P6KE550 Equivalent & Substitute Parts

Part Overview

The P6KE550 is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection applications. This component features a 495V reverse standoff voltage with 798V maximum clamping voltage and 600W peak pulse power rating in a through-hole DO-204AC (DO-15) axial package.

The P6KE550 is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or maintenance requirements for systems utilizing this component.

Substiute Parts

P6KE550

Littelfuse Inc.In Stock: 893P6KE550 Datasheet

Current PartRFQ

P6KE550A

Good-Ark SemiconductorIn Stock: 1397P6KE550A Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the P6KE550 is determined by the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

• Unidirectional TVS diode topology (single channel)
• Voltage rating class: 495V reverse standoff minimum
• Clamping voltage performance: maximum 798V @ Ipp
• Power dissipation capability: 600W peak pulse
• Zener diode type classification

Mechanical Compatibility Criteria:

• Through-hole mounting configuration
• DO-204AC (DO-15) axial package form factor
• Physical dimensions compatible with existing PCB layouts

Compliance & Availability:

• ROHS3 compliance required
• Active or current product status preferred for long-term supply assurance
• Moisture sensitivity level MSL 1 (unlimited shelf life)

The P6KE550A from Good-Ark Semiconductor meets these substitution criteria within the allowed parameter tolerances for this product category.

Parameter Comparison

Engineering Selection Recommendations

The P6KE550A from Good-Ark Semiconductor is a direct substitute for the obsolete P6KE550. Both components share identical mechanical compatibility (DO-204AC through-hole axial package), matching power dissipation ratings (600W peak pulse), and equivalent electrical performance within the specified voltage and current ranges.

The P6KE550A offers the advantage of active product status, ensuring continued availability and supply chain support. Both parts maintain ROHS3 compliance and MSL 1 moisture sensitivity classification, meeting environmental and regulatory requirements.

The P6KE550A operates across a slightly narrower temperature range (-55°C to 150°C versus -55°C to 175°C), which is acceptable for most general-purpose overvoltage protection applications. The reverse standoff voltage (467V typical) and clamping voltage (760V maximum) remain within functional parameters for 550V-class protection circuits.

Frequently Asked Questions (FAQ)

Q: Can the P6KE550A directly replace the P6KE550 in existing designs?

A: Yes. Both components are unidirectional TVS diodes with identical package form factors (DO-204AC axial), matching power ratings (600W), and compatible voltage characteristics. The P6KE550A is electrically and mechanically interchangeable for general-purpose transient suppression applications.

Q: What is the difference in operating temperature range between these parts?

A: The P6KE550 operates from -55°C to 175°C, while the P6KE550A operates from -55°C to 150°C. For applications requiring operation above 150°C junction temperature, the original P6KE550 specification must be maintained. For standard industrial and commercial applications, the P6KE550A temperature range is sufficient.

Q: Are both parts RoHS compliant?

A: Yes. Both the P6KE550 and P6KE550A are ROHS3 compliant and carry MSL 1 (unlimited) moisture sensitivity classification, meeting current environmental and regulatory standards.

Q: Why is the P6KE550 listed as obsolete?

A: The P6KE550 has been discontinued by Littelfuse Inc. The P6KE550A from Good-Ark Semiconductor provides equivalent functionality with active product status, ensuring long-term supply availability and support.

Q: Are there any packaging differences between these parts?

A: No. Both components use identical DO-204AC (DO-15) axial through-hole packaging. The P6KE550A is supplied in cut tape (CT) format, which is standard for component distribution and compatible with existing assembly processes.