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Home > Products > Discrete Semiconductor Products > Transistors > FETs, MOSFETs > FETs, MOSFETs

STMicroelectronics STP5NK65ZFP

Name: STP5NK65ZFP
Brand: STMicroelectronics
SKU: STP5NK65ZFP
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STP5NK65ZFP

Manufacturer:: STMicroelectronics

Category:: FETs, MOSFETs

Package:: TO-220-3 Full Pack

Datasheet:: STP5NK65ZFP.pdf

Description:: MOSFET N-CH 650V 4.5A TO220FP

Quantity:: RFQ Add To RFQ list

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Inventory:5,565

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Product details

Overview

STP5NK65ZFP from STMicroelectronics is an N-channel 650 V, 1.5 Ω (typ), 4.5 A SuperMESH™ Power MOSFET in TO-220FP package with integrated gate-source Zener protection. It delivers high dv/dt immunity (4.5 V/ns), low gate charge (25 nC), and 100% avalanche tested ruggedness for high-voltage switching in offline SMPS and lighting ballasts.

For engineers reviewing the STP5NK65ZFP datasheet, STP5NK65ZFP pinout, STP5NK65ZFP application, or STP5NK65ZFP equivalent, key selection criteria include its 650 V V_DSS, 1.5 Ω R_DS(on) at 10 V_GS, 25 W P_TOT, built-in 30 V gate Zener, and TO-220FP thermal resistance of 5 °C/W junction-to-case.

Technical Context

This MOSFET employs ST's optimized strip-based SuperMESH™ layout to simultaneously minimize R_DS(on) and intrinsic capacitances (C_iss = 680 pF, C_oss = 80 pF) while maintaining robust 4.5 V/ns dv/dt capability under inductive switching. Its Zener-protected gate withstands ±2000 V HBM ESD and clamps transients up to 30 V.

The device features a fast source-drain diode (t_rr = 375 ns, Q_rr = 1.76 nC) and unclamped inductive avalanche rating (E_AS = 170 mJ at T_j = 25 °C). Safe operating area is defined up to 10 ms single-pulse at T_C = 25 °C with 4.5 A continuous current limit.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DSS	650 V - supports 400 V AC mains-derived DC bus with 60 % safety margin
R_DS(on) max	1.8 Ω @ V_GS = 10 V - ensures < 8.1 W conduction loss at 4.5 A
I_D cont	4.5 A @ T_C = 25 °C - defines maximum continuous power handling with heatsink
Q_g	25 nC - enables efficient 100 kHz+ switching with moderate gate driver strength
E_AS	170 mJ - sustains single-pulse inductive energy without failure during startup/fault
dv/dt	4.5 V/ns - prevents spurious turn-on in high-noise bridge or flyback topologies
V_GS(th)	3.0–4.5 V - compatible with standard 5 V or 15 V gate drive logic levels

Pinout & Package

TO-220FP package with insulated tab (2500 V RMS isolation), 3-pin configuration, and lead temperature rating of 300 °C for soldering. Thermal resistance junction-to-case is 5 °C/W.

Pin/Terminal	Circuit Role	Design Meaning
1 (Gate)	Control input	Receives gate drive signal; protected by integrated 30 V Zener diode
2 (Drain)	High-side switch node	Connected to high-voltage rail; electrically isolated from heatsink via plastic package
3 (Source)	Power return / reference	Serves as common return path for load current and gate drive reference

Key Features

Feature	Design Value
100% avalanche tested	Guarantees single-pulse E_AS = 170 mJ performance across production lot
Zener-protected gate	Integrated 30 V bidirectional Zener eliminates need for external gate clamp components
Low C_oss & C_rss	80 pF C_oss and 17 pF C_rss reduce switching losses and improve hard-switching efficiency
High dv/dt immunity	4.5 V/ns rating prevents false triggering in noisy high-side configurations
Improved ESD capability	2000 V HBM rating enables robust handling in automated assembly environments

Applications

LED Driver Ballast

AC-DC Adapter

Use Scenario: High-efficiency, non-isolated LED driver for street lighting using buck-boost topology.

IC Role / Device Role / Timing Role: Main switching transistor controlling energy transfer into LED string.

Use Value: 650 V rating accommodates 340 V DC bus from rectified 240 V AC; low R_DS(on) minimizes conduction loss at 4.5 A peak.

Use Scenario: Primary-side switch in universal-input (90–264 V AC) 30 W flyback adapter.

IC Role / Device Role / Timing Role: High-voltage power switch turning on/off transformer primary winding.

Use Value: Avalanche ruggedness absorbs leakage inductance spikes; Zener protection avoids gate overvoltage during transient events.

Industrial Motor Starter

UPS Inverter Stage

Use Scenario: Soft-start circuit for 1/4 HP induction motor in HVAC blower control.

IC Role / Device Role / Timing Role: High-side switch enabling controlled voltage ramp to motor windings.

Use Value: 4.5 A continuous rating supports 1.5× motor surge current; TO-220FP insulation allows direct mounting to grounded chassis.

