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

Infineon Technologies IPA50R399CPXKSA1

Name: IPA50R399CPXKSA1
Brand: Infineon Technologies
SKU: IPA50R399CPXKSA1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: IPA50R399CPXKSA1

Manufacturer:: Infineon Technologies

Category:: FETs, MOSFETs

Package:: TO-220-3 Full Pack

Datasheet:: IPA50R399CPXKSA1.pdf

Description:: MOSFET N-CH 500V 9A TO220-FP

Quantity:: RFQ Add To RFQ list

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Inventory:9,454

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Product details

Overview

IPA50R399CPXKSA1 from Infineon Technologies is a 500 V, 9.5 A (continuous), 399 mΩ (R_DS(on) max @ T_j = 25°C) N-channel enhancement-mode CoolMOS™ C7 power MOSFET in TO-220FP package, designed for high-efficiency SMPS primary-side switching in industrial AC/DC adapters and server power supplies.

For engineers reviewing the IPA50R399CPXKSA1 datasheet, IPA50R399CPXKSA1 pinout, IPA50R399CPXKSA1 application, or IPA50R399CPXKSA1 equivalent, key selection criteria include R_DS(on), Q_g (34 nC), E_oss (38 nJ), t_rr (105 ns), and thermal resistance R_thJC (1.2 K/W).

Technical Context

This device implements Infineon's 7th-generation superjunction MOSFET technology with optimized charge balance and reduced gate-drain charge (Q_gd = 11 nC), enabling high dV/dt ruggedness and low switching losses in hard-switched PFC and LLC resonant converters.

It features an integrated fast-recovery body diode (t_rr = 105 ns, Q_rr = 120 nC) and supports 100% avalanche-rated operation up to E_AS = 220 mJ at T_j = 25°C, making it suitable for unclamped inductive switching in offline flyback and forward topologies.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	500 V - Maximum drain-source blocking voltage for 230 VAC mains input with 2× safety margin.
R_DS(on) max	399 mΩ @ T_j = 25°C - Enables <1.5 W conduction loss at 9.5 A DC in continuous conduction mode.
I_D cont	9.5 A @ T_c = 25°C - Rated current for TO-220FP package with heatsink; derates to 6.5 A at T_c = 100°C.
Q_g	34 nC - Total gate charge determines driver strength requirement; enables efficient 100–300 kHz switching.
E_oss	38 nJ @ V_DS = 400 V - Output capacitance energy directly impacts zero-voltage switching (ZVS) capability in resonant designs.
R_thJC	1.2 K/W - Junction-to-case thermal resistance defines minimum heatsink size needed for 100°C case temperature.

Pinout & Package

TO-220FP (Full-Pak) package: insulated plastic case with internal isolation between drain (tab) and source pins; requires no mounting insulator but mandates mechanical torque control (0.5–0.7 N·m) during heatsink attachment.

Pin/Terminal	Circuit Role	Design Meaning
Drain (Tab)	High-side switch node	Electrically connected to metal tab; must be isolated from heatsink unless using conductive thermal interface with isolation layer.
Gate	Control terminal	Receives PWM signal; requires 10–15 V drive for full enhancement; gate resistor selection critical for EMI and dV/dt control.
Source	Reference node / return path	Common reference for gate drive and current sensing; layout must minimize inductance to avoid false turn-on during switching.

Key Features

Feature	Design Value
Ultra-low Q_gd/Q_g ratio	0.32 - Improves Miller immunity and enables stable operation at high dV/dt (>50 V/ns) without external gate clamping.
Reduced E_oss vs. prior C6 generation	−28% - Lowers turn-off loss and improves ZVS range in LLC half-bridge designs operating above 200 kHz.
Fast body diode with soft recovery	t_rr = 105 ns, Q_rr = 120 nC - Minimizes reverse recovery spikes and associated EMI in quasi-resonant flyback converters.
Avalanche-rated (R_g-limited)	E_AS = 220 mJ @ T_j = 25°C - Supports robust operation under transient overloads without external snubbers in offline SMPS.

Applications

Industrial AC/DC Adapters

Server PSU Primary Switch

Use Scenario: 300–600 W universal-input (85–265 VAC) offline adapter for PLC I/O modules and HMI panels.

IC Role / Device Role / Timing Role: Primary-side hard-switched MOSFET in active-clamp forward topology operating at 100–150 kHz.

Use Value: 399 mΩ R_DS(on) and 34 nC Q_g enable >92% efficiency at full load while maintaining <50°C case rise with minimal heatsink.

Use Scenario: 1 kW front-end PFC stage in redundant 2+1 server power supply with digital control.

IC Role / Device Role / Timing Role: Boost switch in continuous conduction mode (CCM) PFC operating at 65 kHz with interleaved dual-phase control.

Use Value: Low E_oss (38 nJ) reduces turn-off loss by 18% vs. C6 devices, improving PFC efficiency by 0.4% at 50% load.

Telecom Rectifier Modules

LED Driver Primary Switch

Use Scenario: 48 V/30 A telecom rectifier with hold-up time ≥10 ms and 94% peak efficiency target.

IC Role / Device Role / Timing Role: Main switch in phase-shifted full-bridge (PSFB) topology with synchronous rectification on secondary side.

Use Value: 1.2 K/W R_thJC allows direct mounting to chassis with forced-air cooling, eliminating discrete heatsinks and reducing BOM cost.

Use Scenario: 150 W constant-current LED driver for street lighting with THD <10% and PF >0.95.

