P6KE550C-B Equivalent & Substitute Parts

Part Overview

The P6KE550C-B is a 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 part is classified as obsolete, making identification of active equivalent alternatives essential for ongoing design support and procurement continuity.

Substiute Parts

P6KE550C-B

Littelfuse Inc.In Stock: 866P6KE550C-B Datasheet

Current PartRFQ

P6KE550CA

Littelfuse Inc.In Stock: 1448P6KE550CA Datasheet

DirectRFQ

P6KE550CA-B

Littelfuse Inc.In Stock: 1082P6KE550CA-B Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the P6KE550C-B is determined by strict alignment of the following electrical and mechanical parameters:

Critical Substitution Criteria:

• Manufacturer series consistency (P6KE series)
• Zener diode type with single bidirectional channel
• Identical package format (DO-204AC / DO-15 axial through-hole)
• Operating temperature range (-55°C ~ 175°C)
• Peak pulse power rating (600W)
• RoHS3 compliance and MSL rating (1 - Unlimited)

The substitute parts P6KE550CA and P6KE550CA-B meet all mechanical and environmental requirements. Both are active products from Littelfuse Inc. within the P6KE series, maintaining identical package specifications, temperature ratings, and compliance certifications. The primary distinction between substitutes is packaging format: P6KE550CA is supplied in Cut Tape (CT), while P6KE550CA-B is supplied in Bulk packaging.

Parameter Comparison

Engineering Selection Recommendations

Both P6KE550CA and P6KE550CA-B are valid substitutes for the obsolete P6KE550C-B based on product status and compliance certifications. Both substitute parts are active products with ROHS3 compliance and REACH unaffected status, ensuring regulatory continuity and long-term availability.

Selection between the two substitutes depends on procurement and assembly requirements:

P6KE550CA (Cut Tape): Suitable for automated pick-and-place assembly operations and applications requiring tape-and-reel packaging.

P6KE550CA-B (Bulk): Suitable for manual assembly, kit builds, or applications where bulk packaging is preferred.

Both parts maintain identical electrical performance characteristics, operating temperature range, and mechanical compatibility with the original P6KE550C-B footprint and mounting requirements.

Frequently Asked Questions (FAQ)

Q: Can P6KE550CA and P6KE550CA-B be used interchangeably with P6KE550C-B?

A: Yes. Both substitute parts are mechanically and electrically compatible. The primary difference is packaging format (Cut Tape versus Bulk). Selection should be based on assembly process requirements and procurement preferences.

Q: What is the difference between the voltage ratings of the main part and substitutes?

A: The P6KE550C-B specifies 495V reverse standoff and 798V clamping voltage. The substitutes (P6KE550CA and P6KE550CA-B) specify 468V reverse standoff and 760V clamping voltage. Both operate within the same P6KE series design envelope and maintain 600W peak pulse power rating. Voltage parameter variations reflect manufacturing tolerance bands within the series specification.

Q: Are there any compliance or certification differences between the three parts?

A: No. All three parts are ROHS3 compliant with MSL rating of 1 (Unlimited). The substitute parts include additional REACH unaffected status documentation. The main part is classified as obsolete; the substitutes are active products.

Q: What is the significance of the packaging designation suffix (-B)?

A: The -B suffix indicates bulk packaging format. P6KE550CA-B is supplied in bulk; P6KE550CA is supplied in Cut Tape. Both are identical in electrical and mechanical specifications.

Q: Can this part be used for power line protection applications?

A: No. The P6KE550C-B and its substitutes are designated for general-purpose applications and are not rated for power line protection.