IRLU110 N-Channel MOSFET Equivalent & Substitute Parts

Part Overview

The IRLU110 is an N-Channel MOSFET manufactured by Vishay Siliconix, rated for 100V drain-to-source voltage with 4.3A continuous drain current at 25°C. The device is housed in a TO-251AA (IPak) through-hole package and is currently in active product status. This component is used in switching applications requiring moderate current handling and voltage isolation in industrial, consumer, and automotive circuits.

Substitute parts are identified when equivalent electrical performance can be achieved within the specified parameter ranges, or when design requirements permit operation with enhanced specifications. Substitution becomes necessary due to inventory constraints, manufacturing discontinuation, or design optimization requirements.

Substiute Parts

IRLU110

Vishay SiliconixIn Stock: 15313IRLU110 Datasheet

Current PartRFQ

IRLU110PBF

Vishay SiliconixIn Stock: 15514IRLU110PBF Datasheet

Parametric EquivalentRFQ

IRLU120NPBF

Infineon TechnologiesIn Stock: 15473IRLU120NPBF Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the IRLU110 are classified into two categories based on electrical equivalence and design compatibility:

Parametric Equivalent (Direct Replacement): Parts that maintain identical electrical specifications across all critical parameters, including Vdss, Id, Rds On, and thermal characteristics. These substitutes are pin-compatible and require no circuit modifications.

Direct Manufacturer Equivalent (Enhanced Performance): Parts that exceed the minimum electrical requirements of the IRLU110 while maintaining the same package footprint and pin configuration. These substitutes provide improved performance characteristics such as higher current capacity or lower on-state resistance, and are suitable for applications where enhanced specifications do not create design conflicts.

Substitution eligibility is determined by the following key parameters:

• Drain-to-Source Voltage (Vdss) ≥ 100V
• Continuous Drain Current (Id) ≥ 4.3A
• Package Type: TO-251AA (IPak) through-hole
• FET Type: N-Channel MOSFET
• Gate Threshold Voltage (Vgs(th)) ≤ 2V
• Operating Temperature Range: minimum -55°C to 150°C

Parameter Comparison

Engineering Selection Recommendations

IRLU110PBF (Parametric Equivalent): This part is the direct replacement for IRLU110, offering identical electrical specifications and package configuration. The primary distinction is packaging format (tube versus bulk) and RoHS3 compliance status. IRLU110PBF is recommended for applications requiring regulatory compliance with environmental standards. Both parts are in active product status and suitable for new designs.

IRLU120NPBF (Enhanced Performance Substitute): This part exceeds the electrical requirements of IRLU110 with 10A continuous drain current (versus 4.3A), lower on-state resistance (185 mOhm versus 540 mOhm), and higher power dissipation capability (48W versus 25W). The IRLU120NPBF is manufactured by Infineon Technologies and carries ROHS3 compliance. However, this part is designated "Not For New Designs," indicating manufacturer discontinuation or transition status. The IRLU120NPBF is suitable only for legacy system maintenance or applications where enhanced performance specifications do not create thermal or circuit design conflicts. The higher gate charge (20 nC versus 6.1 nC) and input capacitance (440 pF versus 250 pF) may require driver circuit evaluation in high-frequency switching applications.

For new product designs, IRLU110PBF is the preferred substitute. For existing systems currently using IRLU110, IRLU120NPBF provides performance headroom but requires verification of thermal management and driver compatibility.

Frequently Asked Questions (FAQ)

Q: Can IRLU110PBF be used as a direct replacement for IRLU110?

A: Yes. IRLU110PBF is a parametric equivalent with identical electrical specifications, gate threshold voltage, on-state resistance, and thermal ratings. The parts are pin-compatible and require no circuit modifications. The primary difference is packaging format and RoHS3 compliance status of IRLU110PBF.

Q: What are the limitations of using IRLU120NPBF as a substitute?

A: IRLU120NPBF exceeds the electrical specifications of IRLU110 but carries "Not For New Designs" status from the manufacturer. The higher gate charge (20 nC versus 6.1 nC) and input capacitance (440 pF versus 250 pF) may require evaluation of gate driver circuits, particularly in applications operating above 100 kHz switching frequency. Thermal management must be verified to ensure the enhanced power dissipation capability does not create design conflicts.

Q: Are all substitute parts available in the same TO-251AA package?

A: Yes. IRLU110, IRLU110PBF, and IRLU120NPBF are all housed in the TO-251AA (IPak) through-hole package with identical pin configuration and footprint. No PCB layout modifications are required for substitution.

Q: What is the significance of RoHS compliance in selecting a substitute?

A: IRLU110 is RoHS non-compliant, while IRLU110PBF and IRLU120NPBF are ROHS3 compliant. For applications subject to environmental regulations or customer requirements mandating RoHS compliance, IRLU110PBF or IRLU120NPBF must be selected. For legacy systems without compliance requirements, IRLU110 remains acceptable.

Q: Can IRLU120NPBF be used in high-frequency switching applications?

A: IRLU120NPBF has higher gate charge (20 nC) and input capacitance (440 pF) compared to IRLU110 (6.1 nC and 250 pF respectively). In applications operating above 100 kHz, the gate driver circuit must be evaluated to confirm adequate drive capability and switching speed performance. Lower gate charge and capacitance of IRLU110 or IRLU110PBF may be preferable for high-frequency designs.

Q: What is the operating temperature difference between IRLU110 and IRLU120NPBF?

A: IRLU110 operates from -55°C to 150°C junction temperature, while IRLU120NPBF extends to -55°C to 175°C. The 25°C additional upper temperature rating of IRLU120NPBF provides thermal margin in high-ambient or high-power applications, but does not affect substitution compatibility for standard operating ranges.

Q: Is IRLU120NPBF recommended for new product designs?

A: No. IRLU120NPBF carries "Not For New Designs" status, indicating manufacturer transition or discontinuation. For new designs, IRLU110PBF is the recommended substitute, as it maintains active product status and offers RoHS3 compliance without introducing obsolescence risk.