MMBTA55LT1G: A High-Performance PNP Transistor by onsemi Features, Specs & Applications

The MMBTA55LT1G from onsemi is a premium PNP bipolar junction transistor (BJT) designed for precision signal switching, amplification, and general-purpose electronic circuits. This transistor combines high efficiency, compact packaging, and robust performance, making it a top choice for engineers and designers. Below, we explore its key features, technical specifications, package details, and applications to help you understand why the MMBTA55LT1G stands out in the semiconductor market.

Product Overview

Manufacturer & Category

• Manufacturer: onsemi (a global leader in semiconductor solutions)
• Category: Discrete Semiconductor Products Transistors (BJT) Single PNP

Key Features & Specifications

1. Transistor Type & Structure

• Type: PNP (Positive-Negative-Positive)
• Structure: Bipolar Junction Transistor (BJT)
• PNP transistors are ideal for applications requiring current flow from emitter to collector, such as low-power switching and amplification.

2. Current & Voltage Ratings

• Collector Current (Ic): 500 mA (Max) Suitable for driving LEDs, relays, or small motors.
• Collector-Emitter Voltage (Vceo): 60 V (Max) Robust enough for higher-voltage circuits.
• Collector-Base Voltage (Vcbo): 60 V (Max)
• Emitter-Base Voltage (Vebo): 5 V (Max)

3. Efficiency & Performance

• Vce Saturation: 250 mV @ 10 mA, 100 mA Ensures minimal power loss.
• DC Current Gain (hFE): 100 (Min) @ 100 mA, 1 V Excellent signal amplification.
• Transition Frequency (ft): 50 MHz Supports high-speed switching.

4. Power & Thermal Ratings

• Power Dissipation (Pd): 225 mW Ensures reliable operation.
• Operating Temperature: -55 C to +150 C (TJ) Suitable for extreme environments.

5. Leakage & Noise Performance

• Collector Cutoff Current (Iceo): 100 nA (Max) Minimizes power waste.
• Low noise figure Ideal for audio and RF applications.

Package & Mounting

• Package Type: SOT-23-3 (TO-236) Compact and space-saving.
• Mounting: Surface Mount (SMT) Enables automated PCB assembly.
• Pin Configuration: Emitter (1), Base (2), Collector (3).

Applications of MMBTA55LT1G

This transistor is widely used in:

• Signal Amplification: Audio preamps, RF stages.
• Switching Circuits: LED drivers, relay controllers.
• General Electronics: Consumer devices, automotive systems.
• Industrial Controls: Sensor interfaces, power management.

Why Choose MMBTA55LT1G?

1. High Reliability: Manufactured by onsemi with strict quality control.
2. Compact & Efficient: SOT-23-3 package saves PCB space.
3. Wide Temperature Range: Operates in extreme conditions.
4. Cost-Effective: High performance at a competitive price.

Conclusion

The MMBTA55LT1G is a versatile, high-performance PNP transistor perfect for modern electronics. Its 500mA current, 60V voltage rating, and 50MHz switching speed make it ideal for amplification, switching, and control applications. Whether you're designing consumer electronics or industrial systems, the MMBTA55LT1G delivers reliability and efficiency. Purchase now and enhance your circuit designs with onsemi s trusted technology!