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

STMicroelectronics STT13005D

Name: STT13005D
Brand: STMicroelectronics
SKU: STT13005D
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STT13005D

Manufacturer:: STMicroelectronics

Category:: Single Bipolar Transistors

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

Datasheet:: STT13005D.pdf

Description:: TRANS NPN 400V 2A SOT-32-3

Quantity:: RFQ Add To RFQ list

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Inventory:4,563

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Product details

Overview

STT13005D from STMicroelectronics is a high-voltage fast-switching NPN power transistor with integrated antiparallel collector-emitter diode, 700 V V_CES, 2 A I_C, and 0.4 µs rise time, designed for electronic ballasts and low-power flyback/forward SMPS.

For engineers reviewing the STT13005D datasheet, STT13005D pinout, STT13005D application, or STT13005D equivalent, key selection criteria include V_CEO = 400 V, R_thJC = 2.8 °C/W, h_FE = 10–50 at I_C = 0.5–2 A, and integrated diode functionality in SOT-32 package.

Technical Context

This device uses high-voltage multi-epitaxial planar technology with cellular emitter structure and planar edge termination to simultaneously achieve high switching speed and wide RBSOA. It supports both resistive (t_r = 0.4 µs, t_f = 0.25 µs) and inductive (t_s = 0.8 µs, t_f = 0.16 µs) load switching.

The integrated antiparallel diode enables self-commutated operation in flyback topologies without external diode placement. V_CE(sat) ranges from 0.5 V (I_C = 0.5 A, I_B = 125 mA) to 1.5 V (I_C = 1.6 A, I_B = 0.4 A), supporting efficient medium-current switching at T_C = 25 °C.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CES	700 V - Enables operation in 230 VAC mains-fed ballasts with margin against voltage transients.
I_C	2 A continuous - Supports up to ~40 W output in single-transistor forward converters.
t_r / t_f	0.4 µs / 0.25 µs (resistive) - Reduces switching losses below 100 kHz operating range.
R_thJC	2.8 °C/W - Allows 45 W dissipation at T_C = 25 °C; requires heatsink for sustained >15 W operation.
h_FE	10–50 (I_C = 0.5–2 A, V_CE = 5 V) - Supports direct base drive with modest current gain stability across load range.
V_F (diode)	2.5 V @ I_F = 1 A - Integrated diode reduces BOM count but adds conduction loss vs. Schottky alternatives.

Pinout & Package

SOT-32 (TO-225AA) three-terminal plastic package with isolated mounting flange; pin 1 = emitter, pin 2 = base, pin 3 = collector. Case temperature measurement point defined at flange center.

Pin/Terminal	Circuit Role	Design Meaning
1 (Emitter)	Current return path and diode anode	Shared terminal for transistor emitter and integrated diode anode; connects to ground or low-side return in flyback.
2 (Base)	Control input for NPN switching	Receives current-limited drive (max I_B = 1 A); base resistor selection must ensure saturation at target I_C.
3 (Collector)	Main current output and diode cathode	Connects to primary winding and integrated diode cathode; handles full HV switching node voltage and current.

Key Features

Feature	Design Value
Integrated antiparallel diode	Eliminates need for external freewheeling diode in flyback snubberless designs, reducing PCB area and component count.
High V_CES (700 V)	Supports universal-input (90–264 VAC) fluorescent ballasts without derating or series stacking.
Fast switching (t_r = 0.4 µs)	Enables >60 kHz operation with minimal overlap loss, improving efficiency in compact lighting drivers.
Wide RBSOA with planar edge termination	Permits safe single-pulse operation at V_CE = 400 V and I_C = 2 A, critical for transient overload in lamp ignition.

Applications

Electronic Ballast

Flyback SMPS

Use Scenario: High-frequency AC lamp drive for T8/T5 fluorescent tubes with instant start and dimming capability.

IC Role / Device Role / Timing Role: Main switch controlling primary current and energy transfer; integrated diode provides freewheel path during off-time.

Use Value: Eliminates external diode, reduces EMI from parasitic loop, and simplifies gate-drive timing by removing separate diode recovery concerns.

Use Scenario: Isolated 12–24 V DC output supply from 230 VAC input in smart lighting control modules.

IC Role / Device Role / Timing Role: Primary-side power switch regulating energy storage in transformer primary; operates at fixed 65 kHz frequency.

Use Value: 0.4 µs rise time minimizes switching loss at 65 kHz, enabling >82% efficiency without active cooling in enclosed fixtures.

