P6SMBJ43C Equivalent & Substitute Parts

Part Overview

The P6SMBJ43C is a bidirectional Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection in surface-mount applications. This component features a 36.8V reverse standoff voltage and 600W peak pulse power rating in a DO-214AA (SMB) package. The product is currently listed as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement continuity.

Substiute Parts

P6SMBJ43C

Littelfuse Inc.In Stock: 1200P6SMBJ43C Datasheet

Current PartRFQ

SMBJP6KE43CA-TP

Micro Commercial CoIn Stock: 3950SMBJP6KE43CA-TP Datasheet

DirectRFQ

P6SMB43CA

Eaton - Electronics DivisionIn Stock: 1978P6SMB43CA Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the P6SMBJ43C is determined by strict equivalence across the following critical parameters:

• Reverse Standoff Voltage (Typ): 36.8V — determines the voltage threshold at which the TVS begins to conduct
• Peak Pulse Current (10/1000µs): 10.3A — defines the surge current handling capability
• Power - Peak Pulse: 600W — establishes the maximum transient energy dissipation
• Package / Case: DO-214AA (SMB) — ensures mechanical and electrical compatibility with existing PCB layouts
• Bidirectional Configuration: 1 channel — confirms protection polarity requirements
• Mounting Type: Surface Mount — maintains assembly process compatibility

Substitute parts must maintain these parameters within the specified tolerances to ensure functional equivalence in circuit protection applications.

Parameter Comparison

Engineering Selection Recommendations

Both substitute parts maintain active product status, ensuring long-term availability and manufacturing support compared to the obsolete P6SMBJ43C.

SMBJP6KE43CA-TP (Micro Commercial Co) is supplied in Tape & Reel (TR) packaging and supports an extended operating temperature range of -55°C to 175°C, providing additional thermal margin for high-temperature applications. This part maintains ROHS3 compliance and REACH unaffected status.

P6SMB43CA (Eaton - Electronics Division) is supplied in Cut Tape (CT) & Digi-Reel® packaging and is designated as manufacturer-recommended. This part maintains the original operating temperature range of -55°C to 150°C and carries RoHS compliance certification with REACH unaffected status.

Both substitutes meet the critical electrical parameters (36.8V standoff, 10.3A peak pulse, 600W power rating) and package requirements (DO-214AA SMB) necessary for direct replacement in existing designs.

Frequently Asked Questions (FAQ)

Q: Can P6SMBJ43C be directly replaced with SMBJP6KE43CA-TP or P6SMB43CA?

A: Yes. Both substitute parts maintain identical reverse standoff voltage (36.8V), peak pulse current (10.3A), power rating (600W), and package configuration (DO-214AA SMB). The electrical performance in circuit protection applications remains equivalent.

Q: What is the difference in clamping voltage between the main part and substitutes?

A: The P6SMBJ43C specifies a maximum clamping voltage of 62.27V at peak pulse current, while both substitutes specify 59.3V. This represents improved clamping performance in the substitute parts, providing lower transient voltage peaks during surge events.

Q: Does packaging format affect electrical performance?

A: No. Packaging format (Tape & Reel versus Cut Tape) affects supply chain logistics and assembly automation compatibility, not electrical characteristics. Component selection should be based on procurement and manufacturing requirements.

Q: Are there temperature range considerations for substitute selection?

A: The SMBJP6KE43CA-TP supports -55°C to 175°C operation, while P6SMB43CA supports -55°C to 150°C. For applications requiring operation above 150°C junction temperature, SMBJP6KE43CA-TP provides extended thermal capability.

Q: Do all parts carry equivalent compliance certifications?

A: Both substitutes carry RoHS compliance. SMBJP6KE43CA-TP specifies ROHS3 compliance and REACH unaffected status. P6SMB43CA carries RoHS compliance with REACH unaffected status. Verify specific compliance requirements for your application and region.