MSCD120-12 Equivalent & Substitute Parts

Part Overview

The MSCD120-12 is a diode module manufactured by Microsemi Corporation, classified as a rectifier diode array with a 1 pair series connection configuration. This component is rated for 1200 V DC reverse voltage and 120 A average rectified current per diode, designed for chassis mount applications in the D1 package.

The MSCD120-12 is currently listed as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production and maintenance requirements for systems utilizing this component.

Substiute Parts

MSCD120-12

Microsemi CorporationIn Stock: 1097MSCD120-12 Datasheet

Current PartRFQ

MDD95-12N1B

IXYSIn Stock: 3875MDD95-12N1B Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MSCD120-12 is based on electrical and mechanical parameter equivalence. The following criteria determine substitutability:

Electrical Parameters (Critical):

• Voltage - DC Reverse (Vr) (Max): 1200 V
• Current - Average Rectified (Io) (per Diode): 120 A
• Voltage - Forward (Vf) (Max) @ If: 1.43 V @ 300 A
• Speed: Standard Recovery >500ns, > 200mA (Io)
• Diode Configuration: 1 Pair Series Connection

Mechanical Parameters (Critical):

• Mounting Type: Chassis Mount
• Technology: Standard

Compliance Parameters:

• REACH Status: REACH Unaffected
• ECCN: EAR99
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

The MDD95-12N1B meets all critical electrical and mechanical parameters. Package differences (D1 versus TO-240AA) represent a physical form factor change that requires mechanical design verification but do not affect electrical substitutability.

Parameter Comparison

Engineering Selection Recommendations

The MDD95-12N1B manufactured by IXYS is electrically equivalent to the MSCD120-12 across all critical voltage, current, and recovery speed parameters. Both components are rated for 1200 V reverse voltage and 120 A average rectified current with identical forward voltage characteristics.

The MDD95-12N1B holds active product status, ensuring ongoing availability and manufacturer support, whereas the MSCD120-12 is obsolete. The MDD95-12N1B is RoHS3 compliant and maintains REACH Unaffected and EAR99 compliance status consistent with the original part.

The primary design consideration is the package form factor change from D1 to TO-240AA. This difference requires mechanical design review to confirm mounting compatibility, thermal interface requirements, and board layout accommodation. The reverse leakage current specification for the MDD95-12N1B is 15 mA at 1200 V, compared to 6 mA for the MSCD120-12, representing a higher leakage characteristic that must be evaluated within the application's thermal and power dissipation budget.

Frequently Asked Questions (FAQ)

Q: Can the MDD95-12N1B directly replace the MSCD120-12 without design changes?

A: The MDD95-12N1B is electrically equivalent in voltage, current, and recovery speed specifications. However, the package form factor differs (TO-240AA versus D1), requiring mechanical design verification for mounting compatibility and thermal interface confirmation before implementation.

Q: What is the significance of the reverse leakage current difference between these parts?

A: The MDD95-12N1B exhibits 15 mA reverse leakage at 1200 V compared to 6 mA for the MSCD120-12. This higher leakage generates additional heat dissipation in the application. Thermal analysis is required to confirm the design can accommodate this increased leakage without exceeding junction temperature limits.

Q: Are there compliance or regulatory differences between these parts?

A: Both parts maintain identical REACH Unaffected and EAR99 compliance status. The MDD95-12N1B is RoHS3 compliant, providing enhanced environmental compliance compared to the obsolete MSCD120-12.

Q: What does the package designation change from D1 to TO-240AA mean for my application?

A: D1 and TO-240AA are different physical package styles for chassis mount diode modules. The TO-240AA package may have different mounting hole patterns, thermal interface dimensions, and board footprint requirements. Mechanical drawings and mounting specifications must be reviewed to confirm physical compatibility with existing designs.

Q: Is the MDD95-12N1B available in sufficient quantity for production?

A: The MDD95-12N1B is listed as active product status with 3800 pieces in stock, providing supply availability for production requirements. The MSCD120-12 is obsolete with limited remaining inventory.

Q: Are the forward voltage characteristics identical between these parts?

A: Yes, both parts specify 1.43 V maximum forward voltage at 300 A, ensuring equivalent voltage drop performance in rectification applications.