component
MMBZ27VA
Public Made by Adomby adom
JSMSEMI TVS, SOT-23. 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
markdownMMBZ27VA
JSMSEMI · TVS · SOT-23
MMBZ27VA from JSMSEMI, in a SOT-23. 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 | K1 | passive | Cathode of the first unidirectional Zener TVS, used with pin 3 (VRWM 22 V, VBR 25.65-28.35 V at 1.0 mA, VC 40 V at 1.0 A for MMBZ27VA). |
| 2 | K2 | passive | Cathode of the second unidirectional Zener TVS, used with pin 3 (VRWM 22 V, VBR 25.65-28.35 V at 1.0 mA, VC 40 V at 1.0 A for MMBZ27VA). |
| 3 | A | passive | Common anode of both Zener TVS diodes; pins 1 and 2 are each tied against it for unidirectional use, or pins 1 and 2 form a single bidirectional device. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | JSMSEMI |
| Package | SOT-23 |
| Category | TVS/Fuse/Board Level Protection |
| Pins | 3 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Reverse leakage current | IR | 50 | nA | @ VRWM = 22 V | 2 | ||
| Breakdown voltage | VBR | 25.65 | 27 | 28.35 | V | @ IT = 1.0 mA | 2 |
| Forward voltage | VF | 0.9 | V | @ IF = 10 mA | 2 | ||
| Maximum temperature coefficient of VBR | VBR | 24.3 | mV/°C | 2 | |||
| Maximum reverse peak pulse current | IPP | 1 | A | 2 | |||
| Peak power dissipation | PPK | 40 | W | @ 1.0 ms, TA = 25 °C; MMBZ12VA thru MMBZ33VA (24 W for MMBZ5V6A thru MMBZ10VA) | 1 | ||
| Total power dissipation on FR-5 board | PD | 225 | mW | @ TA = 25 °C, FR-5 board | 1 | ||
| Total power dissipation on alumina substrate | PD | 300 | mW | @ TA = 25 °C, alumina substrate | 1 | ||
| Junction and storage temperature range | TJ, TSTG | -55 | 150 | °C | 1 | ||
| Lead solder temperature (maximum) | TL | 260 | °C | 10 second duration | 1 | ||
| Derate above 25 °C, FR-5 board | 1.8 | mW/°C | above TA = 25 °C, FR-5 board | 1 | |||
| Derate above 25 °C, alumina substrate | 2.4 | mW/°C | above TA = 25 °C, alumina substrate | 1 | |||
| Thermal resistance junction-to-ambient, FR-5 board | RθJA | 556 | °C/W | FR-5 board | 1 | ||
| Thermal resistance junction-to-ambient, alumina substrate | RθJA | 417 | °C/W | alumina substrate | 1 | ||
| Clamping voltage | VC | 40 | V | @ IPP (1.0 A, per IPP column of same row) | 2 | ||
| Working peak reverse voltage | VRWM | 22 | V | 2 |
CAD (KiCad official)
- Symbol:
MMBZ27VA - Footprint:
Package_TO_SOT_SMD:SOT-23 - 3D model: SOT-23 (KiCad packages3D, STEP)
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: JSMSEMI datasheet (5 pp, sha256
4c8a4fab17d6f64b, retrieved 2026-11-04, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(text+vision), consensusclaude-opus-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).