P6KE43-B Equivalent & Substitute Parts

Part Overview

The P6KE43-B is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose transient voltage protection applications. This component features a 36.8V reverse standoff voltage with a 62.27V 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 equivalent substitute parts necessary for ongoing design support and procurement.

Substiute Parts

P6KE43-B

Littelfuse Inc.In Stock: 1083P6KE43-B Datasheet

Current PartRFQ

P6KE43A

Diotec SemiconductorIn Stock: 10406P6KE43A Datasheet

DirectRFQ

P6KE43A-B

Littelfuse Inc.In Stock: 1113P6KE43A-B Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the P6KE43-B are qualified based on the following critical electrical and mechanical parameters:

• Voltage - Reverse Standoff (Typ): 36.8V
• Voltage - Breakdown (Min): 38.75V minimum
• Voltage - Clamping (Max) @ Ipp: 62.27V maximum
• Power - Peak Pulse: 600W
• Unidirectional Channels: 1
• Mounting Type: Through Hole
• Package / Case: DO-204AC / DO-15 Axial

Substitute parts must maintain identical reverse standoff voltage, support the same peak pulse power rating, and use compatible through-hole axial packaging. Breakdown voltage and clamping voltage must remain within the specified ranges to ensure proper transient suppression performance in the original application circuit.

Parameter Comparison

Engineering Selection Recommendations

Both substitute parts maintain full electrical and mechanical compatibility with the P6KE43-B within the specified parameter ranges. Selection between available substitutes should be based on the following factors:

P6KE43A-B (Littelfuse Inc.) is the primary substitute, maintaining the same manufacturer as the original part with active product status. This part offers continuity in supply chain qualification and documentation consistency. Operating temperature range extends to -55°C, matching the original specification.

P6KE43A (Diotec Semiconductor) provides an alternative from a different manufacturer with active product status. This part meets all electrical requirements and maintains compatible packaging. The operating temperature range extends to -50°C, which is acceptable for most general-purpose applications but represents a 5°C reduction at the lower temperature extreme compared to the original specification.

Both substitute parts are ROHS3 compliant and suitable for direct replacement in existing designs. Procurement availability and lead time should be evaluated based on current inventory and supply chain requirements.

Frequently Asked Questions (FAQ)

Q: Can P6KE43A-B and P6KE43A be used interchangeably with P6KE43-B?

A: Yes, both parts meet the critical electrical parameters: 36.8V reverse standoff voltage, 600W peak pulse power rating, and compatible DO-204AC/DO-15 through-hole axial packaging. The clamping voltage of 59.3V on both substitutes is lower than the original 62.27V, providing improved transient suppression performance.

Q: What is the difference between P6KE43A-B and P6KE43A?

A: P6KE43A-B is manufactured by Littelfuse Inc. with packaging specified as Bulk and operating temperature range of -55°C to 175°C. P6KE43A is manufactured by Diotec Semiconductor with operating temperature range of -50°C to 175°C. Both parts share identical electrical specifications and package type.

Q: Are there any temperature limitations when substituting these parts?

A: P6KE43A from Diotec Semiconductor has a minimum operating temperature of -50°C compared to -55°C for the original and P6KE43A-B. Applications requiring operation below -50°C should use P6KE43A-B to maintain full temperature range compatibility.

Q: Do the substitute parts require any circuit modifications?

A: No circuit modifications are required. Both substitute parts are pin-compatible and electrically equivalent within the specified parameter ranges. Direct board-level replacement is supported.

Q: What packaging considerations apply to these parts?

A: All three parts use identical through-hole DO-204AC (DO-15) axial packaging. No PCB layout or mechanical mounting changes are necessary when substituting between these parts.