IRL3714L Equivalent & Substitute Parts

Part Overview

The IRL3714L is an N-Channel MOSFET manufactured by Infineon Technologies, rated for 20V drain-to-source voltage with 36A continuous drain current in a Through Hole TO-262 package. This device is classified as Obsolete, necessitating identification of functionally equivalent alternatives for ongoing design support and procurement continuity. The part operates across a temperature range of -55°C to 175°C and dissipates up to 47W at the case temperature.

Substiute Parts

IRL3714L

Infineon TechnologiesIn Stock: 736IRL3714L Datasheet

Current PartRFQ

IRFZ14L

Vishay SiliconixIn Stock: 687IRFZ14L Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the IRL3714L requires evaluation against the following critical parameters:

Mandatory Compatibility Criteria:

• FET Type: N-Channel topology
• Package Type: TO-262-3 Through Hole configuration
• Operating Temperature Range: -55°C to 175°C (TJ)
• Drain-to-Source Voltage (Vdss): Equal to or greater than 20V
• Continuous Drain Current (Id): Equal to or greater than 36A at 25°C
• On-Resistance (Rds On): Equal to or lower than 20 mOhm @ specified conditions
• Gate Threshold Voltage: Compatible with 3V maximum specification
• Power Dissipation: Minimum 47W at case temperature

The IRFZ14L from Vishay Siliconix does not meet the mandatory substitution criteria. While it shares the same package type (TO-262-3) and operating temperature range, it exhibits a Drain-to-Source Voltage of 60V and a Continuous Drain Current of only 10A, both of which fall outside the acceptable substitution parameters for the IRL3714L. The on-resistance specification of 200 mOhm also exceeds the maximum allowable 20 mOhm threshold.

Parameter Comparison

Engineering Selection Recommendations

The IRFZ14L does not qualify as a functional equivalent or substitute for the IRL3714L based on the provided electrical parameters. The primary disqualifying factors are:

1. Continuous Drain Current Deficit: The IRFZ14L is rated for 10A continuous drain current, which is 26A below the IRL3714L requirement of 36A. This represents a 72% reduction in current-handling capacity.

2. On-Resistance Specification Mismatch: The IRFZ14L exhibits an on-resistance of 200 mOhm compared to the IRL3714L's 20 mOhm specification. This 10-fold increase in on-resistance will result in significantly higher power dissipation and thermal stress in equivalent circuit applications.

3. Power Dissipation Inadequacy: The IRFZ14L's maximum power dissipation of 43W (Tc) falls below the IRL3714L's 47W specification, further limiting its suitability for high-current applications.

Both devices share identical RoHS non-compliance status, Moisture Sensitivity Level 1, and operating temperature range, which provides no differentiation advantage.

For applications requiring the IRL3714L, direct replacement with the IRFZ14L will result in circuit performance degradation and potential thermal failure. Alternative N-Channel MOSFETs with matching or superior electrical specifications and TO-262-3 packaging must be evaluated independently.

Frequently Asked Questions (FAQ)

Q: Can the IRFZ14L replace the IRL3714L in existing designs?

A: No. The IRFZ14L cannot replace the IRL3714L. The IRFZ14L is rated for 10A continuous drain current versus the IRL3714L's 36A requirement. Additionally, the IRFZ14L's on-resistance of 200 mOhm exceeds the IRL3714L's 20 mOhm specification by a factor of 10. These differences will cause circuit malfunction and thermal failure.

Q: Are the packages physically compatible?

A: Both devices use the TO-262-3 Through Hole package with identical mechanical dimensions. Physical installation is possible; however, electrical incompatibility makes functional substitution invalid.

Q: What is the primary reason the IRL3714L is obsolete?

A: The IRL3714L is classified as Obsolete by Infineon Technologies. Procurement of this device requires identification of functionally equivalent alternatives that meet the same electrical specifications and performance requirements.

Q: What parameters must a substitute part match?

A: A valid substitute must meet or exceed the following specifications: N-Channel FET topology, 20V minimum Vdss, 36A minimum continuous drain current at 25°C, 20 mOhm maximum on-resistance, TO-262-3 package, and -55°C to 175°C operating temperature range.

Q: How does the on-resistance difference affect circuit performance?

A: On-resistance directly determines power dissipation in the conducting state. The IRFZ14L's 200 mOhm on-resistance versus the IRL3714L's 20 mOhm will produce 10 times higher resistive losses at equivalent current levels, resulting in excessive heat generation and potential device failure.

Q: Are there compliance or certification differences between these parts?

A: Both devices are RoHS non-compliant and carry identical Moisture Sensitivity Level 1 ratings. No compliance advantage exists between the two parts.