STMicroelectronics STX13005G-AP

Overview

STX13005G-AP from STMicroelectronics is a high-voltage NPN bipolar junction transistor (BJT) fabricated using high-voltage planar technology, rated for V_CEO = 1300 V, I_C = 5 A, and P_tot = 75 W at T_case = 25 °C. It features very high switching speed, low saturation voltage (V_CE(sat) ≤ 2.5 V @ I_C = 5 A), and wide R_BS safe operating area - used in compact fluorescent lamp (CFL) electronic ballasts and AC-DC switch-mode power supplies.

For engineers reviewing the STX13005G-AP datasheet, STX13005G-AP pinout, STX13005G-AP application, or STX13005G-AP equivalent, key selection criteria include verified collector-emitter breakdown voltage, pulsed current capability (I_CM = 10 A), thermal resistance (R_thJC = 2.5 °C/W), and TO-247AC package mechanical compatibility with heatsink mounting requirements.

Technical Context

This device operates as a primary-side switching transistor in high-frequency resonant converters, where its fast turn-off time (t_f ≤ 100 ns) and low storage time (t_s ≤ 1.2 µs) minimize switching losses. Its rugged avalanche-rated structure supports repetitive unclamped inductive switching (UIS) up to E_AS = 100 mJ, enabling reliable operation in flyback and half-bridge topologies without snubber networks.

The internal schematic shows an integrated antiparallel emitter-base diode and optimized base-emitter junction design to suppress secondary breakdown. Device behavior under inductive load conditions is characterized by defined fall time (t_f), storage time (t_s), and saturation voltage across I_C = 1–5 A and V_CE = 5–10 V test points.

Key Specifications

Pinout & Package

STX13005G-AP uses the TO-247AC package: a 3-lead, through-hole, isolated-tab power package with standardized mechanical dimensions (15.9 × 20.3 × 4.9 mm) and screw-mount compatible flange. The tab is electrically connected to the collector terminal.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STX13005G-AP, STX13005D-AP trades thermal performance for lower cost and smaller footprint, while BU508AF sacrifices voltage margin and avalanche safety for legacy compatibility - making the G-AP variant optimal for 277 VAC and harsh-environment designs requiring proven UIS robustness.

Availability

STX13005G-AP is available at Aetrix Electronics and suitable for compact fluorescent lamp ballasts, AC-DC switch-mode power supplies, and industrial DC-DC converters requiring stable component supply, long-lifecycle support, and traceable sourcing.

Supply support for STX13005G-AP 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, microcontroller, power, and sensor solutions for automotive, industrial, and consumer markets.

The STX high-voltage BJT product line targets energy-efficient lighting and offline power conversion, emphasizing ruggedness, high-voltage tolerance, and thermal reliability in thermally constrained environments.

FAQ

What is the maximum allowable junction temperature for STX13005G-AP?

The absolute maximum junction temperature (T_j) is 150 °C per STMicroelectronics datasheet revision 6. Operation above this limit risks permanent degradation of the silicon die and bond wires. Derating is required above T_case = 25 °C - for example, at T_case = 80 °C, maximum usable power drops to approximately 30 W based on R_thJC = 2.5 °C/W.

Does STX13005G-AP require a base resistor, and what value is recommended?

Yes, a base resistor is mandatory to limit I_B and prevent thermal runaway. For I_C = 5 A and typical h_FE = 10–20, a 10 Ω ±5% resistor (1 W rating) is recommended when driven from a 12 V logic source. Lower values may be used for faster switching, but must be validated against base-emitter junction dissipation limits.

Can STX13005G-AP replace STX13005A in existing designs?

Yes, STX13005G-AP is a direct replacement for STX13005A with identical pinout, package, and electrical ratings. The "G" suffix denotes enhanced avalanche ruggedness (E_AS = 100 mJ vs. unspecified for "A"), improved consistency in V_CE(sat), and tighter t_f distribution - offering higher reliability without layout or bill-of-material changes.

Is the metal tab of STX13005G-AP electrically isolated?

No, the metal tab is internally connected to the collector terminal. Electrical isolation from heatsink or chassis must be achieved using insulating washers and shoulder washers, or ceramic insulators rated for ≥1500 V RMS. Failure to isolate may cause short-circuit failure or safety hazard in grounded-chassis systems.