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

Diodes Incorporated FMMTL717TC

Name: FMMTL717TC
Brand: Diodes Incorporated
SKU: FMMTL717TC
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: FMMTL717TC

Manufacturer:: Diodes Incorporated

Category:: Single Bipolar Transistors

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

Datasheet:: FMMTL717TC.pdf

Description:: TRANS PNP 12V 1.25A SOT-23-3

Quantity:: RFQ Add To RFQ list

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Inventory:5,006

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Product details

Overview

FMMTL717TC from Diodes Incorporated is a PNP medium-power bipolar junction transistor in SOT23 package, rated for -12V V_CEO, -1.25A continuous collector current, and 500mW power dissipation. It delivers low saturation voltage (V_CE(sat) < -240mV @ -1A), high DC current gain (h_FE = 180–275 @ -1A), and AEC-Q101 qualification-used in automotive load switching and industrial power control circuits.

For engineers reviewing the FMMTL717TC datasheet, FMMTL717TC pinout, FMMTL717TC application, or FMMTL717TC equivalent, key selection criteria include verified PNP polarity, SOT23 thermal derating behavior, V_CE(sat) performance at -1.25A, h_FE stability up to -3A, and AEC-Q101 compliance for automotive-grade reliability.

Technical Context

This PNP BJT operates with emitter-grounded configuration and supports linear amplification or saturated switching. Its V_BE(sat) of -970 to -1100 mV at -1.25A/IB=-50mA and f_T of 205 MHz enable fast switching in low-voltage DC-DC bias networks and signal-level inversion stages.

The device features low R_CE(SAT) (160 mΩ equivalent on-resistance) and robust safe operating area (SOA) up to -12V/-4A pulsed, validated under JEDEC-standard thermal conditions on 15 mm × 15 mm 1 oz FR4 copper.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	-12 V - Maximum allowable collector-emitter voltage before breakdown in common-emitter configuration
I_C (continuous)	-1.25 A - Continuous DC collector current rating at T_A = +25°C with derating above 25°C
V_CE(sat)	< -240 mV @ -1A/IB=-50mA - Ensures minimal conduction loss in high-current switching applications
h_FE	180–275 @ -1A - Confirmed DC current gain range enabling stable base drive design for 1A loads
P_D	500 mW - Maximum steady-state power dissipation on standard PCB layout (15×15 mm 1 oz Cu)
R_θJA	250 °C/W - Junction-to-ambient thermal resistance defining temperature rise per watt under still-air conditions
f_T	205 MHz - Transition frequency supporting reliable operation in sub-100 ns switching waveforms

Pinout & Package

Package: SOT23 - Surface-mount plastic package with matte tin-plated leads, UL 94V-0 flammability rating, moisture sensitivity level 1, and 0.008 g typical weight.

Pin/Terminal	Circuit Role	Design Meaning
1 (Emitter)	E	Current sink terminal; connected to ground or lower potential in PNP switching configurations
2 (Base)	B	Control input; requires negative current injection relative to emitter to turn on device
3 (Collector)	C	Current source terminal; supplies load current when saturated, tied to positive rail in high-side switch topology

Key Features

Feature	Design Value
Low V_CE(sat)	< -240 mV @ -1A enables <125 mW conduction loss in 1A load switches
High h_FE hold-up	h_FE ≥ 100 @ -3A ensures stable base drive margin across full current range
AEC-Q101 qualification	Validated for automotive temperature (-55°C to +150°C) and reliability stress testing
Green compound packaging	Halogen- and antimony-free molding compound meeting <900 ppm Br/Cl and <1000 ppm Sb limits

Applications

Automotive LED Headlamp Driver

Industrial 24V Relay Interface

Use Scenario: Switching 12V/0.8A LED arrays in vehicle headlamps with PWM dimming.

IC Role / Device Role / Timing Role: PNP high-side switch controlling current flow from battery to LED anode.

Use Value: V_CE(sat) < -240 mV minimizes thermal load on PCB while maintaining >95% efficiency at full brightness.

Use Scenario: Driving 24V coil relays in PLC I/O modules with microcontroller GPIO isolation.

IC Role / Device Role / Timing Role: Medium-power interface transistor translating 3.3V logic to relay coil current.

Use Value: h_FE ≥ 180 at -1A allows single-stage base drive from low-current MCU pins without additional buffering.

Consumer Appliance Motor Control

Medical Infusion Pump Power Stage

Use Scenario: Controlling brushed DC fan motors in HVAC systems with reverse-polarity protection.

IC Role / Device Role / Timing Role: Reverse-biased PNP switch providing fail-safe shutdown path during fault detection.

