MXLSMBJ7.0A Equivalent & Substitute Parts

Part Overview

The MXLSMBJ7.0A is a unidirectional transient voltage suppressor (TVS) diode manufactured by Microchip Technology, designed for general-purpose overvoltage protection in surface-mount applications. This component features a 7V reverse standoff voltage with a 12V maximum clamping voltage and 50A peak pulse current capability in a DO-214AA (SMB) package. The part maintains active product status with military-grade qualification per MIL-PRF-19500.

Substitute parts are necessary when the primary manufacturer part becomes unavailable, when supply chain constraints limit access to inventory, or when design requirements permit functional equivalents that meet identical electrical and mechanical specifications.

Substiute Parts

MXLSMBJ7.0A

Microchip TechnologyIn Stock: 1067MXLSMBJ7.0A Datasheet

Current PartRFQ

SMBJ7.0A-13

Diodes IncorporatedIn Stock: 903SMBJ7.0A-13 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MXLSMBJ7.0A is determined by strict equivalence across the following critical parameters:

Electrical Equivalence Requirements:

• Voltage - Reverse Standoff (Typ): 7V
• Voltage - Breakdown (Min): 7.78V
• Voltage - Clamping (Max) @ Ipp: 12V
• Current - Peak Pulse (10/1000µs): 50A
• Power - Peak Pulse: 600W
• Type: Zener
• Unidirectional Channels: 1

Mechanical Equivalence Requirements:

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

Compliance Requirements:

• RoHS Status: Non-compliant (matching original specification)
• Moisture Sensitivity Level: 1 (Unlimited)
• REACH Status: REACH Unaffected

The substitute part SMBJ7.0A-13 from Diodes Incorporated satisfies all electrical and mechanical equivalence criteria. Variations in operating temperature range and product status do not preclude functional substitution when the application environment and supply chain requirements are considered.

Parameter Comparison

Engineering Selection Recommendations

Primary Part: MXLSMBJ7.0A (Microchip Technology)

The MXLSMBJ7.0A maintains active product status with military-grade qualification per MIL-PRF-19500, making it the preferred selection for applications requiring long-term supply assurance and compliance documentation. Current inventory of 1010 units supports immediate procurement. This part is suitable for all general-purpose TVS applications within the specified electrical and thermal parameters.

Substitute Part: SMBJ7.0A-13 (Diodes Incorporated)

The SMBJ7.0A-13 provides complete electrical and mechanical equivalence with identical voltage clamping, peak pulse current, and power dissipation characteristics. However, this part is discontinued at DiGi Electronics, limiting future availability. The operating temperature range is narrower (-55°C to 150°C versus -65°C to 150°C), which may restrict use in applications requiring operation below -55°C. Selection of this substitute is appropriate only when the primary part is unavailable and the application environment remains within the specified temperature range.

Both parts share identical RoHS non-compliance status, MSL rating, and REACH unaffected classification, ensuring regulatory consistency in design documentation.

Frequently Asked Questions (FAQ)

Q: Can the SMBJ7.0A-13 be used as a direct replacement for the MXLSMBJ7.0A?

A: The SMBJ7.0A-13 provides complete electrical equivalence across all critical parameters: 7V reverse standoff voltage, 12V clamping voltage, and 50A peak pulse current. Both parts use identical DO-214AA (SMB) surface-mount packaging. Substitution is valid provided the application environment operates within the SMBJ7.0A-13 temperature range of -55°C to 150°C. Applications requiring operation below -55°C must use the MXLSMBJ7.0A.

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

A: DO-214AA is the industry-standard package outline for SMB (Surface Mount Body) TVS diodes. Both the MXLSMBJ7.0A and SMBJ7.0A-13 use this identical package, ensuring mechanical compatibility on printed circuit boards without layout modifications or footprint changes.

Q: Why is the SMBJ7.0A-13 discontinued if it is electrically equivalent?

A: Product discontinuation reflects manufacturer supply chain decisions and market demand rather than technical deficiency. The SMBJ7.0A-13 remains functionally equivalent and suitable for applications where inventory is available. However, the active status of the MXLSMBJ7.0A provides superior long-term supply assurance for new designs and production planning.

Q: Are there compliance differences between these parts?

A: Both parts share identical RoHS non-compliance status, MSL rating of 1 (Unlimited), and REACH unaffected classification. The MXLSMBJ7.0A carries military-grade qualification per MIL-PRF-19500, which may be required for defense or aerospace applications. The SMBJ7.0A-13 does not specify this qualification.

Q: What is the impact of the narrower operating temperature range on the SMBJ7.0A-13?

A: The SMBJ7.0A-13 operates from -55°C to 150°C, compared to -65°C to 150°C for the MXLSMBJ7.0A. This 10°C difference at the lower temperature limit excludes the substitute from applications requiring operation below -55°C. For applications within this narrower range, electrical performance remains identical.

Q: Can these parts be used interchangeably in existing designs?

A: Interchangeability is determined by application requirements. If the design operates within -55°C to 150°C and does not require military qualification, the SMBJ7.0A-13 provides complete functional equivalence. If the design requires operation below -55°C or military-grade certification, the MXLSMBJ7.0A is mandatory.