MASMBJ85CAE3 Equivalent & Substitute Parts

Part Overview

The MASMBJ85CAE3 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 currently active in production and maintains military-grade qualification under MIL-PRF-19500.

Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to inventory constraints, supply chain considerations, or design flexibility needs while maintaining identical functional specifications.

Substiute Parts

MASMBJ85CAE3

Microchip TechnologyIn Stock: 800MASMBJ85CAE3 Datasheet

Current PartRFQ

SMBJ85CA-13

Diodes IncorporatedIn Stock: 4330SMBJ85CA-13 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MASMBJ85CAE3 are qualified based on the following electrical and mechanical parameters:

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, SMB (surface mount)
• Mounting Type: Surface Mount
• Type: Zener
• Bidirectional Channels: 1

Substitute parts must maintain identical electrical performance across all voltage and current ratings, operate within compatible temperature ranges, and utilize the same surface-mount package configuration. The SMBJ85CA-13 from Diodes Incorporated meets these criteria with equivalent specifications across all critical parameters.

Parameter Comparison

*The SMBJ85CA-13 operates across -55°C to 150°C, which covers the upper portion of the MASMBJ85CAE3 range (-65°C to 150°C). Applications requiring operation below -55°C require the primary part.

Engineering Selection Recommendations

Primary Part: MASMBJ85CAE3 (Microchip Technology)

The MASMBJ85CAE3 is the recommended selection for applications requiring military-grade qualification. This part maintains active production status and holds MIL-PRF-19500 certification, making it suitable for defense, aerospace, and high-reliability applications where military qualification is mandatory. Current inventory of 743 units supports immediate procurement.

Substitute Part: SMBJ85CA-13 (Diodes Incorporated)

The SMBJ85CA-13 provides electrical equivalence across all critical parameters and is suitable for general-purpose applications where military qualification is not required. This part is discontinued at DiGi Electronics but maintains 4300 units in inventory through alternative distribution channels. The operating temperature range of -55°C to 150°C is compatible with most commercial and industrial applications. Selection of this substitute is appropriate when supply chain flexibility or cost considerations are primary factors and military certification is not a design requirement.

Both parts are RoHS non-compliant and carry identical REACH and ECCN classifications, ensuring regulatory consistency in substitution scenarios.

Frequently Asked Questions (FAQ)

Q: Can the SMBJ85CA-13 directly replace the MASMBJ85CAE3 in all applications?

A: The SMBJ85CA-13 provides direct electrical substitution for applications operating within the -55°C to 150°C temperature range. Applications requiring operation below -55°C must use the MASMBJ85CAE3. Both parts are electrically identical across voltage, current, and power specifications.

Q: What is the primary difference between these two parts?

A: The MASMBJ85CAE3 includes military-grade qualification (MIL-PRF-19500) and operates across an extended lower temperature range (-65°C vs. -55°C). The SMBJ85CA-13 is a commercial-grade equivalent without military certification. Electrical performance is identical.

Q: Are the packages physically identical?

A: Yes. Both parts use the DO-214AA surface-mount package (SMB designation). PCB footprints and reflow soldering profiles are identical, enabling direct board-level substitution without layout modifications.

Q: Does the SMBJ85CA-13 discontinuation affect its use as a substitute?

A: Discontinuation at DiGi Electronics does not prevent use as a substitute. The part remains available through alternative distributors with 4300 units in current inventory. Discontinuation status reflects distribution channel decisions rather than component reliability or performance.

Q: Are there any compliance differences between these parts?

A: Both parts carry identical RoHS non-compliant status, REACH Unaffected classification, and EAR99 ECCN designation. Regulatory compliance profiles are equivalent. The primary distinction is military qualification, which applies only to the MASMBJ85CAE3.

Q: What moisture sensitivity considerations apply to these parts?

A: Both parts carry MSL 1 (Unlimited) rating, indicating no moisture sensitivity restrictions. Standard handling procedures for surface-mount components apply equally to both parts.