P6SMB400C Equivalent & Substitute Parts

Part Overview

The P6SMB400C is a bidirectional transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection in surface-mount applications. This component operates with a reverse standoff voltage of 342V and provides peak pulse power handling of 600W in a DO-214AA (SMB) package. The part is currently listed as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement.

Substiute Parts

P6SMB400C

Littelfuse Inc.In Stock: 1036P6SMB400C Datasheet

Current PartRFQ

P6SMB400CA

Eaton - Electronics DivisionIn Stock: 2035P6SMB400CA Datasheet

MFR RecommendedRFQ

P6SMB400CA

Eaton - Electronics DivisionIn Stock: 2035P6SMB400CA Datasheet

MFR RecommendedRFQ

SMBJP6KE400CA-TP

Micro Commercial CoIn Stock: 4715SMBJP6KE400CA-TP Datasheet

MFR RecommendedRFQ

TVP06B401CA-G

Comchip TechnologyIn Stock: 906TVP06B401CA-G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the P6SMB400C is determined by the following critical parameters:

• Reverse Standoff Voltage (Typ): Must be 342V
• Peak Pulse Current (10/1000µs): Must be 1.1A or greater
• Peak Pulse Power: Must be 600W
• Bidirectional Channels: Must be 1
• Package Type: Must be DO-214AA or SMB equivalent
• Mounting Type: Must be Surface Mount

All substitute parts listed maintain these core electrical and mechanical specifications, ensuring functional equivalence in circuit protection applications.

Parameter Comparison

Engineering Selection Recommendations

All three substitute parts are active products with current manufacturing status, providing long-term availability compared to the obsolete P6SMB400C. Selection among substitutes should be based on the following factors:

P6SMB400CA (Eaton - Electronics Division): Recommended as the primary substitute. Maintains identical electrical specifications and operating temperature range to the original part. RoHS compliant with unlimited moisture sensitivity rating. Packaging in Tape & Reel format supports high-volume production environments.

SMBJP6KE400CA-TP (Micro Commercial Co): Suitable alternative with extended operating temperature range to 175°C, providing thermal margin for applications with elevated ambient conditions. ROHS3 compliant. Higher inventory availability (4634 pcs) supports rapid procurement.

TVP06B401CA-G (Comchip Technology): Functionally equivalent with peak pulse current of 1.09A, meeting the 1.1A requirement. ROHS3 compliant. Appropriate for general-purpose applications where the slight current variance is acceptable.

All substitutes maintain the same package footprint (DO-214AA/SMB), enabling direct board-level replacement without layout modifications.

Frequently Asked Questions (FAQ)

Q: Can P6SMB400CA be used as a direct replacement for P6SMB400C?

A: Yes. Both parts maintain identical reverse standoff voltage (342V), peak pulse current (1.1A), and peak pulse power (600W) specifications. The package type (DO-214AA/SMB) is identical, enabling direct substitution without circuit redesign.

Q: What is the difference between the clamping voltages listed for each part?

A: The P6SMB400C specifies a maximum clamping voltage of 575.4V, while substitute parts specify 548V. Both values fall within acceptable protection thresholds for the 342V standoff voltage class. The lower clamping voltage in substitutes provides equivalent or improved transient suppression performance.

Q: Does the extended temperature range of SMBJP6KE400CA-TP affect compatibility?

A: No. The extended range to 175°C is a superset of the original -55°C to 150°C specification. This part is fully compatible and provides additional thermal margin for applications operating at elevated temperatures.

Q: Are all substitute parts RoHS compliant?

A: Yes. P6SMB400CA is RoHS compliant, while SMBJP6KE400CA-TP and TVP06B401CA-G are ROHS3 compliant. All meet environmental compliance requirements for current manufacturing standards.

Q: What is the significance of the DO-214AA (SMBJ) designation versus DO-214AA (SMB)?

A: Both designations refer to the same physical package footprint used in surface-mount applications. The SMBJ variant is a common industry designation for this package type. All parts are mechanically and electrically compatible for PCB assembly.

Q: Which substitute offers the best inventory availability?

A: SMBJP6KE400CA-TP from Micro Commercial Co currently has the highest inventory level at 4634 pcs, followed by P6SMB400CA at 1926 pcs and TVP06B401CA-G at 820 pcs.