Diodes Incorporated ZXTN25015DFHTA

Overview

ZXTN25015DFHTA from Diodes Incorporated (formerly Zetex Semiconductors) is an NPN medium-power bipolar junction transistor in SOT23 package, rated for 5 A continuous collector current, 15 V V_CEO, and 1.25 W power dissipation on a 50 mm × 50 mm PCB with 2 oz copper. It delivers V_CE(sat) ≤ 40 mV at I_C = 1 A / I_B = 100 mA and h_FE = 300–900, optimized for high-efficiency switching in compact DC-DC converters and gate drive circuits.

For engineers reviewing the ZXTN25015DFHTA datasheet, ZXTN25015DFHTA pinout, ZXTN25015DFHTA application, or ZXTN25015DFHTA equivalent, key selection criteria include its low saturation voltage under high-current drive, thermal performance on standard FR4 layouts, complementary PNP pairing with ZXTP25015DFH, and suitability for space-constrained motor and LED driver stages requiring fast switching and minimal conduction loss.

Technical Context

This device employs an advanced epitaxial process to achieve high gain and low R_CE(sat) (25 mΩ typical) while maintaining robust reverse blocking capability: BVECO = 4.5 V and V_EBO = 7 V ensure stable operation in bidirectional or reverse-biased emitter configurations. Its f_T = 150–240 MHz supports fast switching up to ~100 ns total transition time (t_d + t_r + t_s + t_f = 228 ns).

Thermal design is defined by multiple R_JA ratings: 100 °C/W on 50 mm × 50 mm 2 oz copper enables 1.25 W dissipation at T_amb = 25 °C, with linear derating of 9.6 mW/°C. The SOT23 footprint allows integration into dense power stages without thermal vias or external heatsinking in sub-1 W average-power applications.

Key Specifications

Pinout & Package

Package: SOT23 (TO-236AB), 3-lead surface-mount plastic package with standardized footprint (max dimensions: 3.05 × 1.40 × 1.10 mm). Pin assignment verified per Zetex Issue 1 (May 2006) top-view diagram.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MMBT4401LT1G and DMT3005LPS-7, ZXTN25015DFHTA uniquely balances 5 A current handling, sub-40 mV saturation, and standard 3-pin SOT23 compatibility-making it optimal for cost-sensitive, space-constrained medium-power switching where thermal pads are impractical.

Availability

ZXTN25015DFHTA is available at Aetrix Electronics and suitable for LED driving, DC-DC converter synchronous rectification, and MOSFET/IGBT gate driving applications requiring stable component supply and consistent parametric performance across production batches.

Supply support for ZXTN25015DFHTA 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 high-performance analog and discrete product lines with focus on power efficiency and miniaturization.

ZXTN25015DFHTA belongs to Zetex's "Power Transistor" family, engineered specifically for high-current, low-saturation switching in compact power management and interface circuits where thermal and layout constraints preclude larger packages.

FAQ

What is the maximum safe operating temperature for ZXTN25015DFHTA?

The device has a specified junction temperature range of –55 °C to +150 °C. Under continuous operation, the absolute maximum junction temperature is 150 °C. With R_JA = 100 °C/W on a 50 mm × 50 mm PCB, this limits usable power dissipation to 1.25 W at 25 °C ambient; derating is required above that ambient temperature using the 9.6 mW/°C factor.

Can ZXTN25015DFHTA be used in linear amplifier applications?

No-it is optimized for switching operation, not linear amplification. Its h_FE variation (25–900) across current range and lack of SOA curves for linear mode make it unsuitable for Class-A or AB amplifiers. Use only in saturated-switch or pulse-driven configurations where V_CE remains near V_CE(sat) or fully off.

Is ZXTN25015DFHTA RoHS compliant and halogen-free?

Yes. As a Diodes Incorporated product manufactured post-2008, ZXTN25015DFHTA conforms to RoHS Directive 2011/65/EU and is halogen-free per IEC 61249-2-21. The SOT23 package uses matte tin lead finish and green molding compound meeting JEDEC J-STD-020 moisture sensitivity level 1.

How does the complementary PNP ZXTP25015DFH pair with ZXTN25015DFHTA in H-bridge designs?

ZXTP25015DFH matches ZXTN25015DFHTA in voltage rating (V_CEO = 15 V), current capability (I_C = 5 A), and thermal characteristics (R_JA = 100 °C/W), enabling symmetrical high-side/low-side switching. Their matched V_CE(sat) (<40 mV) and h_FE (300–900) minimize shoot-through risk and ensure balanced conduction loss in bidirectional motor control stages.