Forward Converter

Lamp Ignition Circuit

Use Scenario: Low-cost 15–30 W constant-current LED driver using single-transistor forward topology with reset winding.

IC Role / Device Role / Timing Role: Main switch conducting during duty cycle; reset winding returns core energy via integrated diode path.

Use Value: Integrated diode conducts reset current, avoiding need for separate reset diode and reducing layout complexity and leakage inductance.

Use Scenario: High-voltage pulse generation to initiate gas ionization in cold-cathode fluorescent lamps (CCFL).

IC Role / Device Role / Timing Role: Fast turn-off switch generating 1–2 kV spikes across resonant tank; relies on wide RBSOA for safe overvoltage handling.

Use Value: 400 V V_CEO(sus) and 150 °C T_J(max) allow reliable 10 ms ignition pulses without thermal runaway or secondary breakdown.

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
STN13005	V_CES = 700 V, same package, but no integrated diode; higher h_FE (min 15 at I_C = 0.5 A)	Requires external freewheeling diode; better suited for designs needing tighter gain control or lower V_CE(sat) at light loads.	Select when diode integration is unnecessary and base drive efficiency is prioritized over BOM count.
BU508A	V_CES = 1500 V, I_C = 8 A, TO-220 package; slower switching (t_r ≈ 1.2 µs), no integrated diode	Used in higher-power (>100 W) ballasts and industrial SMPS where voltage margin outweighs speed requirements.	Choose only if system demands >700 V blocking or >2 A average current; not drop-in due to larger footprint and thermal mass.

Compared with STN13005 and BU508A, STT13005D uniquely combines integrated diode functionality, 700 V rating, and sub-microsecond switching in SOT-32-making it optimal for space-constrained, cost-sensitive <40 W lighting and auxiliary power supplies where diode omission would increase layout risk and EMI.

Availability

STT13005D is available at Aetrix Electronics and suitable for electronic ballasts, flyback SMPS, forward converters, and lamp ignition circuits requiring stable component supply and long-term industrial availability.

Supply support for STT13005D 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 STT13005D belongs to ST's high-voltage bipolar power transistor family, engineered specifically for cost-effective, high-reliability lighting control and low-power offline SMPS where integrated diode functionality and fast switching reduce system-level complexity.

FAQ

What is the maximum safe operating voltage for STT13005D in continuous conduction mode?

The absolute maximum V_CEO is 400 V with I_B = 0, and V_CES is 700 V with V_BE = 0. For continuous conduction in flyback or forward topologies, design must stay within the SOA curve at T_C ≤ 100 °C and limit peak V_CE to ≤ 400 V under load transients to avoid secondary breakdown.

Does the integrated diode support reverse recovery in high-frequency operation?

No-the integrated diode is a standard PN junction with typical t_rr > 1 µs, unsuitable for high-frequency reverse recovery. Its function is freewheeling only during the transistor's off-time in inductive topologies; it is not rated for commutation or bidirectional switching.

Can STT13005D replace STN13005 without circuit modification?

No-while pin-compatible, STT13005D's integrated diode changes the internal connection between collector and emitter. Using it as a direct replacement for STN13005 may cause short-circuit if the external diode remains in place or alter flyback reset behavior due to parallel conduction paths.

What thermal interface material is recommended for SOT-32 mounting?

A thermally conductive insulating pad (e.g., 0.2 mm silicone-based film, 1.5 W/m·K) or electrically isolating thermal paste is recommended. Mounting torque must not exceed 0.5 N·m to avoid case cracking; flange-to-heatsink contact area should be ≥ 90% for R_thJC to remain near 2.8 °C/W.

STT13005D Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

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

Packaging:: Tube

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:: 45 W

Frequency - Transition:: -

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: SOT-32-3

STT13005D FAQ

1.How can I place an order for STT13005D through Aetrix?

Please submit a Request for Quotation (RFQ) for STT13005D 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 STT13005D reliable?

The price and inventory of STT13005D are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STT13005D is usually 5 days.

3.What payment methods are accepted for STT13005D?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STT13005D transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STT13005D?

STT13005D orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STT13005D 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 STT13005D?

For technical support, including STT13005D datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STT13005D requirements.

6.How does Aetrix verify that STT13005D is sourced from the original manufacturer or authorized distributors?

All STT13005D 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 STT13005D meets industry standards.

7.What is the process for return or replacement of STT13005D?

All STT13005D units undergo pre-shipment inspection (PSI). If there is an issue with STT13005D, 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 STT13005D part is unused and in its original packaging.

Return procedure for STT13005D:

1.Submit a request within 90 days.

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

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