IRFZ24NPBF - 55V 17A N-Channel HEXFET MOSFET TO-220AB | Infineon
MPN: IRFZ24NPBF β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0.95 | $0.95 |
| 10 | $0.82 | $8.20 |
| 100 | $0.68 | $68.00 |
| 500 | $0.55 | $275.00 |
| 1,000 | $0.46 | $460.00 |
Drop-in alternatives for IRFZ24NPBF β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
IRFZ34N
β Drop-Inπ Reference alternative (not in catalog)
IRLZ24NPBF
β Drop-Inπ Reference alternative (not in catalog)
IRFZ44N
β Drop-Inπ Reference alternative (not in catalog)
STP55NF06L
β Drop-Inπ Reference alternative (not in catalog)
NTD18N06T4
β Drop-Inπ Reference alternative (not in catalog)
IRFZ24N
β Drop-Inπ Reference alternative (not in catalog)
IRFZ24NPBF Maximum Ratings & Electrical Characteristics
| FET Type | N-Channel |
| Drain-to-Source Voltage (VDS) | 55 V |
| Continuous Drain Current (ID) at TC=25C | 17 A |
| Gate-to-Source Voltage (VGS) | Β± 20 V |
| RDS(on) at VGS=10V | 70 mOhm (max) |
| Total Gate Charge (Qg) | 13.3 nC |
| Power Dissipation (PD) at TC=25C | 45 W |
| Operating Junction Temperature | -55C to +175C |
| Package | TO-220AB (through hole) |
| Mounting Type | Through Hole |
| Technology | HEXFET planar cell |
| Switching Frequency Range | Optimized for < 100 kHz |
| RoHS Status | Compliant |
| Lead-Free | Yes (PBF suffix) |
| Qualification | JEDEC standard |
| Channel Mode | Enhancement |
IRFZ24NPBF Pin Configuration
| Pin 1 | Gate β Gate drive input; drive to +10V to fully enhance |
| Pin 2 | Drain β Drain terminal; also electrically tied to the metal mounting tab |
| Pin 3 | Source β Source terminal; reference for gate drive and Kelvin connection |
IRFZ24NPBF Safe Operating Area (DC)
Typical Applications
IRFZ24NPBF is suitable for 6 applications: DC Motor Drive (H-Bridge / Low-Side), Solenoid and Relay Driver, Uninterruptible Power Supply (UPS) / Battery Switch, Low-Frequency Switch-Mode Power Supply (SMPS), Automotive 12V Load Switch, Power Tool Speed Controller (PWM).
DC Motor Drive (H-Bridge / Low-Side)
The IRFZ24NPBF is well suited to low-side switching of brushed DC motors in the 5A-15A continuous range. Its 70 milliohm RDS(on) at VGS=10V keeps conduction loss under 1W at 12V/10A, while the 13.3 nC total gate charge lets a small IR2104 or discrete push-pull driver toggle the MOSFET at PWM frequencies up to 25 kHz. The 55V VDS rating gives 31V headroom above a 24V industrial bus, so inductive flyback from the motor winding is comfortably absorbed by the avalanche-rated body diode.
Recommended
Solenoid and Relay Driver
For 12V and 24V solenoid or relay coils, the IRFZ24NPBF delivers the 17A continuous current capability needed to actuate large inductive loads. Its HEXFET planar cell structure provides a wide safe operating area, so the inrush current of an uncharged coil does not exceed the SOA envelope. Place a flyback diode across the coil and add a 10 kohm gate-source resistor to prevent false turn-on from dv/dt coupling during switch-off.
Recommended
Uninterruptible Power Supply (UPS) / Battery Switch
In 12V and 24V lead-acid UPS systems the IRFZ24NPBF serves as a low-loss disconnect switch between battery and load. The 55V VDS comfortably exceeds 24V battery voltage plus transient spikes, while the 70 milliohm RDS(on) limits continuous loss to about 0.7W at 10A discharge current. The HEXFET body diode provides a path for inrush from the charger, simplifying reverse-battery protection circuitry.
Recommended
Low-Frequency Switch-Mode Power Supply (SMPS)
For SMPS topologies operating below 100 kHz - such as forward converters, push-pull stages, and large-rail buck regulators - the IRFZ24NPBF is an efficient switching element. Its 13.3 nC Qg keeps gate drive loss below 0.2W at 25 kHz with VGS swing of 10V, and the planar cell structure supports the avalanche energy encountered during transformer primary switching. Use a UCC28C42 or similar PWM controller for the gate signal.
