SA6.5C-B Equivalent & Substitute Parts

Part Overview

The SA6.5C-B is a Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for transient overvoltage protection in telecom applications. This component features a 6.5V reverse standoff voltage with an 11.2V maximum clamping voltage and 45.5A peak pulse current capability in a through-hole DO-204AC (DO-15) axial package.

The SA6.5C-B is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production and repair requirements for systems utilizing this component.

Substiute Parts

SA6.5C-B

Littelfuse Inc.In Stock: 1062SA6.5C-B Datasheet

Current PartRFQ

SA6.5CA

onsemiIn Stock: 300318SA6.5CA Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SA6.5C-B TVS diode is determined by strict equivalence across the following critical electrical and mechanical parameters:

Electrical Equivalence Criteria:

• Voltage - Reverse Standoff (Typ): 6.5V
• Voltage - Breakdown (Min): 7.22V
• Voltage - Clamping (Max) @ Ipp: 11.2V
• Current - Peak Pulse (10/1000µs): 45.5A
• Power - Peak Pulse: 500W
• Bidirectional Channels: 1
• Type: Zener

Mechanical Equivalence Criteria:

• Mounting Type: Through Hole
• Package / Case: DO-204AC (DO-15)

Operational Equivalence Criteria:

• Operating Temperature Range compatibility

The SA6.5CA manufactured by onsemi meets all electrical and mechanical equivalence requirements for direct substitution with the SA6.5C-B.

Parameter Comparison

*The SA6.5CA operates across -55°C to 175°C, which covers the upper portion of the SA6.5C-B range (-65°C to 175°C). Applications requiring operation below -55°C require design review.

Engineering Selection Recommendations

SA6.5CA (onsemi) as Primary Substitute:

The SA6.5CA is the direct electrical and mechanical equivalent of the SA6.5C-B. All critical TVS diode parameters—voltage ratings, peak pulse current, power dissipation, and package configuration—are identical. The SA6.5CA carries Active product status, ensuring ongoing availability and supply chain support.

The SA6.5CA is RoHS Compliant and carries the same ECCN (EAR99) and HTSUS (8541.10.0080) classifications as the original part, supporting regulatory and compliance requirements.

Operating Temperature Consideration:

The SA6.5CA minimum operating temperature is -55°C compared to the SA6.5C-B minimum of -65°C. For applications operating exclusively within the -55°C to 175°C range, the SA6.5CA provides full functional equivalence. Applications requiring operation below -55°C must evaluate whether the reduced lower temperature limit impacts system performance.

Supply and Inventory:

The SA6.5CA is available in significantly higher inventory quantities (300,300 pcs) compared to the SA6.5C-B (1,012 pcs), supporting both immediate procurement and long-term supply continuity.

Frequently Asked Questions (FAQ)

Q: Can the SA6.5CA directly replace the SA6.5C-B in existing designs?

A: Yes. The SA6.5CA is electrically and mechanically equivalent across all critical parameters: 6.5V reverse standoff voltage, 11.2V clamping voltage, 45.5A peak pulse current, 500W peak power, and DO-204AC (DO-15) through-hole package. Direct substitution is supported for applications operating within the -55°C to 175°C temperature range.

Q: What is the difference in operating temperature range between these parts?

A: The SA6.5C-B operates from -65°C to 175°C, while the SA6.5CA operates from -55°C to 175°C. The SA6.5CA does not support operation below -55°C. Verify that your application's minimum operating temperature requirement does not fall below -55°C before selecting the SA6.5CA.

Q: Are both parts available in the same package?

A: Yes. Both the SA6.5C-B and SA6.5CA are supplied in the DO-204AC (DO-15) axial through-hole package, ensuring mechanical compatibility in PCB layouts and assembly processes.

Q: What is the product status difference, and why does it matter?

A: The SA6.5C-B is classified as Obsolete, indicating discontinued manufacturing and limited availability. The SA6.5CA is Active, meaning it is currently manufactured and supported by onsemi. Active status ensures ongoing supply chain availability, technical support, and compliance with current manufacturing standards.

Q: Are there any compliance or regulatory differences?

A: Both parts carry identical ECCN (EAR99) and HTSUS (8541.10.0080) classifications. Both are RoHS Compliant. No regulatory or compliance barriers exist to substitution.

Q: What packaging options are available for the SA6.5CA?

A: The SA6.5CA is supplied in Bulk packaging. Confirm that bulk packaging meets your procurement and handling requirements.