MSMBJ48CA Equivalent & Substitute Parts

Part Overview

The MSMBJ48CA is a transient voltage suppressor (TVS) diode manufactured by Microchip Technology, designed for general-purpose overvoltage protection in surface-mount applications. This bidirectional Zener diode features a 48V reverse standoff voltage with a maximum clamping voltage of 77.4V at peak pulse current. The component is housed in a DO-214AA (SMB) package and is qualified to MIL-PRF-19500 military standards. With an active product status and 881 pieces currently in stock, the MSMBJ48CA serves as a primary reference for identifying functionally equivalent alternatives in the TVS diode category.

Substitute parts are identified when electrical parameters, mechanical packaging, and operational characteristics align with the main part specifications, enabling direct replacement in circuit designs without performance degradation.

Substiute Parts

MSMBJ48CA

Microchip TechnologyIn Stock: 959MSMBJ48CA Datasheet

Current PartRFQ

SMBJ48CA-13

Diodes IncorporatedIn Stock: 944SMBJ48CA-13 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MSMBJ48CA are identified based on strict equivalence of the following critical parameters:

• Voltage Rating: Reverse standoff voltage of 48V, breakdown voltage minimum of 53.3V, and clamping voltage maximum of 77.4V
• Current Handling: Peak pulse current of 7.7A at 10/1000µs pulse duration
• Power Dissipation: Peak pulse power rating of 600W
• Package Configuration: DO-214AA (SMB) surface-mount package
• Diode Type: Bidirectional Zener topology with single channel
• Electrical Characteristics: General-purpose transient voltage suppression without power line protection

Substitution is valid when all electrical parameters remain within the specified ranges and the mechanical package accommodates the same PCB footprint and mounting requirements. Operating temperature range variations are noted but do not preclude substitution when the application temperature envelope is contained within the substitute part's rated range.

Parameter Comparison

Engineering Selection Recommendations

The SMBJ48CA-13 from Diodes Incorporated is electrically and mechanically equivalent to the MSMBJ48CA across all critical transient voltage suppression parameters. Both devices share identical voltage ratings, current handling capacity, power dissipation capability, and surface-mount SMB package configuration.

Operational Temperature Consideration: The MSMBJ48CA operates across -65°C to 150°C, while the SMBJ48CA-13 operates across -55°C to 150°C. The substitute part has a narrower low-temperature range. Substitution is valid for applications where the minimum operating temperature does not fall below -55°C.

Product Status: The MSMBJ48CA maintains active product status with current inventory availability. The SMBJ48CA-13 is discontinued at DiGi Electronics, indicating limited future availability. For new designs or long-term production requirements, the MSMBJ48CA is the preferred selection. For existing designs currently using the SMBJ48CA-13, the MSMBJ48CA provides a direct functional replacement.

Compliance: Both parts are RoHS non-compliant and carry identical REACH and ECCN classifications. No compliance advantage exists between the two options.

Frequently Asked Questions (FAQ)

Q: Can the SMBJ48CA-13 directly replace the MSMBJ48CA in existing designs?

A: Yes, the SMBJ48CA-13 is a direct electrical and mechanical substitute for the MSMBJ48CA. All voltage ratings, current specifications, power dissipation, and package dimensions are identical. The devices are pin-compatible and footprint-compatible for surface-mount PCB assembly.

Q: What is the difference in operating temperature range between these parts?

A: The MSMBJ48CA operates from -65°C to 150°C, while the SMBJ48CA-13 operates from -55°C to 150°C. The MSMBJ48CA supports a 10°C lower minimum temperature. For applications requiring operation below -55°C, the MSMBJ48CA is required. For applications within -55°C to 150°C, both parts are functionally equivalent.

Q: Are there any package or footprint differences?

A: No. Both the MSMBJ48CA and SMBJ48CA-13 use the DO-214AA (SMB) surface-mount package. PCB footprints, lead spacing, and mounting requirements are identical.

Q: Why is the SMBJ48CA-13 listed as discontinued?

A: The SMBJ48CA-13 is discontinued at DiGi Electronics, indicating that this specific part number is no longer actively stocked or produced by the distributor. This does not necessarily indicate manufacturer discontinuation, but rather limited market availability through primary distribution channels.

Q: What electrical parameters must match for substitution?

A: For TVS diode substitution, the following parameters must be equivalent: reverse standoff voltage (48V), breakdown voltage minimum (53.3V), clamping voltage maximum at peak pulse current (77.4V), peak pulse current (7.7A), and peak pulse power (600W). All of these parameters are identical between the MSMBJ48CA and SMBJ48CA-13.

Q: Are there any compliance or certification differences?

A: Both parts carry identical RoHS non-compliant status, REACH unaffected classification, and EAR99 ECCN designation. The MSMBJ48CA holds MIL-PRF-19500 military qualification, which is not specified for the SMBJ48CA-13. For military or aerospace applications requiring MIL-PRF-19500 qualification, the MSMBJ48CA is the appropriate selection.