Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

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

STMicroelectronics STT13005

Name: STT13005
Brand: STMicroelectronics
SKU: STT13005
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: STT13005

Manufacturer:: STMicroelectronics

Category:: Single Bipolar Transistors

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

Datasheet:: STT13005.pdf

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

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:8,243

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

STT13005 from STMicroelectronics is a high-voltage fast-switching NPN power transistor in SOT-32 package, rated for V_CEO = 400 V, I_C = 2 A, P_tot = 45 W at T_c = 25 °C, with t_r/t_f = 0.4/0.25 µs (resistive load) and R_thJC = 2.8 °C/W. It is engineered for electronic ballasts and low-power flyback/forward SMPS.

For engineers reviewing the STT13005 datasheet, STT13005 pinout, STT13005 application, or STT13005 equivalent, key selection criteria include its 400 V V_CEO, 2.8 °C/W thermal resistance, cellular emitter planar structure for wide RBSOA, and validated performance in fluorescent lighting ballasts and single-transistor SMPS topologies.

Technical Context

This device uses high-voltage multi-epitaxial planar technology to achieve fast switching while sustaining 400 V collector-emitter voltage under zero-base-current conditions. Its cellular emitter layout and planar edge termination jointly enable high-speed operation without compromising reverse-biased safe operating area (SOA).

The transistor delivers h_FE = 10–50 (I_C = 0.5–2 A, V_CE = 5 V), V_CE(sat) = 0.5–1.5 V across 0.5–1.6 A, and supports both resistive (t_s = 3.2 µs) and inductive (t_s = 0.8 µs) switching modes with defined clamp voltage (V_Clamp = 300 V) and base drive requirements (I_B = 0.2–0.4 A).

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	400 V - Maximum collector-emitter voltage with open base; defines upper limit for flyback reset and forward converter blocking capability
I_C	2 A continuous - Rated DC collector current at T_c = 25 °C; sets primary-side current handling in <15 W SMPS designs
P_tot	45 W at T_c = 25 °C - Total power dissipation limit; requires heatsinking for >10 W continuous conduction
R_thJC	2.8 °C/W - Junction-to-case thermal resistance; determines temperature rise per watt dissipated into heatsink
t_r/t_f	0.4/0.25 µs - Rise/fall times under resistive load (V_CC = 125 V, I_B = ±0.2 A); enables >100 kHz switching in ballast circuits
h_FE	10–50 - DC current gain range at I_C = 0.5–2 A; informs base drive sizing for saturation in linear or switching regions

Pinout & Package

SOT-32 (TO-225AA) is a 3-pin through-hole plastic package with metal tab for thermal conduction and mechanical mounting. Pin 1 = Emitter, Pin 2 = Base, Pin 3 = Collector (tab-connected). The metal tab is electrically connected to the collector terminal.

Pin/Terminal	Circuit Role	Design Meaning
1 (Emitter)	Current exit path from transistor	Low-impedance return node; referenced to ground in common-emitter configurations used in ballasts and SMPS
2 (Base)	Control input for minority-carrier injection	Requires ~0.2–0.4 A peak drive for full saturation; sensitive to ESD due to low V_EBO = 9 V
3 (Collector / Tab)	Main high-voltage current input and thermal interface	Electrically tied to metal tab; must be isolated from chassis unless circuit design permits direct connection

Key Features

Feature	Design Value
High-voltage capability	V_CEO = 400 V enables use in 230 VAC-fed electronic ballasts and universal-input flyback converters without snubber overhead
Cellular emitter + planar edge termination	Simultaneously extends reverse-biased SOA and reduces switching time dispersion across production lots
Low R_thJC = 2.8 °C/W	Allows 15–20 W continuous output in compact ballast PCBs using minimal copper pour or small heatsinks
Fast switching (t_r/t_f ≤ 0.7 µs)	Supports >100 kHz operation with reduced switching losses-critical for flicker-free fluorescent lamp control

Applications

Electronic Ballast Control

Flyback SMPS

Use Scenario: High-frequency AC drive for T8/T5 fluorescent lamps in commercial lighting fixtures.

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

Use Value: 400 V V_CEO withstands lamp ignition transients; fast t_r/t_f minimizes audible noise and improves lamp life.

Use Scenario: Primary-side switch in <15 W offline AC/DC adapters for consumer electronics.

IC Role / Device Role / Timing Role: Single-transistor energy-transfer switch in discontinuous conduction mode (DCM) flyback converter.

Use Value: Low V_CE(sat) (0.5 V @ 0.5 A) reduces conduction loss; wide RBSOA ensures reliability during output short-circuit events.

Forward Converter

Inductive Load Switching

Use Scenario: Regulated DC-DC conversion in industrial control power supplies (24 V output from 375 V bus).

