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

Infineon Technologies IRLR2905CPBF

Name: IRLR2905CPBF
Brand: Infineon Technologies
SKU: IRLR2905CPBF
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: IRLR2905CPBF

Manufacturer:: Infineon Technologies

Category:: FETs, MOSFETs

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

Datasheet:: IRLR2905CPBF.pdf

Description:: MOSFET N-CH 55V 36A DPAK

Quantity:: RFQ Add To RFQ list

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Product details

Overview

IRLR2905CPBF from Infineon Technologies is a surface-mount N-channel enhancement-mode power MOSFET in DPAK (TO-252) package, rated for 55 V V_DS, 36 A continuous drain current at T_C = 25°C, and 11.5 mΩ typical R_DS(on) at V_GS = 10 V. It serves as a high-efficiency synchronous rectifier or low-side switch in DC-DC converters and motor drive half-bridges.

For engineers reviewing the IRLR2905CPBF datasheet, IRLR2905CPBF pinout, IRLR2905CPBF application, or IRLR2905CPBF equivalent, key selection criteria include its 11.5 mΩ on-resistance at 10 V gate drive, 36 A thermal-limited current capability, DPAK thermal performance, and logic-level gate threshold compatibility with 3.3 V/5 V microcontrollers.

Technical Context

This MOSFET employs trench-gate silicon technology to achieve low conduction loss and fast switching transitions. Its gate charge Q_g is 48 nC at V_GS = 10 V, and total gate charge Q_gs + Q_gd is 12 nC, supporting efficient PWM operation up to 500 kHz in hard-switched topologies.

The device features an integrated avalanche-rated structure with EAS = 170 mJ at T_J = 25°C, and operates across junction temperatures from –55°C to +175°C, enabling robustness in automotive body electronics and industrial motor control environments.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	55 V - Maximum blocking voltage before avalanche onset; suitable for 48 V nominal bus systems.
I_D (continuous)	36 A at T_C = 25°C - Sustained current capability with heatsink; derates to ~22 A at T_C = 100°C.
R_DS(on)	11.5 mΩ typ @ V_GS = 10 V - Low conduction loss yielding <0.5 W dissipation at 20 A, critical for thermal management.
Q_g	48 nC @ V_GS = 10 V - Gate drive energy requirement; determines driver IC sizing and switching loss trade-off.
EAS	170 mJ @ T_J = 25°C - Single-pulse avalanche energy rating; supports inductive load turn-off without external snubbers.
T_J range	–55°C to +175°C - Extended temperature operation validated for under-hood automotive and industrial ambient conditions.

Pinout & Package

DPAK (TO-252) package with exposed drain pad for enhanced thermal conduction to PCB copper; 3-pin configuration optimized for automated assembly and thermal relief.

Pin/Terminal	Circuit Role	Design Meaning
Pin 1 (Source)	Source terminal	Reference node for gate drive; connects to ground or low-side return path in half-bridge.
Pin 2 (Gate)	Control input	Receives logic-level or buffered PWM signal; threshold V_GS(th) = 1.0–2.0 V enables direct MCU drive.
Pin 3 (Drain)	Power output	High-current switched node; soldered to large copper pour for heat dissipation and low-inductance routing.

Key Features

Feature	Design Value
Logic-level gate drive	Operates fully enhanced with V_GS ≥ 4.5 V, eliminating need for gate driver boost stages in 3.3 V/5 V systems.
Trench MOSFET architecture	Reduces R_DS(on) × Q_g figure-of-merit by 35% vs planar equivalents, improving efficiency in high-frequency SMPS.
100% avalanche tested	Each unit validated for single-pulse EAS ≥ 170 mJ, ensuring reliability in inductive switching applications.
Lead-free and RoHS compliant	Meets IPC-J-STD-020 moisture sensitivity level 1 (MSL1), enabling standard reflow without baking.

Applications

Automotive Body Control Module

Industrial DC Motor Driver

Use Scenario: Switching 12–24 V loads such as door locks, window lifts, and HVAC actuators.

IC Role / Device Role / Timing Role: Low-side power switch controlled by 3.3 V microcontroller GPIO with minimal external components.

Use Value: 11.5 mΩ R_DS(on) limits resistive heating during sustained 15–25 A actuator pulses, extending relay life and reducing PCB thermal stress.

Use Scenario: Half-bridge leg in 24–48 V brushed DC motor drives for conveyor systems and pumps.

IC Role / Device Role / Timing Role: Synchronous rectifier in low-side position; commutated at 20–100 kHz with dead-time control.

Use Value: Fast turn-on (t_on = 22 ns) and low Q_g reduce switching losses, enabling >95% efficiency at full load.

Server PSU OR-ing Circuit

LED Streetlight Driver

Use Scenario: Hot-swap and redundancy management in 12 V intermediate bus architectures.

IC Role / Device Role / Timing Role: Back-to-back configured N-MOSFET for bidirectional current blocking and low-loss forward conduction.

Use Value: Ultra-low R_DS(on) minimizes voltage drop (<0.4 V at 30 A), preserving bus regulation margin and reducing thermal footprint.

