STMicroelectronics STP14NF12FP

Overview

STP14NF12FP from STMicroelectronics is an N-channel enhancement-mode Power MOSFET in TO-220FP package, rated for 120 V V_DSS, 14 A continuous drain current at T_C = 25°C, and 0.16 Ω typical R_DS(on) at V_GS = 10 V. It features low gate charge (15.5 nC), high dv/dt immunity (9 V/ns), and integrated source-drain diode with 1.5 V forward voltage at 14 A - optimized for primary-side switching in isolated DC-DC converters for telecom and computing power supplies.

For engineers reviewing the STP14NF12FP datasheet, STP14NF12FP pinout, STP14NF12FP application, or STP14NF12FP equivalent, key selection criteria include its TO-220FP thermal resistance (6 °C/W), avalanche energy rating (60 mJ), gate threshold voltage range (2–4 V), and suitability for hard-switched flyback and forward converter topologies requiring robust unclamped inductive switching capability.

Technical Context

This STripFET™ II device uses a planar vertical structure to minimize input capacitance (C_iss = 460 pF) and gate charge, enabling efficient high-frequency operation up to several hundred kHz. Its low R_DS(on) and high peak diode recovery dv/dt support stable switching under fast transient load conditions.

The MOSFET integrates a body diode characterized for reverse recovery time (t_rr = 92 ns) and charge (Q_rr = 230 nC) at 14 A, 100 A/µs di/dt, and 150°C junction temperature - critical for synchronous rectification and freewheeling paths in non-isolated buck or boost stages.

Key Specifications

Pinout & Package

STP14NF12FP uses the TO-220FP (Full-Pak) package: insulated plastic case with internal isolation barrier rated for 2500 V DC, enabling direct mounting to heatsinks without insulating pads. The package has three leads in standard 1–2–3 order (Drain–Gate–Source), with Drain connected to the metal tab.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar N-channel 120 V power MOSFET applications.

Compared with IRF640NPbF, STP14NF12FP delivers superior high-frequency efficiency and system-level reliability; versus STP16NF12, it trades current headroom and thermal performance for compact TO-220FP isolation - ideal where PCB real estate and safety isolation are prioritized over ultimate power density.

Availability

STP14NF12FP is available at Aetrix Electronics and suitable for telecom power supplies, server VRMs, industrial PLC power modules, and medical isolated AC/DC adapters requiring stable component supply and long-term manufacturability.

Supply support for STP14NF12FP 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing analog, microcontroller, power, and sensor solutions for industrial, automotive, and consumer markets.

This device belongs to ST's STripFET™ II Power MOSFET product line, engineered specifically for high-efficiency, high-reliability switching power conversion in telecom and computing infrastructure where low gate charge and robust avalanche capability are mandatory.

FAQ

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

The STP14NF12FP supports 6 A continuous drain current at T_C = 100°C, as specified in Table 1. This derating reflects thermal limitations of the TO-220FP package (R_thj-case = 6 °C/W); operation above this current requires active cooling or reduced ambient temperature to maintain T_j ≤ 175°C.

Does the TO-220FP package require electrical isolation when mounted to a heatsink?

Yes - although the TO-220FP provides 2500 V DC insulation between the drain-connected metal tab and leads, the internal die substrate remains at drain potential. Mounting to a grounded heatsink without an isolating pad violates functional insulation and risks short-circuit failure; use ST-approved insulating hardware per ECOPACK® mechanical guidelines.

Can STP14NF12FP replace STP14NF12 in existing designs?

Yes, with thermal and layout review: both share identical electrical specs and marking (P14NF12), but STP14NF12FP uses TO-220FP (insulated) versus TO-220 (non-insulated). The TO-220FP has higher thermal resistance (6 vs. 2.5 °C/W), so heatsink design must be re-evaluated to avoid exceeding T_j limits under same load conditions.

Is the body diode suitable for synchronous rectification?

No - the integrated source-drain diode has t_rr = 92 ns and Q_rr = 230 nC, making it unsuitable for high-frequency synchronous rectification where low Q_rr (<50 nC) and soft recovery are required. It is intended for freewheeling or clamping functions in flyback/forward topologies, not as a controlled rectifier replacement.