• FMMT458TA SOT-23-3
FMMT458TA SOT-23-3


Describing FMMT458TA

Quantity Unit Price(USD) Ext. Price
5 $0.111 $0.56
50 $0.086 $4.30
150 $0.074 $11.10
500 $0.064 $32.00
3000 $0.057 $171.00
6000 $0.053 $318.00


*The price is for reference only.
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Overview of FMMT458TA

The FMMT458TA is a PNP small signal surface mount transistor known for its high current gain and low saturation voltage. It is commonly used in various electronic circuits for amplification and switching applications.


(Note: The pin configuration below is a general representation. Refer to the specific datasheet for precise details.)

  • E: Emitter
  • B: Base
  • C: Collector

Key Features

  • High Current Gain: The FMMT458TA offers a high current gain, making it suitable for amplification purposes.
  • Low Saturation Voltage: With its low saturation voltage, this transistor is efficient for switching applications.
  • Surface Mount Package: Comes in a surface mount package for easy PCB mounting and space-saving design.
  • PNP Type: Being a PNP transistor, it complements NPN transistors in electronic circuit designs.

Note: For detailed technical specifications, please refer to the FMMT458TA datasheet.


  • Signal Amplification: Ideal for amplifying weak signals in audio and radio frequency circuits.
  • Switching Circuits: Suitable for driving loads or controlling electronic switches in various applications.
  • Voltage Regulation: Can be used in voltage regulator circuits for stable power supply output.


The FMMT458TA PNP transistor is designed to amplify or switch electronic signals with high efficiency and reliability. It plays a crucial role in signal processing and control applications.

Usage Guide

  • Emitter-Base Junction: Apply bias voltage between the Emitter (E) and Base (B) pins according to the circuit requirements.
  • Collector Connection: Connect the load or circuit to be controlled to the Collector (C) pin.
  • Biasing: Ensure proper biasing of the transistor for desired amplification or switching behavior.


For similar functionalities, consider these alternatives to the FMMT458TA:

  • MMBT3904: A general-purpose NPN transistor with similar characteristics for amplification and switching applications.
  • 2N3906: A PNP transistor commonly used for low-power amplification and switching circuits.



The followings are basic parameters of the part selected concerning the characteristics of the part and categories it belongs to.

Product Category Bipolar Transistors - BJT RoHS Details
Mounting Style SMD/SMT Package / Case SOT-23-3
Transistor Polarity NPN Configuration Single
Collector- Emitter Voltage VCEO Max 400 V Collector- Base Voltage VCBO 400 V
Emitter- Base Voltage VEBO 7 V Collector-Emitter Saturation Voltage 500 mV
Maximum DC Collector Current 225 mA Pd - Power Dissipation 500 mW
Gain Bandwidth Product fT 50 MHz Minimum Operating Temperature - 55 C
Maximum Operating Temperature + 150 C Series FMMT458
Brand Diodes Incorporated Continuous Collector Current 225 mA
Height 1.1 mm Length 3 mm
Product Type BJTs - Bipolar Transistors Factory Pack Quantity 3000
Subcategory Transistors Technology Si
Width 1.4 mm Unit Weight 0.000282 oz

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