length 1
Derating above 25 °C 4.4 mW/°C Derate above 25 °C 1
Junction Temperature Range TJ -65 150 °C 1
Storage Temperature Range Tstg -65 150 °C 1
Thermal Resistance Junction to Lead RθJL 25 °C/W 1
Thermal Resistance Junction to Ambient RθJA 226 °C/W 1
Nominal Zener Voltage VZ 130 V @ IZT = 2.9 mA 2
Zener Test Current IZT 2.9 mA 2

CAD (KiCad official)

  • Symbol: 1SMB5952B
  • Footprint: Diode_SMD:D_SMB
  • 3D model: SMB(DO-214AA) (KiCad packages3D, STEP)
  • 3D model files: 1smb5952b-etched.step / 1smb5952b-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); 1smb5952b.step / 1smb5952b.glb are the bare package body.

Provenance

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

  • Datasheet: EIC Semicon datasheet (3 pp, sha256 a92bcce9354ab090, 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