IRFD9120 P-Channel MOSFET Equivalent & Substitute Parts

Part Overview

The IRFD9120 is a P-Channel Metal Oxide Semiconductor Field Effect Transistor (MOSFET) rated for 100V drain-to-source voltage with 1A continuous drain current capability. This device is packaged in a 4-HVMDIP through-hole configuration and is designed for general-purpose switching and amplification applications requiring P-channel functionality.

The IRFD9120 carries an obsolete product status, making identification of functionally equivalent alternatives necessary for ongoing design support, maintenance, and production continuity. Direct substitutes with identical electrical and mechanical specifications are available in active product lines.

Substiute Parts

IRFD9120

Vishay SiliconixIn Stock: 16405IRFD9120 Datasheet

Current PartRFQ

IRFD9120PBF

Vishay SiliconixIn Stock: 23044IRFD9120PBF Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the IRFD9120 is determined by strict equivalence across all electrical and mechanical parameters. The substitute part must satisfy the following criteria:

Electrical Parameters (Must Match):

• FET Type: P-Channel
• Drain to Source Voltage (Vdss): 100V
• Continuous Drain Current (Id): 1A @ 25°C
• On-State Resistance (Rds On): 600mOhm @ 600mA, 10V
• Gate Threshold Voltage (Vgs(th)): 4V @ 250µA
• Gate Charge (Qg): 18nC @ 10V
• Input Capacitance (Ciss): 390pF @ 25V
• Power Dissipation: 1.3W
• Operating Temperature Range: -55°C to 175°C

Mechanical Parameters (Must Match):

• Mounting Type: Through Hole
• Package / Case: 4-DIP (0.300", 7.62mm)
• Supplier Device Package: 4-HVMDIP

The IRFD9120PBF meets all specified criteria and is classified as a direct manufacturer equivalent with identical electrical performance and mechanical compatibility.

Parameter Comparison

Engineering Selection Recommendations

The IRFD9120PBF is the direct functional equivalent of the IRFD9120 with complete electrical and mechanical compatibility. Selection between these parts is determined by regulatory and supply chain requirements:

IRFD9120PBF Selection Criteria:

• Active product status ensures ongoing availability and supply chain continuity
• ROHS3 compliance satisfies current environmental and regulatory requirements for new designs and production
• Identical electrical specifications and 4-DIP package footprint enable direct board-level substitution without circuit modification
• Tube packaging provides standard handling and storage compatibility with modern component management systems

IRFD9120 Retention Criteria:

• Existing inventory of the obsolete IRFD9120 may be utilized for maintenance and repair of legacy equipment where RoHS compliance is not mandated
• Historical design documentation and qualification records specific to IRFD9120 remain valid for the IRFD9120PBF due to complete parameter equivalence

For new designs, production restarts, and systems requiring regulatory compliance, the IRFD9120PBF is the appropriate selection.

Frequently Asked Questions (FAQ)

Q: Can the IRFD9120PBF be used as a direct replacement for the IRFD9120 in existing circuits?

A: Yes. The IRFD9120PBF is electrically and mechanically identical to the IRFD9120. All electrical parameters, including Vdss, Id, Rds On, Vgs(th), gate charge, and input capacitance are equivalent. The 4-DIP through-hole package footprint is identical, enabling direct board-level substitution without circuit redesign or PCB modification.

Q: What is the difference between IRFD9120 and IRFD9120PBF?

A: The primary differences are product status and RoHS compliance. The IRFD9120 is obsolete and RoHS non-compliant. The IRFD9120PBF is an active product with ROHS3 compliance. All electrical and mechanical specifications are identical.

Q: Why is the IRFD9120 listed as obsolete?

A: The IRFD9120 has been superseded by the IRFD9120PBF in the active product portfolio. The PBF variant meets current environmental regulations and is the recommended part for all new designs and ongoing production.

Q: Are there any package or pinout differences between these parts?

A: No. Both parts use the 4-DIP (0.300", 7.62mm) through-hole package with the 4-HVMDIP supplier configuration. Pinout and mechanical dimensions are identical.

Q: What does ROHS3 compliance mean for the IRFD9120PBF?

A: ROHS3 compliance indicates the IRFD9120PBF meets the Restriction of Hazardous Substances Directive 3 requirements, restricting the use of specific hazardous materials in electrical and electronic equipment. This certification is required for products sold in the European Union and many other regulated markets.

Q: Can I use the IRFD9120PBF in applications originally designed for the IRFD9120?

A: Yes. The IRFD9120PBF is fully compatible with all applications designed for the IRFD9120. Electrical performance, thermal characteristics, and switching behavior are identical. No circuit modifications or design changes are required.

Q: What is the inventory status of these parts?

A: The IRFD9120 has 16,361 pieces in stock as new original inventory. The IRFD9120PBF has 23,030 pieces in stock as new original inventory. Both are available for immediate procurement.