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

Diodes Incorporated FMMTL718TC

Name: FMMTL718TC
Brand: Diodes Incorporated
SKU: FMMTL718TC
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: FMMTL718TC

Manufacturer:: Diodes Incorporated

Category:: Single Bipolar Transistors

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

Datasheet:: FMMTL718TC.pdf

Description:: TRANS PNP 20V 1A SOT-23-3

Quantity:: RFQ Add To RFQ list

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Inventory:7,355

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Product details

Overview

FMMTL718TC from Diodes Incorporated is a PNP silicon low-saturation transistor in SOT-23 package, rated for -20V V_CEO, -1A continuous collector current, and V_CE(sat) < -320mV at -1A. It serves as a high-current switching element in MOSFET gate drive and DC-DC converter power stages, with AEC-Q101 qualification for automotive-grade reliability.

For engineers reviewing the FMMTL718TC datasheet, FMMTL718TC pinout, FMMTL718TC application, or FMMTL718TC equivalent, key selection criteria include verified V_CE(sat) performance at -1A, h_FE stability up to -1.5A, thermal resistance (R_θJA = 250°C/W), and complementary pairing with FMMTL618 for push-pull topologies.

Technical Context

This PNP transistor operates in linear and saturation modes with characterized h_FE down to -1.5A and guaranteed V_CE(sat) ≤ -320mV at -1A/−50mA base drive. Its f_T of 265MHz supports fast switching in gate-drive applications where turn-on/turn-off times are critical (t_on = 108ns, t_off = 121ns).

Designed for high-reliability power control, it features R_θJL = 197°C/W for improved thermal coupling to PCB copper, moisture sensitivity level 1 per J-STD-020D, and UL 94V-0 molded plastic case - enabling robust operation across -55°C to +150°C junction temperature range.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	-20V - Maximum safe collector-emitter voltage before breakdown under open-base conditions
I_C (continuous)	-1A - Sustained collector current capability without derating at T_A = 25°C
V_CE(sat)	< -320mV @ -1A/-50mA - Ensures minimal conduction loss and heat generation in high-current switch mode
h_FE	320 @ -1A/-2V - Confirmed current gain at full-rated load, supporting stable base drive design
P_D	500mW - Power dissipation limit on 15mm × 15mm FR4 PCB with 1 oz copper
f_T	265MHz - Enables use in high-frequency switching circuits such as synchronous rectification drivers
R_θJA	250°C/W - Thermal resistance defining junction-to-ambient temperature rise under standard mounting

Pinout & Package

Package: SOT-23 - Surface-mount plastic package with matte tin-plated Alloy 42 leadframe, UL 94V-0 rated, 0.008g weight, and moisture sensitivity level 1.

Pin/Terminal	Circuit Role	Design Meaning
E (Emitter)	Current source terminal for PNP operation	Connected to higher potential rail; carries full load current in high-side switch configuration
B (Base)	Control input for transistor biasing	Receives negative current to enable conduction; requires ≥ -50mA for full saturation at -1A
C (Collector)	Current sink terminal	Connected to load or switching node; voltage swing limited to -20V maximum relative to emitter

Key Features

Feature	Design Value
Low V_CE(sat) at high current	V_CE(sat) ≤ -320mV @ -1A ensures < 320mW conduction loss, reducing thermal stress in compact layouts
AEC-Q101 qualification	Validated for automotive power electronics including engine control and body modules requiring extended temperature and reliability compliance
Complementary pairing	FMMTL618 NPN counterpart enables matched push-pull driver stages with symmetrical switching characteristics
High f_T and fast switching	265MHz f_T, 108ns t_on, 121ns t_off support efficient operation in >100kHz DC-DC converters
Green construction	Lead-free, halogen-free, antimony-free per Diodes Inc.'s environmental policy - compliant with RoHS and JEDEC standards

Applications

Automotive Body Control Module

USB-C PD Power Path Switch

Use Scenario: Driving high-side MOSFETs in window lift, seat position, and lighting control circuits.

IC Role / Device Role / Timing Role: PNP switch providing controlled 12V rail connection with fast turn-off to prevent shoot-through during direction reversal.

Use Value: Low V_CE(sat) minimizes power loss and self-heating in space-constrained modules; AEC-Q101 rating ensures field reliability over 15-year vehicle life.

Use Scenario: Enabling/disabling 20V power delivery paths in USB-C PD adapters and docking stations.

IC Role / Device Role / Timing Role: High-speed power switch controlling VBUS path between AC/DC converter and Type-C port, synchronized with PD controller logic.

Use Value: 265MHz f_T and sub-130ns switching enable clean transitions during dynamic load changes, meeting USB PD 3.1 timing requirements.

Industrial DC-DC Converter Gate Driver

Lithium-Ion Battery Charging Circuit

Use Scenario: Driving external N-channel MOSFETs in isolated flyback or forward converter secondary-side synchronous rectification.

