Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

Home > Products > Discrete Semiconductor Products > Transistors > Bipolar (BJT) > Single Bipolar Transistors

Diodes Incorporated FMMT411FDBW-7

Name: FMMT411FDBW-7
Brand: Diodes Incorporated
SKU: FMMT411FDBW-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: FMMT411FDBW-7

Manufacturer:: Diodes Incorporated

Category:: Single Bipolar Transistors

Package:: 3-UDFN Exposed Pad

Datasheet:: FMMT411FDBW-7.pdf

Description:: TRANS NPN 15V 5A W-DFN2020-3

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:2,241

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

FMMT411FDBW-7 from Diodes Incorporated is an NPN low-voltage avalanche transistor in W-DFN2020-3 package, designed for controlled avalanche-mode operation with 35A typical pulsed current (I_USB), BVCBO > 80V, BVCEO > 15V, and fast switching (t_r = 37ns). It serves as a high-current pulse switch in LIDAR laser diode drivers and radar transmitters.

For engineers reviewing the FMMT411FDBW-7 datasheet, FMMT411FDBW-7 pinout, FMMT411FDBW-7 application, or FMMT411FDBW-7 equivalent, key selection criteria include avalanche energy handling, low-inductance DFN packaging, thermal resistance (R_θJC = 12°C/W under optimized layout), and wettable flank plating for AOI inspection.

Technical Context

This transistor operates in controlled avalanche breakdown-triggered by base overdrive-to generate high-current, fast-edge pulses without external snubbers. Its design emphasizes minimal parasitic inductance via symmetric leadframe geometry and ultra-low-profile (0.62mm) DFN packaging.

It requires precise energy limiting per pulse to avoid lattice damage, with safe operation defined by V_CE = 70V, C_CE = 470pF test conditions and strict PCB thermal management (R_θJA = 67°C/W on 25mm × 25mm 2oz copper).

Key Specifications

Parameter	Value and Actual Design Meaning
I_USB	35A typical pulsed current enables single-shot laser diode drive at >100W peak power
BVCBO	>80V collector-base breakdown supports robust voltage margin during fast turn-off transients
BVCEO	>15V collector-emitter breakdown defines maximum safe operating voltage in avalanche mode
t_r	37ns rise time ensures sub-100ns pulse edges critical for time-of-flight resolution in LIDAR
R_θJC	12°C/W junction-to-case thermal resistance allows direct heat transfer to PCB copper pour for pulse duty cycling
C_ibo	49pF input capacitance minimizes base drive energy loss and preserves edge fidelity
h_FE	100 minimum DC current gain ensures reliable base triggering across temperature (-55°C to +150°C)

Pinout & Package

Package: W-DFN2020-3/SWP (Type A), 2.0mm × 2.0mm × 0.62mm, molded green plastic, wettable flanks, matte tin terminals.

Pin/Terminal	Circuit Role	Design Meaning
Collector (C)	Main high-current output path during avalanche conduction	Exposed pad on bottom surface; primary thermal and current path to PCB copper
Emitter (E)	Current return node tied to ground reference plane	Low-inductance connection essential for minimizing voltage overshoot during turn-off
Base (B)	Control terminal initiating avalanche breakdown	Requires fast, high-current drive (IB1 = 10mA/IB2 = −10mA) to ensure deterministic turn-on

Key Features

Feature	Design Value
Avalanche-optimized process control	Tight parameter distribution ensures repeatable I_USB and breakdown voltage across production lots
Low-profile 0.62mm height	Enables integration into space-constrained LIDAR modules and automotive radar front-ends
Sidewall tin plating	Supports automated optical inspection (AOI) of solder joint quality on all three visible flanks
Lead-free & halogen-free	Complies with RoHS 3 (2015/863/EU) and automotive green standards without compromising thermal performance
Moisture sensitivity Level 1	Eliminates bake requirements prior to reflow, reducing manufacturing cost and cycle time

Applications

LIDAR Laser Driver

Radar Pulse Generator

Use Scenario: Time-of-flight distance measurement using 905nm pulsed laser diodes in automotive ADAS systems.

IC Role / Device Role / Timing Role: Avalanche switch delivering 35A, 100ns pulses to laser diode anode with <37ns rise time.

Use Value: Enables centimeter-level ranging accuracy through precise pulse edge control and minimal jitter.

Use Scenario: Short-pulse transmitter in 24GHz/77GHz automotive radar front-end modules.

IC Role / Device Role / Timing Role: High-speed pulse generator driving antenna switch or mixer bias network.

Use Value: Delivers clean, repeatable 15V pulses with sub-100ns width for accurate target detection timing.

Fast Edge Switch

High-Speed Pulse Generator

Use Scenario: Digital test equipment requiring nanosecond-scale edge generation for signal integrity validation.

IC Role / Device Role / Timing Role: Low-inductance avalanche transistor used as active termination switch in pulse shaping networks.

Use Value: Achieves <50ns transition times without external snubbers, reducing board area and component count.

Use Scenario: Industrial time-domain reflectometry (TDR) systems for cable fault location.

IC Role / Device Role / Timing Role: Repetitive avalanche pulse source synchronized to sampling oscilloscope trigger.

Use Value: Provides stable 35A peak current pulses at variable repetition rates up to 1MHz with thermal stability.

