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

Diodes Incorporated FMMT720TC

Name: FMMT720TC
Brand: Diodes Incorporated
SKU: FMMT720TC
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: FMMT720TC

Manufacturer:: Diodes Incorporated

Category:: Single Bipolar Transistors

Package:: TO-236-3, SC-59, SOT-23-3

Datasheet:: FMMT720TC.pdf

Description:: TRANS PNP 40V 1.5A SOT-23-3

Quantity:: RFQ Add To RFQ list

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Inventory:3,802

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Product details

Overview

FMMT720TC from Diodes Incorporated is a 40V PNP silicon low-saturation transistor in SOT23 package, designed for high-current switching with V_CE(sat) < −220 mV at −1 A, R_CE(SAT) = 163 mΩ, and continuous collector current of −1.5 A. It serves as a gate driver for MOSFETs/IGBTs and power switch in DC-DC converters and charging circuits.

For engineers reviewing the FMMT720TC datasheet, FMMT720TC pinout, FMMT720TC application, or FMMT720TC equivalent, key selection criteria include guaranteed −40 V V_CEO, AEC-Q101 qualification, thermal resistance of 155 °C/W (short pulse), h_FE ≥ 180 at −1 A, and SOT23 mechanical compatibility with automated assembly.

Technical Context

This PNP bipolar junction transistor operates in linear and saturated switching modes, with breakdown ratings of −40 V V_CEO and −7 V V_EBO. Its h_FE is characterized up to −3 A, supporting robust current gain hold-up under high-load transients.

The device delivers low on-resistance (163 mΩ) and fast switching performance: t_on = 40 ns and t_off = 435 ns under specified test conditions (V_CC = −15 V, I_C = −0.75 A). It is thermally rated for −55 °C to +150 °C operation and qualified to AEC-Q101 for automotive reliability.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	−40 V - maximum safe collector-emitter voltage before avalanche conduction
I_C (continuous)	−1.5 A - steady-state current handling capacity without thermal runaway
V_CE(sat) @ −1 A	< −220 mV - ensures minimal conduction loss and heat generation in switching mode
R_CE(SAT)	163 mΩ - enables precise modeling of on-state power dissipation in layout simulation
h_FE @ −1 A	180–290 - provides stable base drive margin for reliable saturation across temperature
f_T	150–180 MHz - supports high-frequency switching control loops up to ~30 MHz practical bandwidth
P_D (pulsed)	806 mW - usable peak power under short-duration pulses (t ≤ 5 sec) on standard PCB

Pinout & Package

Package: SOT23 - surface-mount plastic case, 0.008 g weight, UL 94V-0 rated, moisture sensitivity level 1, matte tin-plated leads.

Pin/Terminal	Circuit Role	Design Meaning
1 (Emitter)	Current source terminal for PNP operation	Connected to higher potential rail; carries full load current in high-side switch configuration
2 (Base)	Control input for minority-carrier injection	Requires −500 mA max drive; logic-level compatible with open-drain drivers or microcontroller GPIO
3 (Collector)	Current sink terminal	Connected to load or switching node; low R_CE(SAT) minimizes voltage drop during conduction

Key Features

Feature	Design Value
AEC-Q101 qualification	Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD (HBM 4 kV)
Low V_CE(sat) at high current	< −220 mV @ −1 A enables >98% efficiency in 12 V power switches with <150 mW conduction loss
High h_FE hold-up to −3 A	Maintains minimum h_FE = 12 at −3 A, ensuring predictable base drive sizing for overcurrent protection
SOT23 footprint compatibility	Standardized 2.9 mm × 1.3 mm outline with 0.95 mm pin pitch supports high-density PCB layouts and reflow assembly

Applications

Gate Driver for Power Switches

DC-DC Converter High-Side Switch

Use Scenario: Driving gates of N-channel MOSFETs or IGBTs in half-bridge inverters and motor controllers.

IC Role / Device Role / Timing Role: PNP current-source switch providing fast turn-on/turn-off of gate capacitance with controlled dV/dt.

Use Value: Low V_CE(sat) and 435 ns t_off reduce switching losses and prevent shoot-through in synchronous topologies.

Use Scenario: High-side switching element in buck, boost, and SEPIC converter output stages.

IC Role / Device Role / Timing Role: Active pull-up switch enabling regulated positive output voltage referenced to ground.

Use Value: −40 V V_CEO and 163 mΩ R_CE(SAT) support 24 V industrial input rails with <0.4 W conduction loss at 1.5 A.

Automotive Charging Circuit

Industrial Load Switch

Use Scenario: Battery isolation and charge path control in 12 V vehicle systems with reverse-polarity protection.

IC Role / Device Role / Timing Role: Reverse-biased PNP switch blocking reverse current while conducting forward charge current.

