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Infineon Technologies IRFU1205PBF
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- Part No.:
- IRFU1205PBF
- Manufacturer:
- Infineon Technologies
- Category:
- FETs, MOSFETs
- Package:
- TO-251-3 Short Leads, IPAK, TO-251AA
- Datasheet:
-
IRFU1205PBF.pdf
- Description:
- MOSFET N-CH 55V 44A IPAK
- Quantity:
- Payment:
- Shipping:
Inventory:3,988
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Product details
Overview
IRFU1205PBF from Infineon Technologies (formerly International Rectifier) is a 55 V, 8.7 A N-channel enhancement-mode MOSFET in TO-251AA (IPAK) package, with RDS(on) = 0.14 Ω at VGS = 10 V and Qg = 12 nC, designed for DC-DC converters and motor control switches.
For engineers reviewing the IRFU1205PBF datasheet, IRFU1205PBF pinout, IRFU1205PBF application, or IRFU1205PBF equivalent, key selection criteria include low gate charge for high-frequency switching, robust body diode recovery for synchronous rectification, and lead-free TO-251AA thermal performance in space-constrained industrial power stages.
Technical Context
This MOSFET employs planar stripe silicon technology with optimized channel density and integrated body diode for unidirectional current handling in low-side switching configurations. Its gate threshold voltage (VGS(th)) of 2.0–4.0 V enables direct drive from 3.3 V or 5 V logic controllers without level shifting.
The device supports repetitive avalanche energy rating (EAS) of 92 mJ and exhibits controlled dv/dt and di/dt during body diode commutation-critical for minimizing EMI in flyback and buck converter outputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDS | 55 V - Maximum drain-source blocking voltage for 24 V input bus applications with 20% margin |
| ID (continuous) | 8.7 A @ TC = 100 °C - Sustains continuous load current in thermally managed PCB layouts |
| RDS(on) | 0.14 Ω @ VGS = 10 V - Enables <1.2 W conduction loss at 8 A, reducing heatsink requirements |
| Qg | 12 nC - Allows efficient 500 kHz PWM switching with standard 1 A gate drivers |
| tr/tf | 12/15 ns - Supports fast edge rates while maintaining EMI compliance in Class B emissions |
| EAS | 92 mJ - Withstands single-pulse inductive turn-off stress without failure in relay driver circuits |
Pinout & Package
IRFU1205PBF uses the TO-251AA (IPAK) surface-mount package with exposed drain pad for enhanced thermal dissipation. The three-terminal configuration supports low-inductance PCB layout in high-current paths.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Drain (D) | Main current-carrying terminal | Internally connected to exposed metal pad; must be soldered to large copper pour for thermal management |
| Gate (G) | Control input | High-impedance MOS gate requiring <12 nC charge for full enhancement; sensitive to ESD |
| Source (S) | Reference node for gate drive | Common return path for load current; ties to ground or low-side shunt resistor |
Key Features
| Feature | Design Value |
|---|---|
| Lead-free (Pb-free) construction | Meets RoHS Directive 2011/65/EU; no lead in die attach, bond wires, or termination plating |
| Fast body diode recovery | trr = 45 ns with soft recovery waveform-reduces voltage overshoot during freewheeling in buck regulators |
| Enhanced avalanche ruggedness | Rated for repetitive unclamped inductive switching (UIS) up to 92 mJ-enables reliable operation in solenoid drivers |
| Low gate threshold spread | VGS(th) = 2.0–4.0 V-ensures consistent turn-on across temperature and process variation in battery-powered systems |
Applications
| Brushless DC Motor Driver | Industrial DC-DC Converter |
|---|---|
Use Scenario: Low-side switch in 3-phase BLDC inverter stage driving 24 V, 5 A fans or pumps. IC Role / Device Role / Timing Role: Power switch controlling phase current flow; synchronized to PWM signals from MCU timer outputs. Use Value: 0.14 Ω RDS(on) limits conduction loss to <3.5 W per phase at full load, enabling compact heatsink design. | Use Scenario: Synchronous rectifier in isolated 24 V to 5 V flyback converter for PLC I/O modules. IC Role / Device Role / Timing Role: Secondary-side power switch replacing Schottky diode to improve efficiency at light-to-moderate loads. Use Value: Body diode trr = 45 ns prevents voltage spikes during cross-conduction, reducing snubber component count. |
| Automotive HVAC Blower Control | LED Constant-Current Driver |
Use Scenario: PWM-controlled blower motor switch in 12 V automotive cabin climate systems. IC Role / Device Role / Timing Role: Low-side switching element driven by vehicle MCU with 5 V logic output. Use Value: VGS(th) max = 4.0 V ensures reliable turn-on even with degraded 5 V rail under cold-crank conditions. | Use Scenario: Dimmable LED string driver using constant-current buck topology with analog/PWM dimming. IC Role / Device Role / Timing Role: Main power switch regulating average LED current via duty-cycle control. Use Value: Qg = 12 nC allows clean 1–10 kHz PWM dimming without gate drive distortion or audible noise. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar N-channel MOSFET switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STP8NK50ZFP | 500 V VDS, 7.5 A ID, RDS(on) = 0.75 Ω - higher voltage rating but 5× higher on-resistance | Suitable for 400 V PFC stages; not recommended for 24 V DC-DC due to excessive conduction loss | Select only when higher breakdown voltage is required and thermal budget permits higher RDS(on) |
| DMN3025LFG-7 | 30 V VDS, 12 A ID, RDS(on) = 0.025 Ω - lower voltage rating but 5.6× lower on-resistance | Optimized for 12 V battery systems; unsafe above 36 V supply transients | Prefer for 12 V automotive or portable equipment where VDS margin ≤ 36 V is guaranteed |
Compared with STP8NK50ZFP and DMN3025LFG-7, IRFU1205PBF offers balanced trade-offs for 24–48 V industrial power stages: sufficient voltage headroom, low-enough RDS(on) for thermal manageability, and proven body diode behavior in synchronous rectification.
