P6SMB540C Equivalent & Substitute Parts

Part Overview

The P6SMB540C is a transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection applications. This component features a 460V reverse standoff voltage with a 777V maximum clamping voltage and 800mA peak pulse current capability in a surface-mount DO-214AA (SMB) package. The part is currently classified as obsolete, making identification of suitable substitute components necessary for ongoing design support and procurement.

Substiute Parts

P6SMB540C

Littelfuse Inc.In Stock: 1003P6SMB540C Datasheet

Current PartRFQ

P6SMB540CA

Eaton - Electronics DivisionIn Stock: 1937P6SMB540CA Datasheet

MFR RecommendedRFQ

P6SMB540CA

Eaton - Electronics DivisionIn Stock: 1937P6SMB540CA Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the P6SMB540C is determined by the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

• Reverse standoff voltage: 460V (must match)
• Peak pulse current: 800mA (must match)
• Power dissipation: 600W (must match)
• Bidirectional channels: 1 (must match)
• Type: Zener (must match)

Mechanical Compatibility Criteria:

• Mounting type: Surface Mount (must match)
• Package / Case: DO-214AA, SMB (must match)
• Operating temperature range: -55°C ~ 150°C (must match)

Compliance Criteria:

• RoHS compliance status
• Moisture sensitivity level

The P6SMB540CA from Eaton - Electronics Division satisfies all mandatory electrical and mechanical parameters while maintaining equivalent functional performance in transient voltage suppression applications.

Parameter Comparison

Engineering Selection Recommendations

The P6SMB540CA is the designated substitute for the obsolete P6SMB540C. Both components share identical reverse standoff voltage, peak pulse current, and power dissipation ratings. The P6SMB540CA maintains active product status with current manufacturing support from Eaton - Electronics Division, ensuring long-term availability and supply chain continuity.

Both parts comply with RoHS requirements and feature unlimited moisture sensitivity classification (MSL 1), supporting standard surface-mount assembly processes without additional handling precautions. The electrical performance characteristics remain equivalent for general-purpose transient voltage suppression applications, with the P6SMB540CA clamping voltage specification (740V) providing slightly improved transient response compared to the original part (777V).

Frequently Asked Questions (FAQ)

Q: Can the P6SMB540CA directly replace the P6SMB540C in existing designs?

A: Yes. Both components share identical reverse standoff voltage (460V), peak pulse current (800mA), power dissipation (600W), operating temperature range (-55°C ~ 150°C), and surface-mount DO-214AA (SMB) package specifications. The P6SMB540CA is the manufacturer-recommended substitute.

Q: What is the difference in clamping voltage between these parts?

A: The P6SMB540C specifies a maximum clamping voltage of 777V, while the P6SMB540CA specifies 740V. Both values fall within acceptable transient suppression performance for the 460V standoff voltage class and do not affect functional compatibility in general-purpose applications.

Q: Are there any compliance or certification differences?

A: Both parts are RoHS compliant and feature MSL 1 (unlimited) moisture sensitivity classification. The P6SMB540C carries ROHS3 compliance, while the P6SMB540CA carries standard RoHS compliance. Both support standard surface-mount assembly processes.

Q: Why is the P6SMB540C listed as obsolete?

A: The P6SMB540C has been discontinued by Littelfuse Inc. The P6SMB540CA from Eaton - Electronics Division is the active equivalent part for new designs and ongoing procurement.

Q: Are the packaging formats identical?

A: Yes. Both parts use the DO-214AA (SMB) surface-mount package. The P6SMB540CA is supplied in Tape & Reel (TR) format, which is standard for high-volume surface-mount assembly operations.