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

Infineon Technologies 94-4156PBF

Name: 94-4156PBF
Brand: Infineon Technologies
SKU: 94-4156PBF
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 94-4156PBF

Manufacturer:: Infineon Technologies

Category:: FETs, MOSFETs

Package:: TO-252-3, DPAK (2 Leads + Tab), SC-63

Datasheet:: 94-4156PBF.pdf

Description:: MOSFET N-CH 20V 75A DPAK

Quantity:: RFQ Add To RFQ list

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Product details

Overview

94-4156PBF from International Rectifier is a 20V, 75A D-Pak N-channel Power MOSFET with 9.5mΩ R_DS(on) at V_GS = 10V, optimized for high-frequency synchronous rectification in telecom DC-DC converters and CPU power buck stages. It features fully characterized avalanche capability (216 mJ), ultra-low gate impedance (R_G = 0.3–3.2 Ω), and 100% R_G tested lead-free construction.

For engineers reviewing the 94-4156PBF datasheet, 94-4156PBF pinout, 94-4156PBF application, or 94-4156PBF equivalent, key selection criteria include R_DS(on) at 4.5V/10V, Q_g (19 nC), C_iss/C_oss values, body diode recovery (Q_rr = 45–75 nC), and thermal resistance (R_θJA = 50 °C/W on FR-4 PCB).

Technical Context

This MOSFET employs HEXFET® silicon technology with planar gate structure and optimized cell pitch to achieve ultra-low conduction loss while maintaining fast switching dynamics. Its low Q_gd/Q_g ratio (6.4/19 nC) supports efficient hard-switching operation up to several hundred kHz.

The device integrates a robust intrinsic body diode with controlled reverse recovery (t_rr = 38–62 ns, Q_rr = 45–75 nC) and specified avalanche energy (E_AS = 216 mJ), enabling reliable unclamped inductive switching in synchronous buck and isolated forward topologies.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	20 V - Maximum blocking voltage compatible with 12V input rails and low-voltage point-of-load designs.
R_DS(on) max	9.5 mΩ @ V_GS = 10V - Enables <1W conduction loss at 75A, critical for high-current CPU/GPU VRMs.
I_D continuous	75 A @ T_C = 25°C - Rated for high-current synchronous rectification when mounted on 1"² FR-4 PCB.
Q_g	19 nC - Low total gate charge reduces driver power loss and enables fast turn-on with moderate gate drive strength.
C_iss	1996 pF - Input capacitance determines gate drive loop stability and Miller effect sensitivity in high-dV/dt environments.
E_AS	216 mJ - Single-pulse avalanche energy rating validates robustness during transient overvoltage events in non-clamped circuits.
t_rr	38–62 ns - Body diode reverse recovery time directly impacts switching loss and EMI in synchronous rectifier mode.

Pinout & Package

D-Pak (TO-252AA) package with exposed drain pad for enhanced thermal performance. Standard 3-pin configuration: Pin 1 = Gate, Pin 2 = Drain (tab), Pin 3 = Source.

Pin/Terminal	Circuit Role	Design Meaning
Pin 1 (G)	Gate	Control terminal requiring ≤±20V V_GS; low R_G (0.3–3.2 Ω) minimizes gate ringing and improves switching consistency.
Pin 2 (D)	Drain	High-current output node connected to exposed copper tab; electrically tied to drain metallization for low-inductance power path.
Pin 3 (S)	Source	Reference node for gate drive and current sensing; forms return path for load current and body diode conduction.

Key Features

Feature	Design Value
Ultra-low R_DS(on)	9.5 mΩ @ 10V ensures minimal I²R loss in high-current, low-voltage power stages (e.g., 1.2V/75A CPU VRM).
Fully characterized avalanche	216 mJ single-pulse rating validated per JEDEC JESD24-11, supporting reliable operation under inductive fault conditions.
100% R_G tested	Guarantees consistent gate drive timing and eliminates batch-to-batch variation in switching behavior.
Lead-free (PbF) construction	Complies with RoHS Directive 2011/65/EU and IPC/JEDEC J-STD-020 moisture sensitivity level 1 (MSL1).

Applications

Telecom DC-DC Converters

CPU Voltage Regulator Modules

Use Scenario: High-frequency isolated forward or LLC converter in 48V telecom rectifiers delivering 3.3–12V outputs.

IC Role / Device Role / Timing Role: Synchronous rectifier replacing Schottky diodes to reduce conduction loss and improve efficiency above 300 kHz.

Use Value: 9.5mΩ R_DS(on) cuts rectifier loss by >40% vs. 40V Schottky, enabling >95% full-load efficiency at 500 kHz.

Use Scenario: Multiphase buck converter supplying core voltage to x86 or ARM processors in servers and workstations.

IC Role / Device Role / Timing Role: High-side or low-side switch operating with 300–1000 kHz PWM and precise phase interleaving.

Use Value: Low Q_g (19 nC) and fast t_r/t_f (98/5 ns) minimize dead-time losses and support tight voltage regulation under dynamic load steps.

Industrial Motor Drives

LED Constant-Current Drivers

Use Scenario: Half-bridge inverter stage for BLDC motor control in HVAC blowers or industrial pumps (24–48V bus).

IC Role / Device Role / Timing Role: Low-side switching element handling continuous 50–75A current with PWM frequencies up to 20 kHz.

