Diodes Incorporated DXTN22040CFG-7

Overview

DXTN22040CFG-7 from Diodes Incorporated is a 40V NPN low V_CE(sat) transistor in PowerDI3333-8 package, rated for 2A continuous collector current and 3A peak pulse current, with V_CE(sat) < 220 mV at 1 A. It serves as a high-efficiency switching element in DC-DC converters and supply-line switching circuits where thermal density and low conduction loss are critical.

For engineers reviewing the DXTN22040CFG-7 datasheet, DXTN22040CFG-7 pinout, DXTN22040CFG-7 application, or DXTN22040CFG-7 equivalent, key selection criteria include verified V_CE(sat) performance at 1–2 A, thermal resistance (R_θJL = 7.4 °C/W), wettable flank compatibility for automated optical inspection, and AEC-Q101 readiness for automotive-grade designs.

Technical Context

This NPN transistor features a BV_CEO of 40 V and BV_CBO of 50 V, enabling robust operation in 24 V industrial and automotive supply rails. Its h_FE ranges from 329 (IC = 100 mA) to 80 (IC = 2 A), supporting stable gain across load conditions.

With f_T = 200 MHz and switching times of t_delay = 7.9 ns, t_rise = 2.9 ns, and t_fall = 32.6 ns at IC = 1 A, it supports medium-frequency switching applications while maintaining low saturation voltage and fast turn-off behavior.

Key Specifications

Pinout & Package

Package: PowerDI^®3333-8 (SWP, Type UX), surface-mount, thermally enhanced plastic case with wettable flank leads and matte tin plating. Dimensions: 3.30 mm × 3.30 mm × 0.80 mm (L × W × H); collector tab occupies full bottom-side center for thermal transfer.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar NPN low-V_CE(sat) transistor applications.

Compared with DMT3006LPSQ-13, DXTN22040CFG-7 delivers 3× lower thermal resistance and validated wettable flank AOI compatibility; versus DXTP22040CFG, it provides complementary polarity while maintaining identical thermal and saturation performance-critical for balanced driver designs.

Availability

DXTN22040CFG-7 is available at Aetrix Electronics and suitable for DC-DC conversion, automotive LED driver, and industrial supply line switching applications requiring stable component supply, AEC-Q101-aligned qualification, and high-density thermal management.

Supply support for DXTN22040CFG-7 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.

This device belongs to Diodes' Power Transistor product line, engineered specifically for high-efficiency, high-density power switching in automotive, industrial, and consumer power management systems where low V_CE(sat) and thermal reliability are essential.

FAQ

What is the maximum allowable junction temperature for DXTN22040CFG-7?

The absolute maximum operating junction temperature is +150 °C, as specified in the Absolute Maximum Ratings table. Derating begins above +25 °C ambient per the thermal characteristics curve: at 25 mm × 25 mm 2 oz copper, PD drops linearly from 2.3 W at 25 °C to 0 W at 150 °C ambient.

Is DXTN22040CFG-7 qualified to AEC-Q101?

Yes-the datasheet explicitly states suitability for automotive applications requiring AEC-Q101 qualification, PPAP capability, and IATF 16949 certified manufacturing. Full qualification reports are available upon request through Diodes' automotive support team.

How does the PowerDI3333-8 package improve thermal performance over SOT-23 or TO-252?

PowerDI3333-8 integrates a large exposed collector tab directly bonded to the die's backside, achieving R_θJL = 7.4 °C/W-over 4× better than typical SOT-23 (R_θJA ≈ 300 °C/W) and 2.5× better than TO-252 (R_θJA ≈ 18–25 °C/W). This enables higher power density without external heatsinks.

Can DXTN22040CFG-7 replace a MOSFET in low-voltage switching applications?

It can serve as a cost-effective bipolar alternative where gate drive complexity or FET threshold variation is problematic, but only at frequencies ≤ 500 kHz due to base charge storage limitations (t_storage = 728 ns). For >1 MHz or zero-threshold operation, a MOSFET remains preferable.