Diodes Incorporated ZXMN3A14FQTA

Overview

ZXMN3A14FQTA from Diodes Incorporated is a 30V N-channel enhancement-mode MOSFET qualified to AEC-Q101, with R_DS(on) = 65 mΩ @ V_GS = 10 V, I_D = 3.2 A at T_A = 25°C, and SOT23 package. It serves as a high-reliability power switch in automotive DC-DC converters, motor control, and disconnect circuits.

For engineers reviewing the ZXMN3A14FQTA datasheet, ZXMN3A14FQTA pinout, ZXMN3A14FQTA application, or ZXMN3A14FQTA equivalent, key selection criteria include its low gate charge (8.6 nC), fast switching (t_D(off) = 13.1 ns), AEC-Q101 qualification, and 95 mΩ R_DS(on) at 4.5 V drive for 3.3 V logic compatibility.

Technical Context

This MOSFET employs planar silicon technology optimized for automotive-grade thermal stability and low-voltage gate drive. Its threshold voltage range (1.0–2.2 V) enables reliable turn-on with 3.3 V microcontrollers, while the body diode exhibits t_rr = 13 ns and Q_rr = 7 nC for efficient synchronous rectification.

The device operates across –55°C to +150°C junction temperature, with R_θJA = 83°C/W on FR4 PCB (t ≤ 5 s), supporting compact power management designs where thermal margin and pulse-current capability (I_DM = 18 A) are critical.

Key Specifications

Pinout & Package

Package: SOT23 (JEDEC TO-236AB), surface-mount, green molding compound (UL 94V-0), matte tin-plated copper leadframe.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar N-channel MOSFET applications.

Compared with DMN3025LSD-13 and AO3400A, ZXMN3A14FQTA balances gate drive simplicity (low Q_g, 3.3 V compatible), automotive qualification, and thermal robustness-making it optimal for cost-sensitive, thermally constrained AEC-Q101 designs where driver strength is limited.

Availability

ZXMN3A14FQTA is available at Aetrix Electronics and suitable for automotive DC-DC converters, motor control subsystems, and power management functions requiring stable component supply and long-term lifecycle assurance.

Supply support for ZXMN3A14FQTA 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.

ZXMN3A14FQTA belongs to Diodes' AEC-Q101-qualified ZXMN automotive MOSFET family, engineered specifically for high-reliability 12 V system power switching in engine control, body electronics, and ADAS modules.

FAQ

Is ZXMN3A14FQTA suitable for high-frequency switching above 1 MHz?

Yes. With t_D(off) = 13.1 ns, t_f = 5.3 ns, and Q_g = 8.6 nC, ZXMN3A14FQTA supports stable operation up to 2 MHz in buck converters when paired with a 1–2 Ω gate driver. Its C_oss = 82 pF and low Crss minimize Miller-induced shoot-through risk.

What is the maximum continuous drain current at 100°C ambient?

At T_A = 100°C on FR4 with 1 oz copper, derating from P_D = 1.5 W (R_θJA = 83°C/W) yields ~1.0 A continuous I_D. This is confirmed by the Safe Operating Area curve on page 3 of DS39100 Rev. 1–2, which shows 1.0 A sustainable at V_DS = 10 V and T_A = 100°C.

Does ZXMN3A14FQTA have integrated ESD protection?

No. The datasheet does not specify on-chip ESD protection structures. External TVS or RC filtering is recommended on gate and drain lines in automotive environments per ISO 10605, especially when interfacing with connectors or long traces.

Can ZXMN3A14FQTA be used in a high-side configuration with 12 V supply?

Yes, but gate drive must exceed V_DS by ≥10 V for full enhancement. A bootstrap or charge-pump circuit is required to achieve V_GS ≥ 12 V when V_DS = 12 V. Its ±20 V V_GS rating supports this, and R_DS(on) remains stable up to V_GS = 15 V.