MMBT3906 PNP Transistor: CAD Models, Features and Package

MMBT3906 Introduction

The MMBT3906 is a PNP bipolar junction transistor (BJT) commonly used in low-power. The transistor is characterized by its maximum current rating of 200 mA and a maximum voltage rating of 40 V.

In a PNP transistor, when a small current flows from the emitter to the base (with the base being at a lower voltage than the emitter), it allows a larger current to flow from the emitter to the collector. This current amplification property is utilized in switching and amplification circuits. When the base of the MMBT3906 is pulled low relative to the emitter, it allows current to flow from the emitter to the collector, effectively turning the transistor "on." Conversely, when the base is at a higher voltage relative to the emitter, the transistor is "off," preventing current flow from the emitter to the collector.

             MMBT3906 Pinout

                           MMBT3906 CAD Models    Symbol

                                                                                                                                                                    Footprint

          3D Model

MMBT3906 Specifications

Parameter	Value
Transistor Type	PNP
Package Type	SOT-23
Maximum Collector-Emitter Voltage	40 V
Maximum Collector-Base Voltage	40 V
Maximum Emitter-Base Voltage	5 V
Maximum Collector Current	200 mA
Maximum Power Dissipation	300 mW
DC Current Gain	100 to 300
Transition Frequency	250 MHz
Collector-Emitter Saturation Voltage	0.2 V (max) at Ic = 10 mA, Ib = 1 mA
Operating Temperature Range	-55°C - 150°C

MMBT3906 Features

Epitaxial Planar Die Construction

Applied to Medium Power Amplification and Switching

Complementary NPN Type: MMBT3904

Totally Lead-Free & Fully RoHS Compliant

Halogen and Antimony Free. "Green" Device

Qualified to AEC-Q101 Standards for High Reliability

PPAP Capable

MMBT3906 Applications

Switching Circuits

Amplifiers

Digital Circuits

Sensor Interfaces

LED Drivers

Pulse Width Modulation (PWM) Circuits

Oscillators and Timers

General-Purpose Amplification

 MMBT3906 Marketing Information

MMBT3906 Package

The MMBT3906 is housed in a SOT-23 package, which is a small-outline transistor package designed for surface-mount technology (SMT). This package features three leads and a compact size, with dimensions approximately 2.9 mm in length, 1.3 mm in width, and 1.1 mm in height. The pin configuration includes the emitter, base, and collector, arranged in a manner conducive to efficient PCB layout. 

How to Use MMBT3906?

The MMBT3906 transistor has three pins: the emitter (E), base (B), and collector (C). For switching applications, connect the emitter to the negative supply voltage and the collector to the load. The base is then connected to the control signal through a current-limiting resistor to ensure the base current does not exceed the transistor's maximum rating.

When using the MMBT3906 for amplification, it is typically configured in a common-emitter setup. The input signal is applied to the base through a coupling capacitor, and the output is taken from the collector. A biasing network of resistors is used to set the operating point of the transistor, enabling it operates in the desired region of its characteristic curves. 

MMBT3906 Equivalents

Equivalent Transistor	Type	Vce (max)	Ic (max)	hFE (min)	Package
SMBT3906S	PNP	40V	200mA	100	SOT-23
MMBT3906VL	PNP	40V	200mA	100	SOT-23
PMBT3906	PNP	40V	200mA	100	SOT-23
2SA1366	PNP	50V	1A	200	TO-92
2SA1518	PNP	50V	150mA	200	TO-92
2SA1519	PNP	50V	150mA	200	TO-92
2SA1520	PNP	50V	150mA	200	TO-92

FAQs

Can the MMBT3906 be used in place of other PNP transistors?

Yes, the MMBT3906 can replace other PNP transistors with similar specifications, such as the SMBT3906S, PMBT3906, and 2SA1366, among others.

How do I use the MMBT3906 in a switching application?

In switching applications, the MMBT3906 can be used as an electronic switch. When a small current is applied to the base, it allows a larger current to flow from the emitter to the collector.

What precautions should I take when using the MMBT3906?

The maximum ratings for voltage, current, and power dissipation are not exceeded. Use proper heat sinking if necessary and avoid static discharge damage by handling the device with care.