MASMBJ75CAE3 Equivalent & Substitute Parts

Part Overview

The MASMBJ75CAE3 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 75V reverse standoff voltage and provides 121V maximum clamping voltage at peak pulse current. The component is qualified to MIL-PRF-19500 military standards and is currently active in production with 895 units in stock.

Equivalent and substitute parts are necessary when the primary component becomes unavailable, when supply chain constraints require alternative sourcing, or when design flexibility permits selection from multiple qualified manufacturers offering identical electrical and mechanical specifications.

Substiute Parts

MASMBJ75CAE3

Microchip TechnologyIn Stock: 998MASMBJ75CAE3 Datasheet

Current PartRFQ

SMBJ75CA-13

Diodes IncorporatedIn Stock: 6838SMBJ75CA-13 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MASMBJ75CAE3 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:

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

The substitute part SMBJ75CA-13 manufactured by Diodes Incorporated meets all electrical specifications and mechanical requirements. This part shares the identical base product number (SMBJ75) and operates within the same voltage and current parameters. The operating temperature range of the substitute (-55°C to 150°C) encompasses the critical upper limit of the primary part, ensuring thermal compatibility in most applications.

Parameter Comparison

*The substitute part operates across a narrower low-temperature range (-55°C minimum versus -65°C minimum). Applications requiring operation below -55°C require verification against specific design requirements.

Engineering Selection Recommendations

Primary Part: MASMBJ75CAE3

The MASMBJ75CAE3 is the specified component with active production status and military qualification (MIL-PRF-19500). This part is recommended for applications requiring military-grade certification and extended low-temperature operation to -65°C. Current inventory of 895 units supports immediate procurement.

Substitute Part: SMBJ75CA-13

The SMBJ75CA-13 from Diodes Incorporated provides electrical and mechanical equivalence with identical voltage and current ratings. This part is currently discontinued at DiGi Electronics but maintains 6,800 units in available inventory. The substitute is suitable for applications where military qualification is not required and operating temperature does not fall below -55°C.

Both parts share RoHS non-compliant status and REACH unaffected classification. Both carry ECCN EAR99 and HTSUS 8541.10.0080 designations. Moisture sensitivity level is 1 (Unlimited) for both components.

Frequently Asked Questions (FAQ)

Q: Can SMBJ75CA-13 directly replace MASMBJ75CAE3 in all applications?

A: Direct replacement is valid for applications operating within the temperature range of -55°C to 150°C. Applications requiring operation below -55°C require the primary part (MASMBJ75CAE3) or confirmation that the lower temperature limit does not apply to the specific design.

Q: Are the package dimensions identical between these parts?

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

Q: What is the significance of the military qualification on MASMBJ75CAE3?

A: The MIL-PRF-19500 qualification indicates the primary part meets military procurement standards for reliability and quality assurance. This qualification is not present on the substitute part. Applications subject to military specifications or defense procurement requirements must use the qualified part.

Q: Do both parts have the same RoHS compliance status?

A: Both parts are RoHS non-compliant. If RoHS compliance is required for the application, neither part is suitable without verification of alternative compliant options.

Q: What is the difference in peak pulse current rating between these parts?

A: Both parts are rated identically at 4.9A peak pulse current (10/1000µs). No derating or current limitation differences exist between the primary and substitute parts.

Q: Can the substitute part be used in high-reliability applications?

A: The substitute part (SMBJ75CA-13) is discontinued at DiGi Electronics, which may limit long-term availability for high-reliability or long-lifecycle applications. The primary part (MASMBJ75CAE3) with active production status is recommended for applications requiring sustained component availability.