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

STMicroelectronics STP7N52K3

Name: STP7N52K3
Brand: STMicroelectronics
SKU: STP7N52K3
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STP7N52K3

Manufacturer:: STMicroelectronics

Category:: FETs, MOSFETs

Package:: TO-220-3

Datasheet:: STP7N52K3.pdf

Description:: MOSFET N-CH 525V 6A TO220AB

Quantity:: RFQ Add To RFQ list

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Product details

Overview

STP7N52K3 from STMicroelectronics is an N-channel 525 V, 0.85 Ω max, 6 A MDmesh™ K3 Power MOSFET in TO-220 package, featuring 100% avalanche testing, 12 V/ns dv/dt capability, and integrated Zener-protected gate. It serves as a high-voltage switching device in offline SMPS primary-side circuits, PFC stages, and industrial AC-DC converters.

For engineers reviewing the STP7N52K3 datasheet, STP7N52K3 pinout, STP7N52K3 application, or STP7N52K3 equivalent, key selection criteria include avalanche energy rating (100 mJ), low Coss(tr) (53 pF), fast diode recovery (220 ns trr at 25 °C), RDS(on) temperature stability, and TO-220 thermal resistance (1.39 °C/W junction-to-case).

Technical Context

This MOSFET employs ST's MDmesh™ K3 vertical structure optimized for high-voltage switching with reduced specific on-resistance and minimized output capacitance. Its Zener-protected gate enables robust ESD immunity (2.5 kV HBM) without external clamping.

The device delivers enhanced dynamic performance via low Crss (13 pF), low Qgd/Qg ratio (21/33 nC), and improved diode reverse recovery (Qrr = 1.8 µC, IRRM = 16 A), enabling high-frequency operation in hard-switched topologies while maintaining SOA integrity up to 150 °C junction temperature.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	525 V - Withstands full mains rectified voltage in universal-input 85–265 V_AC SMPS designs.
R_DS(on) max	0.85 Ω at V_GS = 10 V, I_D = 3 A - Enables <1.5 W conduction loss at 6 A DC, supporting high-efficiency PFC stages.
E_AS	100 mJ single-pulse avalanche energy - Supports unclamped inductive switching in flyback and resonant converters without external snubbers.
C_oss(tr)	53 pF - Low stored output capacitance reduces turn-off losses and improves light-load efficiency in QR and LLC topologies.
t_rr	220 ns at T_j = 25 °C - Fast body diode recovery minimizes commutation losses and ringing in synchronous rectification and half-bridge configurations.
dv/dt	12 V/ns - High intrinsic noise immunity prevents spurious turn-on in high-dV/dt environments like motor drives and inverters.
Q_g	33 nC - Enables efficient gate driving with standard 1-A peak drivers at 100 kHz switching frequency.

Pinout & Package

STP7N52K3 uses TO-220 type A package with isolated tab (drain-connected). Thermal resistance is 1.39 °C/W junction-to-case, requiring mechanical mounting to heatsink via insulating washer or pad.

Pin/Terminal	Circuit Role	Design Meaning
Tab (Drain)	High-voltage power output node	Electrically connected to drain; must be insulated from chassis ground unless referenced to system ground; primary thermal path to heatsink.
Pin 1 (Gate)	Control input	Receives 10 V logic-level drive; protected by integrated 30 V Zener; requires <3.5 Ω series gate resistor to damp oscillation.
Pin 2 (Source)	Power return reference	Serves as local ground reference for gate driver; carries full load current; layout must minimize inductance to reduce switching overshoot.
Pin 3 (Drain)	High-side power terminal	Redundant drain connection to tab; used only when tab isolation is not required; otherwise left unconnected or tied to tab.

Key Features

Feature	Design Value
100% avalanche tested	Guarantees robustness under transient overvoltage conditions without derating, eliminating need for external avalanche protection circuits.
Extremely high dv/dt capability	12 V/ns rating ensures reliable operation in noisy high-speed switching nodes, reducing risk of false triggering in bridge-leg configurations.
Very low intrinsic capacitance	Ciss = 870 pF, Coss = 70 pF - Minimizes capacitive coupling and switching losses, enabling >200 kHz operation in critical-conduction-mode PFC.
Improved diode reverse recovery	Qrr = 1.8 µC, trr = 220 ns - Reduces diode-induced voltage spikes and EMI during turn-off, easing EMI filter design in Class D audio and SMPS.
Zener-protected gate	Integrated 30 V bidirectional Zener clamps gate-source voltage - Eliminates external TVS requirement and simplifies gate-drive circuitry.

Applications

Industrial AC-DC Power Supplies

Server & Telecom Rectifiers

Use Scenario: Primary-side switch in 500–1000 W active-clamp forward or LLC resonant converter.

IC Role / Device Role / Timing Role: High-voltage power switch handling 400 V DC bus, operating at 100–300 kHz with zero-voltage switching.

Use Value: Low Coss(tr) and fast diode recovery enable tight regulation and <94% efficiency across line/load range without auxiliary snubbers.

Use Scenario: Boost PFC stage in 3 kW telecom rectifier with universal AC input.

IC Role / Device Role / Timing Role: Critical-conduction-mode (CrCM) switch managing 10 A peak inductor current at 65 kHz.

Use Value: 0.85 Ω RDS(on) and stable on-resistance over temperature ensure consistent conduction loss and thermal margin at 70 °C ambient.

