SMBJ8.0A-HRA Equivalent & Substitute Parts

Part Overview

The SMBJ8.0A-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 an 8V reverse standoff voltage with a 13.6V maximum clamping voltage and 44.2A peak pulse current capability in a DO-214AA (SMB) package. The part is currently active in production with 795 units in stock. Substitute parts are identified when electrical characteristics, mechanical compatibility, and compliance certifications remain equivalent across manufacturers.

Substiute Parts

SMBJ8.0A-HRA

Littelfuse Inc.In Stock: 888SMBJ8.0A-HRA Datasheet

Current PartRFQ

SMBJ8.0A

MDDIn Stock: 26124SMBJ8.0A Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SMBJ8.0A-HRA are qualified based on the following criteria:

Electrical Parameter Equivalence:

• Voltage - Reverse Standoff (Typ): 8V
• Voltage - Breakdown (Min): 8.89V
• Voltage - Clamping (Max) @ Ipp: 13.6V
• Current - Peak Pulse (10/1000µs): 44.2A
• Power - Peak Pulse: 600W

Mechanical Compatibility:

• Package / Case: DO-214AA, SMB
• Mounting Type: Surface Mount
• Unidirectional Channels: 1

Compliance & Environmental:

• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level: 1 (Unlimited)
• REACH Status: REACH Unaffected

The SMBJ8.0A manufactured by MDD meets all electrical and mechanical requirements for direct substitution with the SMBJ8.0A-HRA.

Parameter Comparison

Engineering Selection Recommendations

The SMBJ8.0A manufactured by MDD is a direct electrical and mechanical equivalent to the SMBJ8.0A-HRA. Both parts are active products with ROHS3 compliance and REACH unaffected status. The MDD variant maintains identical voltage suppression characteristics, peak pulse current ratings, and power dissipation specifications. Both components feature MSL 1 moisture sensitivity classification, indicating unlimited shelf life under standard storage conditions.

The primary operational difference is the temperature range: the MDD part operates from -50°C to 150°C versus the Littelfuse part's -65°C to 150°C. Selection between these parts depends on the minimum operating temperature requirement of the application. For applications requiring operation below -50°C, the SMBJ8.0A-HRA is required. For applications within the -50°C to 150°C range, either part is suitable.

Frequently Asked Questions (FAQ)

Q: Can the SMBJ8.0A (MDD) be used as a direct replacement for SMBJ8.0A-HRA (Littelfuse)?

A: Yes, for applications operating at temperatures of -50°C and above. Both parts share identical electrical ratings, package specifications, and compliance certifications. The only difference is the minimum operating temperature specification.

Q: What are the critical parameters that define substitution eligibility for this TVS diode?

A: Substitution is determined by matching: reverse standoff voltage (8V), breakdown voltage (8.89V minimum), clamping voltage (13.6V maximum), peak pulse current (44.2A), package type (DO-214AA/SMB), and mounting method (surface mount). All these parameters must be identical.

Q: Are both parts suitable for general-purpose overvoltage protection applications?

A: Yes. Both the SMBJ8.0A-HRA and SMBJ8.0A are rated for general-purpose applications with identical transient suppression performance.

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. Both parts use this package, ensuring mechanical and electrical compatibility on PCBs designed for SMB-package TVS components.

Q: How does moisture sensitivity level affect component selection?

A: Both parts carry MSL 1 classification, indicating unlimited shelf life without moisture bake requirements. This simplifies inventory management and reduces handling constraints compared to higher MSL ratings.