Diodes Incorporated DXTA92-13

Overview

DXTA92-13 from Diodes Incorporated is a high-voltage PNP bipolar junction transistor in SOT89 package, rated for -300V V_CEO, -500mA continuous collector current, and 1W power dissipation at T_A = +25°C on minimum pad layout. It delivers h_FE ≥ 25 at -1mA, -0.5V V_CE(sat) at -20mA/-2mA drive, and 50MHz f_T, serving as a medium-power switching or amplification device in industrial HV DC-DC converters and relay drivers.

For engineers reviewing the DXTA92-13 datasheet, DXTA92-13 pinout, DXTA92-13 application, or DXTA92-13 equivalent, key selection criteria include verified -300V breakdown rating, SOT89 thermal performance with R_θJL = 5.7°C/W, complementary pairing with DXTA42, and automotive-grade manufacturing capability per IATF 16949.

Technical Context

This PNP transistor uses epitaxial planar die construction to sustain high-voltage blocking while maintaining stable gain across -1mA to -30mA operating range. Its -0.5V V_CE(sat) at -20mA/-2mA enables low-loss switching in flyback snubber circuits and HV line driver stages.

The SOT89 package features an exposed collector pad thermally coupled to PCB copper, enabling 2.0W derated power dissipation on 50mm × 50mm 1oz copper. Thermal resistance from junction to lead (R_θJL = 5.7°C/W) confirms direct heat path design optimized for board-level thermal management.

Key Specifications

Pinout & Package

Package: SOT89 - Molded plastic, green compound (UL 94V-0), matte tin-plated copper leadframe, 0.072g weight, moisture sensitivity level 1.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-voltage PNP transistor applications.

Compared with DXTA92-13, DXTA42-13 offers identical voltage/current ratings in NPN form for complementary designs, while MJD2955T4G trades voltage headroom for higher current capacity and different thermal interface-neither is pin-compatible, requiring layout revision.

Availability

DXTA92-13 is available at Aetrix Electronics and suitable for industrial HV power supplies, automotive relay interfaces, AC line monitoring circuits, and LED current regulation requiring stable component supply and traceable green sourcing.

Supply support for DXTA92-13 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

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.

The DXTA92 belongs to Diodes' high-voltage bipolar transistor product line, engineered specifically for robust medium-power switching in industrial and automotive environments where reliability under voltage stress and thermal cycling is critical.

FAQ

What is the maximum safe operating voltage for DXTA92-13 in continuous DC applications?

The DXTA92-13 is rated for -300V collector-emitter voltage (V_CEO) and -300V collector-base voltage (V_CBO) at T_A = +25°C. For continuous DC operation, sustained voltage must remain ≤ -300V with appropriate derating per ambient temperature and PCB copper area, as defined in the Safe Operating Area (SOA) curve in Figure 1 of DS31159.

Can DXTA92-13 be used in automotive-compliant designs?

Yes - Diodes manufactures DXTA92-13 in IATF 16949-certified facilities and supports PPAP documentation. While the standard part is not pre-qualified to AEC-Q101, Diodes offers automotive-grade variants upon request with full change control, making it suitable for non-safety-critical automotive applications like body control modules and lighting drivers.

How does the SOT89 package affect thermal performance compared to TO-92 or TO-220?

The SOT89's exposed collector pad provides R_θJL = 5.7°C/W - significantly better than TO-92 (≈200°C/W) and competitive with small TO-220 variants. When soldered to ≥25mm × 25mm 1oz copper, DXTA92-13 achieves 1.6W power dissipation, enabling compact, heatsink-free designs where TO-92 would thermally saturate and TO-220 would overoccupy board area.

Is DXTA92-13 pin-compatible with other SOT89 PNP transistors like MPSA92 or ZTX951?

No - although all use SOT89, pinouts differ: DXTA92-13 has Collector-Base-Emitter (C-B-E) arrangement, whereas MPSA92 is E-B-C and ZTX951 is C-E-B. Using them interchangeably without board revision will cause functional failure or damage due to reversed polarity connections.