MASMBJ75CA Equivalent & Substitute Parts

Part Overview

The MASMBJ75CA 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 75V and provides clamping at 121V maximum, with a peak pulse current rating of 4.9A. The component is currently active in production and available in bulk packaging with 1097 pieces in stock.

Substitute parts are necessary when the primary manufacturer part becomes unavailable, when alternative sourcing is required for supply chain optimization, or when design flexibility permits selection from qualified equivalent devices that meet identical electrical and mechanical specifications.

Substiute Parts

MASMBJ75CA

Microchip TechnologyIn Stock: 1182MASMBJ75CA Datasheet

Current PartRFQ

SMBJ75CA-13

Diodes IncorporatedIn Stock: 6838SMBJ75CA-13 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MASMBJ75CA is determined by strict equivalence across the following critical parameters:

Electrical Equivalence Requirements:

• Voltage - Reverse Standoff (Typ): 75V
• Voltage - Breakdown (Min): 83.3V
• Voltage - Clamping (Max) @ Ipp: 121V
• Current - Peak Pulse (10/1000µs): 4.9A
• Power - Peak Pulse: 600W
• Type: Zener
• Bidirectional Channels: 1

Mechanical Equivalence Requirements:

• Package / Case: DO-214AA, SMB
• Mounting Type: Surface Mount

Environmental & Compliance Equivalence:

• RoHS Status: RoHS non-compliant
• Moisture Sensitivity Level (MSL): 1 (Unlimited)
• REACH Status: REACH Unaffected

The substitute part SMBJ75CA-13 from Diodes Incorporated meets all electrical and mechanical requirements. 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 specification that does not affect substitution validity for applications within the -55°C to 150°C envelope.

Parameter Comparison

Engineering Selection Recommendations

Primary Part Status: The MASMBJ75CA from Microchip Technology is currently active in production with 1097 pieces available in stock. This part carries MIL-PRF-19500 military qualification and is suitable for applications requiring military-grade components.

Substitute Part Status: The SMBJ75CA-13 from Diodes Incorporated is listed as discontinued at DiGi Electronics. While electrically and mechanically equivalent, this part's discontinued status may affect long-term availability and supply chain reliability.

Compliance Considerations: Both the main part and substitute are RoHS non-compliant and REACH unaffected. Selection between these parts should account for end-application regulatory requirements and customer specifications regarding RoHS compliance.

Temperature Range Consideration: The MASMBJ75CA supports operation from -65°C to 150°C, while the SMBJ75CA-13 operates from -55°C to 150°C. Applications requiring operation below -55°C must use the MASMBJ75CA or identify alternative sources for the SMBJ75CA-13 variant with extended low-temperature rating.

Qualification & Certification: The MASMBJ75CA holds MIL-PRF-19500 military qualification. Applications requiring military-grade certification should prioritize the MASMBJ75CA unless the substitute part carries equivalent military qualification documentation.

Frequently Asked Questions (FAQ)

Q: Can SMBJ75CA-13 be used as a direct replacement for MASMBJ75CA in all applications?

A: The SMBJ75CA-13 is electrically and mechanically equivalent for applications operating within the -55°C to 150°C temperature range. Applications requiring operation below -55°C or military qualification must use the MASMBJ75CA.

Q: What is the significance of the DO-214AA and SMB package designation?

A: DO-214AA and SMB refer to the same surface-mount package form factor. Both the MASMBJ75CA and SMBJ75CA-13 use this identical package, ensuring mechanical compatibility on printed circuit boards without layout modifications.

Q: Why is the SMBJ75CA-13 listed as discontinued?

A: Discontinuation at DiGi Electronics indicates that this distributor no longer stocks the part. However, the part may remain available through other authorized distributors or direct from Diodes Incorporated. Verify current availability through your supply chain before committing to this substitute.

Q: Are there differences in electrical performance between the MASMBJ75CA and SMBJ75CA-13?

A: No. Both parts share identical electrical specifications: 75V reverse standoff voltage, 83.3V minimum breakdown voltage, 121V maximum clamping voltage, 4.9A peak pulse current, and 600W peak pulse power rating.

Q: What does RoHS non-compliant status mean for component selection?

A: RoHS non-compliant indicates the part contains restricted substances (such as lead) not permitted in certain regulated markets. Applications destined for RoHS-regulated regions (EU, California, etc.) require RoHS-compliant alternatives or exemption documentation.

Q: How does MSL 1 (Unlimited) affect handling and storage?

A: MSL 1 (Unlimited) indicates the component has unlimited shelf life and requires no special moisture-control handling during storage or assembly. Standard component storage conditions are sufficient.

Q: What is the base product number SMBJ75, and how does it relate to the full part numbers?

A: SMBJ75 is the base product designation indicating a 75V TVS diode in the SMB package family. Full part numbers such as MASMBJ75CA and SMBJ75CA-13 include manufacturer-specific suffixes (CA, -13) that may denote voltage tolerance, date code, or manufacturing variant while maintaining the same core electrical specifications.