Infineon IRFB4110PBF: A Benchmark High‑Current, Low‑Impedance Power MOSFET

In the field of power semiconductors, Infineon's HEXFET® series of MOSFETs has long been renowned for exceptional performance and reliability. The IRFB4110PBF, a star product in this family, stands out with its 100 V breakdown voltage, 180 A continuous current, and 4.5 mΩ ultra‑low on‑resistance, making it an ideal choice for high‑power switched‑mode power supplies, motor drives, and battery management systems.

1. Product Positioning and Key Specifications

The IRFB4110PBF is an N‑channel enhancement‑mode power MOSFET housed in the classic **TO‑220AB through‑hole package**. It belongs to Infineon's HEXFET® power MOSFET family and is built using advanced **Trench MOSFET technology**, achieving extremely low on‑resistance and fast switching performance per unit silicon area.

Parameter	Specification
Drain‑source voltage (VDS)	100 V
Continuous drain current (ID)	180 A
On‑resistance (RDS(on))	4.5 mΩ @ VGS = 10 V
Gate charge (Qg)	210 nC @ 10 V
Input capacitance (Ciss)	9620 pF
Output capacitance (Coss)	670 pF
Reverse transfer capacitance (Crss)	250 pF
Power dissipation (PD)	370 W
Operating junction temperature	–55 °C ~ +175 °C
Package	TO‑220AB
Mounting type	Through‑hole

2. Technical Features and Reliability

The advantages of the IRFB4110PBF go beyond static parameters, extending to comprehensive reliability safeguards:

- Improved gate, avalanche, and dynamic dV/dt ruggedness** – enhances device robustness under harsh switching conditions.
- Fully characterised capacitance and avalanche SOA (Safe Operating Area)** – provides designers with complete data support, ensuring system reliability.
- Enhanced body‑diode dV/dt and dI/dt capability** – delivers superior performance during transient events such as reverse recovery.
- Environmentally compliant** – lead‑free, RoHS‑compliant, and halogen‑free.

3. Typical Applications

Combining high current, low impedance, and high reliability, the IRFB4110PBF is widely used in:

- High‑efficiency synchronous rectification in switched‑mode power supplies (SMPS)
- Uninterruptible power supply (UPS) systems
- DC‑DC converters and battery chargers
- Motor control and drives (including electric‑vehicle motor controllers and industrial motor drives)
- High‑speed power switching and hard‑switching high‑frequency circuits

4. Q&A

Q: What does the "PBF" suffix on the IRFB4110PBF mean?

A: "PBF" stands for "Lead‑Free", indicating that the device meets RoHS environmental standards and is manufactured with lead‑free processes. Additionally, the IRFB4110PBF also complies with halogen‑free requirements.

Q: Is the continuous drain current 180 A or 120 A?

A: Both are correct – the difference lies in the test conditions. 180 A is the rating at a case temperature (Tc) of 25 °C, while 120 A is the actual current capability at higher case temperatures. In practice, derating is required based on the heat‑dissipation conditions.

Q: What is the difference between the IRFB4110PBF and the IRFP4110PBF?

A: Their electrical parameters are essentially identical. The main difference is the package: the IRFB4110PBF uses the TO‑220AB package, while the IRFP4110PBF uses the TO‑247AC package. The TO‑247 is larger and offers better thermal performance, making it suitable for higher‑power‑density applications; the TO‑220 is more common and cost‑effective.

5. Conclusion

The IRFB4110PBF is a flagship product from Infineon in the high‑current power MOSFET arena – packing 100 V breakdown voltage, 180 A current, and 4.5 mΩ ultra‑low on‑resistance into the classic TO‑220 package. Whether for high‑efficiency switched‑mode power supplies, high‑power motor drives, or demanding industrial and automotive applications, it remains a reliable choice that balances performance and cost.

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