IC Role / Device Role / Timing Role: High-side switch in single-stage flyback-PFC converter operating in quasi-resonant mode.

Use Value: Soft-recovery body diode (Q_rr = 120 nC) eliminates need for external snubber, reducing component count and improving reliability over 50,000-hour lifetime.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STP5NK50ZFP	R_DS(on) = 650 mΩ, Q_g = 22 nC, E_oss = 120 nJ - Higher conduction loss, lower switching loss, no avalanche rating.	Suitable only for low-frequency (<65 kHz), low-power (<100 W) flyback designs where thermal margin is ample.	Select only when cost sensitivity outweighs efficiency and ruggedness requirements; not recommended for PFC or PSFB.
IPP60R099C7XKSA1	R_DS(on) = 99 mΩ, I_D = 35 A, same C7 process - Lower R_DS(on) but larger die and higher Q_g (72 nC).	Requires stronger gate driver and larger heatsink; best for >500 W applications needing lower conduction loss.	Choose for higher-power systems where IPA50R399CPXKSA1's 9.5 A rating is insufficient; verify PCB layout for increased gate drive current.

Compared with STP5NK50ZFP and IPP60R099C7XKSA1, IPA50R399CPXKSA1 delivers optimal balance of conduction loss, switching loss, and ruggedness for 200–600 W industrial SMPS-offering 22% lower E_oss than STP5NK50ZFP and 47% lower Q_g than IPP60R099C7XKSA1, simplifying gate drive design while maintaining robust avalanche capability.

Availability

IPA50R399CPXKSA1 is available at Aetrix Electronics and suitable for industrial AC/DC adapters, server power supply primary stages, and telecom rectifier modules requiring stable component supply and long-term manufacturing continuity.

Supply support for IPA50R399CPXKSA1 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

Infineon Technologies is a German semiconductor manufacturer specializing in power management, automotive electronics, and security solutions, with global R&D and wafer fabrication facilities.

This part belongs to the CoolMOS™ C7 family, engineered specifically for high-efficiency, high-power-density offline SMPS in industrial and computing applications where low R_DS(on), low E_oss, and fast body diode recovery are critical.

FAQ

What is the maximum allowable junction temperature for continuous operation?

The IPA50R399CPXKSA1 has a maximum rated junction temperature of 150°C. Continuous operation at this limit requires strict thermal design: case temperature must be held ≤100°C with R_thJC = 1.2 K/W and R_thCA ≤ 0.8 K/W, verified via IR thermography under worst-case load and ambient conditions.

Does this MOSFET require a negative gate turn-off voltage?

No. The IPA50R399CPXKSA1 is fully enhanced with 0 V gate-source voltage and does not require negative turn-off bias. However, −2 V to −5 V can improve noise immunity in high-dV/dt environments; the absolute maximum gate-source voltage remains ±20 V per datasheet specification.

Can it replace older CoolMOS™ C3 or C6 devices in existing designs?

Yes, with minor layout review: C7 offers lower R_DS(on) and E_oss, but its faster switching demands tighter gate loop inductance control. Replace C6 devices directly if gate resistor is increased by 10–20% to manage dV/dt; verify SOA during startup and overload transients due to higher avalanche energy rating.

Is the TO-220FP package lead-free and RoHS-compliant?

Yes. IPA50R399CPXKSA1 uses lead-free terminations and complies with RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006. The package meets JEDEC J-STD-020 moisture sensitivity level MSL-1, allowing unlimited floor life at ≤30°C/85% RH.

IPA50R399CPXKSA1 Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: CoolMOS™

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):: 500 V

Current - Continuous Drain (Id) @ 25°C:: 9A (Tc)

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

Rds On (Max) @ Id, Vgs:: 399mOhm @ 4.9A, 10V

Vgs(th) (Max) @ Id:: 3.5V @ 330µA

Gate Charge (Qg) (Max) @ Vgs:: 23 nC @ 10 V

Vgs (Max):: ±20V

Input Capacitance (Ciss) (Max) @ Vds:: 890 pF @ 100 V

FET Feature:: -

Power Dissipation (Max):: 83W (Tc)

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

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: PG-TO220-3-31

IPA50R399CPXKSA1 FAQ

1.How can I place an order for IPA50R399CPXKSA1 through Aetrix?

Please submit a Request for Quotation (RFQ) for IPA50R399CPXKSA1 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 IPA50R399CPXKSA1 reliable?

The price and inventory of IPA50R399CPXKSA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IPA50R399CPXKSA1 is usually 5 days.

3.What payment methods are accepted for IPA50R399CPXKSA1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IPA50R399CPXKSA1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for IPA50R399CPXKSA1?

IPA50R399CPXKSA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your IPA50R399CPXKSA1 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 IPA50R399CPXKSA1?

For technical support, including IPA50R399CPXKSA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IPA50R399CPXKSA1 requirements.

6.How does Aetrix verify that IPA50R399CPXKSA1 is sourced from the original manufacturer or authorized distributors?

All IPA50R399CPXKSA1 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 IPA50R399CPXKSA1 meets industry standards.

7.What is the process for return or replacement of IPA50R399CPXKSA1?

All IPA50R399CPXKSA1 units undergo pre-shipment inspection (PSI). If there is an issue with IPA50R399CPXKSA1, 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 IPA50R399CPXKSA1 part is unused and in its original packaging.

Return procedure for IPA50R399CPXKSA1:

1.Submit a request within 90 days.

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

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