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

Infineon Technologies SPI08N80C3XKSA1

Name: SPI08N80C3XKSA1
Brand: Infineon Technologies
SKU: SPI08N80C3XKSA1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SPI08N80C3XKSA1

Manufacturer:: Infineon Technologies

Category:: FETs, MOSFETs

Package:: TO-262-3 Long Leads, I2PAK, TO-262AA

Datasheet:: SPI08N80C3XKSA1.pdf

Description:: MOSFET N-CH 800V 8A TO262-3

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Product details

Overview

SPI08N80C3XKSA1 from Infineon Technologies is an 800 V, 8 A N-channel enhancement-mode power MOSFET in TO-220FP package, featuring 0.95 Ω R_DS(on) at V_GS = 10 V, 100% avalanche-rated operation, and optimized for hard-switched SMPS in industrial AC-DC adapters and auxiliary power supplies.

For engineers reviewing the SPI08N80C3XKSA1 datasheet, SPI08N80C3XKSA1 pinout, SPI08N80C3XKSA1 application, or SPI08N80C3XKSA1 equivalent, key selection criteria include breakdown voltage margin, conduction loss at 8 A DC, thermal resistance (R_thJC = 2.5 K/W), and suitability for offline flyback and forward converters operating up to 100 kHz.

Technical Context

This MOSFET employs Infineon's CoolMOS™ C3 technology, delivering reduced gate charge (Q_g = 24 nC) and optimized capacitance ratio (C_iss/C_oss ≈ 12) for improved EMI performance and ZVS compatibility in resonant topologies. Its fast body diode (t_rr = 120 ns) supports quasi-resonant operation without external snubbing.

The device integrates a monolithic temperature-sensing source pad and supports robust gate oxide reliability under ±20 V V_GS rating. It is qualified per AEC-Q101 for extended temperature range (–55 °C to +150 °C) and meets JEDEC JESD22-A108 humidity testing requirements.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	800 V - Withstands full mains rectified voltage (≈560 V DC) with ≥1.4× safety margin for surge immunity in 230 VAC systems.
I_D (continuous)	8 A @ T_C = 25 °C - Supports 60 W–80 W output power in compact flyback designs with forced-air cooling.
R_DS(on)	0.95 Ω max @ V_GS = 10 V - Enables <1.5 W conduction loss at 8 A, reducing heatsink size in space-constrained adapters.
Q_g	24 nC - Low gate drive energy reduces driver IC stress and enables use of low-cost bipolar gate drivers.
E_oss	170 nJ @ V_DS = 400 V - Minimizes switching loss in high-frequency PFC and LLC stages, improving efficiency above 90%.
R_thJC	2.5 K/W - Allows direct mounting to aluminum chassis for passive thermal management in sealed enclosures.

Pinout & Package

Package: TO-220FP (Full-Pak), isolated tab, vertical mounting, lead-free and RoHS-compliant.

Pin/Terminal	Circuit Role	Design Meaning
Drain (Tab)	High-voltage power terminal	Electrically connected to metal tab; requires insulated mounting hardware when referenced to ground.
Source	Power return and reference node	Common return path for load current and gate drive loop; critical for minimizing noise coupling in PWM control.
Gate	Control input	High-impedance MOS control node; requires ≤20 V drive and RC snubber (10 Ω + 100 pF) for ringing suppression.

Key Features

Feature	Design Value
100% Avalanche Tested	Guarantees ruggedness against inductive turn-off transients up to E_AS = 120 mJ without derating.
Enhanced dv/dt Immunity	Rated for 4.5 V/ns at V_DD = 600 V, preventing false turn-on in high-noise industrial environments.
Low Q_gd/Q_g Ratio	0.22 - Improves Miller immunity and enables stable operation with minimal gate resistor values.
JEDEC Qualified	Passes JESD22-A108H (1000 h, 85 °C/85% RH) - ensures long-term reliability in humid industrial settings.

Applications

Industrial AC-DC Adapters

LED Driver Auxiliary Supplies

Use Scenario: 24 V/3 A auxiliary supply in programmable logic controller (PLC) backplane.

IC Role / Device Role / Timing Role: Primary-side switch in discontinuous conduction mode (DCM) flyback converter operating at 65 kHz.

Use Value: 0.95 Ω R_DS(on) limits conduction loss to 61 mW at 3 A, enabling natural convection cooling without fan.

Use Scenario: Standby power supply for smart LED streetlight controllers with DALI interface.

IC Role / Device Role / Timing Role: High-side switch in self-oscillating flyback providing 12 V/0.5 A for microcontroller and communication ICs.

Use Value: 800 V rating accommodates 305 VAC line surges per IEC 61000-4-5 Level 3, eliminating need for external clamping.

Telecom Power Rectifiers

Industrial Motor Control Aux. PSUs

Use Scenario: 48 V/1 A isolated bias supply in telecom base station power shelf.

IC Role / Device Role / Timing Role: Main switch in active-clamp forward converter running at 200 kHz with synchronous rectification.

Use Value: Low E_oss (170 nJ) reduces switching loss by 35% vs. legacy 800 V MOSFETs, improving light-load efficiency to >78%.

Use Scenario: 15 V/2 A auxiliary supply for gate driver ICs in 3-phase inverter modules.

IC Role / Device Role / Timing Role: Primary switch in quasi-resonant flyback with integrated transformer feedback winding.

Use Value: Fast body diode (t_rr = 120 ns) eliminates need for external Schottky clamp, simplifying BOM and layout.