IC Role / Device Role / Timing Role: Fast-switching PNP stage translating PWM signals into high-current gate pulses with minimal propagation delay.

Use Value: Verified h_FE hold-up to -1.5A ensures consistent gate drive strength across load transients, improving efficiency at light and heavy loads.

Use Scenario: Controlling charging current flow from buck regulator to battery pack in portable medical devices and power tools.

IC Role / Device Role / Timing Role: Precision current-limiting switch placed in series with charge path, activated by battery management IC.

Use Value: Tight V_CE(sat) spec (< -320mV) enables accurate current sensing via shunt resistor without significant voltage drop error.

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
ZXTN2010Z	V_CEO = -20V, I_C = -1.25A, V_CE(sat) = -250mV @ -1A, but h_FE drops to 100 at -1A	Higher peak current but lower gain at full load - less suitable for base-current-limited gate drives	Select when lower V_CE(sat) is prioritized over gain stability at high current
DMT3005LKQ	V_CEO = -30V, I_C = -0.8A, V_CE(sat) = -350mV @ -0.8A, SOT-23-3 compatible but not AEC-Q101 qualified	Higher voltage rating but lower current and no automotive qualification - limited to industrial/commercial use	Select only for non-automotive designs requiring >20V blocking capability

Compared with ZXTN2010Z and DMT3005LKQ, FMMTL718TC uniquely balances -1A current, < -320mV saturation voltage, and AEC-Q101 qualification - making it optimal for automotive gate drivers where gain stability and reliability are jointly critical.

Availability

FMMTL718TC is available at Aetrix Electronics and suitable for automotive body control modules, USB-C PD power path switching, and industrial DC-DC converter gate driving requiring stable component supply across long production cycles.

Supply support for FMMTL718TC 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 power management, signal integrity, and protection solutions.

The FMMTL718TC belongs to Diodes' AEC-Q101-qualified low-saturation bipolar transistor product line, engineered specifically for automotive and industrial power switching applications demanding precise current control and thermal resilience.

FAQ

What is the maximum allowable base current for continuous operation?

The absolute maximum continuous base current is -200mA per the datasheet's "Maximum Ratings" table. However, for reliable saturation at -1A collector current, the recommended base drive is -50mA - exceeding this may cause excessive power dissipation in the base-emitter junction without proportional gain improvement.

Is FMMTL718TC pin-compatible with its complementary NPN part FMMTL618?

Yes - both FMMTL718TC (PNP) and FMMTL618 (NPN) use identical SOT-23 packages with matching pinout: Emitter (Pin 1), Base (Pin 2), Collector (Pin 3). This allows direct layout reuse in complementary driver stages without footprint modification.

Does the device require a heatsink in typical SOT-23 mounting?

No heatsink is required under standard conditions: on a 15mm × 15mm FR4 board with 1 oz copper, the 500mW power dissipation yields a junction-to-ambient rise of ~125°C at full load, staying within the -55°C to +150°C operating range. Layout optimization (copper pour under collector pad) further reduces thermal resistance.

How does the h_FE variation affect gate drive design at 1.5A peak?

At -1.5A, h_FE is specified minimum 80 - meaning ≥ -18.75mA base current is needed for full saturation. Designers must ensure driver circuitry can source this current without voltage droop, especially during pulse loads, to avoid unintended linear-mode operation and thermal runaway.

FMMTL718TC 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 A

Voltage - Collector Emitter Breakdown (Max):: 20 V

Vce Saturation (Max) @ Ib, Ic:: 450mV @ 100mA, 1.5A

Current - Collector Cutoff (Max):: 10nA

DC Current Gain (hFE) (Min) @ Ic, Vce:: 200 @ 500mA, 2V

Power - Max:: 500 mW

Frequency - Transition:: 265MHz

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-23-3

FMMTL718TC FAQ

1.How can I place an order for FMMTL718TC through Aetrix?

Please submit a Request for Quotation (RFQ) for FMMTL718TC 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 FMMTL718TC reliable?

The price and inventory of FMMTL718TC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FMMTL718TC is usually 5 days.

3.What payment methods are accepted for FMMTL718TC?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FMMTL718TC transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for FMMTL718TC?

FMMTL718TC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your FMMTL718TC 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 FMMTL718TC?

For technical support, including FMMTL718TC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FMMTL718TC requirements.

6.How does Aetrix verify that FMMTL718TC is sourced from the original manufacturer or authorized distributors?

All FMMTL718TC 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 FMMTL718TC meets industry standards.

7.What is the process for return or replacement of FMMTL718TC?

All FMMTL718TC units undergo pre-shipment inspection (PSI). If there is an issue with FMMTL718TC, 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 FMMTL718TC part is unused and in its original packaging.

Return procedure for FMMTL718TC:

1.Submit a request within 90 days.

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

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