Manufacturer Part Number

MMBT3906T-7-F

Description

General-purpose PNP bipolar junction transistor for switching and amplification. Supports up to 40V collector-emitter voltage and 200mA of collector current. Packaged in tiny SOT-523 for high-density, space-limited applications. Suited for automotive-grade, harsh environment use. RoHS and REACH compliant.

Specifications

Transistor type: PNP

Collector-emitter breakdown voltage: 40V (max)

Collector current: 200mA (max)

Vce saturation: 400mV@5mA, 50mA

DC current gain (hFE): 100 (min) @ 10mA, 1V

Power dissipation: 150mW (max)

Transition frequency: 250MHz

Collector cutoff current: 50nA (max)

Operating temperature range: -55°C to 150°C

Package: SOT-523 (Surface Mount)

Moisture Sensitivity Level: 1 (unlimited)

Automotive grade, AEC-Q101 qualified

RoHS3 compliant, REACH unaffected

Device Structure

Single PNP transistor fabricated with planar process. Three terminals: emitter, base, collector arranged in SOT-523 miniature plastic package. Surface-mount design for automated PCB assembly.

Performance Characteristics

High switching frequency up to 250MHz enables use in RF and fast digital applications. Maintains low saturation voltage for efficient switching. Wide temperature range supports harsh environments. Good DC current gain for reliable signal amplification. Low collector leakage current enhances signal integrity.

Application Environments

Automotive electronics

Signal amplification in analog circuits

Switching circuits in digital logic

General-purpose small-signal applications

Portable and battery-operated devices

Consumer and industrial electronic assemblies

Selection Guidelines

Choose if you need a compact, surface-mount PNP BJT with up to 40V and 200mA ratings. Qualified for automotive use. Suitable for general amplification or switching—especially when PCB space is very limited. Make sure application does not exceed maximum stated voltage, current, and power ratings.

Usage Considerations

Correct polarity must be observed (emitter, base, collector connections). Ensure heat dissipation is adequate. Respect MSL 1: no need for controlled storage, but standard ESD practices recommended. Do not exceed absolute maximum ratings. Use in accordance with SOT-523 PCB footprints.

Potential Equivalent/Replacement Models

There are several widely used equivalent models:

MMBT3906LT1G (ON Semiconductor)

PMBT3906 (Nexperia)

BC857B (if pinout and ratings match, note differences)

BAV99W (for some switching logic, check configuration)

2N3906 (larger package, through-hole version)

If suitability is unclear or further cross-references are needed, please contact Ariat-Tech sales team for alternative options and detailed advice.

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