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

STMicroelectronics STD13003T4

Name: STD13003T4
Brand: STMicroelectronics
SKU: STD13003T4
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STD13003T4

Manufacturer:: STMicroelectronics

Category:: Single Bipolar Transistors

Package:: TO-252-3, DPAK (2 Leads + Tab), SC-63

Datasheet:: STD13003T4.pdf

Description:: TRANS NPN 400V 1.5A DPAK

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Product details

Overview

STD13003T4 from STMicroelectronics is a high-voltage fast-switching NPN power transistor in DPAK (TO-252) surface-mount package, rated for 700 V V_CES, 1.5 A I_C, and 20 W P_tot at T_c = 25 °C, optimized for electronic ballasts and low-cost SMPS.

For engineers reviewing the STD13003T4 datasheet, STD13003T4 pinout, STD13003T4 application, or STD13003T4 equivalent, key selection criteria include V_CES = 700 V, t_r/t_f = 1/0.7 µs (resistive), R_thj-case = 6.25 °C/W, and Group A/B h_FE pre-selection for lighting and SMPS switching reliability.

Technical Context

This device uses high-voltage Multi Epitaxial Planar technology with Cellular Emitter structure and planar edge termination to achieve high switching speed while preserving wide RBSOA. It supports both resistive (t_r = 1 µs, t_f = 0.7 µs) and inductive (t_s = 0.8 µs) load switching at V_CC = 125 V.

The transistor is pre-selected into Group A (h_FE = 8–35) or Group B (h_FE = 5–25) per production lot, with guaranteed minimum V_CEO(sus) = 400 V under inductive clamp conditions and V_CE(sat) ≤ 1 V at I_C = 1 A / I_B = 0.25 A.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CES	700 V - Enables direct use in 230 VAC mains-fed ballasts and SMPS without voltage derating.
I_C	1.5 A continuous - Supports output stages up to ~100 W in compact lighting and adapter designs.
t_r/t_f	1 µs / 0.7 µs (resistive) - Reduces switching losses in 20–60 kHz ballast and SMPS topologies.
R_thj-case	6.25 °C/W - Allows 20 W dissipation with modest heatsinking on PCB copper pour.
V_CE(sat)	1 V @ I_C = 1 A, I_B = 0.25 A - Limits conduction loss to ≤1 W at rated current.
h_FE Groups	Group A: 8–35, Group B: 5–25 - Ensures consistent base drive design across production lots.

Pinout & Package

DPAK (TO-252) surface-mount package with 3-terminal configuration: emitter-tab (pin 1), collector (pin 2), base (pin 3); tab is electrically connected to emitter and serves as thermal path.

Pin/Terminal	Circuit Role	Design Meaning
Pin 1 (Emitter Tab)	Emitter terminal + thermal interface	Electrically tied to emitter; requires soldered copper area ≥ 200 mm² for R_thj-amb ≤ 100 °C/W.
Pin 2 (Center Lead)	Collector	Main high-voltage power path; connects to drain-side of half-bridge or flyback primary.
Pin 3 (Left Lead)	Base	Low-impedance control input; requires 0.25 A peak drive for full saturation at 1 A I_C.

Key Features

Feature	Design Value
Cellular Emitter + Planar Edge Termination	Enables simultaneous high V_CES (700 V) and fast t_f (0.7 µs) without SOA trade-off.
Low Lot-to-Lot Dynamic Spread	Guarantees consistent t_r, t_f, and V_CE(sat) across manufacturing batches for production stability.
Pre-Selected h_FE Groups	Eliminates need for binning or base resistor re-tuning when migrating between production lots.
Surface-Mount DPAK in Tape & Reel	Enables automated pick-and-place assembly for high-volume fluorescent ballast and adapter manufacturing.

Applications

Fluorescent Lamp Electronic Ballast

Offline Flyback SMPS

Use Scenario: High-frequency (20–60 kHz) resonant inverter driving 36–40 W T8/T12 lamps with instant start.

IC Role / Device Role / Timing Role: Main switch in half-bridge topology; handles 700 V blocking and rapid turn-on/off during lamp ignition and regulation.

Use Value: V_CES = 700 V withstands lamp open-circuit transients; t_f = 0.7 µs minimizes switching loss during frequent zero-crossing commutation.

Use Scenario: 25–65 W AC/DC adapter with universal input (85–265 VAC) and regulated 12 V/2 A output.

IC Role / Device Role / Timing Role: Primary-side power switch in discontinuous conduction mode (DCM) flyback converter.

Use Value: V_CEO(sus) = 400 V ensures safe operation under reflected output voltage + leakage spike; R_thj-case = 6.25 °C/W enables thermally robust layout without external heatsink.

Compact CFL Driver

LED Driver with Boost PFC Stage

Use Scenario: Integrated 11–23 W compact fluorescent lamp (CFL) with integrated ballast on single PCB.

IC Role / Device Role / Timing Role: Self-oscillating switch in Royer or modified ZVS topology; driven by transformer feedback.

