P6SMB56C Equivalent & Substitute Parts

Part Overview

The P6SMB56C is a transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection in surface mount applications. This component features a 47.8V reverse standoff voltage with an 80.85V maximum clamping voltage and 7.9A peak pulse current capability in a DO-214AA (SMB) package. The part is currently listed as obsolete, making identification of suitable substitute components essential for ongoing design support and procurement continuity.

Substiute Parts

P6SMB56C

Littelfuse Inc.In Stock: 717P6SMB56C Datasheet

Current PartRFQ

P6SMB56CA

Eaton - Electronics DivisionIn Stock: 2047P6SMB56CA Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the P6SMB56C is determined by the following critical parameters:

• Voltage Rating Match: Reverse standoff voltage of 47.8V and breakdown voltage minimum of 50.4V establish the protection threshold. Substitute parts must maintain these voltage specifications to ensure equivalent circuit protection.
• Current Handling: Peak pulse current of 7.9A at 10/1000µs pulse duration defines the transient energy dissipation capability. Substitute parts must support this current level.
• Power Dissipation: 600W peak pulse power rating must be maintained to ensure thermal performance under transient conditions.
• Package Compatibility: DO-214AA (SMB) surface mount package is mandatory for PCB layout compatibility.
• Temperature Range: Operating range of -55°C to 150°C (TJ) must be supported.
• Electrical Type: Zener diode topology with single bidirectional channel configuration.

The P6SMB56CA qualifies as a direct substitute based on matching all critical parameters within acceptable engineering tolerances for this component category.

Parameter Comparison

Engineering Selection Recommendations

The P6SMB56CA (Eaton - Electronics Division) is the qualified substitute for the obsolete P6SMB56C. Selection rationale is based on the following factors:

Product Status: The P6SMB56C is obsolete, necessitating transition to an active production part. The P6SMB56CA maintains active product status with established supply chain availability (1947 pcs in stock).

Compliance & Certifications: Both parts maintain equivalent RoHS compliance status and MSL rating of 1 (Unlimited), ensuring environmental and moisture handling requirements are preserved.

Electrical Performance: The P6SMB56CA delivers equivalent protection performance with a lower maximum clamping voltage (77V vs. 80.85V), which represents improved clamping efficiency while maintaining the same reverse standoff voltage and peak pulse current specifications.

Package & Mounting: Identical DO-214AA (SMB) surface mount package ensures direct PCB layout compatibility without redesign requirements.

Application Continuity: Both parts are classified as general-purpose TVS diodes with equivalent thermal and electrical characteristics across the specified operating temperature range.

Frequently Asked Questions (FAQ)

Q: Can P6SMB56CA be used as a direct replacement for P6SMB56C without circuit modifications?

A: Yes. The P6SMB56CA is electrically and mechanically compatible with the P6SMB56C. Both parts share identical reverse standoff voltage (47.8V), peak pulse current (7.9A), power dissipation (600W), operating temperature range (-55 to 150°C), and DO-214AA (SMB) package configuration. No circuit modifications are required.

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

A: The P6SMB56C specifies a maximum clamping voltage of 80.85V, while the P6SMB56CA specifies 77V. The lower clamping voltage of the P6SMB56CA represents improved transient suppression efficiency and is acceptable for applications designed around the P6SMB56C specification.

Q: Are there any compliance or certification differences?

A: Both parts maintain RoHS compliance and MSL rating of 1 (Unlimited). The P6SMB56C is ROHS3 compliant, while the P6SMB56CA is RoHS compliant. Both certifications are acceptable for equivalent environmental and handling requirements.

Q: What is the packaging format for the P6SMB56CA?

A: The P6SMB56CA is supplied in Cut Tape (CT) and Digi-Reel® packaging formats, providing standard surface mount component delivery options compatible with automated assembly processes.

Q: Why is the P6SMB56C listed as obsolete?

A: The P6SMB56C has reached end-of-life status with Littelfuse Inc. The P6SMB56CA from Eaton - Electronics Division provides equivalent functionality and is actively manufactured, ensuring long-term design support and procurement availability.