NXP Semiconductors PHX14NQ20T,127

Overview

PHX14NQ20T from NXP Semiconductors (formerly Philips Semiconductors) is an N-channel enhancement-mode TrenchMOS power transistor in SOT186A (FPAK) package, rated for 200 V drain-source voltage, 7.6 A continuous drain current at 25 °C, and ≤230 mΩ on-state resistance at V_GS = 10 V and I_D = 7 A. It is designed for DC–DC converters and general-purpose switching applications requiring low conduction loss and fast switching.

For engineers reviewing the PHX14NQ20T datasheet, PHX14NQ20T pinout, PHX14NQ20T application, or PHX14NQ20T equivalent, key selection considerations include its isolated heatsink mounting capability, 2500 V_RMS isolation rating, avalanche energy rating of 70 mJ, and thermal resistance of 4.17 K/W junction-to-mounting-base - critical for high-reliability industrial power stages.

Technical Context

This device uses trench-gate MOSFET technology to achieve low R_DS(ON) and high transconductance (g_fs = 12.1 S typ). Its gate threshold voltage (V_GS(TO)) ranges from 2 V to 4 V at 25 °C, with reduced hysteresis over temperature (1 V min at 150 °C).

The integrated body diode supports synchronous rectification and flyback operation, exhibiting 1.0–1.5 V forward voltage at 14 A and 135 ns reverse recovery time. Its internal drain and source inductances (L_d = 4.5 nH, L_s = 7.5 nH) are optimized for high-frequency switching stability.

Key Specifications

Pinout & Package

SOT186A (FPAK) is a plastic single-ended package with electrically isolated heatsink mounting plane, 3 leads, and TO-220-compatible footprint. The case (heatsink tab) is isolated from all terminals and serves as thermal interface only.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STP14NF20 and IRF640NPBF, PHX14NQ20T uniquely combines certified 2500 V_RMS isolation, 70 mJ avalanche capability, and SOT186A's integrated heatsink interface - making it the only option among the three qualified for industrial power stages requiring both safety compliance and ruggedness.

Availability

PHX14NQ20T is available at Aetrix Electronics and suitable for industrial DC–DC converters, switch-mode power supplies, and motor drive half-bridge stages requiring stable component supply and long-term lifecycle assurance.

Supply support for PHX14NQ20T 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

NXP Semiconductors is a global semiconductor company formed from the spin-off of Philips' semiconductor division, specializing in secure connectivity solutions, automotive, industrial, and power management ICs.

The PHX14NQ20T belongs to NXP's TrenchMOS power transistor family, engineered for high-efficiency, high-reliability industrial switching applications where isolation, avalanche robustness, and thermal performance are critical.

FAQ

What is the maximum continuous drain current rating for PHX14NQ20T at 100 °C heatsink temperature?

The PHX14NQ20T supports 4.8 A continuous drain current at T_hs = 100 °C and V_GS = 10 V, as specified in the Limiting Values table. This derating reflects thermal constraints of the SOT186A package and must be applied in thermal design calculations alongside R_{th j-hs} = 4.17 K/W to ensure junction temperature remains below 150 °C. PHX14NQ20T datasheets confirm this value applies under steady-state conduction with proper heatsinking.

Does PHX14NQ20T have a built-in body diode, and what are its key characteristics?

Yes, PHX14NQ20T integrates a body diode with typical forward voltage of 1.0 V at 14 A and reverse recovery time of 135 ns. Its reverse recovery charge is 690 nC at V_R = 30 V. These parameters are measured with V_GS = 0 V and enable use in freewheeling and synchronous rectification roles without external diodes in many medium-frequency applications. PHX14NQ20T's body diode performance is fully characterized in the Reverse Diode Characteristics section.

What is the gate threshold voltage range for PHX14NQ20T across its operating temperature range?

The gate threshold voltage (V_GS(TO)) of PHX14NQ20T ranges from 1 V (minimum at T_j = 150 °C) to 6 V (maximum at T_j = −55 °C), with a typical value of 3 V at 25 °C. This wide variation necessitates gate drive designs that maintain ≥10 V over temperature to ensure full enhancement and minimize R_DS(ON) drift. PHX14NQ20T's V_GS(TO) vs. T_j curve is provided in Figure 10 of the datasheet.

Can PHX14NQ20T be used in avalanche mode, and what are the validated limits?

Yes, PHX14NQ20T is rated for non-repetitive avalanche operation with E_AS = 70 mJ and I_AS = 14 A under defined test conditions (unclamped inductive load, t_p = 38 µs, V_DD ≤ 25 V, V_GS = 10 V). These limits are verified per IEC 134 and documented in the Avalanche Energy Limiting Values table. PHX14NQ20T must not be operated repeatedly in avalanche without verifying thermal and reliability impact per application-specific stress analysis.

What is the thermal resistance from junction to ambient for PHX14NQ20T in free air?

The PHX14NQ20T has a thermal resistance of R_{th j-a} = 55 K/W when mounted in free air (no heatsink), as stated in the Thermal Resistances table. This value assumes standard SOT186A mounting per JEDEC guidelines and is significantly higher than the 4.17 K/W R_{th j-hs}, confirming that effective heatsinking is essential for sustained operation above ~1 W dissipation. PHX14NQ20T's thermal performance is validated in Figures 4 and 6 of the datasheet.