Use Value: AEC-Q101 qualification and −55 °C to +150 °C rating ensure operation across engine bay thermal extremes.

Use Scenario: Solid-state replacement for mechanical relays in PLC I/O modules and sensor power distribution.

IC Role / Device Role / Timing Role: Low-loss, fast-response power switch controlling 1–2 A loads with microcontroller interface.

Use Value: 625 mW continuous power dissipation and 200 °C/W R_θJA allow direct mounting on FR4 without heatsink in ambient ≤ 70 °C.

Equivalent & Alternatives

The following parts are listed as comparable options for similar PNP low-saturation transistor applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
ZXT720MATA	Same SOT23-3 package, −40 V V_CEO, but lower h_FE (min 100 @ −1 A) and higher V_CE(sat) (−300 mV @ −1 A)	Limited to lower-speed switching where gain margin is less critical	Select when cost priority outweighs saturation loss and gain stability requirements
FMMT718TC	Complementary NPN version with +40 V V_CEO, identical package and thermal specs, but opposite polarity and drive logic	Used in emitter-follower or low-side configurations requiring NPN topology	Choose only for NPN-based circuit architecture; not a functional drop-in replacement

Compared with ZXT720MATA and FMMT718TC, FMMT720TC offers superior h_FE retention at high current and lowest V_CE(sat), making it optimal for thermally constrained, high-efficiency PNP switching where base drive capability and conduction loss are critical.

Availability

FMMT720TC is available at Aetrix Electronics and suitable for automotive gate driving, industrial DC-DC converters, and battery charging circuits requiring stable component supply with AEC-Q101 compliance and long-term lifecycle assurance.

Supply support for FMMT720TC 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, specializing in high-reliability components for automotive, industrial, and computing markets.

The FMMT720TC belongs to Diodes' FMMT series of low-saturation bipolar transistors, engineered specifically for efficient, high-current switching in space-constrained power management applications.

FAQ

What is the maximum allowable base current for continuous operation?

The absolute maximum continuous base current is −500 mA, as specified in the Maximum Ratings table. Exceeding this risks metallization failure or bond wire lift. For reliable design, base current should be limited to ≤ −100 mA under continuous DC conditions, aligning with the −1.5 A I_C rating and h_FE derating curve.

Does FMMT720TC support pulsed operation beyond its continuous ratings?

Yes - it supports −4 A peak pulse current (I_CM) with duty cycle ≤ 2% and pulse width ≤ 300 µs. This enables short-duration surge handling in motor startup or inrush limiting, provided thermal accumulation is managed using the transient thermal impedance curves in the datasheet.

How does the AEC-Q101 qualification impact board-level reliability?

AEC-Q101 qualification confirms pass/fail testing across temperature cycling, highly accelerated life testing (HALT), and ESD (HBM 4 kV), ensuring the device withstands automotive-grade thermal stress and electrostatic events. It does not guarantee system-level fault tolerance but validates component robustness under defined stress profiles.

Can FMMT720TC replace a small-signal PNP transistor like BC807 in existing designs?

No - FMMT720TC is a power-switching transistor with −1.5 A I_C and 625 mW P_D, whereas BC807 is rated for −500 mA and 310 mW. Substitution requires verification of thermal margin, base drive capability, and SOA compliance; layout changes may be needed due to higher power dissipation and different h_FE profile.

FMMT720TC Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: TO-236-3, SC-59, SOT-23-3

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Transistor Type:: PNP

Current - Collector (Ic) (Max):: 1.5 A

Voltage - Collector Emitter Breakdown (Max):: 40 V

Vce Saturation (Max) @ Ib, Ic:: 330mV @ 100mA, 1.5A

Current - Collector Cutoff (Max):: 100nA

DC Current Gain (hFE) (Min) @ Ic, Vce:: 300 @ 100mA, 2V

Power - Max:: 625 mW

Frequency - Transition:: 190MHz

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-23-3

FMMT720TC FAQ

1.How can I place an order for FMMT720TC through Aetrix?

Please submit a Request for Quotation (RFQ) for FMMT720TC 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 FMMT720TC reliable?

The price and inventory of FMMT720TC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FMMT720TC is usually 5 days.

3.What payment methods are accepted for FMMT720TC?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FMMT720TC transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for FMMT720TC?

FMMT720TC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your FMMT720TC 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 FMMT720TC?

For technical support, including FMMT720TC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FMMT720TC requirements.

6.How does Aetrix verify that FMMT720TC is sourced from the original manufacturer or authorized distributors?

All FMMT720TC 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 FMMT720TC meets industry standards.

7.What is the process for return or replacement of FMMT720TC?

All FMMT720TC units undergo pre-shipment inspection (PSI). If there is an issue with FMMT720TC, 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 FMMT720TC part is unused and in its original packaging.

Return procedure for FMMT720TC:

1.Submit a request within 90 days.

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

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