# MMBZ27VAL

**Nexperia** · ESD And Surge Protection (TVS/ESD) · SOT-23

MMBZ27VAL from Nexperia, 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 diode 1; the ESD and transient ratings are measured from pin 1 or 2 to pin 3. |
| 2 | K2 | passive | Cathode of diode 2; the ESD and transient ratings are measured from pin 1 or 2 to pin 3. |
| 3 | A | passive | Common anode shared by both unidirectional diodes; it is the reference terminal for the rated peak pulse power, clamping voltage and ESD ratings. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Nexperia |
| Package | SOT-23 |
| Category | Circuit 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 |
|---|---|---|---|---|---|---|---|
| rated peak pulse power | PPPM |  |  | 40 | W |  | 3 |
| rated peak pulse current | IPPM |  |  | 1 | A | tp = 10/1000 µs | 3 |
| total power dissipation | Ptot |  |  | 265 | mW | Tamb ≤ 25 °C | 3 |
| total power dissipation | Ptot |  |  | 360 | mW |  | 3 |
| junction temperature | Tj |  |  | 150 | °C |  | 3 |
| ambient temperature | Tamb | -55 |  | 150 | °C |  | 3 |
| storage temperature | Tstg | -65 |  | 150 | °C |  | 3 |
| electrostatic discharge voltage, IEC 61000-4-2 contact discharge | VESD |  |  | 30 | kV | IEC 61000-4-2 (contact discharge); Tamb = 25 °C | 3 |
| electrostatic discharge voltage, IEC 61000-4-2 air discharge | VESD |  |  | 15 | kV | IEC 61000-4-2 (air discharge); Tamb = 25 °C | 3 |
| electrostatic discharge voltage, human body model | VESD |  |  | 8 | kV | MIL-STD-883; human body model (HBM); Tamb = 25 °C | 3 |
| electrostatic discharge voltage, machine model | VESD |  |  | 2 | kV | machine model; Tamb = 25 °C | 3 |
| thermal resistance from junction to ambient | Rth(j-a) |  |  | 460 | K/W | in free air | 4 |
| thermal resistance from junction to ambient (mounting pad for cathode 1 cm²) | Rth(j-a) |  |  | 340 | K/W |  | 4 |
| thermal resistance from junction to solder point | Rth(j-sp) |  |  | 50 | K/W |  | 4 |
| forward voltage | VF |  |  | 0.9 | V | IF = 10 mA; Tamb = 25 °C | 4 |
| reverse standoff voltage | VRWM |  |  | 22 | V | Tamb = 25 °C | 4 |
| breakdown voltage | VBR | 25.65 | 27 | 28.35 | V | IR = 1 mA; Tamb = 25 °C | 4 |
| reverse leakage current | IRM |  | 0.1 | 5 | nA | VRWM = 22 V; Tamb = 25 °C | 4 |
| diode capacitance | Cd |  | 48 | 60 | pF | f = 1 MHz; VR = 0 V; Tamb = 25 °C | 4 |
| clamping voltage | VCL |  |  | 40 | V | IPPM = 1 A; Tamb = 25 °C | 4 |

## CAD (KiCad official)

- Symbol: `MMBZ27VAL`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `mmbz27val-etched.step` / `mmbz27val-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `mmbz27val.step` / `mmbz27val.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Nexperia datasheet](https://assets.nexperia.com/documents/data-sheet/MMBZ27VAL.pdf) (11 pp, sha256 `0dd9f8d810510349`, retrieved 2026-10-17, 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](docs/mmbz27val-datasheet.pdf)