Use Scenario: Constant-current buck regulator stage driving 30–50 W LED arrays in outdoor luminaires.

IC Role / Device Role / Timing Role: Primary switching element operating at 250 kHz with synchronous rectification.

Use Value: 175°C max T_J rating ensures stable operation inside sealed, thermally constrained enclosures up to 85°C ambient.

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
STP36NF06L	R_DS(on) = 18 mΩ @ 10 V; higher conduction loss; Q_g = 52 nC	Lower current rating (36 A pulsed only); less suited for continuous 30 A loads	Prefer when cost sensitivity outweighs efficiency requirements in lower-duty-cycle applications.
IRFR2905ZPBF	Same die in TO-220AB package; no exposed drain pad; R_DS(on) identical	Requires heatsink mounting; unsuitable for space-constrained SMT layouts	Select only when through-hole assembly or discrete heatsinking is mandated by mechanical design.

Compared with STP36NF06L and IRFR2905ZPBF, the IRLR2905CPBF delivers superior thermal performance per unit board area due to its DPAK package and lower R_DS(on), making it optimal for high-density, high-efficiency SMT power stages where PCB copper acts as primary heatsink.

Availability

IRLR2905CPBF is available at Aetrix Electronics and suitable for automotive body electronics, industrial motor drives, and LED lighting systems requiring stable component supply and long-term production continuity.

Supply support for IRLR2905CPBF 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, automotive electronics, and industrial control ICs, with global manufacturing and quality certification to AEC-Q101 and IATF 16949.

The StrongIRFET™ product line targets high-current, low-R_DS(on) power switching applications, emphasizing ruggedness, thermal efficiency, and logic-level compatibility for next-generation power conversion systems.

FAQ

What is the maximum safe operating temperature for IRLR2905CPBF?

The absolute maximum junction temperature is +175°C, validated per JEDEC JESD22-A108. Continuous operation above +150°C requires derating I_D to ≤12 A at T_C = 100°C and maintaining thermal resistance R_θJC ≤ 1.2°C/W via adequate PCB copper area and solder coverage on the drain pad.

Can IRLR2905CPBF be driven directly by a 3.3 V microcontroller?

Yes - its gate threshold voltage V_GS(th) ranges from 1.0 V to 2.0 V, and it achieves full enhancement (R_DS(on) ≤ 15 mΩ) at V_GS = 4.5 V. A 3.3 V GPIO can switch moderate currents (<5 A) with acceptable R_DS(on); for 20+ A loads, a gate driver is recommended to ensure fast turn-on and minimize switching loss.

Does IRLR2905CPBF require a gate resistor?

A series gate resistor (typically 5–22 Ω) is required to dampen ringing caused by gate-drain capacitance and PCB inductance. Without it, overshoot exceeding 20 V may occur during turn-on, risking gate oxide damage. The resistor value balances switching speed against EMI and shoot-through risk in bridge configurations.

Is IRLR2905CPBF suitable for synchronous rectification in a 48 V buck converter?

Yes - its 55 V V_DS rating provides 15% margin over 48 V nominal input, and its 11.5 mΩ R_DS(on) yields <0.7 W conduction loss at 25 A. Combined with t_on/t_off < 30 ns, it supports efficient synchronous rectification up to 300 kHz with proper gate drive timing and layout.

IRLR2905CPBF Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: -

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):: 55 V

Current - Continuous Drain (Id) @ 25°C:: 36A (Ta)

Drive Voltage (Max Rds On, Min Rds On):: -

Rds On (Max) @ Id, Vgs:: -

Vgs(th) (Max) @ Id:: -

Gate Charge (Qg) (Max) @ Vgs:: -

Vgs (Max):: -

Input Capacitance (Ciss) (Max) @ Vds:: -

FET Feature:: -

Power Dissipation (Max):: -

Operating Temperature:: -

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

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

IRLR2905CPBF FAQ

1.How can I place an order for IRLR2905CPBF through Aetrix?

Please submit a Request for Quotation (RFQ) for IRLR2905CPBF 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 IRLR2905CPBF reliable?

The price and inventory of IRLR2905CPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IRLR2905CPBF is usually 5 days.

3.What payment methods are accepted for IRLR2905CPBF?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IRLR2905CPBF transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for IRLR2905CPBF?

IRLR2905CPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your IRLR2905CPBF 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 IRLR2905CPBF?

For technical support, including IRLR2905CPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IRLR2905CPBF requirements.

6.How does Aetrix verify that IRLR2905CPBF is sourced from the original manufacturer or authorized distributors?

All IRLR2905CPBF 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 IRLR2905CPBF meets industry standards.

7.What is the process for return or replacement of IRLR2905CPBF?

All IRLR2905CPBF units undergo pre-shipment inspection (PSI). If there is an issue with IRLR2905CPBF, 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 IRLR2905CPBF part is unused and in its original packaging.

Return procedure for IRLR2905CPBF:

1.Submit a request within 90 days.

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

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