Equivalent & Substitute Parts for 2SC4138

Part Overview

The 2SC4138 is an NPN bipolar junction transistor (BJT) with a maximum collector-emitter voltage of 400 V, a collector current rating of 10 A, and a maximum power dissipation of 80 W. Packaged in the TO-3P-3 case, this device is intended for through-hole mounting and features a transition frequency of 10 MHz, suitable for high-power switching applications. The product is classified as obsolete, making the identification of suitable equivalent transistors necessary for maintenance, repair, or redesign of existing equipment using this component.

Substiute Parts

2SC4138

Sanken Electric USA Inc.In Stock: 23712SC4138 Datasheet

Current PartRFQ

BUV48A

STMicroelectronicsIn Stock: 2720BUV48A Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Equivalent and substitute transistor selection is based strictly on matching or exceeding the following key parameters: transistor type (NPN), maximum collector current (Ic), maximum collector-emitter breakdown voltage (Vce), maximum power dissipation, mounting type, and package compatibility. Compliance with RoHS and MSL 1 (Unlimited) is also essential for direct replacement. Only part numbers with these explicit parameter matches are considered valid substitutes.

Parameter Comparison

Engineering Selection Recommendations

For selection purposes, both the 2SC4138 and its substitute BUV48A have comparable regulatory statuses, including ECCN (EAR99), RoHS compliance, and MSL rating of 1 (Unlimited). The 2SC4138 is labeled as obsolete, necessitating substitution for ongoing designs, repairs, or replacements. The BUV48A is marked "Not For New Designs" but meets the necessary compliance parameters and is available in original stock.

Frequently Asked Questions (FAQ)

Q1: What are the primary criteria for selecting a substitute for 2SC4138 in the Transistors, Bipolar (BJT) category?
A: The selection criteria include matching transistor polarity (NPN), collector current rating, collector-emitter breakdown voltage, device power dissipation, mounting type, package compatibility, and regulatory statuses such as RoHS compliance and MSL rating.

Q2: Are package differences between TO-3P and TO-247-3 significant for direct substitution?
A: Package differences require physical compatibility verification with existing board layouts and thermal management. Both packages support through-hole mounting, but mechanical dimensions should match the application requirements.

Q3: Can parts with higher Ic or Vce ratings be used as substitutes?
A: Yes, as long as other parameters relevant to system operation, mounting type, and package compatibility are maintained, higher Ic or Vce provide sufficient headroom.

Q4: Is the BUV48A a compliant substitute in terms of RoHS and MSL?
A: Yes, both 2SC4138 and BUV48A are RoHS compliant and rated at MSL 1 (Unlimited), meeting standard regulatory requirements for substitution.