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

Diodes Incorporated FCX1147ATA

Name: FCX1147ATA
Brand: Diodes Incorporated
SKU: FCX1147ATA
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: FCX1147ATA

Manufacturer:: Diodes Incorporated

Category:: Single Bipolar Transistors

Package:: TO-243AA

Datasheet:: FCX1147ATA.pdf

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

Quantity:: RFQ Add To RFQ list

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Inventory:3,772

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Product details

Overview

FCX1147ATA from Diodes Incorporated is a PNP low-saturation bipolar junction transistor in SOT89 package, rated for -12V V_CEO, -3A continuous collector current, and -20A peak pulse current. It delivers V_CE(sat) ≤ -50 mV at -0.1A and exhibits R_sat = 53 mΩ, enabling high-efficiency switching in automotive load control and industrial power regulation circuits.

For engineers reviewing the FCX1147ATA datasheet, FCX1147ATA pinout, FCX1147ATA application, or FCX1147ATA equivalent, key selection criteria include its low V_CE(sat) performance at high current, AEC-Q101 readiness (per manufacturer statement), thermal derating on FR4 PCBs, and SOT89 mechanical compatibility with high-power surface-mount layouts.

Technical Context

This PNP transistor operates in linear and saturated switching modes with guaranteed breakdown ratings: V_CBO = -15 V, V_EBO = -5 V, and safe operating area validated up to -5A/ -10V in pulsed conditions. Its f_T = 115 MHz supports fast turn-on/turn-off transitions.

DC current gain h_FE ranges from 90 (at -3A) to 450 (at -10mA), supporting both precision biasing and high-current drive. Switching times are t_on = 150 ns and t_off = 220 ns under -4A, -10V conditions with ±40 mA base drive.

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)	-3 A - Continuous DC collector current capability with appropriate PCB copper area (15 mm × 15 mm, 1 oz)
V_CE(sat)	≤ -50 mV @ -0.1A/ -1mA - Enables <50 mW conduction loss per switch at light load, critical for battery-powered systems
R_sat	53 mΩ - Equivalent on-resistance derived from V_CE(sat)/I_C, used for thermal modeling and efficiency estimation
f_T	115 MHz - Transition frequency confirming suitability for medium-speed switching (e.g., PWM up to ~10 MHz)
P_D (max)	2 W - Maximum power dissipation when mounted on 40 mm × 40 mm, 1 oz copper PCB, defining heatsinking requirements
t_on/t_off	150 ns / 220 ns - Measured with -4A load, -10V V_CC, ±40 mA base drive; determines minimum achievable PWM period

Pinout & Package

Package: SOT89 - Surface-mount plastic package with integrated heat sink tab (pin 3), rated for 2 W dissipation on adequate copper area, UL 94V-0 compliant, moisture sensitivity level 1.

Pin/Terminal	Circuit Role	Design Meaning
1 (Emitter)	Emitter terminal of PNP transistor	Connected to higher potential rail; carries full load current; requires low-impedance return path for stable biasing
2 (Base)	Control input for transistor conduction	Receives negative current to turn on; requires current-limiting resistor to prevent IB > -500 mA absolute max
3 (Collector / Tab)	Collector terminal and thermal pad	Electrically connected to collector; must be soldered to large copper pour for thermal management and EMI reduction

Key Features

Feature	Design Value
Low saturation voltage	V_CE(sat) ≤ -50 mV @ -0.1A enables <50 mW conduction loss, reducing thermal stress in compact power stages
AEC-Q101 readiness	Qualified for automotive applications per manufacturer statement; supports PPAP and IATF 16949 manufacturing
Green construction	Halogen- and antimony-free, RoHS 3 compliant (Br+Cl <1500 ppm, Sb <1000 ppm), meeting Tier-1 automotive material requirements
Robust SOA	Validated safe operating area up to -5A/-10V (10 ms pulse), supporting surge-tolerant motor and solenoid drive

Applications

Automotive Body Control Module

Industrial 24V Relay Driver

Use Scenario: Driving door lock actuators and interior lighting loads in 12V vehicle electrical systems.

IC Role / Device Role / Timing Role: PNP high-side switch controlling ground-referenced loads via emitter-follower configuration.

Use Value: Low V_CE(sat) minimizes voltage drop across switch, preserving actuator torque and lamp brightness at cold-cranking voltages.

Use Scenario: Replacing electromechanical relays in programmable logic controller (PLC) output modules.

IC Role / Device Role / Timing Role: Solid-state high-side switch interfacing microcontroller GPIO to 24V industrial loads.

Use Value: 220 ns turn-off time enables reliable 10 kHz PWM control of solenoids without contact bounce or arcing.

DC-DC Converter Synchronous Rectifier

Thermal Management Fan Controller

Use Scenario: Active rectification in non-isolated buck converter secondary side for improved efficiency.

IC Role / Device Role / Timing Role: PNP switch configured as synchronous rectifier, driven by gate driver with complementary timing.

