SA160-B Equivalent & Substitute Parts

Part Overview

The SA160-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 160V reverse standoff voltage with a 259V maximum clamping voltage and 2A peak pulse current capability in a through-hole DO-204AC (DO-15) axial package.

The SA160-B is classified as obsolete. Identifying equivalent and 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

SA160-B

Littelfuse Inc.In Stock: 1093SA160-B Datasheet

Current PartRFQ

SA160A

Fairchild SemiconductorIn Stock: 7006SA160A Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SA160-B is determined by strict equivalence across the following critical electrical and mechanical parameters:

Electrical Parameters (Must Match):

• Voltage - Reverse Standoff (Typ): 160V
• Voltage - Breakdown (Min): 178V
• Voltage - Clamping (Max) @ Ipp: 259V
• Current - Peak Pulse (10/1000µs): 2A
• Power - Peak Pulse: 500W
• Type: Zener (unidirectional)
• Unidirectional Channels: 1

Mechanical Parameters (Must Match):

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

The SA160A qualifies as a direct substitute based on complete alignment with all specified electrical and mechanical parameters. Both components operate within compatible temperature ranges and share identical voltage suppression and current handling characteristics.

Parameter Comparison

*Operating temperature range: SA160A minimum operating temperature is -55°C versus SA160-B at -65°C. Both support the maximum temperature of 175°C.

Engineering Selection Recommendations

The SA160A is a direct electrical and mechanical equivalent to the SA160-B. Both components are classified as obsolete and share identical voltage suppression characteristics, current ratings, and package specifications.

Compliance Considerations:

Both the SA160-B and SA160A maintain RoHS compliance (SA160-B: RoHS Compliant; SA160A: ROHS3 Compliant), ensuring suitability for applications with environmental and regulatory compliance requirements. Both components carry the same ECCN (EAR99) and HTSUS (8541.10.0080) classifications.

Temperature Range Consideration:

The SA160A operates across a minimum temperature of -55°C, compared to the SA160-B at -65°C. For applications requiring operation below -55°C, the SA160-B specifications must be maintained. For applications operating within -55°C to 175°C, the SA160A provides full functional equivalence.

Packaging and Availability:

The SA160A is available in bulk packaging with significantly higher inventory levels (6,951 pcs) compared to the SA160-B (987 pcs), supporting supply chain continuity for production and repair applications.

Frequently Asked Questions (FAQ)

Q: Can the SA160A be used as a direct replacement for the SA160-B?

A: Yes, the SA160A is a direct electrical and mechanical equivalent. Both components share identical voltage suppression ratings (160V standoff, 259V clamping), current handling (2A peak pulse), power dissipation (500W), and package specifications (DO-204AC/DO-15 through-hole axial). Both are RoHS compliant and classified as obsolete.

Q: Are there temperature range differences between these parts?

A: Yes. The SA160-B operates from -65°C to 175°C, while the SA160A operates from -55°C to 175°C. For applications requiring operation below -55°C, the SA160-B specifications must be retained. For applications within the -55°C to 175°C range, the SA160A is fully compatible.

Q: Do these components have the same package and pinout?

A: Yes. Both the SA160-B and SA160A use the DO-204AC (DO-15) axial through-hole package with identical mechanical dimensions and lead configuration, enabling direct board-level substitution without layout modifications.

Q: What is the difference between the manufacturers?

A: The SA160-B is manufactured by Littelfuse Inc., while the SA160A is manufactured by Fairchild Semiconductor. Both manufacturers produce components within the SA series with identical electrical specifications and package standards.

Q: Are both components RoHS compliant?

A: Yes. The SA160-B is RoHS Compliant, and the SA160A is ROHS3 Compliant. Both meet environmental and regulatory compliance requirements for modern electronic applications.

Q: Which part should be selected for new designs?

A: Both components are classified as obsolete. For new designs, alternative non-obsolete TVS diode solutions should be evaluated. For legacy system support and repair, the SA160A provides superior supply chain availability (6,951 pcs in stock) compared to the SA160-B (987 pcs in stock).