IRFI540NPBF International Rectifier Transistor (Transistor Outline, Vertical) In Stock
International Rectifier IRFI540NPBF is an N-channel power MOSFET rated at 100 V and 20 A with an on-resistance of 52 mΩ and avalanche energy rating of 300 mJ. Available in an isolated TO-220 full-pack package, it suits motor drives, DC-DC converters, and switching power supplies.
- Manufacturer
- International Rectifier
- Package
- Transistor Outline, Vertical
- Pin Count
- 3
- Lifecycle
- ACTIVE
- Datasheet
- IRFI540NPBF Datasheet PDF
- Category
- Transistor
- Price
- From $0.5317(MOQ 100)
- Temp Range
- -55.0°C to 175.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of IRFI540NPBF?
- 100 V drain-source breakdown voltage and 20 A continuous drain current for robust power switching
- Ultra-low 52 mΩ drain-source on-resistance (R_DS(on)) minimises conduction losses in DC-DC converters
- Avalanche-rated at 300 mJ (EAS) with high-reliability rating for rugged industrial and automotive-adjacent designs
- Isolated TO-220 full-pack package eliminates the need for an external insulating washer, simplifying heatsink mounting
- Built-in body diode supports synchronous rectification and freewheeling in inductive load switching circuits
What is IRFI540NPBF used for?
The IRFI540NPBF is well suited for motor drive circuits, switch-mode power supplies, and synchronous DC-DC converters operating at bus voltages up to 100 V and continuous currents up to 20 A. Its isolated package simplifies heatsink attachment in multi-FET power stages where electrical isolation from the chassis is required. The avalanche energy rating and high-reliability construction also make it a strong candidate for industrial inverters, battery-powered tools, and class-D audio amplifier output stages.
What are the specifications of IRFI540NPBF?
| Factory Lead Time | 18Weeks |
| YTEOL | 5.1 |
| Additional Feature | AVALANCHE RATED, HIGH RELIABILITY |
| Avalanche Energy Rating (Eas) | 300mJ |
| Case Connection | ISOLATED |
| Configuration | SINGLE WITH BUILT-IN DIODE |
| DS Breakdown Voltage-Min | 100V |
| Drain Current-Max (ID) | 20A |
| Drain-source On Resistance-Max | 0.052Ω |
| FET Technology | METAL-OXIDE SEMICONDUCTOR |
| JEDEC-95 Code | TO-220AB |
| JESD-30 Code | R-PSFM-T3 |
| JESD-609 Code | e3 |
| Number of Elements | 1 |
| Operating Mode | ENHANCEMENT MODE |
| Package Body Material | PLASTIC/EPOXY |
| Package Shape | RECTANGULAR |
| Package Style | FLANGE MOUNT |
| Peak Reflow Temperature (Cel) | 260 |
| Polarity/Channel Type | N-CHANNEL |
| Power Dissipation-Max (Abs) | 42W |
| Pulsed Drain Current-Max (IDM) | 110A |
| Qualification Status | Not Qualified |
| Surface Mount | NO |
| Terminal Finish | Tin (Sn) |
| Terminal Form | THROUGH-HOLE |
| Terminal Position | SINGLE |
| Time@Peak Reflow Temperature-Max (s) | 40 |
| Transistor Application | SWITCHING |
| Transistor Element Material | SILICON |
| Package | Transistor Outline, Vertical |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| Country of Origin | Mainland China |
Where can I find the IRFI540NPBF datasheet?
IRFI540NPBF Datasheet DownloadOfficial datasheet from International Rectifier
What are equivalent replacements for IRFI540NPBF?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What drain voltage and current ratings make the IRFI540NPBF suitable for 48 V bus motor drive designs?
The IRFI540NPBF is rated for 100 V drain-source breakdown voltage and 20 A continuous drain current, giving a comfortable 2× voltage margin above a 48 V bus after accounting for inductive spikes. The 52 mΩ on-resistance keeps conduction losses below 20 W at full 20 A load, and the 300 mJ avalanche energy rating absorbs transient energy from inductive loads without device failure.
How does the isolated package of the IRFI540NPBF simplify heatsink mounting compared with a standard TO-220?
The IRFI540NPBF comes in a TO-220 full-pack isolated package, meaning the metal tab is electrically isolated from the drain—the device can be bolted directly to a grounded chassis or shared heatsink without an insulating mica washer or thermal pad. This removes one assembly step, reduces thermal interface resistance, and lowers overall junction-to-case thermal resistance compared with a standard non-isolated TO-220 using a Kapton pad.
Which switching power supply topologies can benefit from the built-in diode in the IRFI540NPBF?
The IRFI540NPBF includes an inherent body diode (N-channel MOSFET body diode, forward current rated to 20 A), which acts as a freewheeling diode in buck converter low-side positions and enables synchronous rectification in half-bridge or full-bridge topologies. This eliminates the need for an external Schottky diode in many designs, reducing component count and PCB footprint in switch-mode power supplies, class-D amplifiers, and bidirectional DC-DC converters.
Is the IRFI540NPBF avalanche-rated and what does that mean for reliability in inductive load switching?
Yes, the IRFI540NPBF carries an additional feature rating of avalanche-rated with an EAS (single-pulse avalanche energy) of 300 mJ. During turn-off of inductive loads, voltage can exceed the 100 V drain-source rating; the device absorbs up to 300 mJ of avalanche energy without destructive failure. This is especially valuable in motor control and solenoid driver circuits where load inductance can generate spikes many times above the supply voltage.
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Why Buy from FindMyChip
About International Rectifier
International Rectifier is a leading electronic component manufacturer. FindMyChip sources International Rectifier ICs directly from authorized China distributors, offering competitive pricing and reliable stock.
More from International Rectifier
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 100+ | $0.9150 | $91.50 |
| 200+ | $0.5373 | $107.46 |
| 400+ | $0.5345 | $213.80 |
| 800+ | $0.5317 | $425.39 |
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“Their engineering team helped us find a pin-compatible alternative when our original MCU went EOL.”
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