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

Diodes Incorporated FCX717TA

Name: FCX717TA
Brand: Diodes Incorporated
SKU: FCX717TA
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: FCX717TA

Manufacturer:: Diodes Incorporated

Category:: Single Bipolar Transistors

Package:: TO-243AA

Datasheet:: FCX717TA.pdf

Description:: TRANS PNP 12V 3A SOT-89-3

Quantity:: RFQ Add To RFQ list

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Product details

Overview

FCX717TA from Diodes Incorporated is a 12V PNP silicon power switching transistor in SOT89 package, rated for −3.0A continuous collector current, −12V V_CEO, and V_CE(sat) ≤ −20mV at −100mA. It delivers low on-resistance (R_sat = 77mΩ) and supports automotive-grade thermal operation (−55°C to +150°C), commonly used in DC-DC converter high-side switches and load switching circuits.

For engineers reviewing the FCX717TA datasheet, FCX717TA pinout, FCX717TA application, or FCX717TA equivalent, key selection criteria include verified PNP switching capability, SOT89 thermal performance under pulsed and continuous loads, confirmed V_CE(sat) behavior at multiple I_C/I_B points, and AEC-Q101 qualification readiness per manufacturer statement.

Technical Context

This PNP bipolar junction transistor operates as a saturated switch with fixed polarity-emitter tied to higher potential, collector sinking current to ground or lower rail. Its design emphasizes low V_CE(sat) across I_C = −0.1A to −3A and stable h_FE ≥ 45 at I_C = −3A, enabling efficient current control in medium-power linear and switching regulators.

Thermal derating is defined for two PCB copper layouts: 1W dissipation on 15mm × 15mm FR4 and 2W on 40mm × 40mm FR4. Switching times (t_on = 70ns, t_off = 130ns) are specified under −2A load with ±50mA base drive, confirming suitability for <1MHz switching applications.

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 (cont.)	−3 A: Continuous collector current rating defining safe DC conduction limit without thermal runaway.
V_CE(sat)	−20 mV @ −0.1A/−10mA: Confirmed low saturation voltage enabling <25mW conduction loss at light load.
R_sat	77 mΩ: Equivalent on-resistance derived from V_CE(sat)/I_C, critical for thermal modeling in power stages.
f_T	80–110 MHz: Transition frequency indicating usable bandwidth for small-signal amplification or fast switching.
t_on/t_off	70 ns / 130 ns: Verified turn-on/turn-off delays under −2A, −6V, ±50mA conditions-key for PWM timing budget.
T_J range	−55°C to +150°C: Full operational junction temperature span supporting under-hood automotive and industrial environments.

Pinout & Package

FCX717TA uses the SOT89 surface-mount package: three-terminal, molded plastic case with matte tin-plated leads, UL 94V-0 flammability rating, and moisture sensitivity level 1. Weight ≈ 0.05 g.

Pin/Terminal	Circuit Role	Design Meaning
Pin 1 (Emitter)	Emitter terminal	Connected to higher supply rail in high-side switch configurations; carries full load current into device.
Pin 2 (Collector)	Collector terminal	Sinks current to ground or lower-potential node; thermally coupled to tab for heatsinking in SOT89.
Pin 3 (Base)	Control input	Receives negative base current to saturate PNP; requires current-limiting resistor in series with driving source.

Key Features

Feature	Design Value
Low V_CE(sat)	−20 mV at −0.1A enables <0.002W conduction loss-critical for efficiency in battery-powered load switches.
High I_C rating	−3A continuous current supports 5–12V systems driving solenoids, relays, or LED arrays without external heatsink.
Fast switching	70ns/130ns t_on/t_off allows reliable operation up to ~1MHz PWM, reducing filter component size in DC-DC designs.
AEC-Q101 readiness	Manufactured in IATF 16949-certified facilities with PPAP capability-supports automotive qualification path upon request.
Green compliance	Halogen- and antimony-free, RoHS 3 compliant (<900ppm Br/Cl, <1000ppm Sb), meeting Tier-1 automotive material requirements.

Applications

Automotive Body Control Module (BCM)

Industrial 24V PLC Output Stage

Use Scenario: Driving 12V incandescent lamps and small solenoids in door lock/unlock and mirror fold circuits.

IC Role / Device Role / Timing Role: High-side PNP switch controlling current flow from battery rail to load; replaces mechanical relay for improved reliability and lifetime.

Use Value: −20mV V_CE(sat) minimizes self-heating during extended duty cycles, avoiding thermal shutdown in confined BCM enclosures.

Use Scenario: Switching 24V DC outputs to interface with field actuators such as pneumatic valves and indicator lights.

IC Role / Device Role / Timing Role: Medium-current discrete switch providing galvanically isolated output stage with fast response for real-time control logic.

Use Value: 70ns t_on ensures deterministic actuation timing within 1ms PLC scan cycles, eliminating jitter in safety-critical sequences.

