NCP339AFCT2G Equivalent & Substitute Parts

Part Overview

The NCP339AFCT2G is a Power Switch/Driver IC manufactured by onsemi, designed for high-side P-channel switching applications with 1:1 input-to-output ratio. This component operates as a general-purpose power switch with integrated slew rate control and reverse current fault protection. The part is currently classified as obsolete, which necessitates identification of functionally equivalent alternatives for ongoing design support and procurement continuity.

Substiute Parts

NCP339AFCT2G

onsemiIn Stock: 29457NCP339AFCT2G Datasheet

Current PartRFQ

NCP339BFCT2G

onsemiIn Stock: 35186NCP339BFCT2G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the NCP339AFCT2G is determined by strict equivalence across the following critical parameters:

• Output Type & Configuration: P-Channel, High Side switching
• Ratio: 1:1 input-to-output
• Maximum Output Current: 3A
• Load Voltage Range: 1.2V ~ 5.5V
• On-Resistance (Rds On): 18mOhm typical
• Package: 6-WLCSP (1.0x1.5) / 6-UFBGA, WLCSP
• Mounting: Surface Mount
• Temperature Range: -40°C ~ 85°C (TA)
• Fault Protection: Reverse Current
• Interface: On/Off, Non-Inverting

The NCP339BFCT2G meets all electrical and mechanical parameters required for direct substitution. Both parts share identical base product number (NCP339) and are manufactured by onsemi with matching electrical specifications.

Parameter Comparison

Engineering Selection Recommendations

The NCP339BFCT2G is the direct substitute for the obsolete NCP339AFCT2G. Selection of the NCP339BFCT2G is supported by:

• Product Status: Active manufacturing status ensures long-term availability and supply chain continuity
• Electrical Equivalence: Identical electrical specifications across all critical parameters including output current, on-resistance, voltage range, and fault protection
• Compliance: Both parts maintain ROHS3 compliance and REACH unaffected status
• Packaging: Identical 6-WLCSP (1.0x1.5) package ensures mechanical and thermal compatibility
• Moisture Sensitivity: MSL 1 rating provides unlimited shelf life for both parts

The NCP339BFCT2G includes Load Discharge as an additional feature not specified in the NCP339AFCT2G, which provides enhanced functionality without compromising compatibility.

Frequently Asked Questions (FAQ)

Q: Can NCP339BFCT2G be used as a direct replacement for NCP339AFCT2G in existing designs?

A: Yes. The NCP339BFCT2G meets all electrical and mechanical specifications of the NCP339AFCT2G. Both parts share identical output current (3A), on-resistance (18mOhm), load voltage range (1.2V ~ 5.5V), package (6-WLCSP), and operating temperature range (-40°C ~ 85°C).

Q: What is the primary reason for substitution?

A: The NCP339AFCT2G is classified as obsolete. The NCP339BFCT2G is an active product from the same manufacturer with equivalent electrical and mechanical specifications, ensuring design continuity and supply availability.

Q: Are there packaging differences between these parts?

A: No. Both parts use the 6-WLCSP (1.0x1.5) package with 6-UFBGA, WLCSP case designation. PCB layout and thermal management considerations remain identical.

Q: Do compliance certifications differ between the parts?

A: No. Both parts are ROHS3 compliant, REACH unaffected, and carry MSL 1 (unlimited shelf life) ratings.

Q: What additional features does NCP339BFCT2G provide?

A: The NCP339BFCT2G includes Load Discharge functionality in addition to the slew rate control and reverse current fault protection present in both parts.