P6SMBJ550CA Equivalent & Substitute Parts

Part Overview

The P6SMBJ550CA is a bidirectional transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection in surface-mount applications. This component features a 495V reverse standoff voltage, 760V clamping voltage, and 600W peak pulse power rating in a DO-214AA (SMB) package. The part is currently classified as obsolete, necessitating identification of active equivalent alternatives that maintain electrical and mechanical compatibility for ongoing production and repair applications.

Substiute Parts

P6SMBJ550CA

Littelfuse Inc.In Stock: 1076P6SMBJ550CA Datasheet

Current PartRFQ

P6SMB550CA

Diotec SemiconductorIn Stock: 1766P6SMB550CA Datasheet

MFR RecommendedRFQ

SMBJP6KE550CA-TP

Micro Commercial CoIn Stock: 25594SMBJP6KE550CA-TP Datasheet

DirectRFQ

P6SMB550CA

Diotec SemiconductorIn Stock: 1766P6SMB550CA Datasheet

MFR RecommendedRFQ

SMBJ495CA

Bourns Inc.In Stock: 4146SMBJ495CA Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the P6SMBJ550CA is determined by strict equivalence across the following critical parameters:

• Voltage - Reverse Standoff (Typ): 495V
• Voltage - Clamping (Max) @ Ipp: 760V
• Current - Peak Pulse (10/1000µs): 800mA or higher
• Power - Peak Pulse: 600W
• Package / Case: DO-214AA, SMB
• Mounting Type: Surface Mount
• Type: Zener, Bidirectional

All identified substitute parts maintain these electrical specifications within the defined tolerances and share identical mechanical packaging, ensuring direct functional replacement without circuit redesign.

Parameter Comparison

Engineering Selection Recommendations

For applications requiring replacement of the obsolete P6SMBJ550CA, the following active alternatives are available:

SMBJP6KE550CA-TP (Micro Commercial Co) offers the closest electrical match with identical 800mA peak pulse current and extended operating temperature range to 175°C. This part is ROHS3 compliant and available in Tape & Reel packaging with high inventory levels (25,490 pcs).

SMBJ495CA (Bourns Inc.) provides equivalent electrical performance with 800mA peak pulse current and ROHS3 compliance. This part is available in Tape & Reel packaging with active product status and 4,100 pcs in stock.

P6SMB550CA (Diotec Semiconductor) maintains all critical voltage and power specifications with a marginal reduction in peak pulse current to 790mA. This part is active and available with 1,720 pcs in stock. The operating temperature minimum is -50°C compared to -55°C for other alternatives.

Selection should prioritize parts with active product status and compliance certifications matching the application requirements.

Frequently Asked Questions (FAQ)

Q: Can P6SMB550CA (Diotec) be used as a direct replacement for P6SMBJ550CA?

A: Yes. P6SMB550CA maintains the critical voltage specifications (495V standoff, 760V clamping) and power rating (600W). The peak pulse current is 790mA versus 800mA in the original part. The operating temperature minimum is -50°C versus -55°C. These differences are within acceptable substitution parameters for general-purpose TVS applications.

Q: What is the difference between SMBJP6KE550CA-TP and SMBJ495CA?

A: Both parts meet the electrical requirements of the original P6SMBJ550CA with 495V standoff voltage, 760V clamping voltage, and 800mA peak pulse current. SMBJP6KE550CA-TP offers an extended upper operating temperature of 175°C versus 150°C for SMBJ495CA. SMBJP6KE550CA-TP is supplied in Tape & Reel packaging; SMBJ495CA is also available in Tape & Reel format.

Q: Are all substitute parts in the same DO-214AA (SMB) package?

A: Yes. All identified substitute parts use the DO-214AA (SMB) surface-mount package, ensuring mechanical compatibility with existing PCB layouts and assembly processes.

Q: Which substitute part has the best availability?

A: SMBJP6KE550CA-TP (Micro Commercial Co) has the highest inventory level at 25,490 pcs, followed by P6SMB550CA (Diotec) at 1,720 pcs and SMBJ495CA (Bourns) at 4,100 pcs.

Q: Do all substitute parts meet RoHS compliance?

A: SMBJP6KE550CA-TP and SMBJ495CA are ROHS3 compliant. P6SMB550CA has RoHS status listed as not applicable. Verify compliance requirements for your specific application before selection.