MASMBJ58CA Equivalent & Substitute Parts

Part Overview

The MASMBJ58CA 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 58V and provides clamping at 93.6V maximum, with a peak pulse current rating of 6.4A. The component is housed in a DO-214AA (SMB) package and is qualified to MIL-PRF-19500 military standards. Identification of equivalent and substitute parts is necessary to address inventory availability, supply chain continuity, and manufacturing flexibility while maintaining electrical and mechanical compatibility.

Substiute Parts

MASMBJ58CA

Microchip TechnologyIn Stock: 810MASMBJ58CA Datasheet

Current PartRFQ

SMBJ58CA-13

Diodes IncorporatedIn Stock: 3768SMBJ58CA-13 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MASMBJ58CA is determined by strict equivalence across the following critical electrical and mechanical parameters:

Electrical Equivalence Criteria:

• Voltage - Reverse Standoff (Typ): 58V
• Voltage - Breakdown (Min): 64.4V
• Voltage - Clamping (Max) @ Ipp: 93.6V
• Current - Peak Pulse (10/1000µs): 6.4A
• Power - Peak Pulse: 600W
• Bidirectional Channels: 1
• Type: Zener

Mechanical Equivalence Criteria:

• Package / Case: DO-214AA, SMB
• Mounting Type: Surface Mount
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

Acceptable Variation:

• Operating Temperature Range: Substitute parts must support the minimum operating temperature of the main part or lower. The main part operates from -65°C to 150°C; substitute parts operating from -55°C to 150°C are acceptable for applications not requiring the full -65°C lower limit.

The SMBJ58CA-13 from Diodes Incorporated meets all electrical equivalence criteria and mechanical compatibility requirements. The operating temperature range difference (-55°C minimum versus -65°C minimum) represents a narrower specification that is acceptable for general-purpose applications operating within standard industrial temperature ranges.

Parameter Comparison

*Operating temperature range acceptable for applications not requiring operation below -55°C.

Engineering Selection Recommendations

MASMBJ58CA (Microchip Technology):

• Primary selection for applications requiring full military-grade qualification per MIL-PRF-19500
• Required for systems operating at temperatures below -55°C
• Active product status ensures long-term availability and supply continuity
• Current inventory: 767 pieces

SMBJ58CA-13 (Diodes Incorporated):

• Electrically and mechanically equivalent for general-purpose transient voltage suppression
• Suitable for applications operating within -55°C to 150°C temperature range
• Product status: Discontinued at DiGi Electronics; verify availability through alternative distribution channels before design implementation
• Higher current inventory availability: 3700 pieces
• Identical electrical performance and package compatibility with MASMBJ58CA

Selection between these parts should be based on application temperature requirements, supply chain strategy, and military qualification necessity. Both components provide equivalent transient voltage suppression performance within their respective operating temperature specifications.

Frequently Asked Questions (FAQ)

Q: Can SMBJ58CA-13 be used as a direct replacement for MASMBJ58CA in all applications?

A: The SMBJ58CA-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 MASMBJ58CA. Both components are electrically identical across all voltage and current parameters.

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

A: DO-214AA and SMB are equivalent designations for the same surface-mount package. Both the MASMBJ58CA and SMBJ58CA-13 use this package, ensuring identical PCB footprint, land pattern, and reflow soldering compatibility.

Q: Does the operating temperature range difference affect circuit performance?

A: The operating temperature range specifies the limits within which the component maintains its electrical specifications. For applications operating within -55°C to 150°C, the SMBJ58CA-13 maintains full performance equivalence. Applications requiring operation below -55°C must use the MASMBJ58CA.

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

A: The MASMBJ58CA carries MIL-PRF-19500 military qualification; the SMBJ58CA-13 does not list this qualification. Both components are RoHS non-compliant and REACH Unaffected. Military applications or systems requiring MIL-PRF-19500 certification must use the MASMBJ58CA.

Q: What does "Discontinued at DiGi Electronics" mean for the SMBJ58CA-13?

A: This indicates the part is no longer actively stocked by DiGi Electronics distribution. Availability through other authorized distributors should be verified before committing to this substitute in production designs.

Q: Are the electrical specifications identical between these two TVS diodes?

A: Yes. Both components provide identical reverse standoff voltage (58V), breakdown voltage (64.4V minimum), clamping voltage (93.6V maximum), peak pulse current (6.4A), and peak pulse power (600W). They are electrically interchangeable within their respective operating temperature ranges.