SA10-B Equivalent & Substitute Parts

Part Overview

The SA10-B is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for transient overvoltage protection in telecom applications. This component features a 10V reverse standoff voltage with a 17V maximum clamping voltage and 30A peak pulse current capability in a through-hole DO-204AC (DO-15) axial package.

The SA10-B is classified as obsolete. Locating equivalent substitute parts is necessary to maintain design continuity and ensure component availability for new production runs, repairs, and system upgrades where this protection function remains required.

Substiute Parts

SA10-B

Littelfuse Inc.In Stock: 991SA10-B Datasheet

Current PartRFQ

SA10A

Taiwan Semiconductor CorporationIn Stock: 2322SA10A Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SA10-B TVS diode are identified based on electrical and mechanical parameter equivalence. The following criteria determine substitution eligibility:

Electrical Parameters (Must Match):

• Voltage - Reverse Standoff (Typ): 10V
• Voltage - Breakdown (Min): 11.1V
• Voltage - Clamping (Max) @ Ipp: 17V
• Current - Peak Pulse (10/1000µs): 30A
• Power - Peak Pulse: 500W
• Type: Zener
• Unidirectional Channels: 1

Mechanical Parameters (Must Match):

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

Acceptable Variations:

• Operating temperature range may differ provided the substitute meets or exceeds the original specification
• Packaging format (Tape & Reel vs. bulk) does not affect electrical or mechanical compatibility
• Manufacturer origin does not affect substitution eligibility when electrical and mechanical parameters are identical

Parameter Comparison

*The SA10A operates from -55°C to 175°C, which does not cover the full lower temperature range of the SA10-B (-65°C). Applications requiring operation below -55°C must verify compatibility with the substitute part's temperature specification.

Engineering Selection Recommendations

The SA10A from Taiwan Semiconductor Corporation is a direct electrical and mechanical equivalent to the SA10-B. All critical TVS diode parameters—voltage ratings, peak pulse current, power dissipation, package type, and mounting configuration—are identical.

Substitution Basis:

The SA10A is suitable for direct replacement in applications where the operating temperature range does not require operation below -55°C. The original SA10-B specification extends to -65°C; the SA10A minimum operating temperature is -55°C. Applications operating exclusively within the -55°C to 175°C range encounter no functional limitations.

Both parts carry RoHS compliance certifications (RoHS Compliant for SA10-B; ROHS3 Compliant for SA10A), confirming environmental regulatory alignment. The SA10A holds Active product status, ensuring ongoing availability and supply chain continuity compared to the Obsolete SA10-B.

Packaging format differences (Tape & Reel for SA10A versus unspecified for SA10-B) do not affect electrical performance or mechanical fit. Component selection between these formats depends on production volume and assembly process requirements.

Frequently Asked Questions (FAQ)

Q: Can the SA10A replace the SA10-B in all applications?

A: The SA10A is electrically and mechanically equivalent to the SA10-B for all applications operating within the -55°C to 175°C temperature range. Applications requiring operation below -55°C must confirm that the reduced lower temperature limit does not violate system requirements.

Q: Are there differences in RoHS compliance between these parts?

A: Both parts are RoHS compliant. The SA10-B carries RoHS Compliant status, while the SA10A carries ROHS3 Compliant status. Both meet current environmental regulatory requirements for electronic components.

Q: Does the Tape & Reel packaging of the SA10A affect compatibility?

A: No. Tape & Reel packaging is a supply format used for automated assembly processes. The component itself—its electrical characteristics, physical dimensions, and pin configuration—remains identical to bulk packaging formats. Packaging format selection depends on production volume and assembly equipment compatibility, not on functional substitution.

Q: What is the significance of the SA10A being Active status versus the SA10-B being Obsolete?

A: Active status indicates the SA10A is in current production with ongoing manufacturer support and supply availability. Obsolete status for the SA10-B indicates it is no longer manufactured. For new designs or production continuity, the Active SA10A is the appropriate selection.

Q: Are there any applications where the SA10-B cannot be substituted?

A: The SA10-B cannot be substituted in applications requiring guaranteed operation below -55°C. The SA10A's minimum operating temperature is -55°C, which does not meet the SA10-B's -65°C specification. Verify your application's minimum operating temperature requirement before selecting the substitute.

Q: Do the parts have identical pin configurations and footprints?

A: Yes. Both parts use the DO-204AC (DO-15) axial through-hole package with identical physical dimensions and pin spacing. Direct board-level substitution is mechanically compatible without PCB modifications.