component
AD-FMMT591
Public Made by Adomby adom
Changjing Bipolar (BJT), 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
markdownAD-FMMT591
Changjing · Bipolar (BJT) · SOT-23
AD-FMMT591 from Changjing, 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 | BASE | input | Base of the PNP transistor; hFE is specified at VCE = -5V, and VEBO is limited to -5 V. |
| 2 | EMITTER | passive | Emitter of the PNP transistor; emitter-base voltage is limited to -5 V. |
| 3 | COLLECTOR | passive | Collector of the PNP transistor; VCEO -60 V, VCBO -80 V, continuous current -1 A (peak -2 A). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Changjing |
| Package | SOT-23 |
| 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 breakdown voltage | V(BR)CBO | -80 | V | IC = -100µA, IE = 0A | 2 | ||
| Collector-emitter breakdown voltage | V(BR)CEO | -60 | V | IC = -10mA, IB = 0A; pulsed, pulse width 300µs, duty cycle ≤2% | 2 | ||
| Emitter-base breakdown voltage | V(BR)EBO | -5 | V | IE = -100µA, IC = 0A | 2 | ||
| Collector cut-off current | ICBO | -0.1 | μA | VCB = -60V, IE = 0A | 2 | ||
| Emitter-base cut-off current | IEBO | -0.1 | μA | VEB = -4V, IC = 0A | 2 | ||
| DC current gain hFE(1) | hFE(1) | 100 | VCE = -5V, IC = -1mA; pulsed, pulse width 300µs, duty cycle ≤2% | 2 | |||
| DC current gain hFE(2) | hFE(2) | 100 | 300 | VCE = -5V, IC = -500mA; pulsed, pulse width 300µs, duty cycle ≤2% | 2 | ||
| DC current gain hFE(3) | hFE(3) | 80 | VCE = -5V, IC = -1A; pulsed, pulse width 300µs, duty cycle ≤2% | 2 | |||
| DC current gain hFE(4) | hFE(4) | 15 | VCE = -5V, IC = -2A; pulsed, pulse width 300µs, duty cycle ≤2% | 2 | |||
| Collector-emitter saturation voltage | VCE(sat)1 | -300 | mV | IC = -500mA, IB = -50mA; pulsed, pulse width 300µs, duty cycle ≤2% | 2 | ||
| Collector-emitter saturation voltage | VCE(sat)2 | -600 | mV | IC = -1A, IB = -100mA; pulsed, pulse width 300µs, duty cycle ≤2% | 2 | ||
| Base-emitter saturation voltage | VBE(sat) | -1.2 | V | IC = -1A, IB = -100mA; pulsed, pulse width 300µs, duty cycle ≤2% | 2 | ||
| Base-emitter voltage | VBE(on) | -1 | V | VCE = -5V, IC = -1A; pulsed, pulse width 300µs, duty cycle ≤2% | 2 | ||
| Transition frequency | fT | 150 | MHz | VCE = -10V, IC = -50mA, f = 100MHz | 2 | ||
| Collector output capacitance | Cob | 10 | pF | VCB = -10V, f = 1MHz | 2 | ||
| Collector-base voltage | VCBO | -80 | V | 2 | |||
| Collector-emitter voltage | VCEO | -60 | V | 2 | |||
| Emitter-base voltage | VEBO | -5 | V | 2 | |||
| Collector continuous current | IC | -1 | A | 2 | |||
| Peak pulse current | ICM | -2 | A | 2 | |||
| Collector power dissipation | PC | 250 | mW | 2 | |||
| Operating junction and storage temperature range | Tj, Tstg | -55 | 150 | °C | 2 | ||
| Thermal resistance from junction to ambient | RθJA | 500 | °C/W | 2 |
CAD (KiCad official)
- Symbol:
AD-FMMT591 - Footprint:
Package_TO_SOT_SMD:SOT-23 - 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files:
ad-fmmt591-etched.step/ad-fmmt591-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);ad-fmmt591.step/ad-fmmt591.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Changjing datasheet (6 pp, sha256
2e9256477dc94dc7, retrieved 2026-10-17, 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).