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

STMicroelectronics STT13005FP

Name: STT13005FP
Brand: STMicroelectronics
SKU: STT13005FP
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STT13005FP

Manufacturer:: STMicroelectronics

Category:: Single Bipolar Transistors

Package:: TO-225AA, TO-126-3

Datasheet:: STT13005FP.pdf

Description:: TRANS NPN 400V 2A SOT-32FP

Quantity:: RFQ Add To RFQ list

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Inventory:2,420

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Product details

Overview

STT13005FP from STMicroelectronics is a high-voltage fast-switching NPN power transistor in SOT-32FP package, rated for V_CEO = 400 V, I_C = 2 A, P_tot = 30 W at T_c = 25 °C, with t_r/t_f = 0.4/0.25 µs (resistive load) and optimized for electronic ballasts and low-power flyback converters.

For engineers reviewing the STT13005FP datasheet, STT13005FP pinout, STT13005FP application, or STT13005FP equivalent, key selection criteria include its 400 V sustaining voltage under I_C = 10 mA, 0.5 V V_CE(sat) at I_C = 0.5 A / I_B = 125 mA, cellular emitter structure for RBSOA robustness, and SOT-32FP thermal resistance of 4.2 °C/W.

Technical Context

This device employs high-voltage multi-epitaxial planar technology to achieve fast switching while maintaining wide reverse-biased safe operating area (RBSOA). Its planar edge termination and cellular emitter design jointly enable stable operation at V_CE = 400 V with I_C up to 2 A DC and 4 A peak.

The transistor supports both resistive and inductive load switching: t_s/t_f = 3.2/0.7 µs (resistive), and t_s/t_f = 0.8/0.16 µs (inductive, L = 50 mH, V_Clamp = 300 V), confirming suitability for self-oscillating and controlled-mode SMPS topologies.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	400 V - Sustaining voltage with I_B = 0, defines maximum off-state blocking capability in flyback/forward converters
I_C	2 A - Continuous collector current rating, sets max DC output power handling in lighting ballast drivers
V_CE(sat)	0.5 V @ I_C = 0.5 A / I_B = 125 mA - Low saturation voltage minimizes conduction loss and heatsink requirements
t_r/t_f	0.4 / 0.25 µs - Fast resistive-load switching enables >100 kHz operation in compact fluorescent lamp (CFL) ballasts
R_thJC	4.2 °C/W - Junction-to-case thermal resistance enables 30 W dissipation with modest heatsinking at T_c = 25 °C
h_FE	10–50 @ I_C = 0.5 A / V_CE = 5 V - Moderate DC gain supports simple base-drive design without excessive current sourcing

Pinout & Package

SOT-32FP is a through-hole power package with integrated heat sink tab (pin 3), featuring 3 terminals: emitter (pin 1), base (pin 2), collector (pin 3). The case serves as the collector terminal and primary thermal path.

Pin/Terminal	Circuit Role	Design Meaning
1	Emitter	Low-impedance return path for collector current; referenced to ground in common-emitter switch configurations
2	Base	Current-controlled input node; requires ~125 mA drive for full saturation at I_C = 0.5 A
3	Collector / Case	Main power terminal and thermal interface; electrically connected to heatsink; must be isolated from other potentials unless referenced to system ground

Key Features

Feature	Design Value
Cellular emitter structure	Enables uniform current distribution and improved ruggedness during inductive turn-off stress
Planar edge termination	Supports stable 400 V blocking without premature edge breakdown, critical for long-life lighting applications
High-speed switching (t_r/t_f < 1 µs)	Reduces switching losses in 20–100 kHz ballast and SMPS designs, enabling smaller magnetics and EMI filters
Wide RBSOA	Allows reliable operation under inductive load conditions with V_CE up to 300 V and I_C up to 1 A during turn-off

Applications

Compact Fluorescent Lamp (CFL) Ballast

Flyback Converter (Low-Power SMPS)

Use Scenario: High-frequency resonant driver for 11–42 W CFL tubes in residential and commercial lighting fixtures.

IC Role / Device Role / Timing Role: Main switching transistor in self-oscillating or IC-controlled half-bridge topology; handles 40–70 kHz switching with 400 V blocking.

Use Value: Cellular emitter and planar termination ensure consistent lumen output over 10,000-hour lifetime despite thermal cycling and line-voltage transients.

Use Scenario: Primary-side switch in universal-input (85–265 VAC), 5–25 W offline flyback power supplies for appliances and IoT sensors.

IC Role / Device Role / Timing Role: Power switch controlling energy transfer to secondary winding; operates at 60–100 kHz with V_CE spikes clamped to ≤300 V.

Use Value: 0.8 µs inductive storage time and 0.16 µs fall time minimize dead-time losses and improve efficiency above 80% at light loads.

Forward Converter (Auxiliary Supply)

LED Driver (Non-Isolated Buck)

Use Scenario: Main switch in 12 V/1 A auxiliary forward converter supplying control circuitry in industrial PLC power modules.

