P6KE56C-B Equivalent & Substitute Parts

Part Overview

The P6KE56C-B is a transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose voltage clamping applications. This component features a 47.8V reverse standoff voltage with an 80.85V maximum clamping voltage and 600W peak pulse power rating in a through-hole DO-204AC (DO-15) package. The part is currently classified as obsolete, necessitating identification of active equivalent alternatives that maintain electrical and mechanical compatibility for ongoing system support and new designs.

Substiute Parts

P6KE56C-B

Littelfuse Inc.In Stock: 1164P6KE56C-B Datasheet

Current PartRFQ

P6KE56CA

Taiwan Semiconductor CorporationIn Stock: 58134P6KE56CA Datasheet

DirectRFQ

P6KE56CA-B

Littelfuse Inc.In Stock: 994P6KE56CA-B Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the P6KE56C-B is determined by the following critical parameters:

• Reverse Standoff Voltage (Typ): Must match 47.8V to ensure identical voltage regulation characteristics
• Package / Case: Must be DO-204AC or DO-15 axial configuration for mechanical and electrical compatibility
• Mounting Type: Must be through-hole to maintain PCB assembly compatibility
• Power Rating: Must maintain 600W peak pulse power capability
• Bidirectional Channels: Must be single channel (1) for equivalent functionality
• Type: Must be Zener-type TVS diode

The identified substitute parts meet these core requirements while offering active product status and improved availability compared to the obsolete P6KE56C-B.

Parameter Comparison

Engineering Selection Recommendations

P6KE56CA-B (Littelfuse Inc.) is the primary substitute for the P6KE56C-B. Both components are manufactured by Littelfuse Inc., share identical reverse standoff voltage specifications (47.8V), and are housed in compatible DO-204AC (DO-15) packages. The P6KE56CA-B maintains the full operating temperature range (-55°C ~ 175°C) and ROHS3 compliance of the original part. The clamping voltage differential (77V versus 80.85V) and peak pulse current specification (7.9A) represent acceptable operational variations within the P6KE series design envelope. Active product status ensures long-term availability and supply chain continuity.

P6KE56CA (Taiwan Semiconductor Corporation) serves as a secondary substitute option. This part maintains the critical 47.8V reverse standoff voltage and 600W power rating in a DO-15 through-hole package. The manufacturer differs from the original, and operating temperature range is not specified in available documentation. This option provides higher inventory availability (58,100 units) and may be suitable for applications where manufacturer flexibility is acceptable and temperature range requirements do not exceed standard industrial specifications.

Frequently Asked Questions (FAQ)

Q: Can P6KE56CA-B be used as a direct replacement for P6KE56C-B?

A: Yes. Both parts share the same reverse standoff voltage (47.8V), power rating (600W), package configuration (DO-204AC/DO-15), and operating temperature range (-55°C ~ 175°C). The P6KE56CA-B is manufactured by the same supplier (Littelfuse Inc.) and maintains ROHS3 compliance. The clamping voltage difference (77V vs. 80.85V) falls within acceptable design tolerances for the P6KE series.

Q: What is the difference between P6KE56CA-B and P6KE56CA?

A: Both parts are electrically equivalent with identical reverse standoff voltage (47.8V) and power rating (600W). The primary differences are manufacturer (Littelfuse Inc. versus Taiwan Semiconductor Corporation), packaging format (Bulk versus Cut Tape), and specified operating temperature range (P6KE56CA-B specifies -55°C ~ 175°C; P6KE56CA does not specify operating temperature). Both are active products with ROHS3 compliance.

Q: Are there package compatibility concerns when substituting these parts?

A: P6KE56CA-B maintains full package compatibility with P6KE56C-B, both using DO-204AC (DO-15) axial through-hole configuration. P6KE56CA uses DO-15 axial through-hole packaging, which is mechanically compatible with existing PCB designs. All three parts are suitable for identical PCB footprints and mounting procedures.

Q: Why is the clamping voltage different between the main part and substitutes?

A: The P6KE56C-B specifies 80.85V maximum clamping voltage, while P6KE56CA and P6KE56CA-B specify 77V. Both values are within the operational design envelope of the P6KE series and represent acceptable manufacturing variation. The 47.8V reverse standoff voltage remains constant across all variants, ensuring consistent voltage regulation characteristics.

Q: Which substitute should be selected for new designs?

A: P6KE56CA-B is recommended for new designs requiring full temperature range operation (-55°C ~ 175°C) and Littelfuse manufacturing continuity. P6KE56CA is suitable for applications where manufacturer flexibility is acceptable and standard industrial temperature ranges are sufficient.