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

Infineon Technologies IRF450

Name: IRF450
Brand: Infineon Technologies
SKU: IRF450
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: IRF450

Manufacturer:: Infineon Technologies

Category:: FETs, MOSFETs

Package:: TO-204AA, TO-3

Datasheet:: IRF450.pdf

Description:: MOSFET N-CH 500V 12A TO204AA

Quantity:: RFQ Add To RFQ list

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Inventory:6,123

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Product details

Overview

IRF450 from International Rectifier is an N-channel enhancement-mode silicon power MOSFET in TO-220 package, rated for 500V V_DSS, 14A I_D (continuous), and 0.4Ω R_DS(on) at V_GS = 10V. It operates as a high-voltage switching element in offline SMPS, motor drive inverters, and DC-DC converters.

For engineers reviewing the IRF450 datasheet, IRF450 pinout, IRF450 application, or IRF450 equivalent, key selection criteria include its 500V blocking capability, 14A thermal-current limit, gate charge of 72nC, and suitability for hard-switched flyback and forward converter topologies.

Technical Context

The IRF450 uses planar vertical DMOS structure with optimized drift region doping to achieve 500V breakdown while maintaining low on-resistance. Its gate threshold voltage (V_GS(th)) is 2–4V, and it exhibits typical input capacitance (C_iss) of 1200pF at V_DS = 25V.

This Generation 3 HEXFET device features non-rail-to-rail gate drive compatibility, avalanche-rated operation (E_AS = 190mJ), and specified safe operating area (SOA) up to 10ms at 25°C ambient - enabling robust use in unclamped inductive switching circuits.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DSS	500V - supports primary-side switching in universal-input AC/DC supplies up to 375V DC bus
R_DS(on) @ V_GS=10V	0.4Ω - limits conduction loss to ≤79W at 14A, requiring heatsink above ~10W dissipation
I_D (continuous)	14A @ T_C=25°C - defines maximum DC current before thermal runaway under forced-air cooling
Q_g	72nC - determines minimum gate driver peak current (≥1.4A for 50ns rise time)
E_AS	190mJ - enables single-pulse unclamped inductive switching without failure in relay/snubberless designs
t_rr	230ns - constrains maximum switching frequency to ≤200kHz in hard-switched topologies

Pinout & Package

IRF450 is housed in a through-hole TO-220AB package with isolated tab (electrically connected to drain). The package provides 1.5°C/W junction-to-case thermal resistance and supports mounting with insulating washer or thermal pad.

Pin/Terminal	Circuit Role	Design Meaning
Drain (Tab)	Main current return path to high-voltage rail	Electrically tied to metal tab; requires isolation from heatsink unless system ground referenced
Gate	Control electrode for channel inversion	High-impedance input (C_iss = 1200pF); sensitive to ESD; requires <5V threshold margin for reliable turn-on
Source	Reference node for gate drive and load current return	Common connection point for gate driver return, current sense resistor, and low-side reference

Key Features

Feature	Design Value
Fully avalanche-rated	Guarantees single-pulse energy handling up to 190mJ without parameter shift or failure
Fast body diode recovery	t_rr = 230ns enables reduced snubber losses in bridge-leg and synchronous rectifier configurations
Enhancement-mode operation	Zero gate bias ensures default-off state - critical for fail-safe power-up sequencing
TO-220AB mechanical standardization	Enables drop-in replacement across legacy 500V MOSFETs using common heatsink footprints and mounting hardware

Applications

Offline AC/DC Power Supplies

Industrial Motor Drives

Use Scenario: Primary switch in 100–300W universal-input flyback converters with 375V DC bus.

IC Role / Device Role / Timing Role: High-voltage power switch controlled by PWM controller (e.g., UC3842) with 50–100kHz switching.

Use Value: 500V rating accommodates 375V bus + 30% surge; 0.4Ω R_DS(on) keeps conduction loss below 8W at full load.

Use Scenario: Half-bridge leg in 1–3HP three-phase inverter driving induction motors.

IC Role / Device Role / Timing Role: Low-side switching element commutating motor phase current with gate-driven dead-time control.

Use Value: Avalanche rating absorbs inductive kickback during short-circuit events; SOA supports 10ms overload pulses.

DC-DC Boost Converters

Lighting Ballasts

Use Scenario: Switching transistor in 24V-to-400V boost stage for LED streetlight drivers.

IC Role / Device Role / Timing Role: High-side switch operating at 60kHz with fixed duty cycle and current-mode feedback.

Use Value: 14A I_D headroom supports 10A peak inductor current; t_rr minimizes reverse recovery loss in discontinuous mode.