Availability
IRFU1205PBF is available at Aetrix Electronics and suitable for brushless DC motor drives, industrial DC-DC converters, and automotive HVAC blower controls requiring stable component supply and long-term manufacturability.
Supply support for IRFU1205PBF 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, sensor, and automotive ICs, with global manufacturing and quality certification to ISO/TS 16949.
IRFU1205PBF belongs to the StrongIRFET™ family-designed specifically for high-efficiency, high-reliability industrial and automotive power conversion where ruggedness and parametric consistency are critical.
FAQ
What is the maximum junction temperature for continuous operation?
The IRFU1205PBF has a rated maximum junction temperature (TJ) of 175 °C. Derating begins at TC = 100 °C, where continuous drain current drops to 8.7 A. Thermal design must ensure case temperature stays below this limit using ≥250 mm² of 2 oz copper connected to the drain pad.
Does IRFU1205PBF support gate drive from 3.3 V microcontrollers?
No-its VGS(th) range is 2.0–4.0 V, and full enhancement (RDS(on) ≤ 0.14 Ω) requires VGS ≥ 10 V. Driving directly from 3.3 V logic results in RDS(on) > 1.2 Ω and excessive heating; a gate driver IC or level shifter is mandatory.
Is the body diode suitable for reverse polarity protection?
No-the body diode conducts forward from source to drain and cannot block reverse voltage. For reverse polarity protection, an external P-channel MOSFET or series Schottky diode must be used; the IRFU1205PBF's internal diode is intended only for freewheeling in inductive loads.
How does the TO-251AA package compare thermally to TO-220AB?
TO-251AA has higher thermal resistance (RθJC = 3.5 °C/W vs. TO-220AB's ~1.5 °C/W) but enables smaller PCB footprints. Effective thermal performance depends on drain-pad soldering to ≥4 cm² of 2 oz copper; without proper layout, junction temperature rise exceeds specifications at >5 A continuous current.
IRFU1205PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- HEXFET®
- Package/Case:
- TO-251-3 Short Leads, IPAK, TO-251AA
- Packaging:
- Tube
- Product Status:
- Obsolete
- FET Type:
- N-Channel
- Technology:
- MOSFET (Metal Oxide)
- Drain to Source Voltage (Vdss):
- 55 V
- Current - Continuous Drain (Id) @ 25°C:
- 44A (Tc)
- Drive Voltage (Max Rds On, Min Rds On):
- 10V
- Rds On (Max) @ Id, Vgs:
- 27mOhm @ 26A, 10V
- Vgs(th) (Max) @ Id:
- 4V @ 250µA
- Gate Charge (Qg) (Max) @ Vgs:
- 65 nC @ 10 V
- Vgs (Max):
- ±20V
- Input Capacitance (Ciss) (Max) @ Vds:
- 1300 pF @ 25 V
- FET Feature:
- -
- Power Dissipation (Max):
- 107W (Tc)
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- IPAK (TO-251AA)
IRFU1205PBF FAQ
1.How can I place an order for IRFU1205PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for IRFU1205PBF 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 IRFU1205PBF reliable?
The price and inventory of IRFU1205PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IRFU1205PBF is usually 5 days.
3.What payment methods are accepted for IRFU1205PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IRFU1205PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for IRFU1205PBF?
IRFU1205PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your IRFU1205PBF 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 IRFU1205PBF?
For technical support, including IRFU1205PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IRFU1205PBF requirements.
6.How does Aetrix verify that IRFU1205PBF is sourced from the original manufacturer or authorized distributors?
All IRFU1205PBF 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 IRFU1205PBF meets industry standards.
7.What is the process for return or replacement of IRFU1205PBF?
All IRFU1205PBF units undergo pre-shipment inspection (PSI). If there is an issue with IRFU1205PBF, 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 IRFU1205PBF part is unused and in its original packaging.
Return procedure for IRFU1205PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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