SA85CA Transient Voltage Suppressor (TVS) Diode - Equivalent & Substitute Parts

Part Overview

The SA85CA is an active Littelfuse Inc. transient voltage suppressor diode designed for general-purpose overvoltage protection applications. This through-hole component operates with an 85V reverse standoff voltage and provides 137V maximum clamping voltage at peak pulse current. The SA85CA is supplied in tape and reel packaging and maintains full RoHS3 compliance with unlimited moisture sensitivity rating.

Substitute parts are identified to provide equivalent or enhanced performance characteristics for applications requiring component alternatives due to inventory availability, supply chain considerations, or design flexibility within the specified electrical and mechanical parameters.

Substiute Parts

SA85CA

Littelfuse Inc.In Stock: 1105SA85CA Datasheet

Current PartRFQ

P6KE100CA

Fairchild SemiconductorIn Stock: 1543P6KE100CA Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SA85CA are qualified based on the following electrical and mechanical criteria:

• Voltage - Reverse Standoff within ±1V tolerance of 85V
• Voltage - Clamping (Max) @ Ipp matching 137V specification
• Current - Peak Pulse (10/1000µs) equal to or exceeding 3.7A
• Package / Case compatibility: DO-204AC (DO-15) axial through-hole configuration
• Mounting Type: Through Hole
• Type: Zener diode, single bidirectional channel
• Operating Temperature Range: Minimum -50°C to maximum 175°C (TJ)
• RoHS3 compliance and EAR99 ECCN classification

The P6KE100CA meets all substitution criteria with enhanced current handling capability (4.5A vs. 3.7A) and increased power dissipation (600W vs. 500W), while maintaining identical voltage specifications and package compatibility.

Parameter Comparison

Engineering Selection Recommendations

Both the SA85CA and P6KE100CA are active products with RoHS3 compliance and EAR99 export classification. The P6KE100CA provides enhanced electrical performance with 4.5A peak pulse current capability versus 3.7A for the SA85CA, and 600W peak pulse power versus 500W. Both components maintain identical voltage clamping specifications at 137V maximum.

The SA85CA operates across a wider temperature range (-55°C to 175°C) compared to the P6KE100CA (-50°C to 175°C). Component selection should be based on specific application requirements regarding peak current handling, power dissipation margin, and minimum operating temperature constraints.

Frequently Asked Questions (FAQ)

Q: Can the P6KE100CA directly replace the SA85CA in existing designs?

A: Yes. Both components share identical DO-204AC (DO-15) axial through-hole packaging, matching voltage clamping specifications (137V), and equivalent reverse standoff voltage (85V nominal). The P6KE100CA provides higher current and power ratings, making it suitable for applications requiring enhanced transient suppression capability.

Q: What are the key differences between these two TVS diodes?

A: The primary differences are peak pulse current (P6KE100CA: 4.5A vs. SA85CA: 3.7A), peak pulse power (P6KE100CA: 600W vs. SA85CA: 500W), and minimum operating temperature (P6KE100CA: -50°C vs. SA85CA: -55°C). Voltage specifications remain identical.

Q: Are both parts suitable for general-purpose overvoltage protection?

A: Yes. Both the SA85CA and P6KE100CA are classified for general-purpose applications and provide equivalent transient voltage suppression functionality within their respective current and power ratings.

Q: Do packaging and mounting considerations differ between these parts?

A: No. Both components use identical DO-204AC (DO-15) axial through-hole packaging and mounting configuration, ensuring mechanical and electrical compatibility in PCB designs.

Q: What compliance certifications apply to both parts?

A: Both the SA85CA and P6KE100CA are RoHS3 compliant and classified under EAR99 export control. The SA85CA carries REACH Unaffected status, while the P6KE100CA compliance documentation should be verified for specific regulatory requirements.