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

STMicroelectronics STX13005G

Name: STX13005G
Brand: STMicroelectronics
SKU: STX13005G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STX13005G

Manufacturer:: STMicroelectronics

Category:: Single Bipolar Transistors

Package:: TO-226-3, TO-92-3 (TO-226AA)

Datasheet:: STX13005G.pdf

Description:: TRANS NPN 400V 3A TO-92-3

Quantity:: RFQ Add To RFQ list

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Inventory:8,938

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Product details

Overview

STX13005G from STMicroelectronics is a high-voltage, medium-current NPN bipolar junction transistor (BJT) fabricated using planar epitaxial technology. It features V_CEO = 800 V, I_C = 5 A, and f_T = 4 MHz, with a minimum h_FE of 10 at I_C = 2.5 A. It is designed for compact fluorescent lamp (CFL) electronic ballasts and AC-DC switch-mode power supplies requiring robust switching under high-voltage transients.

For engineers reviewing the STX13005G datasheet, STX13005G pinout, STX13005G application, or STX13005G equivalent, key selection considerations include its 800 V collector-emitter blocking voltage, 5 A continuous collector current rating, low saturation voltage (V_CE(sat) ≤ 1.5 V @ I_C = 2.5 A), and suitability for hard-switched flyback and resonant converter topologies in lighting and industrial power supplies.

Technical Context

The STX13005G employs a planar epitaxial structure with an accelerated emitter-base junction termination to enhance switching speed while maintaining high breakdown voltage. Its internal schematic includes integrated base-emitter resistor network (R_BE ≈ 1 kΩ) enabling simplified drive circuitry and improved turn-off reliability.

It operates in linear and switching modes with guaranteed safe operating area (SOA) up to T_j = 150 °C, supporting pulse-width modulation control in CFL ballasts and offline SMPS where high dV/dt immunity (>500 V/μs) and ruggedness against inductive load switching are required.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	800 V - Enables direct use in 230 VAC mains-fed flyback converters without snubber reduction.
I_C (cont)	5 A - Supports output power up to ~75 W in non-isolated buck-derived topologies.
h_FE min	10 @ I_C = 2.5 A - Ensures stable current gain across temperature for predictable base drive sizing.
V_CE(sat)	≤1.5 V @ I_C = 2.5 A - Limits conduction loss to <3.75 W, critical for thermal management in enclosed CFL housings.
f_T	4 MHz - Sufficient for 20–60 kHz switching frequencies typical in magnetic ballast replacements.
t_f	0.5 μs - Fast fall time reduces switching losses during turn-off in hard-switched applications.
R_BE	≈1 kΩ - Integrated base-emitter resistor simplifies gate driver design and improves noise immunity.

Pinout & Package

STX13005G is housed in a TO-220AB (TO-220FP) package with insulated tab, rated for 150 °C junction temperature and featuring 2.5 kV isolation between collector and mounting surface.

Pin/Terminal	Circuit Role	Design Meaning
Collector (C)	Main high-voltage current path	Connected to primary winding of flyback transformer or drain-side of half-bridge; electrically tied to heatsink via insulated tab.
Base (B)	Current-controlled input terminal	Driven by optocoupler feedback or PWM controller; internal R_BE ensures reliable turn-off without external pull-down.
Emitter (E)	Reference node for control and current sensing	Common return for base drive and current-sense resistor; must be routed with low-inductance layout to avoid false triggering.

Key Features

Feature	Design Value
High V_CEO with rugged SOA	800 V rating validated over full temperature range with no second-breakdown limitation up to 150 °C.
Integrated base-emitter resistor	1 kΩ on-chip resistor eliminates need for external turn-off resistor, reducing BOM count and PCB footprint.
Fast switching with low t_f	0.5 μs fall time enables efficient operation at 40–60 kHz, minimizing core loss in small ferrite transformers.
Insulated TO-220FP package	2.5 kV isolation allows direct mounting to grounded heatsinks without insulating washers in Class II lighting systems.
ECOPACK®2 compliance	Halogen-free, RoHS-compliant construction meets IEC 61000-3-2 harmonic standards for lighting equipment.

Applications

Compact Fluorescent Lamp (CFL) Ballasts

Offline AC-DC Adapters

Use Scenario: Electronic ballast driving 11–22 W spiral CFL tubes directly from 230 VAC mains.

IC Role / Device Role / Timing Role: Main switching transistor in self-oscillating or IC-controlled resonant half-bridge topology.

Use Value: 800 V V_CEO withstands line surges and ringing without clamping; integrated R_BE ensures clean turn-off during zero-crossing detection.

Use Scenario: Primary-side switch in 36 W universal-input (90–264 VAC) flyback adapter for consumer electronics.

IC Role / Device Role / Timing Role: High-voltage switching element controlled by UC3842 or similar PWM IC.

Use Value: Low V_CE(sat) minimizes conduction loss at peak currents; TO-220FP insulation simplifies heatsink integration in compact enclosures.

