MXLSMBJ48CA Equivalent & Substitute Parts

Part Overview

The MXLSMBJ48CA 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 48V reverse standoff voltage and provides clamping at 77.4V maximum, with a peak pulse current rating of 7.7A. The component is housed in a DO-214AA (SMB) package and is currently active in production. Equivalent and substitute parts are identified to support procurement flexibility, accommodate supply chain variations, and provide alternatives when the primary part becomes unavailable.

Substiute Parts

MXLSMBJ48CA

Microchip TechnologyIn Stock: 850MXLSMBJ48CA Datasheet

Current PartRFQ

SMBJ48CA-13

Diodes IncorporatedIn Stock: 944SMBJ48CA-13 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MXLSMBJ48CA is determined by electrical and mechanical parameter equivalence. The critical parameters that define substitutability are:

• Voltage Rating: Reverse standoff voltage of 48V, breakdown minimum of 53.3V, and clamping maximum of 77.4V
• Current Handling: Peak pulse current of 7.7A at 10/1000µs pulse width
• Power Dissipation: Peak pulse power of 600W
• Package Compatibility: DO-214AA (SMB) surface-mount package
• Diode Type: Bidirectional Zener configuration with single channel

The substitute part SMBJ48CA-13 from Diodes Incorporated meets all electrical specifications and package requirements. Substitution is valid when all parameters listed above are identical or equivalent between the main part and the substitute part.

Parameter Comparison

*The SMBJ48CA-13 has a minimum operating temperature of -55°C, which is 10°C higher than the MXLSMBJ48CA minimum of -65°C. This difference is relevant only for applications requiring operation below -55°C.

Engineering Selection Recommendations

MXLSMBJ48CA (Microchip Technology) is the primary specification. This part is currently active in production with 800 units in stock. It carries MIL-PRF-19500 military qualification and operates across the full temperature range of -65°C to 150°C. The part is RoHS non-compliant and carries REACH Unaffected status.

SMBJ48CA-13 (Diodes Incorporated) is a direct electrical equivalent with identical voltage, current, and power specifications. However, this part is discontinued at DiGi Electronics and has a restricted operating temperature minimum of -55°C. Selection of this substitute is appropriate only when the MXLSMBJ48CA is unavailable and the application does not require operation below -55°C. Both parts share identical RoHS and REACH compliance status.

For applications requiring the full military-grade specification and extended low-temperature operation, the MXLSMBJ48CA remains the specified choice. For general-purpose applications within the -55°C to 150°C range, the SMBJ48CA-13 provides functional equivalence.

Frequently Asked Questions (FAQ)

Q: Can SMBJ48CA-13 be used as a direct replacement for MXLSMBJ48CA?

A: The SMBJ48CA-13 is electrically equivalent for all voltage, current, and power parameters. However, it has a higher minimum operating temperature (-55°C versus -65°C). Direct substitution is valid only if the application does not require operation below -55°C.

Q: Are the package dimensions identical between these parts?

A: Both parts use the DO-214AA (SMB) surface-mount package. Package footprints and mounting requirements are identical.

Q: What is the difference in military qualification between these parts?

A: The MXLSMBJ48CA carries MIL-PRF-19500 military qualification. The SMBJ48CA-13 does not list military qualification. Applications requiring military-grade components must use the MXLSMBJ48CA.

Q: Are there RoHS compliance differences?

A: Both parts are RoHS non-compliant and carry identical REACH Unaffected status. No compliance advantage exists between the two parts.

Q: Why is the SMBJ48CA-13 discontinued?

A: The part is discontinued at DiGi Electronics. Availability through other distributors may vary. The MXLSMBJ48CA remains in active production.

Q: What is the significance of the temperature range difference?

A: The 10°C difference in minimum operating temperature (-65°C versus -55°C) is relevant only for applications operating in extreme cold environments. For standard industrial and commercial applications, this difference is not a limiting factor.

Q: Can these parts be used interchangeably in PCB assembly?

A: Yes, both parts use identical DO-214AA (SMB) packages and have identical pin configurations. PCB layouts and assembly processes require no modification.