Use Scenario: Resonant inverter switch in electronic CFL ballasts with 25–50kHz operation.

IC Role / Device Role / Timing Role: Hard-switched resonant pole device synchronized to zero-voltage crossing via phase-shift control.

Use Value: 500V V_DSS withstands lamp ignition transients up to 450V; fast body diode reduces capacitive turn-on stress.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STP14NF50	Same V_DSS (500V), higher R_DS(on) (0.55Ω), lower Q_g (45nC)	Better switching efficiency at light loads; higher conduction loss at >8A	Prefer for high-frequency, low-duty-cycle applications where gate drive loss dominates
IXTH12N50L	Lower V_DSS (500V same), lower R_DS(on) (0.38Ω), higher I_D (12A continuous)	Superior thermal performance in compact heatsinks; not rated for same SOA pulse duration	Select when board space limits heatsink size but avalanche robustness is secondary to conduction loss

Compared with STP14NF50 and IXTH12N50L, the IRF450 offers the best balance of avalanche ruggedness and SOA width for industrial inductive loads, though with higher gate charge than ST's part and slightly higher on-resistance than IXYS's offering.

Availability

IRF450 is available at Aetrix Electronics and suitable for offline AC/DC power supplies, industrial motor drives, and lighting ballasts requiring stable component supply across multi-year production cycles.

Supply support for IRF450 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

International Rectifier (now part of Infineon Technologies since 2015) was a pioneer in power MOSFET design, specializing in high-voltage discrete semiconductors for industrial and automotive systems.

The HEXFET product line - including the IRF450 - was engineered for rugged, high-reliability switching in mains-connected equipment, emphasizing avalanche tolerance, SOA integrity, and long-term parametric stability under thermal cycling.

FAQ

What is the maximum junction temperature for continuous operation of the IRF450?

The IRF450 has a maximum rated junction temperature of 175°C. Continuous operation at this temperature requires derated current (I_D ≤ 4.5A) and careful thermal design - including thermal interface material, heatsink fin density, and airflow ≥200LFM. At 25°C case temperature, full 14A rating applies.

Is the IRF450 suitable for use in synchronous rectification topologies?

No - the IRF450 is not optimized for synchronous rectification. Its body diode reverse recovery time (t_rr = 230ns) and relatively high Q_rr cause significant switching loss when used as a freewheeling device. Dedicated low-Q_rr, logic-level MOSFETs (e.g., IRF7832) are recommended instead.

Does the IRF450 have built-in gate protection diodes?

No - the IRF450 does not integrate gate-source Zener clamps or ESD protection structures. External gate protection (e.g., 12V Zener between gate and source) is required in noisy environments or when driving with high-impedance sources to prevent gate oxide rupture from voltage transients exceeding ±20V.

Can the IRF450 be paralleled with identical units for higher current capacity?

Yes - the IRF450's positive temperature coefficient of R_DS(on) enables stable current sharing when paralleled. Use matched gate resistors (≤10Ω), symmetrical PCB layout, and individual source resistors (0.01Ω) for current balancing. Derate total current by 15% to account for thermal coupling and parameter spread.

IRF450 Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: HEXFET®

Package/Case:: TO-204AA, TO-3

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:: 12A (Tc)

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

Rds On (Max) @ Id, Vgs:: 500mOhm @ 12A, 10V

Vgs(th) (Max) @ Id:: 4V @ 250µA

Gate Charge (Qg) (Max) @ Vgs:: 120 nC @ 10 V

Vgs (Max):: ±20V

Input Capacitance (Ciss) (Max) @ Vds:: 2700 pF @ 25 V

FET Feature:: -

Power Dissipation (Max):: 150W (Tc)

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

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-204AA (TO-3)

IRF450 FAQ

1.How can I place an order for IRF450 through Aetrix?

Please submit a Request for Quotation (RFQ) for IRF450 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 IRF450 reliable?

The price and inventory of IRF450 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IRF450 is usually 5 days.

3.What payment methods are accepted for IRF450?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IRF450 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for IRF450?

IRF450 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your IRF450 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 IRF450?

For technical support, including IRF450 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IRF450 requirements.

6.How does Aetrix verify that IRF450 is sourced from the original manufacturer or authorized distributors?

All IRF450 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 IRF450 meets industry standards.

7.What is the process for return or replacement of IRF450?

All IRF450 units undergo pre-shipment inspection (PSI). If there is an issue with IRF450, 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 IRF450 part is unused and in its original packaging.

Return procedure for IRF450:

1.Submit a request within 90 days.

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

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