MSMBJ64CA Equivalent & Substitute Parts

Part Overview

The MSMBJ64CA 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 operates with a reverse standoff voltage of 64V and provides clamping at 103V maximum, with a peak pulse current rating of 5.8A. The component is currently active in production and available in bulk packaging with 740 pieces in stock. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and continuity of supply for applications requiring identical electrical and mechanical performance characteristics.

Substiute Parts

MSMBJ64CA

Microchip TechnologyIn Stock: 806MSMBJ64CA Datasheet

Current PartRFQ

SMBJ64CA-13

Diodes IncorporatedIn Stock: 4422SMBJ64CA-13 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MSMBJ64CA are qualified based on strict equivalence of electrical and mechanical parameters. The substitution criteria are:

Primary Equivalence Parameters:

• Voltage - Reverse Standoff (Typ): 64V
• Voltage - Clamping (Max) @ Ipp: 103V
• Current - Peak Pulse (10/1000µs): 5.8A
• Power - Peak Pulse: 600W
• Package / Case: DO-214AA or SMB
• Mounting Type: Surface Mount
• Type: Zener
• Bidirectional Channels: 1

The substitute part SMBJ64CA-13 from Diodes Incorporated meets all primary equivalence parameters. This part maintains identical voltage ratings, current handling, and power dissipation specifications. The operating temperature range differs slightly (-55°C to 150°C versus -65°C to 150°C for the main part), representing a narrower lower temperature limit. Both parts are classified as non-RoHS compliant and share identical REACH and ECCN designations.

Parameter Comparison

Engineering Selection Recommendations

MSMBJ64CA (Microchip Technology) - Primary Selection

The MSMBJ64CA is the primary component choice. It is currently active in production with established supply availability (740 pieces in stock). This part carries Military grade qualification under MIL-PRF-19500, providing enhanced reliability assurance for applications requiring military-specification compliance. The operating temperature range extends to -65°C, supporting applications in extreme low-temperature environments.

SMBJ64CA-13 (Diodes Incorporated) - Substitute Selection

The SMBJ64CA-13 qualifies as a direct electrical and mechanical substitute. All critical voltage, current, and power parameters are identical to the MSMBJ64CA. The part is manufactured in the same SMB package (DO-214AA) and maintains surface-mount compatibility. However, this part is listed as discontinued at DiGi Electronics, indicating reduced long-term availability. The operating temperature minimum of -55°C is suitable for standard industrial and commercial applications but does not extend to the -65°C lower limit of the primary part. Selection of this substitute should be limited to applications where the -55°C to 150°C temperature range is acceptable and where military-grade qualification is not required.

Compliance Considerations

Both parts share identical RoHS non-compliance status, REACH unaffected designation, and EAR99 export classification. No compliance advantage exists between the two options. Component selection should be based on supply availability, temperature range requirements, and military qualification necessity.

Frequently Asked Questions (FAQ)

Q: Can SMBJ64CA-13 be used as a direct replacement for MSMBJ64CA in all applications?

A: The SMBJ64CA-13 provides electrical and mechanical equivalence for applications operating within the -55°C to 150°C temperature range. Applications requiring operation below -55°C must use the MSMBJ64CA. Applications requiring military-grade qualification (MIL-PRF-19500) must use the MSMBJ64CA.

Q: What are the key electrical parameters that define substitution eligibility?

A: Substitution eligibility is determined by matching: Voltage - Reverse Standoff (64V), Voltage - Clamping (103V), Current - Peak Pulse (5.8A), and Power - Peak Pulse (600W). All substitute parts must maintain these exact specifications.

Q: Are there package compatibility differences between MSMBJ64CA and SMBJ64CA-13?

A: Both parts use the DO-214AA package, commonly designated as SMB. Package footprints and land patterns are identical, ensuring direct PCB compatibility without layout modifications.

Q: Why is SMBJ64CA-13 listed as discontinued?

A: Discontinuation status is specific to DiGi Electronics's inventory and does not reflect manufacturer production status. Availability through alternative distributors should be evaluated independently.

Q: What is the significance of the Military grade designation on MSMBJ64CA?

A: Military grade classification indicates qualification to MIL-PRF-19500 standards, providing enhanced reliability, screening, and quality assurance requirements. This designation is relevant only for applications with military specification requirements.

Q: Are there any RoHS or environmental compliance differences between these parts?

A: Both parts carry identical RoHS non-compliant and REACH unaffected designations. No environmental compliance advantage exists between the two options.