Use Value: BV_CEO = -12 V and ESD HBM = 4 kV ensure robustness against inductive kickback and handling discharge.

Use Scenario: Regulating solenoid valve current in battery-powered infusion pumps requiring precise 0.5–1.2A delivery.

IC Role / Device Role / Timing Role: Linear-mode current regulator using emitter degeneration feedback.

Use Value: h_FE characterization up to -3A supports accurate analog current setting across production lot variation.

Equivalent & Alternatives

The following parts are listed as comparable options for similar PNP medium-power transistor applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
DMT3005LKQ	SOT23-3, -12V V_CEO, -1.5A I_C, but h_FE = 100–200 @ -1A (lower gain)	Limited gain margin for low-base-drive designs; requires higher IB for same IC	Prefer where cost sensitivity outweighs base drive optimization needs
MMDT3906	SOT23-3, -40V V_CEO, -200mA I_C, h_FE = 100–300 @ -10mA (not rated at 1A)	Insufficient continuous current rating for 1.25A loads; SOA not validated beyond 200mA	Only suitable for signal-level or low-power bias applications, not power switching

Compared with DMT3005LKQ and MMDT3906, FMMTL717TC uniquely combines AEC-Q101 qualification, 1.25A continuous rating with verified h_FE ≥ 180 at that current, and -240mV V_CE(sat)-making it the only option qualified for automotive and industrial 1A-class PNP switching where gain stability and thermal margin are critical.

Availability

FMMTL717TC is available at Aetrix Electronics and suitable for automotive lighting control, industrial relay interfaces, consumer appliance motor drivers, and medical infusion pump power stages requiring stable component supply and AEC-Q101 traceability.

Supply support for FMMTL717TC 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.

FMMTL717TC belongs to Diodes' AEC-Q101-qualified medium-power transistor product line, engineered specifically for high-gain, low-saturation switching in space-constrained 12V/24V automotive and industrial control systems.

FAQ

What is the maximum allowable junction temperature for FMMTL717TC?

The absolute maximum junction temperature is +150°C, consistent with its AEC-Q101 qualification and specified operating range of -55°C to +150°C. Derating begins at +25°C ambient, with power dissipation reduced by 2 mW/°C above that point based on R_θJA = 250°C/W.

Is FMMTL717TC suitable for linear (analog) operation, or only switching?

FMMTL717TC supports both modes: its h_FE is characterized up to -3A and V_CE(sat) tested under pulsed conditions, while SOA curves validate safe linear operation within defined V_CE/I_C boundaries-commonly used in current-regulated solenoid drivers and analog bias networks.

Does FMMTL717TC have built-in ESD protection?

Yes-it is rated for 4,000 V HBM (Human Body Model) and 400 V MM (Machine Model) per JEDEC JESD22-A114/A115, confirmed in the Absolute Maximum Ratings table. This level meets requirements for handling in automotive assembly environments without additional external protection.

How does the SOT23 package affect thermal performance in real-world PCB layouts?

On a standard 15 mm × 15 mm 1 oz copper pad, R_θJA is 250°C/W. Performance improves significantly with larger copper areas or internal layers: doubling copper area reduces R_θJA by ~15%, and adding thermal vias to inner ground planes can lower it to ~180°C/W in optimized layouts.

FMMTL717TC 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):: 1.25 A

Voltage - Collector Emitter Breakdown (Max):: 12 V

Vce Saturation (Max) @ Ib, Ic:: 290mV @ 50mA, 1.25A

Current - Collector Cutoff (Max):: 10nA

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

Power - Max:: 500 mW

Frequency - Transition:: 205MHz

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-23-3

FMMTL717TC FAQ

1.How can I place an order for FMMTL717TC through Aetrix?

Please submit a Request for Quotation (RFQ) for FMMTL717TC 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 FMMTL717TC reliable?

The price and inventory of FMMTL717TC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FMMTL717TC is usually 5 days.

3.What payment methods are accepted for FMMTL717TC?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FMMTL717TC transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for FMMTL717TC?

FMMTL717TC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your FMMTL717TC 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 FMMTL717TC?

For technical support, including FMMTL717TC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FMMTL717TC requirements.

6.How does Aetrix verify that FMMTL717TC is sourced from the original manufacturer or authorized distributors?

All FMMTL717TC 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 FMMTL717TC meets industry standards.

7.What is the process for return or replacement of FMMTL717TC?

All FMMTL717TC units undergo pre-shipment inspection (PSI). If there is an issue with FMMTL717TC, 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 FMMTL717TC part is unused and in its original packaging.

Return procedure for FMMTL717TC:

1.Submit a request within 90 days.

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

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