Use Value: 53 mΩ R_sat reduces conduction loss vs. Schottky diode, increasing converter efficiency by ≥1.2% at 2A output.

Use Scenario: Controlling brushed DC cooling fans in telecom power supplies and server PSUs.

IC Role / Device Role / Timing Role: High-current linear regulator stage or PWM-controlled pass element for precise fan speed modulation.

Use Value: h_FE ≥ 90 at -3A ensures stable base drive margin under temperature variation, preventing thermal runaway.

Equivalent & Alternatives

The following parts are listed as comparable options for similar PNP high-current switching applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
ZTX951	V_CEO = -100 V, I_C = -3 A, V_CE(sat) = -300 mV @ -1A - higher voltage rating but 6× higher saturation voltage	Suitable for higher-voltage industrial controls where low V_CE(sat) is secondary to breakdown margin	Select when system transients exceed -12 V but thermal budget allows higher conduction loss
MJD2955T4G	V_CEO = -60 V, I_C = -10 A, SOT-223 package - higher current, larger footprint, 2× thermal resistance	Better for sustained >5A loads with external heatsink; incompatible with SOT89 board space	Choose when continuous current exceeds 3A and PCB layout permits larger package

Compared with ZTX951 and MJD2955T4G, FCX1147ATA offers the lowest V_CE(sat) in SOT89 form factor, making it optimal for thermally constrained 12V automotive and industrial switching where efficiency and board area are prioritized over ultra-high voltage or current headroom.

Availability

FCX1147ATA is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC outputs, DC-DC converter rectification, and thermal fan control requiring stable component supply and AEC-Q101-aligned sourcing.

Supply support for FCX1147ATA 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 semiconductor company specializing in discrete, analog, and mixed-signal devices, with design and manufacturing facilities certified to IATF 16949 and ISO 9001 standards.

The FCX1147ATA belongs to Diodes' FCX series of low-saturation PNP transistors engineered specifically for high-efficiency, high-reliability switching in automotive and industrial power management systems.

FAQ

What is the maximum allowable base current for FCX1147ATA?

The absolute maximum base current is -500 mA, as specified in the Absolute Maximum Ratings table. Exceeding this risks permanent damage to the base-emitter junction. For reliable operation at -3A collector current, the recommended base drive is -30 mA, yielding h_FE ≥ 90 and ensuring saturation without over-stressing the base region.

Does FCX1147ATA require a heatsink in standard SOT89 mounting?

No external heatsink is required if mounted on ≥40 mm × 40 mm of 1 oz copper, where it achieves 2 W power dissipation. On smaller pads (e.g., 15 mm × 15 mm), derating applies: max 1 W at +25°C ambient, decreasing linearly to zero at +150°C case temperature per the published derating curve.

Is FCX1147ATA qualified to AEC-Q101?

Yes - Diodes Incorporated states that FCX1147ATA is designed for automotive applications requiring AEC-Q101 qualification, PPAP capability, and manufacturing in IATF 16949-certified facilities. Full qualification test reports are available upon request through authorized Diodes representatives.

Can FCX1147ATA be used in linear regulator applications?

Yes - its V_BE(sat) = -820 mV (typ) and h_FE stability across -0.5A to -3A support use as a pass transistor in adjustable linear regulators. However, thermal design must account for V_CE × I_C power dissipation; operation above 1 W requires careful PCB copper planning per the thermal characteristics notes.

FCX1147ATA Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: TO-243AA

Packaging:: Tape & Reel (TR)

Product Status:: Discontinued at Digi-Key

Transistor Type:: PNP

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

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

Vce Saturation (Max) @ Ib, Ic:: 400mV @ 50mA, 5A

Current - Collector Cutoff (Max):: 10nA

DC Current Gain (hFE) (Min) @ Ic, Vce:: 250 @ 500mA, 2V

Power - Max:: 2 W

Frequency - Transition:: 115MHz

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-89-3

FCX1147ATA FAQ

1.How can I place an order for FCX1147ATA through Aetrix?

Please submit a Request for Quotation (RFQ) for FCX1147ATA 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 FCX1147ATA reliable?

The price and inventory of FCX1147ATA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FCX1147ATA is usually 5 days.

3.What payment methods are accepted for FCX1147ATA?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FCX1147ATA transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for FCX1147ATA?

FCX1147ATA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your FCX1147ATA 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 FCX1147ATA?

For technical support, including FCX1147ATA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FCX1147ATA requirements.

6.How does Aetrix verify that FCX1147ATA is sourced from the original manufacturer or authorized distributors?

All FCX1147ATA 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 FCX1147ATA meets industry standards.

7.What is the process for return or replacement of FCX1147ATA?

All FCX1147ATA units undergo pre-shipment inspection (PSI). If there is an issue with FCX1147ATA, 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 FCX1147ATA part is unused and in its original packaging.

Return procedure for FCX1147ATA:

1.Submit a request within 90 days.

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

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