# FMMT591-TP

**MCC Micro Commercial Components** · Bipolar Transistors - BJT · SOT-23

FMMT591-TP from MCC Micro Commercial Components, in a SOT-23. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | B | input | Base of the PNP transistor. Controls collector current; VBE(sat) = -1.2V at IC = -1A, IB = -100mA. VEBO absolute max -5V. |
| 2 | E | passive | Emitter of the PNP transistor. Typically the highest-potential terminal in a PNP configuration; VEBO absolute max -5V. |
| 3 | C | passive | Collector of the PNP transistor. VCEO absolute max -60V, VCBO absolute max -80V, IC continuous rating -1A. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | MCC Micro Commercial Components |
| Package | SOT-23 |
| Category | Triode/MOS Tube/Transistor |
| Pins | 3 |

## Ordering variants

Same part, different packaging or reel option.

- `FMMT591-TP`

## 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-Emitter Voltage | VCEO |  |  | -60 | V |  | 1 |
| Collector-Base Voltage | VCBO |  |  | -80 | V |  | 1 |
| Emitter-Base Voltage | VEBO |  |  | -5 | V |  | 1 |
| Continuous Collector Current | IC |  |  | -1 | A |  | 1 |
| Power Dissipation | PD |  |  | 500 | mW |  | 1 |
| Operating Junction Temperature Range | TJ | -55 |  | 150 | °C |  | 1 |
| Storage Temperature Range | TSTG | -55 |  | 150 | °C |  | 1 |
| Thermal Resistance Junction to Ambient | RθJA |  | 250 |  | °C/W | Junction to ambient | 1 |
| Collector-Base Breakdown Voltage | V(BR)CBO | -80 |  |  | V | IC=-100µA, IE=0 | 2 |
| Collector-Emitter Breakdown Voltage | V(BR)CEO | -60 |  |  | V | IC=-10mA, IB=0 | 2 |
| Emitter-Base Breakdown Voltage | V(BR)EBO | -5 |  |  | V | IE=-100µA, IC=0 | 2 |
| Collector-Base Cutoff Current | ICBO |  |  | -0.1 | µA | VCB=-60V, IE=0 | 2 |
| Emitter-Base Cutoff Current | IEBO |  |  | -0.1 | µA | VEB=-4V, IC=0 | 2 |
| Collector-Emitter Saturation Voltage | VCE(sat) |  |  | -0.3 | V | IC=-500mA, IB=-50mA | 2 |
| Collector-Emitter Saturation Voltage | VCE(sat) |  |  | -0.6 | V | IC=-1A, IB=-100mA | 2 |
| Base-Emitter Saturation Voltage | VBE(sat) |  |  | -1.2 | V | IC=-1A, IB=-100mA | 2 |
| Base-Emitter Voltage | VBE |  |  | -1 | V | VCE=-5V, IC=-1A | 2 |
| DC Current Gain hFE(1) | hFE(1) | 100 |  |  |  | VCE=-5V, IC=-1mA | 2 |
| DC Current Gain hFE(2) | hFE(2) | 100 |  | 300 |  | VCE=-5V, IC=-500mA | 2 |
| DC Current Gain hFE(3) | hFE(3) | 80 |  |  |  | VCE=-5V, IC=-1A | 2 |
| DC Current Gain hFE(4) | hFE(4) | 15 |  |  |  | VCE=-5V, IC=-2A | 2 |
| Transition Frequency | fT | 150 |  |  | MHz | VCE=-10V, IC=-50mA, f=100MHz | 2 |
| Output Capacitance | Cob |  |  | 10 | pF | VCB=-10V, IE=0, f=1MHz | 2 |

## CAD (KiCad official)

- Symbol: `FMMT591-TP`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `fmmt591-tp-etched.step` / `fmmt591-tp-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `fmmt591-tp.step` / `fmmt591-tp.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [MCC Micro Commercial Components datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588916063321411584) (4 pp, sha256 `119caa4c5cf592f2`, retrieved 2026-08-17, tier: lcsc)
- **Extractor:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/fmmt591-tp-datasheet.pdf)