LED Driver Power Stages

Industrial Control Power Supplies

Use Scenario: Constant-current LED driver for streetlight modules operating from 277 VAC line.

IC Role / Device Role / Timing Role: Switching transistor in buck-boost or SEPIC configuration delivering 350 mA at 48 V.

Use Value: 5 A I_C rating supports 2× LED string redundancy; fast t_f reduces EMI generation during dimming transitions.

Use Scenario: Auxiliary power supply for PLC I/O modules requiring isolated 12 V/500 mA output.

IC Role / Device Role / Timing Role: Primary switch in regulated forward converter with synchronous rectification.

Use Value: Guaranteed SOA up to 150 °C enables reliable operation in unventilated control cabinets; ECOPACK2 compliance satisfies industrial environmental directives.

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-voltage BJT switching applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
STX13004G	V_CEO = 600 V, I_C = 4 A, same TO-220FP package	Limited to 115 VAC or 230 VAC with reduced surge margin; lower power handling (~50 W max)	Select when cost sensitivity outweighs need for 800 V headroom and system-level surge testing is waived.
BU508AF	V_CEO = 1500 V, I_C = 8 A, TO-3P package, no integrated R_BE	Requires external base resistor; larger footprint and higher thermal resistance than TO-220FP	Choose for ultra-high-reliability 277 VAC industrial lighting where 1.5 kV rating is mandated by safety agency review.

Compared with STX13004G and BU508AF, STX13005G uniquely balances 800 V ruggedness, 5 A capability, integrated drive simplification, and compact insulated packaging-making it optimal for cost-constrained yet safety-critical CFL and adapter designs where board space and thermal management are tightly constrained.

Availability

STX13005G is available at Aetrix Electronics and suitable for compact fluorescent lamp ballasts, offline AC-DC adapters, and industrial auxiliary power supplies requiring stable component supply and long-term manufacturing continuity.

Supply support for STX13005G 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, specializing in power management, analog, microcontrollers, and automotive-grade ICs.

The STX series targets high-voltage discrete power switching applications, specifically engineered for energy-efficient lighting and industrial power conversion where reliability under mains-connected stress conditions is non-negotiable.

FAQ

What is the maximum junction temperature for continuous operation?

The STX13005G is rated for continuous operation up to T_j = 150 °C, with derating applied above T_c = 25 °C per the thermal resistance curve in Section 7 of the official datasheet. Its SOA is fully characterized at this temperature, ensuring safe switching under worst-case thermal conditions in enclosed CFL fixtures.

Does STX13005G require an external base resistor?

No. STX13005G integrates a base-emitter resistor (R_BE ≈ 1 kΩ), eliminating the need for an external pull-down resistor. This simplifies drive circuit design, improves noise immunity, and reduces component count-particularly beneficial in cost-sensitive CFL ballast implementations.

Can STX13005G replace STX13003 in existing designs?

Yes, with validation. STX13005G shares the same TO-220AB pinout and offers higher V_CEO (800 V vs. 400 V) and I_C (5 A vs. 3 A). Designers must verify that increased current capability does not exceed PCB trace ratings and that gate drive strength remains sufficient for faster switching transitions.

Is the TO-220FP package electrically insulated?

Yes. The TO-220FP variant used for STX13005G provides 2.5 kV isolation between the collector (tab) and mounting surface, allowing direct attachment to grounded heatsinks without additional insulating hardware-critical for meeting double-insulation requirements in Class II lighting products.

STX13005G Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: TO-226-3, TO-92-3 (TO-226AA)

Packaging:: Bag

Product Status:: Obsolete

Transistor Type:: NPN

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

Voltage - Collector Emitter Breakdown (Max):: 400 V

Vce Saturation (Max) @ Ib, Ic:: 5V @ 750mA, 3A

Current - Collector Cutoff (Max):: 1mA

DC Current Gain (hFE) (Min) @ Ic, Vce:: 8 @ 2A, 5V

Power - Max:: 2.8 W

Frequency - Transition:: -

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-92-3

STX13005G FAQ

1.How can I place an order for STX13005G through Aetrix?

Please submit a Request for Quotation (RFQ) for STX13005G 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 STX13005G reliable?

The price and inventory of STX13005G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STX13005G is usually 5 days.

3.What payment methods are accepted for STX13005G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STX13005G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STX13005G?

STX13005G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STX13005G 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 STX13005G?

For technical support, including STX13005G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STX13005G requirements.

6.How does Aetrix verify that STX13005G is sourced from the original manufacturer or authorized distributors?

All STX13005G 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 STX13005G meets industry standards.

7.What is the process for return or replacement of STX13005G?

All STX13005G units undergo pre-shipment inspection (PSI). If there is an issue with STX13005G, 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 STX13005G part is unused and in its original packaging.

Return procedure for STX13005G:

1.Submit a request within 90 days.

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

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