IC Role / Device Role / Timing Role: Synchronously gated NPN switch with fixed 50% duty cycle; sustains 400 V during reset phase with minimal tail current.

Use Value: 4.2 °C/W R_thJC allows direct mounting to chassis without additional heatsink, reducing BOM cost and footprint.

Use Scenario: High-side switch in non-isolated buck-derived LED driver for streetlight segments (24–48 V input, 350 mA constant current).

IC Role / Device Role / Timing Role: Linear-regulated or PWM-controlled pass element; leverages 2 A continuous rating for 350 mA LED strings with margin.

Use Value: V_BE(sat) = 1.0 V at I_C = 0.5 A ensures predictable base drive and stable current regulation across temperature.

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
STT13003FP	V_CEO = 400 V, I_C = 1.5 A, t_r/t_f = 0.5/0.3 µs, R_thJC = 5.0 °C/W	Lower current and thermal performance; suitable only for ≤15 W ballasts or <12 W flybacks	Select when lower power density and reduced heatsink requirement outweigh need for headroom
BU2508AX	V_CEO = 1500 V, I_C = 8 A, t_r/t_f = 0.6/0.4 µs, TO-220FP package	Higher voltage/current but slower switching and larger footprint; designed for TV horizontal deflection	Choose only if 700 V V_CES and 8 A I_CM are mandatory, accepting higher cost and layout complexity

Compared with STT13003FP and BU2508AX, STT13005FP delivers optimal balance of 400 V/2 A rating, sub-microsecond switching, and SOT-32FP thermal efficiency-making it uniquely suited for cost-sensitive, space-constrained 20–25 W lighting and SMPS designs where reliability and manufacturability are prioritized.

Availability

STT13005FP is available at Aetrix Electronics and suitable for electronic ballasts, low-power flyback converters, and forward converter auxiliary supplies requiring stable component supply and long-term production continuity.

Supply support for STT13005FP 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.

The STT1300xFP series belongs to ST's high-voltage bipolar power transistor product line, engineered specifically for lighting ballasts and low-cost switch-mode power supplies demanding robustness, speed, and thermal efficiency in compact packages.

FAQ

What is the maximum recommended case temperature for continuous operation?

The STT13005FP has a maximum junction temperature of 150 °C and a thermal resistance R_thJC of 4.2 °C/W. For continuous 30 W dissipation, the case temperature must not exceed 25 °C. At 75% derated power (22.5 W), the allowable case temperature rises to 53.5 °C per the derating curve in Figure 3 of the datasheet.

Can STT13005FP replace STT13004FP in an existing design?

Yes, with verification: STT13005FP shares identical SOT-32FP package, pinout, and V_CEO = 400 V rating, but offers higher I_C (2 A vs. 1.5 A) and lower V_CE(sat) (0.5 V vs. 0.6 V). Thermal and drive circuit margins should be rechecked, especially base current capability and heatsink adequacy for the increased current capability.

Does this transistor require a snubber network in flyback applications?

A snubber is recommended due to V_CEO = 400 V and typical flyback clamp voltages near 300 V. The device's RBSOA and inductive t_s/t_f specs assume clamped operation (V_Clamp = 300 V); unclamped inductive switching risks secondary breakdown, especially at elevated temperatures or high duty cycles.

Is STT13005FP compliant with RoHS and REACH regulations?

Yes - ST confirms ECOPACK® compliance for STT13005FP per the datasheet's Package Mechanical Data section. It meets RoHS Directive 2011/65/EU and REACH SVHC thresholds, with lead-free terminations and halogen-free molding compound, as verified in ST's published ECOPACK® grade documentation.

STT13005FP Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: TO-225AA, TO-126-3

Packaging:: Bag

Product Status:: Obsolete

Transistor Type:: NPN

Current - Collector (Ic) (Max):: 2 A

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

Vce Saturation (Max) @ Ib, Ic:: 1.5V @ 400mA, 1.6A

Current - Collector Cutoff (Max):: 250µA

DC Current Gain (hFE) (Min) @ Ic, Vce:: 10 @ 500mA, 5V

Power - Max:: 30 W

Frequency - Transition:: -

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: SOT-32FP

STT13005FP FAQ

1.How can I place an order for STT13005FP through Aetrix?

Please submit a Request for Quotation (RFQ) for STT13005FP 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 STT13005FP reliable?

The price and inventory of STT13005FP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STT13005FP is usually 5 days.

3.What payment methods are accepted for STT13005FP?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STT13005FP transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STT13005FP?

STT13005FP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STT13005FP 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 STT13005FP?

For technical support, including STT13005FP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STT13005FP requirements.

6.How does Aetrix verify that STT13005FP is sourced from the original manufacturer or authorized distributors?

All STT13005FP 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 STT13005FP meets industry standards.

7.What is the process for return or replacement of STT13005FP?

All STT13005FP units undergo pre-shipment inspection (PSI). If there is an issue with STT13005FP, 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 STT13005FP part is unused and in its original packaging.

Return procedure for STT13005FP:

1.Submit a request within 90 days.

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

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