MXLSMBJ75CA Equivalent & Substitute Parts

Part Overview

The MXLSMBJ75CA 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 housed in a DO-214AA (SMB) package and is qualified to MIL-PRF-19500 military standards.

The MXLSMBJ75CA maintains active product status with 1097 units in current inventory. Identification of equivalent and substitute parts is necessary to support supply chain continuity, accommodate design flexibility, and provide alternative sourcing options when the primary component becomes unavailable or when design requirements necessitate functionally equivalent alternatives.

Substiute Parts

MXLSMBJ75CA

Microchip TechnologyIn Stock: 1113MXLSMBJ75CA Datasheet

Current PartRFQ

SMBJ75CA-13

Diodes IncorporatedIn Stock: 6838SMBJ75CA-13 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MXLSMBJ75CA is determined by electrical and mechanical parameter equivalence within the TVS diode category. The critical parameters that define substitutability are:

Electrical Parameters:

• 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 (1 channel)

Mechanical Parameters:

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

Environmental & Compliance Parameters:

• Operating Temperature Range: -65°C to 150°C (TJ)
• RoHS Status: RoHS non-compliant
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

The substitute part SMBJ75CA-13 (Diodes Incorporated) meets all electrical and mechanical requirements. This part shares the identical SMBJ75 base product number, confirming functional equivalence. The operating temperature range of the substitute (-55°C to 150°C) encompasses the critical upper limit but has a narrower lower bound; this difference does not preclude substitution in applications where the -65°C minimum is not required.

Parameter Comparison

*Operating temperature lower bound differs: MXLSMBJ75CA supports -65°C; SMBJ75CA-13 supports -55°C minimum.

Engineering Selection Recommendations

Primary Part: MXLSMBJ75CA (Microchip Technology)

The MXLSMBJ75CA is the specified component with active product status and military-grade qualification (MIL-PRF-19500). This part is recommended for applications requiring military-grade certification and extended low-temperature operation to -65°C.

Substitute Part: SMBJ75CA-13 (Diodes Incorporated)

The SMBJ75CA-13 is electrically and mechanically equivalent to the MXLSMBJ75CA across all critical parameters. This substitute is suitable for applications where the operating temperature range of -55°C to 150°C is acceptable. The SMBJ75CA-13 is currently discontinued at DiGi Electronics; however, 6800 units remain in inventory through alternative distribution channels.

Selection Criteria:

• Use MXLSMBJ75CA when military qualification (MIL-PRF-19500) is a design requirement or when operation below -55°C is necessary.
• Use SMBJ75CA-13 when supply constraints on the primary part exist and the narrower operating temperature range is compatible with application requirements.
• Both parts are RoHS non-compliant and share identical MSL ratings, making them interchangeable from a handling and storage perspective.

Frequently Asked Questions (FAQ)

Q: Can SMBJ75CA-13 be used as a direct replacement for MXLSMBJ75CA in all applications?

A: The SMBJ75CA-13 is electrically and mechanically equivalent for applications operating within the -55°C to 150°C temperature range. If your application requires operation below -55°C, the MXLSMBJ75CA is required. Both parts share identical electrical specifications (75V standoff, 121V clamp, 4.9A peak pulse current, 600W peak power) and package format (DO-214AA, SMB).

Q: What is the significance of the MIL-PRF-19500 qualification on the MXLSMBJ75CA?

A: MIL-PRF-19500 is a military performance specification for semiconductor devices. This qualification indicates the MXLSMBJ75CA meets stringent military-grade testing and reliability standards. If your design requires military qualification, the MXLSMBJ75CA must be used; the SMBJ75CA-13 does not carry this certification.

Q: Are there any package or pinout differences between these parts?

A: No. Both the MXLSMBJ75CA and SMBJ75CA-13 use the DO-214AA (SMB) surface-mount package with identical pinout and footprint. They are mechanically interchangeable on the PCB.

Q: Why does SMBJ75CA-13 have a narrower operating temperature range?

A: The SMBJ75CA-13 specifies a minimum operating temperature of -55°C versus -65°C for the MXLSMBJ75CA. This reflects the manufacturer's tested and validated operating envelope. For applications requiring the full -65°C to 150°C range, the MXLSMBJ75CA is the appropriate choice.

Q: What does "RoHS non-compliant" mean for both parts?

A: Both parts do not conform to the Restriction of Hazardous Substances (RoHS) directive. They may contain lead or other restricted substances. Verify RoHS compliance requirements for your application and end-market before selection.

Q: Are the electrical characteristics identical between these parts?

A: Yes. Both parts share identical electrical specifications: 75V reverse standoff voltage, 83.3V minimum breakdown voltage, 121V maximum clamping voltage at peak pulse current, 4.9A peak pulse current (10/1000µs), and 600W peak pulse power. They are functionally equivalent for overvoltage protection circuits.

Q: What is the MSL rating, and why is it the same for both parts?

A: Moisture Sensitivity Level (MSL) 1 (Unlimited) indicates these components have no moisture sensitivity and require no special moisture control during storage or handling. Both parts can be stored and handled under standard conditions without desiccant packaging or time-limited shelf life restrictions.