IRFR3706CPBF Equivalent & Substitute Parts

Part Overview

The IRFR3706CPBF is an N-Channel MOSFET manufactured by Infineon Technologies, rated for 20V drain-to-source voltage with 75A continuous drain current at 25°C. This device is packaged in TO-252-3 DPAK (2 Leads + Tab) surface mount configuration and is classified as obsolete. The HEXFET® series component delivers 88W maximum power dissipation and operates across the temperature range of -55°C to 175°C junction temperature.

Due to its obsolete product status, identification of equivalent substitute parts is necessary for design continuity, procurement alternatives, and long-term supply chain management. Substitute parts must maintain electrical compatibility within the specified parameter tolerances while meeting the same mechanical packaging requirements.

Substiute Parts

IRFR3706CPBF

Infineon TechnologiesIn Stock: 916IRFR3706CPBF Datasheet

Current PartRFQ

IRLR024

Vishay SiliconixIn Stock: 16040IRLR024 Datasheet

MFR RecommendedRFQ

IRLR024TR

Vishay SiliconixIn Stock: 4404IRLR024TR Datasheet

MFR RecommendedRFQ

IRLR024TRL

Vishay SiliconixIn Stock: 4475IRLR024TRL Datasheet

MFR RecommendedRFQ

IRLR024TRR

Vishay SiliconixIn Stock: 1029IRLR024TRR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the IRFR3706CPBF are identified based on strict electrical and mechanical compatibility criteria. The primary substitution logic is governed by the following parameters:

Critical Compatibility Parameters:

• Package Type: All substitutes must use TO-252-3 DPAK (2 Leads + Tab) surface mount configuration to ensure mechanical and thermal interface compatibility
• FET Type & Technology: N-Channel MOSFET (Metal Oxide) topology must be maintained
• Drain-to-Source Voltage (Vdss): Substitute devices must equal or exceed 20V rating
• Continuous Drain Current (Id): Substitute devices must equal or exceed 75A at 25°C
• On-State Resistance (Rds On): Lower or equivalent resistance values ensure thermal performance compatibility
• Operating Temperature Range: Substitute devices must support the full -55°C to 175°C junction temperature range or equivalent
• Mounting Type: Surface mount configuration must be identical

The substitute parts identified (IRLR024, IRLR024TR, IRLR024TRL, IRLR024TRR) are all variants of the Vishay Siliconix IRLR024 base product. These parts share identical electrical specifications and packaging, with differences limited to tape-and-reel configurations and product status classifications.

Parameter Comparison

Engineering Selection Recommendations

Product Status Consideration: The IRFR3706CPBF is classified as obsolete. All identified substitute parts (IRLR024, IRLR024TR, IRLR024TRL, IRLR024TRR) are active products from Vishay Siliconix, ensuring ongoing availability and manufacturing support.

Compliance & Certification: The IRFR3706CPBF carries REACH Unaffected status and EAR99 export classification. The substitute IRLR024 variants are classified as RoHS non-compliant. Both the original part and substitutes share identical ECCN (EAR99) and HTSUS (8541.29.0095) classifications.

Inventory Availability: The IRFR3706CPBF has 873 pieces in stock. The IRLR024 variants demonstrate significantly higher availability: IRLR024 (15,998 pcs), IRLR024TR (4,325 pcs), IRLR024TRL (4,400 pcs), and IRLR024TRR (987 pcs).

Variant Selection Among IRLR024 Options: All four IRLR024 variants (IRLR024, IRLR024TR, IRLR024TRL, IRLR024TRR) are electrically and mechanically identical. Selection among these variants is determined by packaging configuration requirements (tape-and-reel specifications) and procurement logistics rather than electrical performance.

Frequently Asked Questions (FAQ)

Q: Can IRLR024 variants directly replace IRFR3706CPBF in existing designs?

A: The IRLR024 variants share identical TO-252-3 DPAK packaging and N-Channel MOSFET topology. However, electrical parameter differences exist. The IRLR024 is rated for 60V Vdss (exceeding the 20V requirement) but delivers only 14A continuous drain current compared to the IRFR3706CPBF's 75A. On-state resistance is higher (100 mOhm vs. 9 mOhm). These differences require circuit-level evaluation to confirm compatibility with the specific application's voltage, current, and thermal requirements.

Q: What is the difference between IRLR024, IRLR024TR, IRLR024TRL, and IRLR024TRR?

A: These four part numbers represent the same base product (IRLR024) with different packaging and tape-and-reel configurations. Electrical specifications and mechanical package dimensions are identical. Selection depends on procurement requirements for bulk quantities and automated assembly processes.

Q: Are there any compliance differences between the original part and substitutes?

A: The IRFR3706CPBF is REACH Unaffected. The IRLR024 variants are RoHS non-compliant. Both share identical ECCN (EAR99) and HTSUS (8541.29.0095) classifications. Applications subject to RoHS requirements must account for this compliance difference.

Q: What is the maximum junction temperature difference between the original and substitute parts?

A: The IRFR3706CPBF operates to 175°C junction temperature. The IRLR024 variants operate to 150°C junction temperature. Applications requiring operation above 150°C junction temperature cannot use the IRLR024 substitutes.

Q: How do the gate charge specifications compare?

A: The IRFR3706CPBF has 35 nC gate charge at 4.5V. The IRLR024 variants have 18 nC gate charge at 5V. Lower gate charge in the substitutes results in faster switching characteristics and reduced gate drive power requirements.

Q: Is the input capacitance difference significant for circuit design?

A: The IRFR3706CPBF has 2410 pF input capacitance at 10V. The IRLR024 variants have 870 pF input capacitance at 25V. The lower input capacitance in the substitutes reduces capacitive loading on gate drive circuits and improves switching speed.

Q: What are the maximum gate voltage ratings?

A: The IRFR3706CPBF accepts ±12V maximum gate voltage. The IRLR024 variants accept ±10V maximum gate voltage. Gate drive circuits must be designed to remain within the ±10V limit when using IRLR024 substitutes.

Q: How do power dissipation ratings compare?

A: The IRFR3706CPBF dissipates 88W maximum at case temperature. The IRLR024 variants dissipate 42W maximum at case temperature. Thermal management designs must account for this reduced power dissipation capability in the substitutes.