SA180C-B Equivalent & Substitute Parts

Part Overview

The SA180C-B is a Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for telecom applications. This component features a 180V reverse standoff voltage with a 289V maximum clamping voltage and 1.7A peak pulse current capability in a through-hole DO-204AC (DO-15) axial package.

The SA180C-B carries an Obsolete product status. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production and field service requirements for systems utilizing this TVS diode.

Substiute Parts

SA180C-B

Littelfuse Inc.In Stock: 965SA180C-B Datasheet

Current PartRFQ

SA180CA

Littelfuse Inc.In Stock: 5010SA180CA Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SA180C-B is determined by strict equivalence across the following electrical and mechanical parameters:

Electrical Equivalence Criteria:

• Voltage - Reverse Standoff (Typ): 180V
• Voltage - Breakdown (Min): 200V
• Voltage - Clamping (Max) @ Ipp: 289V
• Current - Peak Pulse (10/1000µs): 1.7A
• Power - Peak Pulse: 500W
• Bidirectional Channels: 1
• Type: Zener

Mechanical Equivalence Criteria:

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

Compliance Criteria:

• RoHS Status: RoHS Compliant or ROHS3 Compliant
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

The SA180CA meets all electrical and mechanical equivalence criteria and is classified as a direct substitute for the SA180C-B.

Parameter Comparison

*Operating temperature minimum: SA180CA operates from -55°C, while SA180C-B operates from -65°C. For applications requiring operation below -55°C, the SA180CA does not provide full temperature range coverage.

Engineering Selection Recommendations

SA180CA as Direct Substitute:

The SA180CA is a direct electrical and mechanical equivalent to the SA180C-B. Both components share identical voltage ratings, current specifications, power dissipation capability, and package configuration. The SA180CA is manufactured by the same supplier (Littelfuse Inc.) within the same SA series.

Compliance Status:

The SA180CA carries Active product status with ROHS3 compliance certification, providing superior long-term supply chain availability compared to the Obsolete SA180C-B. Both components maintain MSL 1 (Unlimited) moisture sensitivity classification, indicating no special storage or handling requirements.

Temperature Range Consideration:

The SA180CA specifies an operating temperature range of -55°C to 175°C, compared to the SA180C-B range of -65°C to 175°C. Applications requiring operation below -55°C ambient or junction temperature must evaluate whether this reduced lower temperature limit impacts system performance.

Packaging Availability:

The SA180C-B is supplied in standard packaging, while the SA180CA is available in Cut Tape (CT) packaging. Both maintain the same DO-204AC (DO-15) axial through-hole package configuration, ensuring mechanical and electrical compatibility in PCB designs.

Frequently Asked Questions (FAQ)

Q: Can the SA180CA be used as a direct replacement for the SA180C-B in existing designs?

A: Yes, the SA180CA is a direct substitute. Both components have identical electrical specifications (180V standoff, 289V clamping, 1.7A peak pulse current, 500W peak power) and the same DO-204AC through-hole package. No circuit modifications are required.

Q: What is the difference between the SA180C-B and SA180CA?

A: The primary differences are product status and operating temperature range. The SA180C-B is Obsolete with a -65°C to 175°C operating range, while the SA180CA is Active with a -55°C to 175°C operating range. The SA180CA also features ROHS3 compliance versus RoHS compliance for the SA180C-B.

Q: Are there any packaging differences between these parts?

A: Both components use the DO-204AC (DO-15) axial through-hole package. The SA180C-B is supplied in standard packaging, while the SA180CA is available in Cut Tape (CT) format. The physical component dimensions and pin configuration are identical.

Q: Does the SA180CA meet RoHS requirements?

A: Yes, the SA180CA is ROHS3 compliant. The SA180C-B is RoHS compliant. Both meet current environmental and regulatory standards for electronic components.

Q: What is the moisture sensitivity level for these TVS diodes?

A: Both the SA180C-B and SA180CA have an MSL rating of 1 (Unlimited), indicating no moisture sensitivity. These components do not require special dry-pack storage or baking procedures prior to assembly.

Q: Can I use the SA180CA in applications requiring operation below -55°C?

A: The SA180CA is rated for operation down to -55°C junction temperature. If your application requires operation below -55°C, verify that the SA180CA's lower temperature limit meets your system requirements. The SA180C-B supports operation to -65°C.

Q: Are both parts suitable for telecom applications?

A: The SA180C-B is specifically listed for telecom applications. The SA180CA is designated for general purpose applications. Both components have identical electrical and mechanical specifications, making the SA180CA suitable for telecom use based on performance characteristics.