# ZUMT591TA

**Diodes Incorporated** · Bipolar (BJT) · SOT-323

ZUMT591TA from Diodes Incorporated, in a SOT-323. 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 | B | input | Base of the PNP transistor; absolute maximum base current is -200 mA and emitter-base voltage is -5 V. |
| 2 | E | passive | Emitter of the PNP transistor; emitter-base breakdown voltage V(BR)EBO is -5 V minimum. |
| 3 | C | passive | Collector of the PNP transistor; VCEO is -60 V, VCBO is -80 V, continuous current IC is -1 A and peak pulse current ICM is -2 A. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Diodes Incorporated |
| Package | SOT-323 |
| Category | Transistors/Thyristors |
| 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 |
|---|---|---|---|---|---|---|---|
| Collector-Base Voltage | VCBO | -80 |  |  | V |  | 1 |
| Collector-Emitter Voltage | VCEO | -60 |  |  | V |  | 1 |
| Emitter-Base Voltage | VEBO | -5 |  |  | V |  | 1 |
| Peak Pulse Current | ICM | -2 |  |  | A |  | 1 |
| Continuous Collector Current | IC | -1 |  |  | A |  | 1 |
| Base Current | IB | -200 |  |  | mA |  | 1 |
| Power Dissipation | Ptot |  |  | 500 | mW | Tamb=25°C | 1 |
| Operating and Storage Temperature Range | Tj:Tstg | -55 |  | 150 | °C |  | 1 |
| Collector-Base Breakdown Voltage | V(BR)CBO | -80 |  |  | V | IC=-100µA, IE=-0 | 1 |
| Collector-Emitter Breakdown Voltage | VCEO(sus) | -60 |  |  | V | IC=-10mA*, IB=-0 | 1 |
| Emitter-Base Breakdown Voltage | V(BR)EBO | -5 |  |  | V | IE=-100µA, IC=-0 | 1 |
| Collector Cut-Off Current | ICBO |  |  | -100 | nA | VCB=-60V | 1 |
| Emitter Cut-Off Current | IEBO |  |  | -100 | nA | VEB=-4V, IC=-0 | 1 |
| Collector-Emitter Saturation Voltage | VCE(sat) |  |  | -0.3 | V | IC=-500mA, IB=-50mA* | 1 |
| Collector-Emitter Saturation Voltage | VCE(sat) |  |  | -0.6 | V | IC=-1A, IB=-100mA* | 1 |
| Base-Emitter Saturation Voltage | VBE(sat) |  |  | -1.2 | V | IC=-1A, IB=-100mA* | 1 |
| Base-Emitter Turn On Voltage | VBE(on) |  |  | -1 | V | IC=-1A, VCE=-5V* | 1 |
| Static Forward Current Transfer Ratio | hFE | 100 |  |  |  | IC=-1mA, VCE=-5V* | 2 |
| Static Forward Current Transfer Ratio | hFE | 80 |  |  |  | IC=-1A, VCE=-5V* | 2 |
| Static Forward Current Transfer Ratio | hFE | 15 |  |  |  | IC=-2A, VCE=-5V* | 2 |

## CAD (KiCad official)

- Symbol: `ZUMT591TA`
- Footprint: `Package_TO_SOT_SMD:SOT-323_SC-70`
- 3D model: SOT-323 (KiCad packages3D, STEP)
- 3D model files: `zumt591ta-etched.step` / `zumt591ta-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `zumt591ta.step` / `zumt591ta.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Diodes Incorporated datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8600609169414373376) (2 pp, sha256 `756e5285ecbc2be1`, retrieved 2026-10-18, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text+vision), consensus `claude-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).

[Datasheet PDF](docs/zumt591ta-datasheet.pdf)