Diodes Incorporated ZXTN19020DGTA

Overview

ZXTN19020DGTA from Diodes Incorporated is a 20V NPN high-gain power transistor in SOT223 package, rated for 9A continuous collector current, with V_CE(sat) < 35mV at 1A and R_CE(sat) = 20mΩ. It features BV_CEX > 70V, BV_CEO = 20V, and is AEC-Q101 qualified for automotive-grade reliability in high-current switching applications such as DC-DC converter primary-side switches and motor drive H-bridge legs.

For engineers reviewing the ZXTN19020DGTA datasheet, ZXTN19020DGTA pinout, ZXTN19020DGTA application, or ZXTN19020DGTA equivalent, key selection criteria include its low saturation resistance, high DC current gain (h_FE = 300–900 at 100mA), thermal resistance (R_θJA = 23.5°C/W with 50mm × 50mm 2oz copper), and complementary PNP pairing with ZXTP19020DG.

Technical Context

This NPN transistor operates in linear and saturated switching modes, supporting forward-blocking (BV_CEX > 70V) and standard active-region amplification. Its high h_FE (≥130 at 9A) enables efficient base-drive reduction in high-current loads, while f_T = 160MHz supports fast switching transitions in PWM-controlled power stages.

Designed for rugged industrial and automotive environments, it delivers stable performance across −55°C to +150°C junction temperature range, with ESD HBM rating of 4kV and JEDEC-compliant moisture sensitivity level 1. The SOT223 package provides enhanced thermal dissipation via exposed collector lead and solderable matte tin plating per MIL-STD-202.

Key Specifications

Pinout & Package

Package: SOT223 - Surface-mount plastic package with exposed collector tab for thermal conduction and mechanical anchoring. Molded "Green" compound meets UL 94V-0 flammability rating and J-STD-020 Level 1 moisture sensitivity.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-current NPN switching applications.

Compared with ZXTN19020DGTA, ZXTN20020DGTA trades gain and on-resistance for higher voltage rating, while DMT3002LPSQ-13 shifts to MOSFET architecture-offering lower conduction loss and gate-drive simplicity but requiring careful attention to Miller capacitance and gate drive strength in high-dI/dt environments.

Availability

ZXTN19020DGTA is available at Aetrix Electronics and suitable for DC-DC converters, motor drive subsystems, and automotive relay control circuits requiring stable component supply and AEC-Q101 compliance.

Supply support for ZXTN19020DGTA 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 consumer markets.

ZXTN19020DGTA belongs to Diodes' ZXT series of high-gain, high-current bipolar transistors engineered specifically for demanding automotive and industrial switching applications where robustness, thermal performance, and AEC-Q101 validation are mandatory.

FAQ

What is the maximum allowable base current for ZXTN19020DGTA?

The absolute maximum base current is 1A per the datasheet's Absolute Maximum Ratings table. For reliable 9A saturation, the recommended base drive is 450mA (IB = IC / hFE ≈ 9A / 20), verified by V_CE(sat) = 200–250mV test condition. Exceeding 1A risks metallization failure or bond wire lift, especially under pulsed conditions.

Can ZXTN19020DGTA replace a MOSFET in a 12V motor drive?

Yes, but with design trade-offs: it delivers lower gate-drive complexity and immunity to dV/dt-induced turn-on, yet requires sustained base current (450mA) and exhibits higher conduction loss than low-R_DS(on) MOSFETs. Use it where cost, EMI, or gate-drive resource constraints outweigh efficiency targets.

Is the exposed collector tab electrically isolated from other pins?

No-the collector tab is internally bonded to Pin 3 (collector) and forms a single electrical node. It must be connected to the same net as Pin 3 and should not be floated or grounded independently. Thermal vias beneath the tab must maintain electrical continuity to the collector net to avoid short-circuit risk.

Does ZXTN19020DGTA require a base-emitter resistor for stability?

Yes-a base-emitter resistor (typically 1–10kΩ) is strongly recommended to prevent leakage-induced turn-on during high-temperature operation or when driven by open-collector logic. The datasheet specifies BVECO = 4.5V and BVEBO = 7V, indicating susceptibility to unintended conduction if V_BE drifts near threshold under thermal stress.