component
1SMB5374B
Public Made by Adomby adom
YFW Zener Diodes, SMB. 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
markdown1SMB5374B
YFW · Zener Diodes · SMB
1SMB5374B from YFW, in a SMB. 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 | Cathode | passive | Cathode of the zener diode; the 1SMB5374B (75 V nominal Vz at 20 mA, ±5%) is reverse-biased here in regulation, with 5 W maximum power dissipation. |
| 2 | Anode | passive | Anode of the zener diode; maximum forward voltage is 1.2 V at IF = 1.0 A. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | YFW |
| Package | SMB |
| 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 tolerance (suffix B) | VZ | -5 | 5 | % | Suffix B | 2 | |
| Nominal Zener voltage | VZ | 75 | V | @ IZT | 2 | ||
| Test current | IZT | 20 | mA | 2 | |||
| Maximum zener impedance | ZZT | 45 | Ω | @ IZT | 2 | ||
| Maximum zener impedance (knee) | ZZK | 620 | Ω | @ IZK = 1.0 mA | 2 | ||
| Maximum reverse leakage current | IR | 0.5 | µA | @ VR = 56.0 V | 2 | ||
| Maximum zener current | IZM | 63 | mA | 2 | |||
| Maximum surge current | IZSM | 1.9 | A | Non-recurrent half-sine wave, 8.3 ms | 2 | ||
| Maximum regulator voltage | ΔVZ | 1.6 | V | 2 | |||
| Maximum forward voltage | VF | 1.2 | V | IF = 1.0 A | 1 | ||
| Power dissipation | PD | 5 | W | TL = 25 °C | 1 | ||
| Operating and storage temperature range | TJ, TSTG | -65 | 150 | °C | 1 | ||
| Thermal resistance, junction to ambient | RӨJA | 90 | °C/W | Mounted on FR4 PC board (1 oz Cu) with recommended footprint | 1 | ||
| Thermal resistance, junction to lead | RӨJL | 25 | °C/W | Mounted on FR4 PC board (1 oz Cu) with recommended footprint | 1 |
CAD (KiCad official)
- Symbol:
1SMB5374B - Footprint:
Diode_SMD:D_SMB - 3D model: SMB (KiCad packages3D, STEP)
- 3D model files:
1smb5374b-etched.step/1smb5374b-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);1smb5374b.step/1smb5374b.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: YFW datasheet (3 pp, sha256
24001c3c727b3300, retrieved 2026-10-27, tier: lcsc) - 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).