Diodes Incorporated ZXTP25015DFHTA

Overview

ZXTP25015DFHTA from Diodes Incorporated (formerly Zetex Semiconductors) is a PNP medium-power bipolar junction transistor in SOT23 package, rated for −15 V V_CEO, −4 A continuous collector current, 1.25 W power dissipation on 50 mm × 50 mm PCB, and 33 mΩ R_CE(sat) at I_C = −1 A. It serves as a high-side switch or gate driver in DC-DC converters and motor control circuits.

For engineers reviewing the ZXTP25015DFHTA datasheet, ZXTP25015DFHTA pinout, ZXTP25015DFHTA application, or ZXTP25015DFHTA equivalent, key selection criteria include verified −15 V blocking capability, sub-55 mV V_CE(sat) at 1 A, thermal resistance of 100 °C/W under standard layout, and compatibility with SOT23 footprint constraints in space-constrained power stages.

Technical Context

This PNP BJT employs advanced silicon process and optimized SOT23 packaging to sustain −4 A continuous collector current with low saturation voltage. Its −15 V V_CEO and −3 V V_ECO ratings support operation in high-side switching topologies where reverse emitter-collector stress occurs during turn-off transients.

The device delivers h_FE = 90–900 across I_C = −10 mA to −4 A, enabling robust base drive design for both linear and saturated switching modes. Transition frequency f_T = 295 MHz confirms suitability for fast-switching applications up to several hundred kHz without significant gain roll-off.

Key Specifications

Pinout & Package

SOT23-3 plastic surface-mount package with gull-wing leads; 2.80–3.04 mm length, 1.20–1.40 mm width, 1.12 mm max height; JEDEC TO-236AB compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar PNP medium-power switching applications.

Compared with ZXTN25015DFHTA and MMBT3906LT1G, ZXTP25015DFHTA uniquely combines −4 A current handling, −15 V blocking, and −55 mV saturation voltage in SOT23 - making it irreplaceable for high-current, space-constrained high-side switching where thermal and voltage margins are critical.

Availability

ZXTP25015DFHTA is available at Aetrix Electronics and suitable for DC-DC converters, motor drives, and high-side gate drivers requiring stable component supply across industrial, automotive, and medical electronics programs.

Supply support for ZXTP25015DFHTA 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 acquired Zetex Semiconductors in 2008 and maintains its portfolio of high-performance discrete semiconductors focused on power efficiency and miniaturization.

This device belongs to Zetex's medium-power bipolar transistor product line, engineered specifically for high-density power management in space-limited applications such as portable power supplies and embedded motor controllers.

FAQ

What is the maximum allowable PCB copper area to achieve the 1.25 W power rating?

The 1.25 W rating is specified for mounting on a 50 mm × 50 mm × 1.6 mm FR4 PCB with high-coverage single-sided 2 oz copper. Reducing copper area increases thermal resistance beyond 100 °C/W, requiring derating per the 9.6 mW/°C linear factor. Layout verification using thermal simulation is recommended for non-standard board sizes.

Can ZXTP25015DFHTA be used in parallel for higher current handling?

No - this PNP BJT lacks inherent current-sharing characteristics due to negative temperature coefficient of V_BE(sat). Parallel operation risks thermal runaway unless actively balanced with individual emitter resistors and matched h_FE bins. For >4 A, consider dedicated power MOSFETs or integrated high-side switches.

Is the −3 V V_ECO rating sufficient for driving N-channel MOSFET gates?

Yes - when used as a gate pull-up, the emitter connects to V_CC and collector to MOSFET gate. During turn-off, V_EC reaches ~V_GS(th) (typically 1–3 V), staying within the −3 V V_ECO limit. Exceeding this requires clamping or alternative topology.

Does the device meet AEC-Q101 for automotive use?

No - ZXTP25015DFHTA is not AEC-Q101 qualified. While its −55 to +150 °C operating range overlaps automotive requirements, qualification testing (including HTOL, temperature cycling, and ESD) was not performed. For automotive applications, Diodes Incorporated offers AEC-Q101 variants such as DZT5551Q.