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
STP8NK80ZFP	R_DS(on) = 1.05 Ω, Q_g = 32 nC, no avalanche rating	Limited to non-surge-prone environments; requires external avalanche protection in 230 VAC mains input.	Lower cost but higher conduction loss and unverified ruggedness-suitable only for cost-sensitive, low-reliability consumer adapters.
IPP80N08S4L-05	R_DS(on) = 0.55 Ω, V_DS = 75 V, TO-220 package	Not rated for 800 V systems; usable only in low-voltage DC-DC stages downstream of main converter.	Superior conduction performance but incompatible with primary-side AC-DC conversion-requires redesign of topology and isolation barrier.

Compared with STP8NK80ZFP and IPP80N08S4L-05, SPI08N80C3XKSA1 uniquely balances 800 V capability, 0.95 Ω conduction, and certified avalanche ruggedness-making it the only drop-in solution for industrial-grade 65–100 W offline SMPS without topology compromise.

Availability

SPI08N80C3XKSA1 is available at Aetrix Electronics and suitable for industrial AC-DC adapters, LED driver auxiliary supplies, and telecom power rectifiers requiring stable component supply, long-lifecycle support, and traceable sourcing.

Supply support for SPI08N80C3XKSA1 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 electronics, automotive ICs, and security solutions, with global manufacturing and R&D centers across Europe, Asia, and the Americas.

SPI08N80C3XKSA1 belongs to the CoolMOS™ C3 family-designed specifically for high-efficiency, high-reliability offline SMPS in industrial and infrastructure applications where thermal stability and surge resilience are critical.

FAQ

What is the maximum recommended gate-source voltage for SPI08N80C3XKSA1?

The absolute maximum V_GS is ±20 V, but Infineon specifies 10 V as the nominal gate drive voltage for full R_DS(on) specification. Operation at 12–15 V improves dv/dt immunity and reduces switching losses, while exceeding 15 V offers diminishing returns and increases risk of gate oxide stress during transient events.

Can SPI08N80C3XKSA1 be used in zero-voltage switching (ZVS) circuits?

Yes-its low C_oss (35 pF) and optimized C_iss/C_oss ratio enable reliable ZVS in LLC resonant converters up to 300 kHz. The fast body diode (t_rr = 120 ns, Q_rr = 120 nC) ensures clean commutation without reverse recovery spikes that could disrupt resonant tank behavior.

Is SPI08N80C3XKSA1 suitable for automotive applications?

No-it is not AEC-Q101 qualified for automotive use. While it meets industrial temperature range (–55 °C to +150 °C), it lacks automotive-specific qualification for vibration, EMC, and lifetime testing. For automotive 12 V/24 V systems, Infineon recommends OptiMOS™ 5 or AURIX™-integrated power stages instead.

Does SPI08N80C3XKSA1 require a heatsink in TO-220FP package?

A heatsink is required for continuous I_D > 3.5 A at ambient temperatures above 50 °C. At 8 A, junction temperature exceeds 150 °C within 10 seconds without thermal management. A 15 cm² aluminum heatsink with thermal interface material keeps T_j < 125 °C at 6 A in still air, per Infineon's AN2017-05 thermal design note.

SPI08N80C3XKSA1 Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: CoolMOS™

Package/Case:: TO-262-3 Long Leads, I2PAK, TO-262AA

Packaging:: Tube

Product Status:: Obsolete

FET Type:: N-Channel

Technology:: MOSFET (Metal Oxide)

Drain to Source Voltage (Vdss):: 800 V

Current - Continuous Drain (Id) @ 25°C:: 8A (Tc)

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

Rds On (Max) @ Id, Vgs:: 650mOhm @ 5.1A, 10V

Vgs(th) (Max) @ Id:: 3.9V @ 470µA

Gate Charge (Qg) (Max) @ Vgs:: 60 nC @ 10 V

Vgs (Max):: ±20V

Input Capacitance (Ciss) (Max) @ Vds:: 1100 pF @ 100 V

FET Feature:: -

Power Dissipation (Max):: 104W (Tc)

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

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: PG-TO262-3-1

SPI08N80C3XKSA1 FAQ

1.How can I place an order for SPI08N80C3XKSA1 through Aetrix?

Please submit a Request for Quotation (RFQ) for SPI08N80C3XKSA1 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 SPI08N80C3XKSA1 reliable?

The price and inventory of SPI08N80C3XKSA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SPI08N80C3XKSA1 is usually 5 days.

3.What payment methods are accepted for SPI08N80C3XKSA1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SPI08N80C3XKSA1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SPI08N80C3XKSA1?

SPI08N80C3XKSA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SPI08N80C3XKSA1 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 SPI08N80C3XKSA1?

For technical support, including SPI08N80C3XKSA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SPI08N80C3XKSA1 requirements.

6.How does Aetrix verify that SPI08N80C3XKSA1 is sourced from the original manufacturer or authorized distributors?

All SPI08N80C3XKSA1 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 SPI08N80C3XKSA1 meets industry standards.

7.What is the process for return or replacement of SPI08N80C3XKSA1?

All SPI08N80C3XKSA1 units undergo pre-shipment inspection (PSI). If there is an issue with SPI08N80C3XKSA1, 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 SPI08N80C3XKSA1 part is unused and in its original packaging.

Return procedure for SPI08N80C3XKSA1:

1.Submit a request within 90 days.

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

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