SMBJ7.5A-HRA Equivalent & Substitute Parts

Part Overview

The SMBJ7.5A-HRA is a unidirectional transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection in surface-mount applications. This component features a 7.5V reverse standoff voltage with a 12.9V maximum clamping voltage and 46.6A peak pulse current capability in a DO-214AA (SMB) package. The part is currently active in production with full RoHS3 compliance and unlimited moisture sensitivity rating. Substitute parts are identified when electrical characteristics, mechanical compatibility, and regulatory compliance align with the original specification.

Substiute Parts

SMBJ7.5A-HRA

Littelfuse Inc.In Stock: 986SMBJ7.5A-HRA Datasheet

Current PartRFQ

SMBJ7.5A

MDDIn Stock: 22756SMBJ7.5A Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SMBJ7.5A-HRA is determined by strict alignment of the following critical parameters:

• Voltage - Reverse Standoff (Typ): 7.5V
• Voltage - Breakdown (Min): 8.33V
• Voltage - Clamping (Max) @ Ipp: 12.9V
• Current - Peak Pulse (10/1000µs): 46.6A
• Power - Peak Pulse: 600W
• Package / Case: DO-214AA, SMB
• Mounting Type: Surface Mount
• RoHS Status: ROHS3 Compliant

The SMBJ7.5A manufactured by MDD meets all electrical and mechanical requirements for direct substitution. Both parts share identical voltage ratings, peak pulse current specifications, and package geometry. Both maintain active product status and ROHS3 compliance.

Parameter Comparison

Engineering Selection Recommendations

Both the SMBJ7.5A-HRA and SMBJ7.5A are active products with identical electrical performance specifications and package compatibility. Selection between these parts may be based on supply chain availability, lead time, or procurement preferences. The SMBJ7.5A-HRA maintains a wider operating temperature range (-65°C to 150°C) compared to the MDD substitute (-50°C to 150°C). For applications requiring operation below -50°C, the Littelfuse SMBJ7.5A-HRA is the appropriate choice. Both parts carry ROHS3 compliance and unlimited moisture sensitivity rating, suitable for standard manufacturing and storage conditions.

Frequently Asked Questions (FAQ)

Q: Can SMBJ7.5A (MDD) be used as a direct replacement for SMBJ7.5A-HRA (Littelfuse)?

A: Yes, the SMBJ7.5A from MDD is electrically and mechanically compatible for general-purpose applications. Both parts share identical voltage ratings (7.5V standoff, 12.9V clamping), peak pulse current (46.6A), and DO-214AA package geometry. The primary difference is the operating temperature range, with the Littelfuse part rated to -65°C versus -50°C for the MDD variant.

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

A: DO-214AA is the industry-standard package designation for SMB (Surface Mount Body) TVS diodes. This package ensures mechanical and electrical compatibility across manufacturers. Both the main part and substitute use this identical package, confirming PCB footprint and lead compatibility.

Q: Are there any compliance differences between these parts?

A: Both parts are ROHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity ratings. No compliance restrictions apply to either part for standard manufacturing environments.

Q: What determines whether a substitute part is acceptable?

A: Substitution is based on matching electrical parameters (voltage ratings, peak pulse current, power dissipation), package type (DO-214AA), mounting method (surface mount), and regulatory compliance (ROHS3). Deviations in any of these parameters disqualify a part from direct substitution.

Q: Does operating temperature range affect substitution eligibility?

A: Operating temperature range is a secondary consideration for general-purpose applications. The SMBJ7.5A-HRA supports -65°C to 150°C, while the MDD substitute supports -50°C to 150°C. For applications requiring operation below -50°C, the Littelfuse part is required. For standard temperature ranges, both parts are functionally equivalent.