Equivalent & Alternatives

The following parts are listed as comparable options for similar avalanche transistor applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
ZXTN2012ZTA	Higher BVCEO (20V), lower I_USB (20A typ), SOT-23 package with higher R_θJA (200°C/W)	Less suitable for high-energy LIDAR pulses; better for low-duty-cycle test equipment	Select when board space permits larger footprint and thermal budget allows higher junction rise
FMMT417FDBW-7	P-channel counterpart with identical package, BVCBO > 80V, but I_USB = 25A typ and slower t_r (55ns)	Used in complementary avalanche circuits or high-side switching where NPN topology is unsuitable	Choose only for P-channel polarity requirement; not a drop-in replacement due to polarity and timing mismatch

Compared with ZXTN2012ZTA and FMMT417FDBW-7, the FMMT411FDBW-7 delivers superior peak current and faster edges in the same compact DFN footprint, making it optimal for high-repetition-rate LIDAR and radar where thermal efficiency and edge fidelity are critical.

Availability

FMMT411FDBW-7 is available at Aetrix Electronics and suitable for LIDAR laser drivers, automotive radar transmitters, fast edge switch generators, and high-speed pulse generators requiring stable component supply and traceable sourcing.

Supply support for FMMT411FDBW-7 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design centers across Asia and Europe.

The FMMT series targets high-speed, high-reliability pulse switching applications, with the FMMT411FDBW specifically engineered for controlled avalanche operation in safety-critical sensing systems.

FAQ

What is the maximum safe avalanche energy per pulse for FMMT411FDBW-7?

The datasheet does not specify a fixed energy limit, but safe operation requires limiting total pulse energy using external capacitor (C_CE = 470pF) and charge voltage (V_CE = 70V) per the I_USB test condition. Energy must be kept below the second breakdown boundary, verified by thermal measurement under actual PCB layout and duty cycle.

Can FMMT411FDBW-7 be used in linear amplifier configurations?

No-it is not characterized or qualified for linear operation. Its process and packaging are optimized exclusively for pulsed avalanche switching. Linear use risks thermal runaway, inconsistent gain, and premature failure due to lack of SOA curves and safe operating area data beyond avalanche conditions.

Does the W-DFN2020-3 package require special reflow profile considerations?

Yes-the 0.62mm height and exposed collector pad demand precise reflow profiling: peak temperature must reach ≥235°C for proper solder wetting on the thermal pad, while maintaining ≤60s above 217°C to avoid delamination. Use stencil aperture design per Diodes' recommended pad layout to ensure void-free solder joints.

Is there an automotive-qualified version of this part?

Yes-the FMMT411FDBWQ variant is AEC-Q101 qualified and documented in a separate datasheet. It shares identical electrical and thermal specifications but includes extended reliability testing, enhanced traceability, and automotive-grade lot control for use in ADAS and radar systems.

FMMT411FDBW-7 Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: 3-UDFN Exposed Pad

Packaging:: Tape & Reel (TR)

Product Status:: Active

Transistor Type:: NPN - Avalanche Mode

Current - Collector (Ic) (Max):: 5 A

Voltage - Collector Emitter Breakdown (Max):: 15 V

Vce Saturation (Max) @ Ib, Ic:: 100mV @ 1mA, 10mA

Current - Collector Cutoff (Max):: 100nA (ICBO)

DC Current Gain (hFE) (Min) @ Ic, Vce:: 100 @ 10mA, 10V

Power - Max:: 1.7 W

Frequency - Transition:: 110MHz

Operating Temperature:: -55°C ~ 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: W-DFN2020-3 (Type A)

FMMT411FDBW-7 FAQ

1.How can I place an order for FMMT411FDBW-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for FMMT411FDBW-7 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for FMMT411FDBW-7 reliable?

The price and inventory of FMMT411FDBW-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FMMT411FDBW-7 is usually 5 days.

3.What payment methods are accepted for FMMT411FDBW-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FMMT411FDBW-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for FMMT411FDBW-7?

FMMT411FDBW-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your FMMT411FDBW-7 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for FMMT411FDBW-7?

For technical support, including FMMT411FDBW-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FMMT411FDBW-7 requirements.

6.How does Aetrix verify that FMMT411FDBW-7 is sourced from the original manufacturer or authorized distributors?

All FMMT411FDBW-7 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that FMMT411FDBW-7 meets industry standards.

7.What is the process for return or replacement of FMMT411FDBW-7?

All FMMT411FDBW-7 units undergo pre-shipment inspection (PSI). If there is an issue with FMMT411FDBW-7, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The FMMT411FDBW-7 part is unused and in its original packaging.

Return procedure for FMMT411FDBW-7:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

Tech Hub

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…

2026-08-18 Operational Amplifier (Op Amp): Basics, Configurations, Feedback and Applications

Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…

2026-08-14 Jumper Cables: How to Use, Connect and Choose Them Safely

Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…

2026-08-11 LDO Regulator: Dropout Voltage, Noise, PSRR and Power Dissipation

LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…

2026-08-06 Conditional Access Module: CAM, CI/CI+ and DVB Security

Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…

2026-08-03 Electronic Component Obsolescence: EOL Risks, Replacement Options and Last-Time Buy Strategy

Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.

2026-07-29 18650 Battery: Voltage, Capacity, Charging and Pack Design

18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…

2026-07-27 Hall Effect Sensor: Working Principle, Types, Circuits and Applications

Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…

2026-07-20 Product Change Notification (PCN) in Electronic Components: Meaning and Supply Chain Response

Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…

2026-07-19 Blend Door Actuator: Symptoms, Location, Reset and Replacement Guide

A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…