Use Value: Robust body diode (Q_rr = 45–75 nC) sustains freewheeling current without external anti-parallel diode, reducing BOM count.

Use Scenario: Buck-based constant-current driver for high-brightness LED arrays in street lighting or architectural applications.

IC Role / Device Role / Timing Role: Main switching transistor regulating average LED current via peak-current-mode control at 200–500 kHz.

Use Value: Low R_DS(on) maintains >96% efficiency at 5A output, while avalanche rating protects against inductive kick during open-circuit faults.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
IRFR3704PbF	Identical electrical specs, same D-Pak package, identical lot-marking convention and PbF compliance.	No functional difference; direct cross-reference per IR datasheet revision 1.2 (2003).	Select when sourcing from legacy inventory or distributor stock aligned with original IR part numbering.
IRFU3704PbF	Same die and specs; differs only in I-Pak (TO-220AB) package with insulated mounting hole and higher R_θJA (110 °C/W).	Suitable where mechanical mounting requires through-hole or heatsink isolation; not drop-in for surface-mount D-Pak footprints.	Choose for prototyping with breadboard-compatible leads or when thermal interface uses insulating hardware.

Compared with IRFR3704PbF, 94-4156PBF is functionally identical but reflects updated internal manufacturing lot coding; versus IRFU3704PbF, it offers superior PCB thermal performance (R_θJA = 50 vs. 110 °C/W) and smaller footprint-critical for dense VRM layouts.

Availability

94-4156PBF is available at Aetrix Electronics and suitable for telecom power supplies, CPU voltage regulator modules, and industrial motor drives requiring stable component supply and long-term production continuity.

Supply support for 94-4156PBF 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 and IGBT design, known for HEXFET® technology and high-reliability discrete power solutions.

This device belongs to the IRFR/U3704 family-engineered specifically for high-efficiency, high-frequency DC-DC conversion in space-constrained, thermally demanding applications such as server VRMs and telecom rectifiers.

FAQ

What is the maximum junction temperature for continuous operation?

The absolute maximum junction temperature is +175°C, and the device is rated for continuous operation up to this limit when thermal design meets R_θJC = 1.7°C/W and PCB layout follows AN-994 recommended footprint. Derating begins above T_C = 100°C per the ID vs. T_C curve (Fig. 9).

Does 94-4156PBF require a gate resistor for safe switching?

A gate resistor (typically 2.2–10 Ω) is recommended to dampen ringing caused by parasitic inductance and prevent unintended turn-on due to dV/dt coupling. The device's low R_G (0.3–3.2 Ω) makes external resistance essential for stable hard-switching above 100 kHz.

Can this MOSFET be used in linear (analog) mode?

No-it is not characterized or rated for linear-mode operation. The Safe Operating Area (SOA) curve (Fig. 8) shows operation is limited to pulse widths ≤10 ms at V_DS > 10V; sustained linear bias risks thermal runaway due to positive R_DS(on) temperature coefficient.

Is the body diode suitable for reverse recovery in synchronous rectification?

Yes-the body diode is fully characterized with t_rr = 38–62 ns and Q_rr = 45–75 nC at di/dt = 100 A/µs, making it suitable for synchronous rectification in buck and forward converters up to ~1 MHz, provided gate timing avoids shoot-through.

94-4156PBF Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: HEXFET®

Package/Case:: TO-252-3, DPAK (2 Leads + Tab), SC-63

Packaging:: Tube

Product Status:: Obsolete

FET Type:: N-Channel

Technology:: MOSFET (Metal Oxide)

Drain to Source Voltage (Vdss):: 20 V

Current - Continuous Drain (Id) @ 25°C:: 75A (Tc)

Drive Voltage (Max Rds On, Min Rds On):: 4.5V, 10V

Rds On (Max) @ Id, Vgs:: 9.5mOhm @ 15A, 10V

Vgs(th) (Max) @ Id:: 3V @ 250µA

Gate Charge (Qg) (Max) @ Vgs:: 19 nC @ 4.5 V

Vgs (Max):: ±20V

Input Capacitance (Ciss) (Max) @ Vds:: 1996 pF @ 10 V

FET Feature:: -

Power Dissipation (Max):: 90W (Tc)

Operating Temperature:: -55°C ~ 175°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: TO-252AA (DPAK)

94-4156PBF FAQ

1.How can I place an order for 94-4156PBF through Aetrix?

Please submit a Request for Quotation (RFQ) for 94-4156PBF 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 94-4156PBF reliable?

The price and inventory of 94-4156PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 94-4156PBF is usually 5 days.

3.What payment methods are accepted for 94-4156PBF?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 94-4156PBF transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 94-4156PBF?

94-4156PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 94-4156PBF 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 94-4156PBF?

For technical support, including 94-4156PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 94-4156PBF requirements.

6.How does Aetrix verify that 94-4156PBF is sourced from the original manufacturer or authorized distributors?

All 94-4156PBF 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 94-4156PBF meets industry standards.

7.What is the process for return or replacement of 94-4156PBF?

All 94-4156PBF units undergo pre-shipment inspection (PSI). If there is an issue with 94-4156PBF, 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 94-4156PBF part is unused and in its original packaging.

Return procedure for 94-4156PBF:

1.Submit a request within 90 days.

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

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