component
MMBT5551Q-7
Public Made by Adomby adom
Diodes Incorporated 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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Contents
README
markdownMMBT5551Q-7
Diodes Incorporated · Bipolar (BJT) · SOT-23
MMBT5551Q-7 from Diodes Incorporated, 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 | B | input | Base; drives the NPN transistor, with VEBO limited to 6.0 V and BVEBO min 6.0 V at IE = 10 µA. |
| 2 | E | passive | Emitter; current return terminal of the NPN transistor, with VEBO limited to 6.0 V. |
| 3 | C | passive | Collector; VCEO is 160 V, VCBO is 180 V and continuous collector current IC is 600 mA. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Diodes Incorporated |
| 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 Voltage | VCBO | 180 | V | TA = +25°C | 2 | ||
| Collector-Emitter Voltage | VCEO | 160 | V | TA = +25°C | 2 | ||
| Emitter-Base Voltage | VEBO | 6 | V | TA = +25°C | 2 | ||
| Continuous Collector Current | IC | 600 | mA | TA = +25°C, Note 5 | 2 | ||
| Power Dissipation | PD | 300 | mW | TA = +25°C, Note 5 | 2 | ||
| Thermal Resistance, Junction to Ambient | RθJA | 417 | °C/W | Note 5 | 2 | ||
| Operating and Storage Temperature Range | TJ, TSTG | -55 | 150 | °C | 2 | ||
| ESD Human Body Model | ESD HBM | 4000 | V | JEDEC Class 3A | 2 | ||
| ESD Machine Model | ESD MM | 400 | V | JEDEC Class C | 2 | ||
| Collector-Base Breakdown Voltage | BVCBO | 180 | V | IC = 100µA, IE = 0 | 3 | ||
| Collector-Emitter Breakdown Voltage | BVCEO | 160 | V | IC = 1.0mA, IB = 0 | 3 | ||
| Emitter-Base Breakdown Voltage | BVEBO | 6 | V | IE = 10µA, IC = 0 | 3 | ||
| Collector Cutoff Current | ICBO | 50 | nA | VCB = 120V, IE = 0 | 3 | ||
| Emitter Cutoff Current | IEBO | 50 | nA | VEB = 4.0V, IC = 0 | 3 | ||
| DC Current Gain | hFE | 80 | IC = 1.0mA, VCE = 5.0V | 3 | |||
| DC Current Gain | hFE | 80 | 250 | IC = 10mA, VCE = 5.0V | 3 | ||
| DC Current Gain | hFE | 30 | IC = 50mA, VCE = 5.0V | 3 | |||
| Collector-Emitter Saturation Voltage | VCE(sat) | 0.15 | V | IC = 10mA, IB = 1.0mA | 3 | ||
| Collector-Emitter Saturation Voltage | VCE(sat) | 0.2 | V | IC = 50mA, IB = 5.0mA | 3 | ||
| Base-Emitter Saturation Voltage | VBE(sat) | 1 | V | IC = 10mA, IB = 1.0mA; IC = 50mA, IB = 5.0mA | 3 | ||
| Output Capacitance | Cobo | 6 | pF | VCB = 10V, f = 1.0MHz, IE = 0 | 3 | ||
| Small Signal Current Gain | hfe | 50 | 250 | VCE = 10V, IC = 1.0mA, f = 1.0kHz | 3 | ||
| Current Gain-Bandwidth Product | ft | 100 | 300 | MHz | VCE = 10V, IC = 10mA, f = 100MHz | 3 | |
| Noise Figure | nf | 8 | dB | VCE = 5.0V, IC = 200µA, RS = 1.0kΩ, f = 1.0kHz | 3 |
Materials and finish
As the datasheet states them (page.json metadata.appearance; the 3D model's colours follow it).
| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| contacts | tin | Terminals: Finish, Matte Tin Plated Leads Solderable per MIL-STD-202, Method 208 | 1 |
CAD (KiCad official)
- Symbol:
MMBT5551Q-7 - Footprint:
Package_TO_SOT_SMD:SOT-23 - 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files:
mmbt5551q-7-etched.step/mmbt5551q-7-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);mmbt5551q-7.step/mmbt5551q-7.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Diodes Incorporated datasheet (6 pp, sha256
d957b173522ef0f4, retrieved 2026-10-26, tier: manufacturer) - 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).