MJD31CETF Equivalent & Substitute Parts

Part Overview

The MJD31CETF is an NPN bipolar junction transistor (BJT) manufactured by onsemi, classified as an obsolete product. This transistor was designed for general-purpose switching and amplification applications requiring NPN polarity and moderate current handling capabilities. Due to its obsolete status, direct procurement of the MJD31CETF is limited, necessitating evaluation of equivalent substitute parts that maintain functional compatibility within the MJD31 base product family. Substitute parts are available from active product lines with improved inventory availability and current manufacturing support.

Substiute Parts

MJD31CETF

onsemiIn Stock: 2226MJD31CETF Datasheet

Current PartRFQ

MJD31CT4G

onsemiIn Stock: 35269MJD31CT4G Datasheet

SimilarRFQ

MJD31CUQ-13

Diodes IncorporatedIn Stock: 3553MJD31CUQ-13 Datasheet

DirectRFQ

MJD31CQ-13

Diodes IncorporatedIn Stock: 5416MJD31CQ-13 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MJD31CETF is determined by adherence to the MJD31 base product family designation. All substitute parts listed share the MJD31 base product number, indicating they are engineered variants within the same product platform. Substitutes are grouped based on the following criteria:

Primary Substitution Criteria:

• Base Product Number: MJD31 (common across all alternatives)
• Transistor Type: NPN (functional polarity requirement)
• Package Category: Surface Mount DPAK/TO-252 variants
• Regulatory Compliance: REACH Unaffected status

The substitute parts MJD31CT4G, MJD31CUQ-13, and MJD31CQ-13 are all active or supported product variants within the MJD31 family. These parts maintain the core NPN transistor functionality while offering improved product status, inventory availability, and manufacturing support compared to the obsolete MJD31CETF.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: MJD31CT4G

The MJD31CT4G is the preferred substitute for the obsolete MJD31CETF. This part is manufactured by onsemi (original manufacturer of the MJD31CETF), maintains Active product status, and carries ROHS3 compliance certification. The MJD31CT4G offers the highest inventory availability (35,200 units) and is actively supported for new designs. It is packaged in Cut Tape and Digi-Reel formats, suitable for both manual and automated assembly operations.

Secondary Recommendation: MJD31CUQ-13

The MJD31CUQ-13, manufactured by Diodes Incorporated, is an Active product variant qualified to AEC-Q101 automotive standards. This part is suitable for applications requiring automotive-grade reliability and traceability. It provides 3,467 units in current inventory and is supplied in Tape & Reel packaging. The MJD31CUQ-13 demonstrates superior DC current gain characteristics (25 @ 1A, 4V) compared to other variants.

Tertiary Option: MJD31CQ-13

The MJD31CQ-13 is classified as Not For New Designs but remains available with 5,400 units in inventory. This part should be considered only for legacy system maintenance or repair applications where design continuity with existing assemblies is required. It is not recommended for new product development initiatives.

Frequently Asked Questions (FAQ)

Q: Why is the MJD31CETF listed as obsolete?

A: The MJD31CETF has reached end-of-life status in the onsemi product portfolio. Obsolete designation indicates the manufacturer no longer produces this specific variant. Substitute parts from the active MJD31 product line provide equivalent functionality with ongoing manufacturing support.

Q: Are all substitute parts pin-compatible with the MJD31CETF?

A: All substitute parts listed share the TO-252-3 DPAK package configuration with identical pin assignments (2 Leads + Tab). Physical and electrical pin compatibility is maintained across all variants within the MJD31 base product family.

Q: What is the difference between MJD31CT4G and MJD31CUQ-13?

A: Both parts are NPN transistors with identical maximum ratings (3A collector current, 100V breakdown voltage, 3MHz transition frequency). The primary differences are manufacturer (onsemi vs. Diodes Incorporated), packaging format (Cut Tape/Digi-Reel vs. Tape & Reel), and automotive qualification (MJD31CUQ-13 carries AEC-Q101 certification). Selection depends on supply chain preference and application requirements.

Q: Can MJD31CQ-13 be used in new designs?

A: The MJD31CQ-13 carries a Not For New Designs status, indicating it is in transition toward obsolescence. While currently available, this part should not be selected for new product development. Use MJD31CT4G or MJD31CUQ-13 for new designs to ensure long-term supply continuity.

Q: What packaging options are available for substitutes?

A: MJD31CT4G is supplied in Cut Tape (CT) and Digi-Reel formats. MJD31CUQ-13 and MJD31CQ-13 are supplied in Tape & Reel (TR) format. All parts use the same TO-252-3 DPAK case style, ensuring compatibility with existing PCB footprints and assembly equipment.

Q: Are all substitute parts RoHS compliant?

A: Yes. MJD31CT4G, MJD31CUQ-13, and MJD31CQ-13 all carry ROHS3 Compliant certification. All parts maintain REACH Unaffected status, indicating no conflict with REACH regulatory requirements.