Use Value: Low V_CE(sat) (≤1 V) reduces conduction loss in space-constrained thermal environment; Group A h_FE ensures reliable startup across temperature (-25 to +85 °C).

Use Scenario: 30 W LED driver with active boost PFC front-end and flyback DC/DC stage.

IC Role / Device Role / Timing Role: PFC switch handling 400 V DC bus; operates at 65–100 kHz with duty cycle modulation.

Use Value: Wide RBSOA supports high peak currents during line-voltage zero crossings; t_s = 0.8 µs (inductive) maintains timing margin in critical conduction mode (CRM).

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STN13003D	DPAK package, same V_CES/I_C, but h_FE not pre-grouped; t_r/t_f slightly slower (1.5/1.0 µs).	Lacks guaranteed h_FE consistency; less suitable for high-volume ballast where base drive must be fixed.	Acceptable for low-volume or prototype SMPS where tuning is feasible.
BUJ302A	TO-220 package, V_CES = 600 V, higher P_tot (30 W), but slower t_f (2.5 µs) and no tape-and-reel option.	Requires through-hole assembly and larger heatsink; unsuitable for space-constrained CFL modules.	Preferred only where higher power dissipation or legacy through-hole layout mandates TO-220.

Compared with STN13003D and BUJ302A, STD13003T4 uniquely combines tape-and-reel DPAK packaging, pre-selected h_FE groups, and sub-microsecond fall time-making it optimal for automated, high-yield production of compact 20–60 kHz lighting and adapter systems.

Availability

STD13003T4 is available at Aetrix Electronics and suitable for electronic ballasts, offline flyback SMPS, compact CFL drivers, and LED drivers with boost PFC stages requiring stable component supply and consistent dynamic performance across production lots.

Supply support for STD13003T4 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, delivering analog, power, MCU, and sensor solutions for industrial, automotive, and consumer markets.

The STD13003 belongs to ST's high-voltage bipolar power transistor family, engineered specifically for cost-sensitive, high-frequency lighting and power conversion applications demanding reliability, manufacturability, and thermal efficiency.

FAQ

What is the difference between STD13003T4 and STD13003-1?

STD13003T4 is the DPAK (TO-252) surface-mount version supplied in tape-and-reel, while STD13003-1 is the IPAK (TO-251) through-hole variant supplied in tubes. Both share identical electrical specs, but differ in mounting method, thermal interface, and packaging format for assembly line compatibility.

Is STD13003T4 RoHS compliant and halogen-free?

Yes, STD13003T4 conforms to RoHS Directive 2011/65/EU and is halogen-free per STMicroelectronics' specification document "ECOPACK®" (document number CD001674). The device carries the "E" suffix in its full ordering code (STD13003T4E) to denote compliance.

Can STD13003T4 replace BU2508DX in a 36 W electronic ballast?

No-BU2508DX has V_CES = 1500 V and I_C = 8 A, targeting high-power HID lamps. STD13003T4 (V_CES = 700 V, I_C = 1.5 A) is rated for 36–40 W fluorescent ballasts only; substituting it risks avalanche failure under lamp open-circuit transients exceeding 700 V.

What is the recommended PCB layout for thermal management of STD13003T4?

Use ≥ 200 mm² of 2-oz copper connected directly to the emitter tab (Pin 1), with ≥ 4 thermal vias (0.3 mm diameter, spaced ≤ 2 mm apart) to inner ground plane. Keep base and collector traces short and wide; avoid routing high-dv/dt nodes near base to prevent false triggering.

STD13003T4 Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: TO-252-3, DPAK (2 Leads + Tab), SC-63

Packaging:: Tape & Reel (TR)

Product Status:: Active

Transistor Type:: NPN

Current - Collector (Ic) (Max):: 1.5 A

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

Vce Saturation (Max) @ Ib, Ic:: 3V @ 500mA, 1.5A

Current - Collector Cutoff (Max):: -

DC Current Gain (hFE) (Min) @ Ic, Vce:: 5 @ 1A, 2V

Power - Max:: 20 W

Frequency - Transition:: -

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: DPAK

STD13003T4 FAQ

1.How can I place an order for STD13003T4 through Aetrix?

Please submit a Request for Quotation (RFQ) for STD13003T4 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 STD13003T4 reliable?

The price and inventory of STD13003T4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STD13003T4 is usually 5 days.

3.What payment methods are accepted for STD13003T4?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STD13003T4 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STD13003T4?

STD13003T4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STD13003T4 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 STD13003T4?

For technical support, including STD13003T4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STD13003T4 requirements.

6.How does Aetrix verify that STD13003T4 is sourced from the original manufacturer or authorized distributors?

All STD13003T4 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 STD13003T4 meets industry standards.

7.What is the process for return or replacement of STD13003T4?

All STD13003T4 units undergo pre-shipment inspection (PSI). If there is an issue with STD13003T4, 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 STD13003T4 part is unused and in its original packaging.

Return procedure for STD13003T4:

1.Submit a request within 90 days.

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

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