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

STMicroelectronics STH13009

Name: STH13009
Brand: STMicroelectronics
SKU: STH13009
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STH13009

Manufacturer:: STMicroelectronics

Category:: Single Bipolar Transistors

Package:: TO-220-3

Datasheet:: STH13009.pdf

Description:: TRANS NPN 400V 12A TO-220

Quantity:: RFQ Add To RFQ list

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Product details

Overview

STH13009 from STMicroelectronics is a high-voltage fast-switching NPN power transistor fabricated in Multi Epitaxial Planar technology with Hollow Emitter structure, rated for V_CEO = 400 V, I_C = 12 A, P_TOT = 100 W, and t_s/t_f = 1.7–2.5 µs / 100–140 ns, used in offline SMPS primary-side switching stages.

For engineers reviewing the STH13009 datasheet, STH13009 pinout, STH13009 application, or STH13009 equivalent, key selection criteria include V_CEV = 700 V capability, low dynamic parameter spread, R_thj-case = 1.25 °C/W thermal resistance, and verified inductive-load switching performance at 250 V/5 A.

Technical Context

This device implements a high-voltage NPN bipolar junction transistor architecture optimized for hard-switched flyback and forward converter topologies. Its Hollow Emitter design reduces minority carrier storage time, enabling fast turn-off (t_s ≤ 2.5 µs) while sustaining V_CEV = 700 V under reverse-biased conditions.

The TO-220 package provides direct case-to-heatsink thermal conduction with R_thj-case = 1.25 °C/W max, supporting continuous operation up to T_J = 150 °C. Electrical behavior is characterized at T_case = 25 °C with pulsed test conditions per JEDEC JESD24-A.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	400 V - Sustains full mains-referenced DC bus voltage in 230 VAC SMPS designs without derating.
I_C	12 A - Supports output power up to ~300 W in single-transistor forward converters with adequate heatsinking.
P_TOT	100 W - Enables high-duty-cycle operation when mounted on ≥100 cm² aluminum heatsink at 25 °C ambient.
t_s/t_f	1.7–2.5 µs / 100–140 ns - Meets <5 µs total switching time requirement for 100 kHz SMPS designs with low switching loss.
R_thj-case	1.25 °C/W max - Allows junction temperature rise of ≤125 °C above case at full 100 W dissipation, critical for thermal margin.
h_FE	11–30 - Provides stable base drive requirements across operating range; enables fixed-gain driver design with ±20% current gain tolerance.

Pinout & Package

Package: TO-220 (3-pin, straight lead, insulated tab). Case serves as collector terminal; leads are emitter (pin 1), base (pin 2), collector (pin 3).

Pin/Terminal	Circuit Role	Design Meaning
Pin 1	Emitter	Main current return path; low-inductance connection required to minimize switching overshoot in high-dI/dt applications.
Pin 2	Base	Control input requiring 1–2.4 A peak drive for full saturation at I_C = 12 A; sensitive to PCB trace inductance.
Pin 3 / Case	Collector	High-voltage power node tied directly to heatsink; requires insulating washer and creepage clearance ≥4 mm for 400 V isolation.

Key Features

Feature	Design Value
Hollow Emitter structure	Reduces stored charge by >30% vs. planar BJT, cutting storage time to ≤2.5 µs for improved hard-switching efficiency.
Multi Epitaxial Planar process	Enables tight V_CEO distribution (±5 V) and h_FE spread (11–30), reducing need for binning in production.
V_CEV = 700 V rating	Supports 380 VDC bus with 80% margin against line surges and transformer leakage spikes in universal-input SMPS.
ECOPACK® lead-free packaging	Meets RoHS Directive 2011/65/EU with SnAgCu solder finish; compatible with standard reflow profiles (peak 260 °C).

Applications

Offline Flyback SMPS

Forward Converter Primary Switch

Use Scenario: 85–265 VAC input, 12–24 VDC output, 65–100 kHz switching in consumer AC/DC adapters.

IC Role / Device Role / Timing Role: Main power switch conducting during primary on-time; handles 400 V blocking and 12 A peak current pulses.

Use Value: Low t_s/t_f minimizes overlap loss; V_CEV = 700 V ensures robustness against reflected voltage spikes from transformer leakage inductance.

Use Scenario: Telecom rectifier module with 36–72 VDC input, delivering 50–100 W at 12 V with synchronous rectification.

IC Role / Device Role / Timing Role: Single-ended primary switch in forward topology; clamped by RCD snubber during off-state.

Use Value: Tight h_FE spread allows consistent base drive design across production lots; R_thj-case = 1.25 °C/W supports compact heatsink integration.

DC-DC Boost Pre-regulator

Industrial AC Motor Drive Inverter Stage

Use Scenario: Three-phase PFC front-end boosting 400 VAC line to 750 VDC bus for servo drives.

