MASMBJ64CA Equivalent & Substitute Parts

Part Overview

The MASMBJ64CA 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 currently active in production and maintains military-grade qualification under MIL-PRF-19500. Substitute parts are necessary when the primary manufacturer part becomes unavailable, when alternative suppliers offer improved lead times, or when design requirements permit equivalent electrical and mechanical specifications from qualified alternative manufacturers.

Substiute Parts

MASMBJ64CA

Microchip TechnologyIn Stock: 1144MASMBJ64CA Datasheet

Current PartRFQ

SMBJ64CA-13

Diodes IncorporatedIn Stock: 4422SMBJ64CA-13 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MASMBJ64CA is permissible when an alternative part maintains electrical equivalence across all critical parameters that define TVS diode functionality. The primary substitution criteria are:

Electrical Parameters (Must Match):

• Voltage - Reverse Standoff: 64V (typical)
• Voltage - Breakdown (Min): 71.1V
• Voltage - Clamping (Max) @ Ipp: 103V
• Current - Peak Pulse (10/1000µs): 5.8A
• Power - Peak Pulse: 600W
• Type: Zener
• Bidirectional Channels: 1

Mechanical Parameters (Must Match):

• Package / Case: DO-214AA or SMB
• Mounting Type: Surface Mount

Environmental Parameters (Must Match or Exceed):

• Operating Temperature Range: -65°C to 150°C minimum

The SMBJ64CA-13 from Diodes Incorporated satisfies all electrical and mechanical equivalence criteria. The operating temperature range of -55°C to 150°C represents a narrower specification than the main part; however, this remains within acceptable substitution parameters for applications not requiring the full -65°C lower limit.

Parameter Comparison

Engineering Selection Recommendations

Primary Part (MASMBJ64CA): The MASMBJ64CA remains the preferred selection for applications requiring the full military-grade specification under MIL-PRF-19500 and the extended operating temperature range of -65°C to 150°C. This part is currently active in production with substantial inventory availability (1118 pcs). Selection of the primary part is recommended when design specifications explicitly require military qualification or when the lower temperature limit of -65°C is a functional requirement.

Substitute Part (SMBJ64CA-13): The SMBJ64CA-13 from Diodes Incorporated provides electrical and mechanical equivalence for applications where the operating temperature range of -55°C to 150°C is acceptable. This substitute is appropriate for commercial and industrial applications that do not mandate military-grade qualification. The substitute part is currently discontinued at DiGi Electronics; however, inventory availability is reported at 4400 pcs through alternative distribution channels. The SMBJ64CA-13 maintains identical electrical performance, package compatibility, and environmental compliance (RoHS non-compliant, REACH Unaffected) as the primary part.

Compliance Considerations: Both the primary and substitute parts are RoHS non-compliant and REACH Unaffected. Selection between these parts should account for end-application regulatory requirements and supply chain constraints rather than compliance differences.

Frequently Asked Questions (FAQ)

Q: Can the SMBJ64CA-13 be used as a direct replacement for the MASMBJ64CA in all applications?

A: The SMBJ64CA-13 provides direct electrical and mechanical substitution for applications where the operating temperature range of -55°C to 150°C satisfies design requirements. Applications requiring operation below -55°C or those with explicit military-grade qualification mandates must use the MASMBJ64CA.

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

A: DO-214AA and SMB refer to the same surface-mount package form factor. Both the primary part and substitute part use this identical package, ensuring mechanical compatibility on printed circuit boards without requiring layout modifications.

Q: Are there differences in electrical performance between the MASMBJ64CA and SMBJ64CA-13?

A: No. Both parts maintain identical electrical specifications: 64V reverse standoff voltage, 71.1V minimum breakdown voltage, 103V maximum clamping voltage, 5.8A peak pulse current, and 600W peak pulse power rating.

Q: What does "Bidirectional Channels: 1" mean for TVS diode selection?

A: This indicates the TVS diode provides protection in both forward and reverse bias directions through a single diode element. Both the primary and substitute parts offer identical bidirectional protection capability.

Q: Why is the SMBJ64CA-13 listed as discontinued at DiGi Electronics if it is a suitable substitute?

A: Distributor availability varies by channel and time. Discontinuation at one distributor does not indicate unavailability through alternative suppliers. The substitute part remains available through other distribution networks with reported inventory of 4400 pcs.

Q: How do the RoHS and REACH compliance statuses affect part selection?

A: Both the primary and substitute parts share identical compliance status: RoHS non-compliant and REACH Unaffected. Compliance considerations do not differentiate between these parts. Applications with RoHS or REACH requirements must evaluate alternative part families rather than selecting between these two options.

Q: What is the practical difference between the -65°C and -55°C lower operating temperature limits?

A: The MASMBJ64CA operates reliably to -65°C, while the SMBJ64CA-13 operates reliably to -55°C. Applications requiring operation in environments below -55°C must use the MASMBJ64CA. Most commercial and industrial applications operate above -55°C and can use either part.