SACB8.0 Equivalent & Substitute Parts

Part Overview

The SACB8.0 is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection applications. This surface-mount component operates across a wide temperature range of -55°C to 150°C and is RoHS3 compliant. The part is currently in active production status with 705 units available in inventory. Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within the specified parameter tolerances for this TVS diode category.

Substiute Parts

SACB8.0

Littelfuse Inc.In Stock: 750SACB8.0 Datasheet

Current PartRFQ

SMBJ8.0A

MDDIn Stock: 26124SMBJ8.0A Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SACB8.0 is determined by the following critical parameters:

• Reverse Standoff Voltage: Must be 8V (nominal)
• Breakdown Voltage (Min): Must be 8.89V or higher
• Clamping Voltage (Max): Must not exceed 13.4V to maintain circuit protection integrity
• Peak Pulse Current: Must meet or exceed 36A at 10/1000µs pulse duration
• Peak Pulse Power: Must support 500W or greater dissipation
• Package Compatibility: Must be DO-214AA/SMB surface-mount format
• Compliance: Must maintain RoHS3 compliance and REACH unaffected status

The SMBJ8.0A from MDD meets all substitution criteria within these electrical and mechanical boundaries.

Parameter Comparison

Engineering Selection Recommendations

The SMBJ8.0A is a direct substitute for the SACB8.0 based on the following engineering criteria:

• Both parts maintain identical reverse standoff voltage (8V) and breakdown voltage (8.89V minimum)
• The SMBJ8.0A provides enhanced performance margins with 44.2A peak pulse current versus 36A, and 600W peak pulse power versus 500W
• Clamping voltage differential of 0.2V (13.6V vs 13.4V) remains within acceptable circuit protection tolerances
• Identical DO-214AA/SMB package and surface-mount configuration ensure mechanical and thermal compatibility
• Both parts are RoHS3 compliant and REACH unaffected, meeting regulatory requirements
• Operating temperature range of the SMBJ8.0A (-50 to 150°C) covers the primary operating window, with the lower limit 5°C higher than the SACB8.0

The SMBJ8.0A is suitable for direct replacement in applications where the SACB8.0 is specified, with the added benefit of higher current and power handling capacity.

Frequently Asked Questions (FAQ)

Q: Can the SMBJ8.0A replace the SACB8.0 in existing designs?

A: Yes. Both parts share identical reverse standoff voltage (8V), breakdown voltage (8.89V), and package format (DO-214AA/SMB). The SMBJ8.0A meets or exceeds all electrical performance requirements of the SACB8.0.

Q: What is the significance of the 0.2V difference in clamping voltage?

A: The SMBJ8.0A clamps at 13.6V maximum versus 13.4V for the SACB8.0. This 0.2V difference is within normal manufacturing tolerance for TVS diodes and does not compromise circuit protection performance in general-purpose applications.

Q: Are there temperature range limitations with the SMBJ8.0A?

A: The SMBJ8.0A operates from -50°C to 150°C, compared to the SACB8.0 range of -55°C to 150°C. For applications requiring operation below -50°C, the SACB8.0 is required. For standard industrial and commercial temperature ranges, the SMBJ8.0A is fully compatible.

Q: Do both parts use the same PCB footprint?

A: Yes. Both the SACB8.0 and SMBJ8.0A use the DO-214AA/SMB package format with identical surface-mount footprints, requiring no PCB layout modifications.

Q: What compliance certifications apply to both parts?

A: Both parts are RoHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic component manufacturing and use.

Q: Why does the SMBJ8.0A have higher peak pulse current and power ratings?

A: The SMBJ8.0A is rated for 44.2A peak pulse current and 600W peak pulse power, exceeding the SACB8.0 specifications of 36A and 500W. This provides additional design margin and transient protection capability without changing the core voltage protection characteristics.