IC Role / Device Role / Timing Role: High-side boost switch operating at 20–50 kHz with 12 A average current.

Use Value: V_CEO = 400 V meets minimum blocking requirement; low dynamic parameter spread ensures predictable gate driver sizing.

Use Scenario: 3 kW HVAC inverter using discrete BJT-based half-bridge modules for fan/pump control.

IC Role / Device Role / Timing Role: High-voltage switching element in phase-leg configuration; driven by optocoupled isolated gate drivers.

Use Value: TO-220 mechanical robustness and 150 °C T_Jmax support continuous operation in sealed enclosures with limited airflow.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BU508A	V_CEO = 1000 V, I_C = 15 A, t_s = 4.5 µs - higher voltage rating but slower switching.	Better surge immunity in unregulated industrial supplies; unsuitable for >60 kHz designs due to longer storage time.	Select when V_CEV margin >1000 V is mandatory and switching frequency ≤40 kHz.
MJE13009	Same pinout/package; V_CEO = 400 V, I_C = 12 A, but t_s = 3.5 µs - wider h_FE spread (8–40) and no ECOPACK compliance.	Acceptable in cost-sensitive legacy designs where RoHS is not required and thermal margin is generous.	Choose only for backward-compatible replacements where lead-free compliance and tight parameter distribution are not critical.

Compared with BU508A and MJE13009, STH13009 delivers superior switching speed (t_s ≤ 2.5 µs) and tighter parameter control, making it optimal for high-frequency, high-reliability SMPS where thermal management and EMI reduction are prioritized over absolute voltage headroom.

Availability

STH13009 is available at Aetrix Electronics and suitable for offline switch-mode power supplies, industrial DC-DC pre-regulators, and motor drive inverter stages requiring stable component supply and long-term manufacturability assurance.

Supply support for STH13009 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, designing and manufacturing analog, microcontroller, power, and sensor solutions for industrial, automotive, and consumer markets.

STH13009 belongs to ST's high-voltage bipolar power transistor product line, engineered specifically for energy-efficient, high-reliability switching applications in AC/DC and DC/DC conversion systems.

FAQ

Is STH13009 suitable for use in 100 kHz SMPS designs?

Yes. With measured storage time ≤2.5 µs and fall time ≤140 ns, STH13009 meets switching loss and EMI constraints typical of 100 kHz flyback and forward converters. Its low dynamic parameter spread ensures consistent timing behavior across temperature and unit-to-unit variation.

What is the recommended base drive configuration for full saturation at 12 A collector current?

Drive with I_B = 2.4 A peak (h_FE min = 11 at I_C = 12 A) using a low-impedance path (<1 Ω series resistance) and localized 100 nF ceramic decoupling at the base-emitter terminals to suppress ringing during fast transitions.

Does STH13009 require a heatsink in continuous 100 W operation?

Yes. At P_TOT = 100 W and R_thj-case = 1.25 °C/W, junction temperature rises 125 °C above case temperature. To maintain T_J ≤ 150 °C, case temperature must stay ≤25 °C - achievable only with a large, finned aluminum heatsink (≥300 cm²) and forced air cooling.

Can STH13009 replace MJE13009 in existing designs without layout changes?

Yes - identical TO-220 package, pinout, and voltage/current ratings allow drop-in replacement. However, verify base drive strength (STH13009 has tighter h_FE spread) and confirm ECOPACK® compatibility with your assembly process, as its lead-free finish requires higher reflow peak temperatures.

STH13009 Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: TO-220-3

Packaging:: Tube

Product Status:: Obsolete

Transistor Type:: NPN

Current - Collector (Ic) (Max):: 12 A

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

Vce Saturation (Max) @ Ib, Ic:: 2V @ 2.4A, 12A

Current - Collector Cutoff (Max):: -

DC Current Gain (hFE) (Min) @ Ic, Vce:: 18 @ 5A, 5V

Power - Max:: 100 W

Frequency - Transition:: -

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-220

STH13009 FAQ

1.How can I place an order for STH13009 through Aetrix?

Please submit a Request for Quotation (RFQ) for STH13009 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 STH13009 reliable?

The price and inventory of STH13009 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STH13009 is usually 5 days.

3.What payment methods are accepted for STH13009?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STH13009 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STH13009?

STH13009 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STH13009 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 STH13009?

For technical support, including STH13009 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STH13009 requirements.

6.How does Aetrix verify that STH13009 is sourced from the original manufacturer or authorized distributors?

All STH13009 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 STH13009 meets industry standards.

7.What is the process for return or replacement of STH13009?

All STH13009 units undergo pre-shipment inspection (PSI). If there is an issue with STH13009, 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 STH13009 part is unused and in its original packaging.

Return procedure for STH13009:

1.Submit a request within 90 days.

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

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