2PC4081S-QX Equivalent & Substitute Parts

Part Overview

The 2PC4081S-QX is an NPN bipolar junction transistor manufactured by Nexperia USA Inc. in the SOT-323 surface mount package. This component is designed for general-purpose switching and amplification applications requiring low-power operation at moderate voltage levels. The device is classified as Active product status and carries automotive-grade qualification under AEC-Q101 standards. Substitute parts are identified when equivalent electrical and mechanical parameters are required for design flexibility, inventory management, or supply chain continuity while maintaining functional compatibility within specified operating conditions.

Substiute Parts

2PC4081S-QX

Nexperia USA Inc.In Stock: 11152PC4081S-QX Datasheet

Current PartRFQ

2PC4081S,115

Nexperia USA Inc.In Stock: 312172PC4081S,115 Datasheet

Parametric EquivalentRFQ

2PC4081S,135

NXP USA Inc.In Stock: 1609582PC4081S,135 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 2PC4081S-QX are identified based on strict electrical and mechanical parameter equivalence. The substitution logic is based on the following critical parameters:

Electrical Parameters (Must Match):

• Transistor Type: NPN
• Current - Collector (Ic) (Max): 150 mA
• Voltage - Collector Emitter Breakdown (Max): 50 V
• Vce Saturation (Max) @ Ib, Ic: 400mV @ 5mA, 50mA
• Current - Collector Cutoff (Max): 100nA (ICBO)
• DC Current Gain (hFE) (Min) @ Ic, Vce: 270 @ 1mA, 6V
• Power - Max: 200 mW
• Frequency - Transition: 100MHz
• Operating Temperature (TJ): 150°C

Mechanical Parameters (Must Match):

• Package / Case: SC-70, SOT-323
• Mounting Type: Surface Mount

Compliance Parameters (Must Match):

• Grade: Automotive
• Qualification: AEC-Q101
• RoHS Status: ROHS3 Compliant

All identified substitute parts maintain identical electrical specifications, package configuration, and automotive qualification requirements. Variations in packaging format (Tape & Reel versus Bulk) do not affect functional equivalence and represent alternative supply chain options.

Parameter Comparison

Engineering Selection Recommendations

All identified substitute parts—2PC4081S,115 and 2PC4081S,135—are direct parametric equivalents to the 2PC4081S-QX. Selection among these parts is based on the following engineering criteria:

Product Status: All three parts maintain Active product status, ensuring continued availability and manufacturer support.

Compliance & Certification: All substitute parts carry identical automotive-grade qualification under AEC-Q101 standards and maintain ROHS3 compliance, satisfying regulatory requirements for automotive and industrial applications.

Packaging Considerations: The 2PC4081S-QX and 2PC4081S,115 are supplied in Tape & Reel format, suitable for automated assembly processes. The 2PC4081S,135 is supplied in Bulk packaging, appropriate for manual assembly or alternative supply chain workflows. Packaging format selection depends on production methodology and inventory management requirements rather than functional performance.

Electrical Equivalence: All three parts exhibit identical electrical characteristics across all specified parameters, including collector current, breakdown voltage, saturation characteristics, current gain, power dissipation, and transition frequency. No performance differentiation exists between these parts in circuit operation.

Supply Chain Flexibility: The availability of multiple equivalent part numbers provides design flexibility and supply chain resilience. Selection can be based on inventory availability, lead time, or supplier preference without compromising circuit performance or reliability.

Frequently Asked Questions (FAQ)

Q: Can 2PC4081S,115 be used as a direct replacement for 2PC4081S-QX in automotive applications?

A: Yes. Both parts are automotive-grade NPN transistors with AEC-Q101 qualification, identical electrical specifications, and SOT-323 surface mount packaging. They are functionally interchangeable in all automotive circuit applications.

Q: What is the difference between the Tape & Reel and Bulk packaging formats?

A: Tape & Reel packaging is optimized for automated surface mount assembly processes, where components are fed directly into pick-and-place equipment. Bulk packaging is used for manual assembly, kit assembly, or alternative supply workflows. The electrical and mechanical properties of the transistor remain identical regardless of packaging format.

Q: Are all three parts suitable for high-frequency switching applications?

A: Yes. All three parts—2PC4081S-QX, 2PC4081S,115, and 2PC4081S,135—have a transition frequency of 100MHz, making them suitable for switching applications within this frequency range.

Q: Do the substitute parts maintain the same thermal characteristics?

A: Yes. All three parts have identical maximum operating junction temperature (TJ) of 150°C and maximum power dissipation of 200 mW. Thermal performance is equivalent across all substitute parts.

Q: Can these parts be used interchangeably in existing PCB designs?

A: Yes. All three parts use the identical SC-70/SOT-323 surface mount package with the same pinout and footprint. No PCB redesign is required when substituting between these parts.

Q: What compliance standards apply to all substitute parts?

A: All three parts are ROHS3 compliant and REACH unaffected. They carry automotive-grade classification with AEC-Q101 qualification, meeting requirements for automotive and industrial applications.

Q: Is there a performance difference between parts from Nexperia USA Inc. and NXP USA Inc.?

A: No. Both manufacturers are part of the same corporate entity. All electrical specifications, automotive qualification, and compliance certifications are identical. The parts are functionally equivalent.