P6SMBJ51C Equivalent & Substitute Parts

Part Overview

The P6SMBJ51C is a bidirectional transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc. in the DO-214AA (SMB) surface mount package. This component is designed for general-purpose overvoltage protection applications with a 600W peak pulse power rating and 51V nominal voltage classification. The part is currently listed as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement.

Substiute Parts

P6SMBJ51C

Littelfuse Inc.In Stock: 830P6SMBJ51C Datasheet

Current PartRFQ

P6SMB51CA

Good-Ark SemiconductorIn Stock: 4990P6SMB51CA Datasheet

MFR RecommendedRFQ

SZP6SMB51AT3G

Littelfuse Inc.In Stock: 2732SZP6SMB51AT3G Datasheet

MFR RecommendedRFQ

SMBJP6KE51CA-TP

Micro Commercial CoIn Stock: 3886SMBJP6KE51CA-TP Datasheet

DirectRFQ

P6SMB51CA

Good-Ark SemiconductorIn Stock: 4990P6SMB51CA Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the P6SMBJ51C is determined by strict equivalence across the following critical parameters:

• Bidirectional TVS diode topology (1 channel)
• Voltage - Reverse Standoff: 43.6V (±tolerance)
• Voltage - Clamping (Max) @ Ipp: 70.1V maximum (within acceptable range)
• Current - Peak Pulse (10/1000µs): 8.6A to 8.7A
• Power - Peak Pulse: 600W
• Package / Case: DO-214AA, SMB (surface mount)
• Mounting Type: Surface Mount
• RoHS3 Compliance
• MSL Rating: 1 (Unlimited)

Three active substitute parts meet these criteria and are available in production quantities. All substitutes maintain the same electrical protection characteristics and package footprint, enabling direct replacement in existing designs.

Parameter Comparison

Engineering Selection Recommendations

All three substitute parts are active production components with ROHS3 compliance and MSL 1 ratings, meeting the environmental and regulatory requirements of the obsolete P6SMBJ51C.

P6SMB51CA (Good-Ark Semiconductor) is designated as MFR Recommended and offers the highest inventory availability (4942 pcs). This part maintains identical reverse standoff voltage and operating temperature range to the original specification.

SZP6SMB51AT3G (Littelfuse Inc.) provides extended lower operating temperature capability (-65°C minimum) and includes AEC-Q101 automotive qualification. This option is suitable for applications requiring automotive-grade reliability or extended cold-temperature operation.

SMBJP6KE51CA-TP (Micro Commercial Co) extends the upper operating temperature to 175°C and matches the original 8.7A peak pulse current specification. This option is appropriate for high-temperature environments.

All three substitutes are electrically equivalent within the specified parameter tolerances and share identical surface mount package geometry, enabling direct PCB footprint compatibility.

Frequently Asked Questions (FAQ)

Q: Can P6SMB51CA be used as a direct replacement for P6SMBJ51C?

A: Yes. Both parts maintain 43.6V reverse standoff voltage, 600W peak pulse power, and identical DO-214AA SMB package geometry. The clamping voltage difference (70.1V vs 73.61V) falls within acceptable substitution tolerance for general-purpose TVS applications.

Q: What is the difference between the three substitute parts?

A: All three maintain core electrical parameters (43.6V standoff, 600W power, 8.6-8.7A peak pulse). Differences include: P6SMB51CA offers standard temperature range and highest availability; SZP6SMB51AT3G includes automotive qualification and extended low-temperature rating; SMBJP6KE51CA-TP extends upper temperature to 175°C.

Q: Are all substitutes available in the same packaging format?

A: All three substitutes are supplied in Tape & Reel (TR) format. The original P6SMBJ51C packaging specification was not provided. Verify packaging requirements for your procurement process.

Q: Do the substitutes maintain RoHS3 compliance?

A: Yes. All three substitute parts are ROHS3 Compliant with MSL 1 (Unlimited) moisture sensitivity rating, matching the original part's environmental compliance.

Q: Which substitute should I select for automotive applications?

A: SZP6SMB51AT3G includes AEC-Q101 automotive qualification and is the appropriate choice for automotive-grade designs.

Q: Is there a performance difference in clamping voltage between substitutes?

A: All substitutes clamp at 70.1V maximum, compared to the original 73.61V. This represents improved clamping performance and is acceptable for general-purpose protection circuits.