IC Role / Device Role / Timing Role: Main switch in single-ended forward topology with reset winding and synchronous rectification.

Use Value: 2 A I_C rating supports up to 12 W output; t_s = 0.8 µs (inductive) enables clean turn-off with controlled voltage overshoot.

Use Scenario: Solenoid or relay driver in HVAC control modules requiring transient suppression.

IC Role / Device Role / Timing Role: High-voltage switch interfacing microcontroller GPIO to inductive loads via flyback diode.

Use Value: V_CEO(sus) = 400 V and clamped V_Clamp = 300 V prevent breakdown during L·di/dt spikes; robust RBSOA avoids 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
BU2508AX	V_CEO = 800 V, I_C = 8 A, slower t_r/t_f (0.8/0.4 µs), higher P_tot = 125 W	Targets higher-power (>30 W) ballasts and industrial SMPS where voltage margin >400 V is required	Select when system requires >600 V blocking or >5 A peak current; avoid if board space or cost sensitivity favors SOT-32 footprint
2SC4027	V_CEO = 400 V, I_C = 1.5 A, t_r/t_f = 0.3/0.2 µs, R_thJC = 3.0 °C/W	Optimized for ultra-fast timing in compact lighting drivers; lower current rating limits power scalability	Prefer for space-constrained, low-power (<8 W) ballasts where speed outweighs current headroom; verify base drive compatibility with h_FE = 15–60

Compared with BU2508AX and 2SC4027, STT13005 balances 400 V capability, 2 A current, and 0.4 µs rise time in a cost-effective SOT-32 package-making it optimal for mid-range fluorescent ballasts and sub-15 W flyback converters where thermal and footprint constraints are critical.

Availability

STT13005 is available at Aetrix Electronics and suitable for electronic ballasts, low-power flyback converters, and forward-mode DC-DC supplies requiring stable component supply, consistent lot-to-lot parametric spread, and long-term industrial availability.

Supply support for STT13005 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, digital, and mixed-signal ICs and discrete power devices for industrial, automotive, and consumer markets.

The STT13005 belongs to ST's high-voltage bipolar power transistor family, developed specifically for cost-sensitive, high-reliability lighting and low-power SMPS applications demanding fast switching and wide safe operating area.

FAQ

Is STT13005 RoHS-compliant and halogen-free?

Yes, STT13005 is manufactured in ECOPACK®-compliant versions meeting RoHS Directive 2011/65/EU and halogen-free requirements per IEC 61249-2-21. The SOT-32 package uses lead-free terminations and environmentally optimized molding compounds, verified in ST's official product change notifications and material declarations.

What is the maximum recommended case temperature for continuous operation?

The maximum case temperature for continuous operation is 125 °C, derived from T_J(max) = 150 °C and R_thJC = 2.8 °C/W with P_tot = 45 W. At T_c = 125 °C, derated power is approximately 8.9 W; full 45 W is only permissible at T_c = 25 °C with adequate heatsinking.

Can STT13005 replace STT13003 in existing designs?

Yes, STT13005 is a direct upgrade from STT13003: both share identical SOT-32 packaging and pinout, but STT13005 offers higher V_CEO (400 V vs. 300 V), improved h_FE consistency, and faster switching (t_r = 0.4 µs vs. 0.6 µs). No layout changes are needed, though base drive may require minor optimization for tighter saturation.

Does ST provide SPICE models for STT13005?

No, ST does not publish an official SPICE model for STT13005. Designers should use the electrical characteristics table (Table 4) and SOA curves (Figures 2, 12) for behavioral modeling. For simulation, the closest validated alternative is the ST's generic high-voltage NPN macro-model in the "Power Transistors" section of ST's online design tools library, configured with V_CEO = 400 V and h_FE = 30.

STT13005 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

STT13005 FAQ

1.How can I place an order for STT13005 through Aetrix?

Please submit a Request for Quotation (RFQ) for STT13005 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 STT13005 reliable?

The price and inventory of STT13005 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STT13005 is usually 5 days.

3.What payment methods are accepted for STT13005?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STT13005 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STT13005?

STT13005 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STT13005 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 STT13005?

For technical support, including STT13005 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STT13005 requirements.

6.How does Aetrix verify that STT13005 is sourced from the original manufacturer or authorized distributors?

All STT13005 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 STT13005 meets industry standards.

7.What is the process for return or replacement of STT13005?

All STT13005 units undergo pre-shipment inspection (PSI). If there is an issue with STT13005, 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 STT13005 part is unused and in its original packaging.

Return procedure for STT13005:

1.Submit a request within 90 days.

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

Tech Hub

2026-09-08 Obsolete Electronic Components: How to Source and Evaluate Replacements

A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.

2026-09-07 TTL vs CMOS Logic Levels: 74HC and 74HCT Compatibility Explained

TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.

2026-09-04 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-02 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…