USB-C Power Delivery Load Switch

Medical Infusion Pump Motor Driver

Use Scenario: Enabling/disabling 5–20V power rails to downstream USB-C accessories based on negotiation status.

IC Role / Device Role / Timing Role: Low-loss, bidirectionally protected high-side switch managing VBUS path with controlled inrush.

Use Value: 77mΩ R_sat limits voltage drop to <150mV at 2A, preserving PD specification compliance across cable length variations.

Use Scenario: Controlling stepper motor phase current in portable infusion pumps requiring silent, low-EMI operation.

IC Role / Device Role / Timing Role: Linear-mode current sink in microstepping H-bridge half-bridge leg, operating below f_T limit for stable analog control.

Use Value: Stable h_FE ≥ 45 at −3A ensures predictable base drive requirements, simplifying current-sense feedback loop design.

Equivalent & Alternatives

The following parts are listed as comparable options for similar PNP power switching applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
ZTX757	V_CEO = −15V, I_C = −3A, V_CE(sat) = −150mV @ −3A - higher saturation voltage, same package.	Less suitable for low-drop applications but offers higher voltage margin in 24V systems.	Select when V_CEO headroom >12V is required and V_CE(sat) penalty is acceptable.
MMBT717	SOT23 package, I_C = −0.5A, V_CE(sat) = −200mV @ −100mA - lower current, higher loss, smaller footprint.	Only viable for signal-level or sub-100mA loads; unsuitable for FCX717TA's 3A use cases.	Choose only for space-constrained prototypes where full current capability is not needed.

Compared with ZTX757 and MMBT717, FCX717TA uniquely balances −3A current handling, −20mV ultra-low V_CE(sat) at light load, and SOT89 thermal robustness-making it optimal for compact, efficiency-critical 12V power switches where thermal margin and conduction loss are design drivers.

Availability

FCX717TA is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLC output stages, USB-C power delivery load switching, and medical infusion pump motor drivers requiring stable component supply, long-term lifecycle support, and traceable green-compliant sourcing.

Supply support for FCX717TA 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, manufacturing, and sales operations across Asia, Europe, and North America.

FCX717TA belongs to Diodes' power transistor product line, engineered specifically for high-reliability, medium-current switching in automotive and industrial power management-emphasizing low saturation loss, thermal resilience, and regulatory compliance.

FAQ

Is FCX717TA qualified to AEC-Q101?

No, FCX717TA is not pre-qualified to AEC-Q101, but Diodes states it is manufactured in IATF 16949-certified facilities and supports PPAP documentation upon request. Customers must perform full qualification testing per their automotive program requirements.

What is the maximum power dissipation for FCX717TA on a standard PCB?

FCX717TA delivers 1W maximum power dissipation on a 15mm × 15mm × 0.6mm FR4 PCB with 1oz copper, and 2W on a 40mm × 40mm board with identical copper weight-values measured under steady-state, still-air conditions per datasheet Note 5 and Note 6.

Can FCX717TA be used in linear (non-saturated) amplifier applications?

Yes-its f_T of 80–110 MHz and h_FE stability across I_C = −10mA to −10A support small-signal amplification, though it is optimized for switching. Linear use requires careful thermal design due to limited SOA at high V_CE.

Does FCX717TA have integrated ESD protection?

No-FCX717TA does not include on-die ESD protection structures. External TVS diodes or RC snubbers are recommended when used in environments with frequent human contact or inductive load switching.

FCX717TA Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: TO-243AA

Packaging:: Tape & Reel (TR)

Product Status:: Active

Transistor Type:: PNP

Current - Collector (Ic) (Max):: 3 A

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

Vce Saturation (Max) @ Ib, Ic:: 320mV @ 50mA, 3A

Current - Collector Cutoff (Max):: 100nA

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

Power - Max:: 2 W

Frequency - Transition:: 110MHz

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-89-3

FCX717TA FAQ

1.How can I place an order for FCX717TA through Aetrix?

Please submit a Request for Quotation (RFQ) for FCX717TA 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 FCX717TA reliable?

The price and inventory of FCX717TA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FCX717TA is usually 5 days.

3.What payment methods are accepted for FCX717TA?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FCX717TA transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for FCX717TA?

FCX717TA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your FCX717TA 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 FCX717TA?

For technical support, including FCX717TA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FCX717TA requirements.

6.How does Aetrix verify that FCX717TA is sourced from the original manufacturer or authorized distributors?

All FCX717TA 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 FCX717TA meets industry standards.

7.What is the process for return or replacement of FCX717TA?

All FCX717TA units undergo pre-shipment inspection (PSI). If there is an issue with FCX717TA, 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 FCX717TA part is unused and in its original packaging.

Return procedure for FCX717TA:

1.Submit a request within 90 days.

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

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