MASMBJ64CAE3 Equivalent & Substitute Parts

Part Overview

The MASMBJ64CAE3 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 64V and provides clamping at 103V maximum, with a peak pulse current rating of 5.8A. The component is qualified to MIL-PRF-19500 military standards and is currently active in production with 1102 units in stock.

Substitute parts are necessary when the primary manufacturer part becomes unavailable, when supply chain constraints require alternative sourcing, or when design flexibility permits equivalent components from other manufacturers that meet identical electrical and mechanical specifications.

Substiute Parts

MASMBJ64CAE3

Microchip TechnologyIn Stock: 1135MASMBJ64CAE3 Datasheet

Current PartRFQ

SMBJ64CA-13

Diodes IncorporatedIn Stock: 4422SMBJ64CA-13 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of TVS diodes is determined by strict equivalence across the following electrical and mechanical parameters:

Critical Matching Parameters:

• Voltage - Reverse Standoff (Typ): 64V
• Voltage - Breakdown (Min): 71.1V
• Voltage - Clamping (Max) @ Ipp: 103V
• Current - Peak Pulse (10/1000µs): 5.8A
• Power - Peak Pulse: 600W
• Package / Case: DO-214AA or SMB
• Mounting Type: Surface Mount
• Bidirectional Channels: 1
• Type: Zener

The substitute part SMBJ64CA-13 from Diodes Incorporated meets all critical electrical parameters identically. Both components share the same base product number (SMBJ64), operate within compatible temperature ranges, and are housed in equivalent surface-mount packages. The substitute maintains the same voltage ratings, current handling capacity, and power dissipation specifications required for direct functional replacement.

Parameter Comparison

*The SMBJ64CA-13 operates from -55°C minimum, which is 10°C higher than the MASMBJ64CAE3 minimum of -65°C. For applications requiring operation below -55°C, the MASMBJ64CAE3 is required.

Engineering Selection Recommendations

Primary Part: MASMBJ64CAE3 (Microchip Technology)

The MASMBJ64CAE3 is the recommended selection for applications requiring military-grade qualification. This component holds active product status and carries MIL-PRF-19500 certification, making it suitable for defense, aerospace, and high-reliability industrial applications. Current inventory of 1102 units supports immediate procurement.

Substitute Part: SMBJ64CA-13 (Diodes Incorporated)

The SMBJ64CA-13 provides electrical and mechanical equivalence for general-purpose applications where military qualification is not required. This substitute matches all critical voltage, current, and power specifications. However, this part is discontinued at DiGi Electronics, which may impact long-term availability. The operating temperature minimum of -55°C (versus -65°C for the primary part) represents a functional limitation for applications requiring extended low-temperature operation.

Selection Criteria:

• Use MASMBJ64CAE3 for military-qualified designs, applications below -55°C, or when MIL-PRF-19500 compliance is mandatory.
• Use SMBJ64CA-13 only when the primary part is unavailable and military qualification is not required, with verification that the -55°C minimum temperature limit is acceptable for the application.

Frequently Asked Questions (FAQ)

Q: Can SMBJ64CA-13 be used as a direct replacement for MASMBJ64CAE3 in all applications?

A: The SMBJ64CA-13 provides direct electrical replacement for voltage clamping, current handling, and power dissipation. However, two factors require evaluation: (1) The substitute lacks MIL-PRF-19500 military qualification, making it unsuitable for defense and aerospace applications; (2) The operating temperature minimum is -55°C instead of -65°C, which excludes use in applications requiring operation below -55°C.

Q: Are the package dimensions identical between MASMBJ64CAE3 and SMBJ64CA-13?

A: Both components use the DO-214AA (SMB) surface-mount package, which ensures mechanical and thermal compatibility on printed circuit boards. PCB footprints and reflow soldering profiles are identical.

Q: What is the significance of the base product number SMBJ64?

A: The base product number SMBJ64 indicates the 64V reverse standoff voltage rating and SMB package type. Both the primary part and substitute share this designation, confirming they belong to the same electrical class and package family.

Q: Why is the SMBJ64CA-13 listed as discontinued at DiGi Electronics?

A: Product discontinuation at a specific distributor does not indicate global unavailability. The SMBJ64CA-13 may remain available through other authorized distributors or direct manufacturer channels. However, discontinuation status suggests reduced market demand and potential future supply constraints.

Q: Are there compliance differences between the primary and substitute parts?

A: Both components share identical RoHS non-compliance status, REACH unaffected status, and MSL 1 (unlimited) moisture sensitivity rating. The primary difference is military qualification: MASMBJ64CAE3 holds MIL-PRF-19500 certification while SMBJ64CA-13 does not.

Q: What is the impact of the 10°C difference in minimum operating temperature?

A: The MASMBJ64CAE3 operates from -65°C while SMBJ64CA-13 operates from -55°C. For applications with ambient or junction temperatures below -55°C, only the MASMBJ64CAE3 is suitable. For applications with minimum operating temperatures at or above -55°C, both parts are functionally equivalent.