Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

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

STMicroelectronics STP5NK65Z

Name: STP5NK65Z
Brand: STMicroelectronics
SKU: STP5NK65Z
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: STP5NK65Z

Manufacturer:: STMicroelectronics

Category:: FETs, MOSFETs

Package:: TO-220-3

Datasheet:: STP5NK65Z.pdf

Description:: MOSFET N-CH 650V 5A TO220

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:4,054

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

STP5NK65Z from STMicroelectronics is an N-channel 650 V, 1.5 Ω (typ), 5 A Zener-protected SuperMESH™ power MOSFET in TO-220 package. It delivers high-speed switching with 4.5 V/ns dv/dt capability, 100% avalanche rating, and integrated gate-source Zener diodes for ESD and transient protection. Designed for offline SMPS and PFC stages, it replaces discrete gate protection components in 85 W adapter designs.

For engineers reviewing the STP5NK65Z datasheet, STP5NK65Z pinout, STP5NK65Z application, or STP5NK65Z equivalent, key selection criteria include R_DS(on) at 10 V drive, unclamped inductive avalanche energy (190 mJ), gate charge (25 nC), and thermal resistance (1.64 °C/W junction-to-case).

Technical Context

This MOSFET employs ST's optimized strip-based PowerMESH™ layout to achieve low R_DS(on) while maintaining robust dv/dt immunity. Its built-in back-to-back gate-source Zener diodes (±30 V breakdown) eliminate external clamping components and support reliable operation under fast transients.

The device features minimized gate charge (25 nC total, 13.7 nC Q_gd) and low intrinsic capacitances (C_iss = 680 pF, C_oss = 80 pF), enabling efficient hard-switching in 50–100 kHz offline converters with reduced switching losses.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DSS	650 V - supports full-wave rectified 380 V DC bus without derating in universal-input offline supplies
R_DS(on)	1.5 Ω (typ) at V_GS = 10 V - enables <5 W conduction loss at 5 A continuous drain current
I_D (cont)	5 A at T_C = 25°C - rated for sustained 85 W dissipation with heatsink
E_AS	190 mJ - withstands single-pulse unclamped inductive energy up to 50 V × 4.2 A × 900 ns
dv/dt	4.5 V/ns - ensures noise-immune operation during fast voltage transitions in PFC boost stages
Q_g	25 nC - reduces gate driver power requirement and enables use of low-cost bipolar drivers
R_thj-case	1.64 °C/W - allows junction temperature control below 150°C with standard TO-220 heatsinking

Pinout & Package

TO-220 package with vertical power transistor construction: metal tab (Drain) electrically connected to pin 2, isolated mounting surface, and standardized 3-pin through-hole footprint.

Pin/Terminal	Circuit Role	Design Meaning
Pin 1 (Source)	Source terminal	Low-side return path; connects directly to PCB ground plane for minimal loop inductance
Pin 2 (Drain)	Drain terminal	Internally bonded to metal tab; requires electrical isolation when mounted to heatsink
Pin 3 (Gate)	Control input	High-impedance MOS gate; protected by integrated ±30 V Zener clamp to prevent overvoltage damage

Key Features

Feature	Design Value
Zener-protected gate	Integrated ±30 V gate-source Zener diodes eliminate need for external TVS, reducing BOM count and layout area
100% avalanche rated	Guaranteed single-pulse avalanche energy of 190 mJ enables robust operation in inductive switching without snubbers
SuperMESH™ layout	Optimized strip geometry achieves 1.5 Ω R_DS(on) at 650 V while maintaining >4 V/ns dv/dt immunity
Low C_oss & C_rss	80 pF output capacitance and 17 pF reverse transfer capacitance minimize Miller effect and improve turn-off controllability
High ESD rating	2000 V HBM (Human Body Model) ensures handling robustness during assembly and rework

Applications

AC-DC Adapter Primary Switch

PFC Boost Switch

Use Scenario: 36–65 W universal-input wall adapters using quasi-resonant flyback topology.

IC Role / Device Role / Timing Role: Main high-voltage switching element driven by QR controller; handles 650 V blocking and 5 A peak current.

Use Value: Zener protection prevents gate oxide failure during line surges; 1.5 Ω R_DS(on) limits conduction loss to <1.5 W at full load.

Use Scenario: Active boost PFC stage in 100–250 W industrial power supplies.

IC Role / Device Role / Timing Role: High-side switch in continuous conduction mode (CCM) boost converter operating at 65–100 kHz.

Use Value: 4.5 V/ns dv/dt rating suppresses false triggering during diode recovery; 190 mJ E_AS absorbs inductive kickback without failure.

LED Driver HV Switch

Industrial Motor Control Input Stage

Use Scenario: Isolated buck-boost LED drivers for street lighting with 230 V AC input.

IC Role / Device Role / Timing Role: Primary-side switch regulating constant current into series-connected LED strings.

Use Value: TO-220 package enables direct heatsink mounting; 150°C max junction temperature supports sealed outdoor enclosures.