Motor Drive Inverters

LED Streetlight Drivers

Use Scenario: Half-bridge high-side switch in 7.5 kW HVAC inverter feeding 3-phase induction motor.

IC Role / Device Role / Timing Role: Hard-switched 525 V blocking element subjected to repetitive 12 V/ns voltage transients during PWM commutation.

Use Value: 100% avalanche-tested construction and 12 V/ns dv/dt rating prevent failure during motor stall or short-circuit events.

Use Scenario: Buck-boost LED driver for 150 W streetlight with 30–55 V output and 3 A constant current.

IC Role / Device Role / Timing Role: Primary-side switch in isolated flyback topology operating at 60 kHz with 85–265 V_AC input.

Use Value: Integrated gate Zener and 2.5 kV HBM ESD rating ensure reliability in field-deployed outdoor lighting exposed to lightning-induced surges.

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
STP8N52K3	Higher ID (8 A), higher RDS(on) (0.65 Ω typ.), same VDS and package	Better suited for higher-current PFC where thermal headroom is constrained	Select when average load current exceeds 6.5 A and board space allows larger heatsink
IPP60R099C7	650 V rating, lower RDS(on) (0.099 Ω), TO-220FP package, no integrated Zener	Requires external gate protection; better for ultra-high-efficiency server PSUs	Choose only if gate drive includes discrete Zener clamping and 650 V margin is mandatory for future-proofing

Compared with STP8N52K3 and IPP60R099C7, STP7N52K3 offers optimal balance of avalanche ruggedness, gate protection integration, and thermal performance in cost-sensitive industrial power supplies-making it preferred where reliability under transient stress outweighs marginal conduction loss reduction.

Availability

STP7N52K3 is available at Aetrix Electronics and suitable for industrial AC-DC power supplies, telecom rectifiers, and motor drive inverters requiring stable component supply and long-term manufacturing continuity.

Supply support for STP7N52K3 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.

STP7N52K3 belongs to the MDmesh™ K3 family-engineered specifically for high-voltage, high-efficiency switching in offline power conversion, emphasizing avalanche robustness, low dynamic losses, and gate protection integration.

FAQ

Is STP7N52K3 pin-compatible with STD7N52K3?

No. STP7N52K3 uses TO-220 package with three pins and isolated drain tab, while STD7N52K3 uses DPAK (TO-252) surface-mount package with three gull-wing leads and non-isolated drain pad. Mechanical mounting, thermal path, and PCB footprint differ fundamentally-direct replacement requires board redesign.

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

The maximum continuous drain current is 3.8 A at TC = 100 °C, as specified in Table 1 of DS5889 Rev 6. This derating reflects thermal limits of the TO-220 package; operation above this current requires forced-air cooling or heatsink optimization to maintain TJ ≤ 150 °C.

Does STP7N52K3 require external gate protection?

No. The device integrates bidirectional gate-source Zener diodes rated at 30 V breakdown, providing inherent protection against ESD (2.5 kV HBM) and gate overvoltage transients-eliminating need for external TVS diodes in most industrial applications per IEC 61000-4-2 Level 3.

Can STP7N52K3 be used in synchronous rectification topologies?

No. STP7N52K3 is an N-channel high-side switch intended for primary-side switching. Its body diode recovery characteristics (trr = 220 ns) are optimized for hard-switched freewheeling-not low-loss synchronous rectification, which requires dedicated low-VF, ultrafast trench FETs with reverse recovery times <50 ns.

STP7N52K3 Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: SuperMESH3™

Package/Case:: TO-220-3

Packaging:: Tube

Product Status:: Obsolete

FET Type:: N-Channel

Technology:: MOSFET (Metal Oxide)

Drain to Source Voltage (Vdss):: 525 V

Current - Continuous Drain (Id) @ 25°C:: 6A (Tc)

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

Rds On (Max) @ Id, Vgs:: 980mOhm @ 3.1A, 10V

Vgs(th) (Max) @ Id:: 4.5V @ 50µA

Gate Charge (Qg) (Max) @ Vgs:: 34 nC @ 10 V

Vgs (Max):: ±30V

Input Capacitance (Ciss) (Max) @ Vds:: 737 pF @ 100 V

FET Feature:: -

Power Dissipation (Max):: 90W (Tc)

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-220

STP7N52K3 FAQ

1.How can I place an order for STP7N52K3 through Aetrix?

Please submit a Request for Quotation (RFQ) for STP7N52K3 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 STP7N52K3 reliable?

The price and inventory of STP7N52K3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STP7N52K3 is usually 5 days.

3.What payment methods are accepted for STP7N52K3?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STP7N52K3 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STP7N52K3?

STP7N52K3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STP7N52K3 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 STP7N52K3?

For technical support, including STP7N52K3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STP7N52K3 requirements.

6.How does Aetrix verify that STP7N52K3 is sourced from the original manufacturer or authorized distributors?

All STP7N52K3 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 STP7N52K3 meets industry standards.

7.What is the process for return or replacement of STP7N52K3?

All STP7N52K3 units undergo pre-shipment inspection (PSI). If there is an issue with STP7N52K3, 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 STP7N52K3 part is unused and in its original packaging.

Return procedure for STP7N52K3:

1.Submit a request within 90 days.

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

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