component
1SMB5919BT3G-MS
Public Made by Adomby adom
MSKSEMI Zener Diodes, SMB. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
Made with KiCad 10.0 · needs KiCad 10.0 or later to open · KiCad file format 20260206
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1SMB5919BT3G-MS
MSKSEMI · Zener Diodes · SMB
1SMB5919BT3G-MS from MSKSEMI, 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 | K | passive | Cathode, the terminal marked by the polarity band; for 1SMB5919B (5.6 V nominal Zener, 3.0 W at TL = 75°C) it goes positive relative to the anode in Zener regulation. |
| 2 | A | passive | Anode terminal, opposite the polarity band; forward voltage is 1.5 V max at IF = 200 mA. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | MSKSEMI |
| 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 | VZ | 5.32 | 5.6 | 5.88 | V | @ IZT = 66.9 mA, TL = 30°C | 4 |
| Zener Test Current | IZT | 66.9 | mA | 4 | |||
| Maximum Zener Impedance | ZZT | 2 | Ω | @ IZT | 4 | ||
| Maximum Zener Impedance at knee | ZZK | 250 | Ω | @ IZK = 1 mA | 4 | ||
| Reverse Leakage Current | IR | 5 | μA | @ VR = 3 V | 4 | ||
| Maximum DC Zener Current | IZM | 267 | mA | 4 | |||
| Forward Voltage | VF | 1.5 | V | IF = 200 mA(dc) | 3 | ||
| Steady State Power Dissipation | PD | 3 | W | TL = 75°C, zero lead length | 2 | ||
| Derating above 75°C | 40 | mW/°C | Above 75°C | 2 | |||
| Steady State Power Dissipation | PD | 550 | mW | TA = 25°C, FR-4 board, recommended footprint | 2 | ||
| Derating above 25°C | 4.4 | mW/°C | Above 25°C | 2 | |||
| Operating and Storage Temperature Range | TJ, Tstg | -65 | 150 | °C | 2 | ||
| Thermal Resistance Junction-to-Lead | RθJL | 25 | °C/W | 2 | |||
| Thermal Resistance Junction-to-Ambient | RθJA | 226 | °C/W | FR-4 board, recommended footprint | 2 | ||
| Zener Voltage Tolerance | -5 | 5 | % | Type numbers indicate ±5% | 4 |
CAD (KiCad official)
- Symbol:
1SMB5919BT3G-MS - Footprint:
Diode_SMD:D_SMB - 3D model: SMB (KiCad packages3D, STEP)
- 3D model files:
1smb5919bt3g-ms-etched.step/1smb5919bt3g-ms-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);1smb5919bt3g-ms.step/1smb5919bt3g-ms.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: MSKSEMI datasheet (8 pp, sha256
d1db003dcf102a3c, retrieved 2026-10-22, 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).