MASMBJ85CA Equivalent & Substitute Parts

Part Overview

The MASMBJ85CA 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 an 85V reverse standoff voltage and provides 137V maximum clamping voltage at peak pulse current. The component is housed in a DO-214AA (SMB) package and is qualified to MIL-PRF-19500 military standards.

The MASMBJ85CA maintains active product status with 1008 units currently in stock. Identifying equivalent and substitute parts is necessary to ensure design flexibility, manage supply chain continuity, and accommodate alternative sourcing requirements while maintaining electrical and mechanical compatibility.

Substiute Parts

MASMBJ85CA

Microchip TechnologyIn Stock: 1020MASMBJ85CA Datasheet

Current PartRFQ

SMBJ85CA-13

Diodes IncorporatedIn Stock: 4330SMBJ85CA-13 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MASMBJ85CA are identified based on strict electrical and mechanical parameter matching. The following criteria determine substitution eligibility:

Critical Matching Parameters:

• Voltage - Reverse Standoff (Typ): 85V
• Voltage - Breakdown (Min): 94.4V
• Voltage - Clamping (Max) @ Ipp: 137V
• Current - Peak Pulse (10/1000µs): 4.4A
• Power - Peak Pulse: 600W
• Package / Case: DO-214AA or SMB
• Mounting Type: Surface Mount
• Type: Zener
• Bidirectional Channels: 1

The SMBJ85CA-13 from Diodes Incorporated satisfies all critical electrical parameters and maintains identical package specifications. Both components share the same base product number (SMBJ85) and are classified as general-purpose TVS diodes with equivalent transient suppression characteristics.

Parameter Comparison

Engineering Selection Recommendations

MASMBJ85CA (Microchip Technology) - Primary Selection

The MASMBJ85CA is the primary component specification. It maintains active product status and carries MIL-PRF-19500 military qualification, making it suitable for applications requiring military-grade transient voltage suppression. The extended operating temperature range of -65°C to 150°C provides broader thermal coverage. Current inventory of 1008 units supports immediate availability.

SMBJ85CA-13 (Diodes Incorporated) - Substitute Selection

The SMBJ85CA-13 provides electrical equivalence across all critical transient suppression parameters. However, this part is listed as discontinued at DiGi Electronics, which may impact long-term sourcing reliability. The operating temperature range is narrower at the lower limit (-55°C versus -65°C), which may be a constraint for applications requiring extended cold-temperature operation. The part does not carry explicit military qualification documentation in the provided specifications. Inventory availability is higher at 4300 units, though discontinuation status should be verified with current distributors.

Selection between these parts should be based on application temperature requirements, military qualification necessity, and supply chain continuity objectives.

Frequently Asked Questions (FAQ)

Q: Can the SMBJ85CA-13 be used as a direct replacement for the MASMBJ85CA in all applications?

A: The SMBJ85CA-13 provides electrical equivalence for transient voltage suppression across all specified peak pulse parameters. However, applications requiring operation below -55°C or military-grade qualification must retain the MASMBJ85CA. Verify application temperature specifications before substitution.

Q: Are the package dimensions identical between these two parts?

A: Both parts use the DO-214AA (SMB) surface-mount package. Physical dimensions and PCB footprints are identical, allowing direct board-level substitution without layout modifications.

Q: What is the significance of the MASMBJ85CA's MIL-PRF-19500 qualification?

A: MIL-PRF-19500 qualification indicates the component meets military performance and reliability standards. This certification is relevant for defense, aerospace, and other applications requiring military-grade component specifications. The SMBJ85CA-13 does not carry this qualification in the provided documentation.

Q: Why does the SMBJ85CA-13 show a narrower operating temperature range?

A: The SMBJ85CA-13 specifies -55°C to 150°C, compared to the MASMBJ85CA's -65°C to 150°C. This represents a 10°C difference at the lower temperature limit. Applications operating in environments below -55°C require the MASMBJ85CA to ensure specified performance.

Q: What does "discontinued at DiGi Electronics" mean for the SMBJ85CA-13?

A: Discontinuation at a specific distributor indicates that part may no longer be available through that channel. Current availability through other distributors should be confirmed independently. The 4300-unit inventory figure reflects stock at the time of data collection and does not guarantee future availability.

Q: Are there any compliance differences between these parts?

A: Both parts share identical RoHS non-compliance status, REACH unaffected status, and MSL 1 (unlimited) moisture sensitivity ratings. Compliance profiles are equivalent for regulatory purposes.

Q: Can these parts be used interchangeably in PCB assembly?

A: Yes, from a physical and electrical standpoint. Both components use identical DO-214AA (SMB) packages and surface-mount technology. Assembly processes, solder profiles, and handling procedures are interchangeable. Application-specific requirements regarding temperature range and military qualification must be evaluated independently.