Use Scenario: Half-bridge leg in online UPS inverter converting 360 V DC bus to 230 V AC output.

IC Role / Device Role / Timing Role: Low-side switching element in synchronous rectification or PWM inversion stage.

Use Value: Fast t_r/t_f (15/40 ns) enables clean 50 kHz switching; low Q_g reduces gate driver power demand.

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-voltage power switching applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
STP5NK60Z	600 V V_DSS, identical R_DS(on) (1.5 Ω), same TO-220FP package	Limited to 375 V AC mains systems; lower avalanche energy (120 mJ)	Select when system DC bus stays below 550 V and cost optimization is prioritized
FQP4N60	600 V V_DSS, higher R_DS(on) (2.2 Ω), no integrated gate Zener	Requires external gate protection; higher conduction loss at full load	Choose only if legacy design compatibility or distributor stock availability dictates substitution

Compared with STP5NK65ZFP, STP5NK60Z offers lower voltage margin but identical thermal and package behavior, while FQP4N60 lacks gate protection and increases conduction loss by ~47 %-making both less suitable for 230 V AC mains designs requiring robust transient immunity.

Availability

STP5NK65ZFP is available at Aetrix Electronics and suitable for offline SMPS, LED ballasts, industrial motor starters, and UPS inverters requiring stable component supply and long-term industrial lifecycle support.

Supply support for STP5NK65ZFP 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 microcontrollers, power devices, sensors, and analog ICs for industrial, automotive, and consumer markets.

The SuperMESH™ Power MOSFET product line targets high-voltage switching applications demanding high avalanche ruggedness, low gate charge, and enhanced dv/dt immunity-especially in cost-sensitive, space-constrained offline power supplies.

FAQ

Is STP5NK65ZFP still in active production?

No-STP5NK65ZFP is marked as Obsolete Product(s) in ST's official documentation (Doc ID 15565 Rev 1, April 2009). However, Aetrix Electronics maintains legacy inventory with full traceability and provides extended lifecycle support including obsolescence forecasting and cross-reference guidance for migration paths.

What is the maximum safe operating temperature for STP5NK65ZFP?

The absolute maximum junction temperature (T_j) is 150 °C, and the storage temperature range is –55 to 150 °C. For reliable operation, derate total power dissipation by 0.6 W/°C above 25 °C case temperature, with thermal resistance junction-to-case rated at 5 °C/W.

Can STP5NK65ZFP be used without an external gate resistor?

No-although the device has low gate charge (25 nC), an external gate resistor (e.g., 4.7 Ω as used in test circuits) is required to dampen ringing, control slew rate, and prevent oscillation. Omitting it risks gate overvoltage due to L_g × di/dt effects and may exceed the 30 V Zener clamping threshold.

Does the built-in Zener protect against negative gate voltage transients?

Yes-the gate-source Zener diode is bidirectional with ±30 V breakdown voltage (BVGSO = 30 V, I_GS = ±1 mA), providing symmetrical clamping for both positive and negative transients, which is critical in half-bridge configurations where shoot-through or Miller-induced negative spikes can occur.

STP5NK65ZFP Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: SuperMESH™

Package/Case:: TO-220-3 Full Pack

Packaging:: Tube

Product Status:: Obsolete

FET Type:: N-Channel

Technology:: MOSFET (Metal Oxide)

Drain to Source Voltage (Vdss):: 650 V

Current - Continuous Drain (Id) @ 25°C:: 4.5A (Tc)

Drive Voltage (Max Rds On, Min Rds On):: 10V

Rds On (Max) @ Id, Vgs:: 1.8Ohm @ 2.1A, 10V

Vgs(th) (Max) @ Id:: 4.5V @ 50µA

Gate Charge (Qg) (Max) @ Vgs:: 35 nC @ 10 V

Vgs (Max):: ±30V

Input Capacitance (Ciss) (Max) @ Vds:: 680 pF @ 25 V

FET Feature:: -

Power Dissipation (Max):: 25W (Tc)

Operating Temperature:: -55°C ~ 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-220FP

STP5NK65ZFP FAQ

1.How can I place an order for STP5NK65ZFP through Aetrix?

Please submit a Request for Quotation (RFQ) for STP5NK65ZFP on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for STP5NK65ZFP reliable?

The price and inventory of STP5NK65ZFP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STP5NK65ZFP is usually 5 days.

3.What payment methods are accepted for STP5NK65ZFP?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STP5NK65ZFP transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STP5NK65ZFP?

STP5NK65ZFP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STP5NK65ZFP order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for STP5NK65ZFP?

For technical support, including STP5NK65ZFP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STP5NK65ZFP requirements.

6.How does Aetrix verify that STP5NK65ZFP is sourced from the original manufacturer or authorized distributors?

All STP5NK65ZFP products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that STP5NK65ZFP meets industry standards.

7.What is the process for return or replacement of STP5NK65ZFP?

All STP5NK65ZFP units undergo pre-shipment inspection (PSI). If there is an issue with STP5NK65ZFP, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The STP5NK65ZFP part is unused and in its original packaging.

Return procedure for STP5NK65ZFP:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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