• packageimg


A transistor with NPN polarity, SOT23 package, capable of handling voltages up to 150V and currents up to 1A, with a power dissipation of 625mW


  • 90-day after-sales guarantee
  • 365 Days Quality Guarantee
  • Genuine Product Guarantee
  • 7*24 hours service quarantee

Rapid Quote

Submit your quote request for FMMT625TA using this form.You can also reach us via email at Email: [email protected], and we will respond within 12 hours.

Overview of FMMT625TA

The FMMT625TA is a high-performance NPN bipolar transistor designed for general electronic applications.This transistor offers low saturation voltage and high current gain,making it suitable for amplification and switching tasks in various circuits.


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

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

Circuit Diagram

Include a circuit diagram to visually represent the connections and operation of the FMMT625TA transistor.

Key Features

  • High Current Gain:The FMMT625TA offers a high current gain,ensuring efficient amplification in electronic circuits.
  • Low Saturation Voltage:With its low saturation voltage,this transistor minimizes power loss during operation.
  • Fast Switching Speed:The FMMT625TA provides fast switching speeds,making it suitable for applications requiring rapid switching.
  • Low Noise:The transistor exhibits low noise characteristics,ideal for noise-sensitive electronic designs.
  • Wide Operating Temperature Range:It can operate over a wide temperature range,making it versatile for different environmental conditions.

Note:For detailed technical specifications,please refer to the FMMT625TA datasheet.


  • Signal Amplification:Suitable for signal amplification in audio amplifiers,RF circuits,and sensor interfaces.
  • Switching Applications:Used for switching tasks in digital logic circuits, motor control circuits,and power supplies.
  • Oscillator Circuits:Can be employed in oscillator circuits for generating clock signals and frequency modulation.


The FMMT625TA is a versatile NPN bipolar transistor that excels in amplification and switching applications.It provides reliable performance and high efficiency in various electronic circuits.

Usage Guide

  • Biasing:The base should be biased correctly using appropriate resistors to ensure proper operation.
  • Amplification:Connect the signal source to the base terminal and the load to the collector for amplification purposes.
  • Switching:Utilize the transistor in saturation and cutoff regions for switching between on and off states.

Frequently Asked Questions

Q:Does the FMMT625TA require a heat sink for operation?
A:Depending on the operating conditions and power dissipation,a heat sink may be recommended to ensure the transistor operates within safe temperature limits.


For similar functionalities,consider these alternatives to the FMMT625TA:

  • 2N3904:A commonly used NPN transistor with comparable characteristics to the FMMT625TA.
  • BC548:Another NPN transistor suitable for general electronic applications,offering similar performance to the FMMT625TA.
  • MMBT3904:SMD version of the 2N3904 transistor with similar specifications and usage.


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 150 V Collector- Base Voltage VCBO 150 V
Emitter- Base Voltage VEBO 5 V Collector-Emitter Saturation Voltage 180 mV
Maximum DC Collector Current 1 A Pd - Power Dissipation 625 mW
Gain Bandwidth Product fT 135 MHz Minimum Operating Temperature - 55 C
Maximum Operating Temperature + 150 C Series FMMT62
Brand Diodes Incorporated Continuous Collector Current 1 A
DC Collector/Base Gain hfe Min 200 at 10 mA, 10 V, 300 at 200 mA, 10 V, 30 at 1 A, 10 V DC Current Gain hFE Max 200 at 10 mA, 10 V
Height 1 mm Length 2.9 mm
Product Type BJTs - Bipolar Transistors Factory Pack Quantity 3000
Subcategory Transistors Technology Si
Width 1.3 mm Unit Weight 0.000282 oz

Warranty & Returns

Warranty, Returns, and Additional Information

  • QA & Return Policy

    Parts Quality Guarantee: 365 days

    Returns for refund: within 90 days

    Returns for Exchange: within 90 days

  • Shipping and Package

    Shipping:For example, FedEx, JP, UPS, DHL,SAGAWA, or YTC.

    Parts Packaging Guarantee: Featuring 100% ESD anti-static protection, our packaging incorporates high toughness and superior buffering capabilities.

  • Payment

    For example, channels like VISA,MasterCard,Western Union,PayPal,MoneyGram,Rakuten Pay and more.

    If you have specific payment channel preferences or requirements, please get in touch with our sales team for assistance.