Nexperia USA Inc. PSMN1R9-40PLQ

Overview

PSMN1R9-40PL from Nexperia is a logic-level N-channel TrenchMOS power MOSFET in TO-220AB (SOT78) package, rated for 40 V V_DS, 1.7 mΩ R_DS(on) at V_GS = 10 V and 25 A, with 150 A continuous drain current capability at T_mb = 25 °C and 349 W total power dissipation - optimized for high-efficiency motor control in battery-powered power tools.

For engineers reviewing the PSMN1R9-40PL datasheet, PSMN1R9-40PL pinout, PSMN1R9-40PL application, or PSMN1R9-40PL equivalent, key selection criteria include its low 1.4–1.7 mΩ on-resistance at 4.5 V and 10 V gate drive, robust 801.1 mJ unclamped avalanche energy rating, and thermal resistance of 0.35 K/W from junction to mounting base - critical for thermally constrained tool motor drivers.

Technical Context

This device employs TrenchMOS technology to achieve ultra-low conduction losses while maintaining logic-level gate drive compatibility (V_GS(th) typ. 1.7 V, max 2.45 V at −55 °C). Its gate threshold voltage remains stable across temperature (0.5–2.3 V range from −55 °C to 175 °C), enabling reliable turn-on in cold-start battery tool applications.

The MOSFET features integrated body diode with 57 ns reverse recovery time and 97 nC recovered charge, supporting synchronous rectification and freewheeling in H-bridge motor drives. Its SOA supports 1332 A pulsed drain current (t_p ≤ 10 µs), enabling robust overcurrent handling during stall conditions.

Key Specifications

Pinout & Package

TO-220AB (SOT78) plastic single-ended package with heatsink-mounted base, 3 leads, and one mounting hole. Mounting base serves as drain connection and primary thermal path.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IRF1404PBF and STP110N4F6, PSMN1R9-40PL delivers 2.4× lower R_DS(on), 2.5× higher avalanche energy, and superior thermal resistance - making it the optimal choice for high-efficiency, high-reliability battery tool motor drivers where thermal headroom and transient robustness are critical.

Availability

PSMN1R9-40PL is available at Aetrix Electronics and suitable for battery-powered power tools, uninterruptible power supplies, and industrial motor control systems requiring stable component supply, long-term lifecycle support, and traceable sourcing for production programs.

Supply support for PSMN1R9-40PL 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 - spun off from Philips in 2017 and headquartered in Nijmegen, Netherlands.

This part belongs to Nexperia's TrenchMOS logic-level power MOSFET product line, engineered specifically for high-efficiency, thermally demanding applications in battery-operated power tools and industrial motor drives.

FAQ

What is the maximum continuous drain current for PSMN1R9-40PL under real-world PCB heatsinking?

The datasheet specifies 150 A continuous drain current at T_mb = 25 °C with ideal heatsinking. In typical double-sided PCB designs with copper pour and modest heatsink contact, derating to 80–100 A is recommended to maintain T_j ≤ 150 °C. The limiting factor is package thermal resistance, not silicon capability.

Can PSMN1R9-40PL be driven directly by a 3.3 V microcontroller GPIO without a gate driver?

Yes - its V_GS(th) ranges from 0.5 V to 2.45 V, and R_DS(on) is 1.65–1.94 mΩ at V_GS = 4.5 V. At 3.3 V, it achieves partial enhancement (R_DS(on) ~2.5–3.0 mΩ), sufficient for low-duty-cycle or low-current applications; for full 1.7 mΩ performance, 4.5 V or higher is required.

How does the 801.1 mJ avalanche rating translate to real motor-drive reliability?

This rating means the device can absorb a single 801.1 mJ inductive energy spike - equivalent to interrupting 150 A through 72 µH inductance at 40 V. In brushed tool motors (typically 50–200 µH), this covers worst-case stall or commutation events without failure, eliminating need for external avalanche diodes in most designs.

Is the TO-220AB mounting base electrically isolated from the PCB in standard layouts?

No - Pin 2 (D) and the mounting base are internally connected and electrically common. When mounted to a metal heatsink, the drain is referenced to heatsink potential. Isolation requires insulating hardware (e.g., silicone washer + shoulder screw) or use of an isolated heatsink mount, which increases R_th(j-mb) by ~0.1–0.2 K/W.