SA180C Equivalent & Substitute Parts

Part Overview

The SA180C is a transient voltage suppressor (TVS) diode manufactured by Littelfuse, designed for general-purpose overvoltage protection in through-hole applications. This component features a 180V reverse standoff voltage with a 303.45V maximum clamping voltage and 1.7A peak pulse current capability in a DO-204AC (DO-15) axial package.

The SA180C is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or repair requirements for systems utilizing this component.

Substiute Parts

SA180C

LittelfuseIn Stock: 711SA180C Datasheet

Current PartRFQ

SA180CA

Littelfuse Inc.In Stock: 5010SA180CA Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SA180C is determined by the following critical parameters:

• Voltage - Reverse Standoff: Must match 180V
• Voltage - Clamping (Max) @ Ipp: Must be within acceptable tolerance of 303.45V
• Current - Peak Pulse (10/1000µs): Must support minimum 1.7A
• Power - Peak Pulse: Must support minimum 500W
• Package / Case: Must be DO-204AC (DO-15) axial through-hole
• Operating Temperature Range: Must cover -55°C to 175°C (TJ)
• Type: Must be Zener TVS diode
• Bidirectional Channels: Must be 1

The SA180CA qualifies as a direct substitute based on matching all critical electrical and mechanical parameters within the allowed specification range.

Parameter Comparison

Engineering Selection Recommendations

The SA180CA is a qualified substitute for the SA180C based on the following factors:

• All critical electrical parameters (reverse standoff voltage, peak pulse current, and power dissipation) are identical or within compatible tolerance.
• The voltage clamping characteristic of SA180CA (289V) is lower than SA180C (303.45V), providing improved protection margin in the same application space.
• Both components share identical package geometry (DO-204AC/DO-15), mounting type (through-hole), and operating temperature range, ensuring direct mechanical and thermal compatibility.
• SA180CA holds Active product status with ROHS3 compliance and unlimited moisture sensitivity level (MSL 1), supporting long-term supply chain availability.
• Both components carry identical regulatory classifications (ECCN: EAR99, HTSUS: 8541.10.0080).

Frequently Asked Questions (FAQ)

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

A: Yes. SA180CA meets all critical electrical and mechanical specifications required for SA180C applications. The lower clamping voltage (289V vs. 303.45V) represents an improvement in transient suppression performance. Direct board-level substitution is supported without design modification.

Q: What is the primary difference between SA180C and SA180CA?

A: The primary difference is product status and clamping voltage. SA180C is obsolete with a 303.45V maximum clamp, while SA180CA is active with a 289V maximum clamp. Both maintain identical reverse standoff voltage (180V), peak pulse current (1.7A), and package configuration.

Q: Are there any packaging or mounting differences?

A: No. Both SA180C and SA180CA use identical DO-204AC (DO-15) axial through-hole packaging. No PCB layout or assembly process modifications are required for substitution.

Q: What compliance certifications apply to SA180CA?

A: SA180CA is ROHS3 compliant with MSL 1 (unlimited moisture sensitivity level). REACH status is unaffected. Regulatory classifications match SA180C (ECCN: EAR99, HTSUS: 8541.10.0080).

Q: Why is SA180C marked as obsolete?

A: SA180C is classified as obsolete by Littelfuse. SA180CA, as an active product from the same manufacturer and series, provides continued availability for equivalent circuit protection requirements.