Recommended
Automotive 12V Load Switch
Inside 12V automotive body-electronics modules - headlight drivers, seat heaters, accessory relays - the IRFZ24NPBF switches loads up to 17A from a 12V bus. The 55V VDS withstands 40V load-dump transients with sufficient margin, while the 70 milliohm RDS(on) keeps dissipation under 1.5W at the part's typical 15A continuous load. Add an RC snubber (100 ohm + 100 nF) across drain-source to suppress automotive EMI.
Recommended
Power Tool Speed Controller (PWM)
Cordless drill and other 18V-24V power-tool speed controllers use the IRFZ24NPBF as the low-side PWM element driving the brush motor. The HEXFET structure handles the high inrush during stall conditions, and the 45W power dissipation at TC=25C provides thermal headroom when mounted to the tool's aluminum chassis acting as a heatsink. A simple 555-timer or microcontroller generates the 1-20 kHz PWM gate signal.
Recommended
Recommended Products Summary
Engineering reference data for IRFZ24NPBF β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | IRFZ34N | IRLZ24NPBF | IRFZ44N | STP55NF06L | NTD18N06T4 |
|---|---|---|---|---|---|---|
| Brand | Infineon | Infineon | Infineon | Infineon | STMicroelectronics | onsemi |
| Package | TO-220AB | TO-220AB - same | TO-220AB - same | TO-220AB - same | TO-220AB - same | TO-220AB - same |
| Drain-Source Voltage (VDS) | 55 V | 55 V | 55 V | 55 V | 60 V | 60 V |
| Continuous Drain Current (ID, TC=25C) | 17 A | 29 A | 17 A | 49 A | 50 A | 18 A |
| RDS(on) at VGS=10V (max) | 70 mOhm | 50 mOhm | 70 mOhm | 17.5 mOhm | 20 mOhm | 60 mOhm |
| Gate Threshold Voltage VGS(th) | [DATA_NEEDED] | [DATA_NEEDED] | ~1V (logic-level) | [DATA_NEEDED] | ~1V (logic-level) | [DATA_NEEDED] |
| Total Gate Charge (Qg) | 13.3 nC | [DATA_NEEDED] | 13.3 nC | 63 nC | [DATA_NEEDED] | [DATA_NEEDED] |
| Power Dissipation (PD, TC=25C) | 45 W | 68 W | 45 W | 94 W | 95 W | 55 W |
| Logic-Level Gate (5V drive) | No | No | Yes | No | Yes | No |
| Approx. 1k-Piece Price (USD) | 0.46 | 0.55 | 0.50 | 0.65 | 0.95 | 0.55 |
Key Differentiators
- Best price/performance balance for sub-15A 12V/24V switching (vs IRFZ44N)
- Mature JEDEC-qualified HEXFET process (vs STP55NF06L (STMicroelectronics))
- Wide distribution and immediate availability (vs NTD18N06T4 (onsemi))
Design Notes
The TO-220AB junction-to-ambient thermal resistance is approximately 62 C/W without a heatsink. Estimated: at 5A continuous load and VDS=12V, dissipation is I^2*R = 25*0.070 = 1.75 W, which gives a junction rise of about 108 C above 25C ambient - already near the 175C limit. Add a 10 C/W heatsink with thermal compound to bring the junction rise below 30 C and allow safe operation near the 45 W datasheet maximum at 25C case temperature.
Place the gate drive resistor (typically 10-100 ohm) within 5 mm of the gate pin to suppress ringing from the gate-source loop inductance. Keep the source return path short and wide; the gate-source loop inductance combined with the Miller capacitance can otherwise cause >5V ringing at switch-off, which may exceed the Β±20V VGS maximum. A 10 kohm gate-source pull-down resistor guarantees the MOSFET stays off during MCU reset.
Do not use the IRFZ24NPBF directly from a 3.3V or 5V microcontroller GPIO without a gate driver. Its VGS(th) is typically 2-4V, so a 3.3V signal will leave the MOSFET in its linear region with high RDS(on) and excessive dissipation. Use a logic-level MOSFET like IRLZ24NPBF instead for 5V direct drive, or add a simple BJT/MOSFET push-pull driver to translate 3.3V to the required 10V VGS.
When driving inductive loads, add a flyback diode (1N4007 or Schottky MBR1045) directly across the coil with leads shorter than 10 mm. Even though the HEXFET structure is avalanche-rated, repeated unclamped flyback events stress the die and shorten lifetime. For switching frequencies above 1 kHz, add an RC snubber (100 ohm + 100 nF) across drain-source to reduce dV/dt-induced ringing.
Compliance Information
RoHS-compliant per Infineon product page; 'PBF' suffix indicates lead-free plating. Not AEC-Q100 qualified - choose an automotive-grade equivalent such as IRFZ24NSTRLPBF (Infineon automotive line) for vehicle applications. Halogen-free status not explicitly stated in verified data.
