2SC4081-C-TP Equivalent & Substitute Parts

Part Overview

The 2SC4081-C-TP is a Surface Mount NPN Bipolar Junction Transistor manufactured by Micro Commercial Co, rated for 50V collector-emitter breakdown voltage and 150mA maximum collector current. This device is packaged in SOT-323 (SC-70) and is designed for general-purpose switching and amplification applications requiring 200mW power dissipation capability.

The 2SC4081-C-TP is classified as Obsolete. Equivalent and substitute parts are necessary to maintain design continuity and ensure component availability for production, repair, and redesign applications where the original part is no longer readily procurable from the original manufacturer.

Substiute Parts

2SC4081-C-TP

Micro Commercial CoIn Stock: 7132SC4081-C-TP Datasheet

Current PartRFQ

2PC4081S,115

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

DirectRFQ

2PC4081R,135

Nexperia USA Inc.In Stock: 108832PC4081R,135 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 2SC4081-C-TP is determined by strict equivalence across the following critical electrical and mechanical parameters:

Electrical Equivalence Criteria:

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

Mechanical Equivalence Criteria:

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

The substitute parts identified below meet all electrical specifications and mechanical requirements. Variations in transition frequency (180MHz vs. 100MHz) and DC current gain specifications (270 vs. 180 minimum) represent acceptable deviations within the functional scope of general-purpose switching applications, provided the application does not require the specific higher frequency performance of the original part.

Parameter Comparison

Engineering Selection Recommendations

2PC4081S,115 (Nexperia USA Inc.)

This substitute part is classified as Active product status, ensuring long-term availability and supply chain continuity. The 2PC4081S,115 meets all critical electrical parameters of the 2SC4081-C-TP, including voltage, current, power dissipation, and saturation characteristics. The part carries Automotive grade qualification with AEC-Q101 certification, indicating compliance with automotive industry reliability standards. ROHS3 compliance and REACH Unaffected status confirm environmental and regulatory alignment. The transition frequency of 100MHz is lower than the original 180MHz specification; applications requiring the higher frequency performance of the original part should be evaluated against actual circuit requirements.

2PC4081R,135 (Nexperia USA Inc.)

This substitute part is classified as Active product status with equivalent long-term availability. The 2PC4081R,135 meets all critical electrical parameters with the exception of DC current gain minimum specification, which is 180 @ 1mA, 6V compared to 270 @ 1mA, 6V for the original part. This represents a lower gain specification and should be evaluated in applications where DC current gain is a critical design parameter. The part carries Automotive grade qualification with AEC-Q101 certification. ROHS3 compliance and REACH Unaffected status confirm environmental and regulatory alignment. The transition frequency of 100MHz is lower than the original 180MHz specification.

Both substitute parts are manufactured by Nexperia USA Inc., a recognized semiconductor manufacturer with established quality and reliability standards. Selection between 2PC4081S,115 and 2PC4081R,135 should be based on DC current gain requirements specific to the application circuit.

Frequently Asked Questions (FAQ)

Q: Can the 2PC4081S,115 or 2PC4081R,135 be used as direct replacements for the 2SC4081-C-TP in existing designs?

A: Both parts are mechanically and electrically compatible for general-purpose switching and amplification applications. The SOT-323 package and Surface Mount configuration are identical. All critical electrical parameters including voltage rating, current rating, power dissipation, and saturation characteristics are equivalent. The transition frequency difference (100MHz vs. 180MHz) and DC current gain variation (particularly for 2PC4081R,135) should be evaluated against specific circuit requirements.

Q: What is the significance of the DC current gain difference between 2PC4081S,115 and 2PC4081R,135?

A: The 2PC4081S,115 maintains the original 270 minimum DC current gain specification @ 1mA, 6V, while the 2PC4081R,135 specifies 180 minimum. In circuits where base current drive is limited or where gain-dependent biasing is employed, the lower gain of 2PC4081R,135 may result in reduced collector current or different operating point. Applications should be analyzed to determine if the lower gain specification is acceptable.

Q: Why is the transition frequency lower in the substitute parts?

A: The 2PC4081S,115 and 2PC4081R,135 specify 100MHz transition frequency compared to 180MHz for the 2SC4081-C-TP. This difference reflects the specific semiconductor process and design of the Nexperia parts. For applications operating at frequencies significantly below 100MHz, this difference is not functionally significant. Applications requiring operation near or above 100MHz should be evaluated against actual circuit frequency requirements.

Q: Are the substitute parts qualified for automotive applications?

A: Both 2PC4081S,115 and 2PC4081R,135 carry Automotive grade designation with AEC-Q101 qualification. The original 2SC4081-C-TP does not specify automotive qualification. If automotive qualification is a design requirement, the substitute parts provide this additional certification.

Q: What is the packaging difference between the main part and substitutes?

A: The main part 2SC4081-C-TP is supplied in standard packaging configuration. The substitute parts 2PC4081S,115 and 2PC4081R,135 are supplied in Tape & Reel (TR) packaging. Both use identical SOT-323 component packages suitable for automated surface mount assembly. Tape & Reel packaging is standard for high-volume production environments.

Q: Are there any compliance or regulatory differences?

A: All three parts are ROHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity rating. The substitute parts specify REACH Unaffected status, confirming compliance with REACH regulations. Environmental and regulatory compliance is equivalent across all three parts.