P6SMB180C Equivalent & Substitute Parts

Part Overview

The P6SMB180C is a transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose voltage clamping applications. This bidirectional Zener diode operates with a reverse standoff voltage of 154V and provides peak pulse current handling of 2.5A in a surface-mount DO-214AA (SMB) package. The part is currently listed as obsolete, making identification of active equivalent components essential for ongoing design support and procurement.

Substiute Parts

P6SMB180C

Littelfuse Inc.In Stock: 956P6SMB180C Datasheet

Current PartRFQ

P6SMB180CA

Eaton - Electronics DivisionIn Stock: 65499P6SMB180CA Datasheet

MFR RecommendedRFQ

P6SMB180CA

Eaton - Electronics DivisionIn Stock: 65499P6SMB180CA Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the obsolete P6SMB180C is based on strict electrical and mechanical parameter alignment within the P6SMB series. The substitute part P6SMB180CA maintains compatibility through the following criteria:

Critical Matching Parameters:

• Reverse standoff voltage: 154V (identical)
• Peak pulse current rating: 2.5A (identical)
• Peak pulse power: 600W (identical)
• Operating temperature range: -55°C to 150°C (identical)
• Mounting type: Surface Mount (identical)
• Package classification: DO-214AA / SMB (identical)
• Bidirectional channels: 1 (identical)

Allowable Variation:

• Voltage - Breakdown (Min): 162V (main) vs. 171V (substitute) — within acceptable tolerance for this device class
• Voltage - Clamping (Max) @ Ipp: 258.3V (main) vs. 246V (substitute) — lower clamping voltage provides equivalent or improved protection margin

The P6SMB180CA is manufactured by Eaton - Electronics Division and maintains active product status, ensuring long-term availability and supply chain continuity.

Parameter Comparison

Engineering Selection Recommendations

The P6SMB180CA is the direct active substitute for the obsolete P6SMB180C. Selection is based on the following engineering criteria:

Product Status: The P6SMB180CA maintains active product status with Eaton - Electronics Division, ensuring continued availability, manufacturing consistency, and technical support. The original P6SMB180C is obsolete and no longer manufactured.

Compliance & Certifications: Both parts meet RoHS compliance requirements. The P6SMB180C carries ROHS3 certification, while the P6SMB180CA carries standard RoHS certification. Both maintain MSL 1 (Unlimited) moisture sensitivity rating, indicating no special storage or handling requirements.

Electrical Compatibility: The substitute part maintains identical reverse standoff voltage (154V), peak pulse current (2.5A), and power dissipation (600W). The clamping voltage of 246V in the substitute is lower than the original 258.3V, which provides a tighter protection envelope and is functionally equivalent for transient suppression applications.

Mechanical & Thermal Compatibility: Identical operating temperature range (-55°C to 150°C), surface-mount configuration, and DO-214AA/SMB package ensure direct PCB-level compatibility without layout or thermal management modifications.

Frequently Asked Questions (FAQ)

Q: Can P6SMB180CA be used as a direct replacement for P6SMB180C?

A: Yes. The P6SMB180CA is electrically and mechanically compatible with the P6SMB180C. Both parts share identical reverse standoff voltage (154V), peak pulse current (2.5A), power rating (600W), operating temperature range, and package configuration. The substitute is manufactured by Eaton and maintains active product status.

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

A: The P6SMB180C has a maximum clamping voltage of 258.3V, while the P6SMB180CA has a maximum clamping voltage of 246V. The lower clamping voltage in the substitute provides a tighter voltage suppression margin and is functionally equivalent for transient protection applications.

Q: Are there any PCB layout changes required when switching from P6SMB180C to P6SMB180CA?

A: No. Both parts use identical DO-214AA (SMB) surface-mount packaging. No PCB layout, footprint, or assembly process modifications are necessary.

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

A: The P6SMB180C has a minimum breakdown voltage of 162V, while the P6SMB180CA has a minimum breakdown voltage of 171V. Both maintain the same 154V reverse standoff voltage specification. This variation is within acceptable tolerance for TVS diodes in this voltage class.

Q: Are both parts RoHS compliant?

A: Yes. The P6SMB180C is ROHS3 compliant, and the P6SMB180CA is RoHS compliant. Both meet environmental compliance requirements for electronic component manufacturing and use.

Q: What is the moisture sensitivity level for these parts?

A: Both parts carry MSL 1 (Unlimited) rating, indicating no moisture sensitivity concerns. Standard handling and storage practices are sufficient; no special dry-pack or bake-out procedures are required.

Q: Why is the P6SMB180C listed as obsolete?

A: The P6SMB180C is no longer manufactured by Littelfuse Inc. The P6SMB180CA from Eaton - Electronics Division is the active equivalent and recommended substitute for new designs and ongoing procurement.