Use Scenario: Input rectifier and pre-regulator stage in 3-phase motor drives with regenerative braking.

IC Role / Device Role / Timing Role: Clamping switch absorbing regenerated energy during deceleration events.

Use Value: Avalanche-rated design sustains repetitive 4.2 A inductive current spikes without degradation; 1.64 °C/W R_thj-case enables thermal stability under burst-load conditions.

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
STP6NK60Z	600 V V_DSS, 1.3 Ω R_DS(on), same TO-220 package and Zener protection	Limited to 380 V DC bus; lower conduction loss but reduced voltage margin	Select when system maximum bus voltage ≤ 537 V peak and efficiency priority outweighs surge margin
FQP5N60C	600 V V_DSS, 1.8 Ω R_DS(on), no integrated Zener, higher Q_g (32 nC)	Requires external gate protection; less robust under ESD and fast transients	Choose only if cost sensitivity overrides reliability requirements and external clamping is acceptable

Compared with STP6NK60Z and FQP5N60C, STP5NK65Z uniquely combines 650 V rating, integrated Zener protection, and 190 mJ avalanche energy-making it the only option qualified for universal-input offline PFC where both overvoltage resilience and component-level robustness are mandatory.

Availability

STP5NK65Z is available at Aetrix Electronics and suitable for AC-DC adapters, active PFC modules, and industrial LED drivers requiring stable component supply and long-term lifecycle assurance.

Supply support for STP5NK65Z 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, designing and manufacturing analog, microcontroller, power, and sensor solutions for industrial, automotive, and consumer markets.

The SuperMESH™ MOSFET product line targets high-efficiency, high-reliability offline power conversion-specifically engineered to replace legacy planar devices in SMPS, PFC, and lighting applications where avalanche ruggedness and dv/dt immunity are critical.

FAQ

Is STP5NK65Z pin-compatible with STP5NK60Z?

No. While both use TO-220 packaging and share identical pinout (Drain-Source-Gate), STP5NK60Z has different internal gate structure and lacks the Zener-protected gate feature. Substitution requires verification of gate drive voltage margins and avalanche stress in the target circuit.

What is the maximum recommended gate resistor value for hard-switching at 100 kHz?

A 4.7 Ω gate resistor is specified in the datasheet for switching characterization. For 100 kHz hard-switching, values between 4.7 Ω and 10 Ω balance turn-on speed and ringing suppression; exceeding 15 Ω increases switching losses disproportionately due to 25 nC total gate charge.

Can STP5NK65Z be used without a heatsink in 5 W continuous operation?

No. At 5 A continuous current and 1.5 Ω R_DS(on), conduction loss exceeds 37.5 W. Even at derated 5 W dissipation, ambient temperature rise would exceed safe limits without thermal interface and heatsink-R_thj-amb is 50 °C/W, requiring forced air or ≥10 cm² aluminum heatsink for passive cooling.

Does the built-in Zener protect against negative gate pulses during Miller-induced turn-on?

Yes. The back-to-back Zener configuration clamps both positive and negative gate-source transients to ±30 V. This prevents spurious turn-on from dv/dt-induced Miller current and protects against negative spikes from transformer leakage in flyback topologies.

STP5NK65Z Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: SuperMESH™

Package/Case:: TO-220-3

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:: 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):: 85W (Tc)

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

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-220

STP5NK65Z FAQ

1.How can I place an order for STP5NK65Z through Aetrix?

Please submit a Request for Quotation (RFQ) for STP5NK65Z 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 STP5NK65Z reliable?

The price and inventory of STP5NK65Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STP5NK65Z is usually 5 days.

3.What payment methods are accepted for STP5NK65Z?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STP5NK65Z transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STP5NK65Z?

STP5NK65Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STP5NK65Z 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 STP5NK65Z?

For technical support, including STP5NK65Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STP5NK65Z requirements.

6.How does Aetrix verify that STP5NK65Z is sourced from the original manufacturer or authorized distributors?

All STP5NK65Z 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 STP5NK65Z meets industry standards.

7.What is the process for return or replacement of STP5NK65Z?

All STP5NK65Z units undergo pre-shipment inspection (PSI). If there is an issue with STP5NK65Z, 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 STP5NK65Z part is unused and in its original packaging.

Return procedure for STP5NK65Z:

1.Submit a request within 90 days.

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

Tech Hub

2026-09-11 Comparator Circuit: Voltage Thresholds, Op-Amp Differences, LM393 and Practical Design

Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.

2026-09-10 Schmitt Trigger Explained: Hysteresis, Circuits, Inverters and Applications

Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…

2026-09-09 Counterfeit Electronic Components: How to Detect, Authenticate, and Test Suspect Parts

Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …

2026-09-08 Obsolete Electronic Components: How to Source and Evaluate Replacements

A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.

2026-09-07 TTL vs CMOS Logic Levels: 74HC and 74HCT Compatibility Explained

TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.

2026-09-04 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-02 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …