Nexperia USA Inc. PHB33NQ20T,118

Overview

PHB33NQ20T from Nexperia is a standard-level N-channel TrenchMOS power MOSFET in D2PAK (SOT404) package, rated for 200 V V_DS, 32.7 A continuous drain current at T_mb = 25 °C, and 65 mΩ typical R_DS(on) at V_GS = 10 V and T_j = 25 °C. It serves as a primary-side switching device in DC-to-DC converters requiring high efficiency and fast switching.

For engineers reviewing the PHB33NQ20T datasheet, PHB33NQ20T pinout, PHB33NQ20T application, or PHB33NQ20T equivalent, key selection criteria include its 0.65 K/W junction-to-mounting-base thermal resistance, 9.6 nC gate-drain charge, avalanche ruggedness (190 mJ), and suitability for high-frequency hard-switching topologies with low gate drive complexity.

Technical Context

This MOSFET employs TrenchMOS technology to achieve low R_DS(on) and fast switching with minimal gate charge-Q_G(tot) = 32.2 nC and Q_GD = 9.6 nC at V_DS = 100 V and I_D = 25 A. Its gate threshold voltage ranges from 1 V (T_j = 175 °C) to 4.4 V (T_j = −55 °C), enabling robust turn-on margin across temperature.

The device features an integrated source-drain diode with 150 ns reverse recovery time and 645 nC recovered charge, supporting synchronous rectification and freewheeling roles. Its mounting base is electrically connected to the drain, requiring isolation in PCB layout, and thermal performance is optimized via direct heatsink coupling through the metal base.

Key Specifications

Pinout & Package

PHB33NQ20T uses the SOT404 (D2PAK) plastic surface-mount package with a copper mounting base thermally and electrically tied to the drain. Pin 2 is internally connected to the mounting base and not externally accessible; only pins 1 (Gate), 3 (Source), and the base (Drain) are functional terminals.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STP33N20 and IRF640NPBF, PHB33NQ20T delivers superior thermal performance (0.65 K/W vs. ≥1.5 K/W), lower switching losses (9.6 nC Q_GD vs. ≥15 nC), and higher current capability-making it optimal for space-constrained, high-frequency, high-efficiency power stages.

Availability

PHB33NQ20T is available at Aetrix Electronics and suitable for server power supplies, industrial DC-DC converters, and telecom rectifier modules requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for PHB33NQ20T 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

Nexperia is a global semiconductor expert focused on high-volume, high-reliability discrete, logic, and MOSFET solutions, with roots in NXP's standard products division.

PHB33NQ20T belongs to Nexperia's TrenchMOS standard-level power MOSFET product line, engineered for computing, communications, consumer, and industrial power conversion where efficiency, thermal density, and ruggedness are critical.

FAQ

Is PHB33NQ20T suitable for gate drive with 5 V logic?

No. PHB33NQ20T is a standard-level MOSFET requiring V_GS ≥10 V for full enhancement. Its gate threshold voltage is 2–4 V at 25 °C, but R_DS(on) remains high below 8 V-typical value is 182 mΩ at V_GS = 10 V and T_j = 175 °C. A dedicated 10–12 V gate driver is mandatory for low-loss operation.

How is the mounting base electrically connected?

The mounting base is internally bonded to the drain terminal (Pin 2). It is not isolated and must be treated as a live high-voltage node. PCB layout requires full creepage/clearance isolation from other circuitry and chassis ground, and thermal interface material must be electrically insulating if heatsink grounding is required.

What is the maximum safe operating temperature for continuous use?

The absolute maximum junction temperature is 175 °C, but continuous operation should be limited to T_j ≤150 °C per Nexperia's reliability guidelines. At T_mb = 100 °C, the rated continuous drain current drops to 23.1 A-designers must apply derating curves from Figure 1 and ensure thermal design maintains T_j within this limit under worst-case ambient and airflow conditions.

Does PHB33NQ20T have built-in ESD protection?

Yes. The device meets HBM ESD classification of Class 1C (≥1 kV, <2 kV) per JESD22-A114. However, it lacks dedicated gate protection diodes-external Zener clamping (e.g., 15 V TVS) is recommended in high-noise environments to prevent gate oxide damage from transient overvoltage exceeding ±20 V.