Diodes Incorporated ZXTN25100DZTA

Overview

ZXTN25100DZTA from Diodes Incorporated is a 100V NPN medium-power transistor in SOT89 package, rated for 2.5A continuous collector current and 100mV V_CE(SAT) at 1A, with 80mΩ equivalent on-resistance and AEC-Q101 qualification for automotive-grade reliability. It serves as a high-voltage switching element in DC-DC converters, LED drivers, and motor control stages where low saturation voltage and thermal robustness are critical.

For engineers reviewing the ZXTN25100DZTA datasheet, ZXTN25100DZTA pinout, ZXTN25100DZTA application, or ZXTN25100DZTA equivalent, key selection criteria include its 100V V_CEO, 2.5A I_C, SOT89 thermal performance (R_θJA = 28°C/W under optimized 50mm×50mm 2oz copper), and complementary PNP pairing with ZXTP25100CZ.

Technical Context

This NPN bipolar junction transistor operates in linear or saturated switching mode with guaranteed BV_CEO ≥ 100V and BVCBO ≥ 180V, enabling use in 48V–100V bus applications. Its f_T = 175MHz supports fast switching transitions, while h_FE = 300–900 across 10mA–2.5A ensures stable gain control in analog amplification or precision current regulation.

The device features an exposed collector pad for enhanced thermal conduction, with R_θJL = 7.95°C/W to lead and validated SOA up to 100V/2.5A under DC conditions. ESD ratings of 4kV HBM and 400V MM confirm suitability for industrial assembly environments without additional protection circuitry.

Key Specifications

Pinout & Package

Package: SOT89 - surface-mount plastic package with exposed collector pad for thermal management; dimensions per Diodes Inc. outline SOT89 (D2 = 1.71 mm, E = 2.50 mm, H = 4.10 mm).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MJD127G and ZXTN2010F, ZXTN25100DZTA uniquely delivers 100V blocking capability, AEC-Q101 compliance, and 80mΩ R_CE(SAT) in SOT89-enabling compact, high-reliability designs where voltage margin, thermal density, and automotive qualification are jointly required.

Availability

ZXTN25100DZTA is available at Aetrix Electronics and suitable for automotive LED drivers, industrial 48V DC-DC converters, and brushed DC motor control systems requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for ZXTN25100DZTA 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, specializing in high-reliability power management, signal integrity, and protection solutions for automotive, industrial, and computing markets.

ZXTN25100DZTA belongs to Diodes' ZXT series of high-voltage bipolar transistors engineered for automotive-grade switching applications demanding robust SOA, low saturation voltage, and AEC-Q101 validation.

FAQ

What is the maximum allowable junction temperature for ZXTN25100DZTA?

The absolute maximum junction temperature is +150°C, verified per JEDEC JESD22-A104. Operation at this limit requires strict adherence to derating curves: at T_A = 100°C, maximum continuous power drops to 1.8W (Note 6) or 2.4W (Note 7), depending on PCB copper area. Thermal design must maintain T_J ≤ 150°C under worst-case ambient and load conditions.

Is ZXTN25100DZTA pin-compatible with other SOT89 NPN transistors?

No universal pin compatibility exists across SOT89 NPN transistors. ZXTN25100DZTA uses the standard SOT89 pinout (Pin 1 = E, Pin 2 = B, Pin 3 = C), confirmed in Diodes' DS33706 Rev. 2–2 Figure 1. However, electrical parameters-including V_CEO, h_FE, and SOA-differ significantly from generic SOT89 transistors, so functional substitution requires full circuit validation.

Does ZXTN25100DZTA require a base resistor for safe operation?

Yes. To ensure saturation at I_C = 2.5A, the base must be driven with I_B ≥ 250mA (h_FE min = 10 at that point). A series base resistor is mandatory when using voltage-driven logic sources; typical value is 10Ω–22Ω for 3.3V/5V microcontroller outputs, sized to deliver ≥250mA while limiting base-emitter reverse voltage during turn-off.

Can ZXTN25100DZTA be used in linear amplifier configurations?

Yes, but with constraints. Its h_FE = 300–900 at I_C = 10mA–2.5A and f_T = 175MHz support small-signal amplification up to ~10MHz. However, linear operation demands careful thermal management: at 1W dissipation, T_J rises ~28°C above ambient (R_θJA = 28°C/W), limiting usable quiescent current in unheatsinked SOT89 layouts.