P6SMB56CAT3 Equivalent & Substitute Parts

Part Overview

The P6SMB56CAT3 is a 77V clamp transient voltage suppressor (TVS) diode in SMB surface mount packaging manufactured by onsemi. This component is designed for transient overvoltage protection in electronic circuits with a peak pulse current rating of 7.8A and 600W peak pulse power dissipation. The part is currently obsolete, making equivalent and substitute parts necessary for ongoing design support and production requirements.

Substiute Parts

P6SMB56CAT3

onsemiIn Stock: 1141P6SMB56CAT3 Datasheet

Current PartRFQ

P6SMB56CA

Eaton - Electronics DivisionIn Stock: 2047P6SMB56CA Datasheet

DirectRFQ

P6SMB56CA

Eaton - Electronics DivisionIn Stock: 2047P6SMB56CA Datasheet

DirectRFQ

1KSMB56CA

Taiwan Semiconductor CorporationIn Stock: 154231KSMB56CA Datasheet

SimilarRFQ

SMBJ48CA-TR

STMicroelectronicsIn Stock: 3537SMBJ48CA-TR Datasheet

SimilarRFQ

SMBJP6KE56CA-TP

Micro Commercial CoIn Stock: 913SMBJP6KE56CA-TP Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the P6SMB56CAT3 is determined by the following critical parameters:

• Voltage - Reverse Standoff: 47.8V (±tolerance)
• Voltage - Clamping (Max) @ Ipp: 77V (±tolerance)
• Current - Peak Pulse (10/1000µs): minimum 7.8A
• Package / Case: DO-214AA, SMB (surface mount)
• Mounting Type: Surface Mount
• Type: Zener, Bidirectional (1 channel)

Parts meeting these electrical and mechanical specifications are classified as direct or similar substitutes. Direct substitutes maintain identical electrical characteristics. Similar substitutes may have enhanced performance specifications (higher current ratings or extended temperature ranges) while maintaining compatibility with the original application requirements.

Parameter Comparison

Engineering Selection Recommendations

Direct Substitutes (Preferred):

P6SMB56CA (Eaton - Electronics Division) is the primary direct substitute. It maintains identical voltage specifications (47.8V standoff, 77V clamping) and equivalent current rating (7.9A vs. 7.8A). The part is in active production status with RoHS compliance, addressing the obsolescence of the original component. Operating temperature range is -55°C to 150°C, which covers most industrial applications, though the original part extends to -65°C minimum.

SMBJP6KE56CA-TP (Micro Commercial Co) is a secondary direct substitute with identical voltage and current specifications (7.9A). This part offers extended operating temperature range (-55°C to 175°C) and ROHS3 compliance. It is suitable for applications requiring higher temperature performance.

Similar Substitutes (Enhanced Performance):

1KSMB56CA (Taiwan Semiconductor Corporation) maintains voltage compatibility (47.8V standoff, 77V clamping) but provides enhanced current handling (13A vs. 7.8A) and power dissipation (1000W vs. 600W). This part is suitable for applications where higher transient current protection is beneficial. Extended temperature range (-55°C to 175°C) and ROHS3 compliance are provided.

SMBJ48CA-TR (STMicroelectronics) has marginally higher standoff voltage (48V vs. 47.8V) and clamping voltage (77.4V vs. 77V), with equivalent current rating (8.1A). This part is suitable for circuits with slightly higher voltage thresholds and offers ROHS3 compliance.

Frequently Asked Questions (FAQ)

Q: Can I use 1KSMB56CA as a direct replacement for P6SMB56CAT3?

A: Yes. The 1KSMB56CA meets all critical electrical parameters: 47.8V reverse standoff, 77V clamping voltage, and exceeds the minimum current requirement (13A vs. 7.8A). The enhanced current and power ratings provide additional margin without compromising circuit compatibility. Both parts use identical DO-214AA (SMB) packaging.

Q: What is the difference between P6SMB56CA and SMBJP6KE56CA-TP?

A: Both parts are direct substitutes with identical voltage specifications (47.8V standoff, 77V clamping) and equivalent current ratings (7.9A). The primary difference is operating temperature range: P6SMB56CA operates -55°C to 150°C, while SMBJP6KE56CA-TP extends to 175°C. Select SMBJP6KE56CA-TP for high-temperature applications.

Q: Is SMBJ48CA-TR compatible with circuits designed for P6SMB56CAT3?

A: Yes, with minor voltage margin differences. SMBJ48CA-TR has 48V reverse standoff (vs. 47.8V) and 77.4V clamping (vs. 77V). These differences are within typical circuit tolerance for transient suppression. The part is suitable for applications where slightly higher voltage thresholds are acceptable.

Q: Why should I choose an active product over the obsolete P6SMB56CAT3?

A: Active products ensure long-term availability, consistent manufacturing quality, and compliance with current industry standards (RoHS3). Obsolete parts face supply discontinuation and may have degraded inventory quality. All recommended substitutes are in active production status.

Q: Does package compatibility matter when selecting a substitute?

A: Yes. All recommended substitutes use DO-214AA (SMB) surface mount packaging, which is mechanically and electrically compatible with the original P6SMB56CAT3. Verify PCB footprint compatibility before final selection, as SMB packages have standardized dimensions.

Q: What is the significance of RoHS compliance for this component?

A: RoHS compliance indicates the part meets environmental and material restrictions for lead and hazardous substances. All active substitutes (P6SMB56CA, 1KSMB56CA, SMBJ48CA-TR, SMBJP6KE56CA-TP) are RoHS compliant, while the original P6SMB56CAT3 is non-compliant. RoHS compliance is required for many industrial and consumer applications.