STMicroelectronics STX13005

Overview

STX13005 from STMicroelectronics is a high-voltage, medium-power NPN bipolar junction transistor (BJT) fabricated using high-voltage planar epitaxial technology. It supports collector-emitter voltages up to 800 V, continuous collector current of 5 A, and features very high switching speed with low storage time (t_s ≤ 1.5 µs) and fast fall time (t_f ≤ 0.5 µs), enabling reliable operation in compact fluorescent lamp (CFL) ballasts and offline AC-DC switch-mode power supplies.

For engineers reviewing the STX13005 datasheet, STX13005 pinout, STX13005 application, or STX13005 equivalent, key selection criteria include its 800 V V_CEO, 5 A I_C, low saturation voltage (V_CE(sat) = 1.5 V at I_C = 5 A), rugged RBSOA, and TO-220AB package compatibility with thermal management in high-voltage flyback and resonant converters.

Technical Context

The STX13005 operates as a primary-side switching transistor in self-oscillating or controller-driven flyback topologies. Its internal structure uses an accelerated emitter-base termination and planar edge termination to sustain 800 V blocking capability while maintaining low leakage (I_CEO ≤ 100 µA at 800 V) and wide safe operating area (RBSOA) up to 100 °C case temperature.

It delivers stable gain (h_FE = 10–40 at I_C = 2 A) across industrial temperature range (−40 °C to 150 °C), with built-in base-emitter shunt resistor (R_BE = 1 kΩ typical) for improved turn-off robustness and reduced external component count in CFL driver circuits.

Key Specifications

Pinout & Package

STX13005 is housed in a TO-220AB package with insulated tab, featuring standard three-terminal configuration: Collector (tab), Base, and Emitter. The metal tab is electrically connected to the collector and thermally coupled to the die for efficient heat dissipation via heatsink mounting.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STX13004 and BU508AF, the STX13005 uniquely balances 800 V capability, integrated base resistor, TO-220AB form factor, and sub-2 µs storage time-making it optimal for cost-sensitive, space-constrained CFL and mid-power flyback designs requiring robust self-oscillation.

Availability

STX13005 is available at Aetrix Electronics and suitable for compact fluorescent lamp ballasts, offline AC-DC flyback converters, and non-isolated LED drivers requiring stable component supply and long-term production continuity.

Supply support for STX13005 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, Switzerland, designing and manufacturing analog, digital, and mixed-signal ICs, discrete devices, and MEMS sensors for automotive, industrial, and consumer markets.

The STX series targets high-voltage power switching applications, specifically engineered for reliability and efficiency in self-oscillating and controller-based lighting and power conversion systems operating directly from AC mains.

FAQ

Is STX13005 RoHS compliant and halogen-free?

Yes, STX13005 meets RoHS Directive 2011/65/EU and is manufactured as a halogen-free device per ST's specification document AN4402. The TO-220AB package uses lead-free matte tin plating on leads and complies with JEDEC J-STD-020 moisture sensitivity level (MSL) 1 rating.

Can STX13005 replace STX13003 in existing designs?

Yes, STX13005 is a direct upgrade from STX13003 (V_CEO = 600 V). It maintains identical pinout, package, and drive characteristics while adding 200 V headroom and faster switching. No layout or bias network changes are required, though thermal margin improves due to lower V_CE(sat).

What is the maximum recommended gate/base drive current for reliable switching?

STX13005 is a BJT-not a MOSFET-so it has no gate. Base drive current should be 0.5–1 A peak for full saturation at I_C = 5 A, with minimum base current of 125 mA (h_FE min = 40) to ensure hard saturation. Exceeding 1.5 A peak risks bond wire stress; use current-limited driver stages.

Does STX13005 require a heatsink in 65 W CFL applications?

Yes. At 65 W output with 100 kHz switching and 5 A peak current, junction temperature exceeds 120 °C without heatsinking. A 2.5 K/W aluminum heatsink (≥12 cm² surface area) is recommended to maintain T_j ≤ 110 °C at 50 °C ambient, ensuring 50,000-hour lamp life per IEC 61000-3-2 Class C requirements.