SAC8.0 Equivalent & Substitute Parts

Part Overview

The SAC8.0 is an 8V Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose transient protection applications. This unidirectional Zener diode features a 13.4V maximum clamping voltage and 36A peak pulse current capability in a through-hole DO-204AC (DO-15) axial package. The component is ROHS3 compliant and rated for operating temperatures from -55°C to 175°C. Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within the specified parameter ranges for this product category.

Substiute Parts

SAC8.0

Littelfuse Inc.In Stock: 821SAC8.0 Datasheet

Current PartRFQ

P6KE9.1A

Taiwan Semiconductor CorporationIn Stock: 300384P6KE9.1A Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of TVS diodes is determined by electrical and mechanical compatibility within the following critical parameters:

• Voltage Rating Compatibility: Reverse standoff voltage, breakdown voltage minimum, and clamping voltage maximum must fall within acceptable tolerance ranges for the protected circuit.
• Current Handling: Peak pulse current capability must meet or exceed the application requirement.
• Power Dissipation: Peak pulse power rating must support the transient energy absorption requirement.
• Package Compatibility: Mechanical form factor must be identical (DO-204AC/DO-15 axial through-hole).
• Temperature Range: Operating temperature range must encompass the application environment.
• Compliance: RoHS and regulatory status must match or exceed the original specification.

The P6KE9.1A qualifies as a substitute based on matching clamping voltage (13.4V), identical package type (DO-204AC/DO-15), equivalent temperature range (-55°C to 175°C), and superior current handling (47A vs. 36A) and power rating (600W vs. 500W).

Parameter Comparison

Engineering Selection Recommendations

Both the SAC8.0 and P6KE9.1A are active products with ROHS3 compliance and identical clamping voltage specifications. The P6KE9.1A provides higher peak pulse current (47A) and power dissipation (600W) compared to the SAC8.0 (36A, 500W), making it suitable for applications requiring greater transient energy absorption. The reverse standoff voltage of the P6KE9.1A (7.78V typical) is marginally lower than the SAC8.0 (8V typical), with breakdown minimums of 8.65V and 8.89V respectively. Both components maintain identical operating temperature ranges and package configurations, ensuring direct mechanical and thermal compatibility in through-hole PCB applications.

Frequently Asked Questions (FAQ)

Q: Can the P6KE9.1A directly replace the SAC8.0 in existing designs?

A: Yes, provided the circuit design accommodates the slightly lower reverse standoff voltage (7.78V vs. 8V). The identical clamping voltage (13.4V), package type (DO-204AC/DO-15), and temperature range ensure mechanical and thermal compatibility.

Q: What is the significance of the clamping voltage match?

A: The clamping voltage determines the maximum voltage spike that reaches the protected circuit. Both parts clamp at 13.4V, ensuring equivalent transient protection performance.

Q: Does the higher current rating of the P6KE9.1A affect circuit operation?

A: No. Higher current and power ratings indicate greater transient energy handling capability. This is a performance advantage and does not negatively impact circuit operation.

Q: Are both parts suitable for the same operating temperature range?

A: Yes. Both the SAC8.0 and P6KE9.1A operate across -55°C to 175°C, making them interchangeable for temperature-dependent applications.

Q: What compliance certifications apply to both parts?

A: Both components are ROHS3 compliant and carry EAR99 export classification, meeting current regulatory requirements for electronic component distribution.