P6SMBJ15 Equivalent & Substitute Parts

Part Overview

The P6SMBJ15 is a unidirectional transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection in surface-mount applications. This component features a 12.8V reverse standoff voltage, 22.26V maximum clamping voltage, and 600W peak pulse power rating in a DO-214AA (SMB) package. The part is currently listed as obsolete, making equivalent substitutes necessary for ongoing design support and procurement.

Substiute Parts

P6SMBJ15

Littelfuse Inc.In Stock: 1117P6SMBJ15 Datasheet

Current PartRFQ

SMBJP6KE15A-TP

Micro Commercial CoIn Stock: 1493SMBJP6KE15A-TP Datasheet

DirectRFQ

P6SMB15A

Eaton - Electronics DivisionIn Stock: 17984P6SMB15A Datasheet

MFR RecommendedRFQ

SM6T15A

STMicroelectronicsIn Stock: 21094SM6T15A Datasheet

MFR RecommendedRFQ

SM6T15A-E3/52

Vishay General Semiconductor - Diodes DivisionIn Stock: 30426SM6T15A-E3/52 Datasheet

MFR RecommendedRFQ

SM6T15A-E3/5B

Vishay General Semiconductor - Diodes DivisionIn Stock: 3852SM6T15A-E3/5B Datasheet

MFR RecommendedRFQ

SM6T15AY

STMicroelectronicsIn Stock: 1966SM6T15AY Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the P6SMBJ15 is determined by strict alignment of the following electrical and mechanical parameters:

Critical Matching Parameters:

• Reverse Standoff Voltage (Typ): 12.8V
• Unidirectional channel configuration: 1 channel
• Peak Pulse Power Rating: 600W
• Package / Case: DO-214AA (SMB)
• Mounting Type: Surface Mount
• Type: Zener diode

Acceptable Variation Parameters:

• Voltage - Clamping (Max) @ Ipp: Range 21.2V to 27.2V (within circuit protection requirements)
• Current - Peak Pulse (10/1000µs): 28A to 147A (higher values provide equivalent or superior performance)
• Operating Temperature Range: Minimum -55°C, maximum 150°C or higher
• Product Status: Active preferred; obsolete acceptable if other parameters match

All substitute parts listed maintain the 12.8V reverse standoff voltage and 600W power rating, ensuring functional equivalence in transient voltage suppression applications.

Parameter Comparison

Engineering Selection Recommendations

All listed substitute parts maintain active product status with ROHS3 compliance, providing long-term availability and regulatory alignment superior to the obsolete P6SMBJ15.

Primary Substitutes (Closest Electrical Match): SMBJP6KE15A-TP, P6SMB15A, SM6T15A-E3/52, and SM6T15A-E3/5B provide clamping voltages of 21.2V, closely matching the original 22.26V specification. These parts are suitable for direct replacement in applications where clamping voltage tolerance is critical.

Extended Temperature Range Options: SM6T15A-E3/52 and SM6T15A-E3/5B support operating temperatures down to -65°C, exceeding the original -55°C minimum. These options are appropriate for applications requiring enhanced low-temperature performance.

Higher Peak Pulse Current Options: SM6T15A and SM6T15AY deliver 147A peak pulse current (8/20µs), compared to the original 28.8A specification. These parts provide superior transient suppression capability while maintaining the 600W power rating and 12.8V standoff voltage.

Packaging Considerations: SMBJP6KE15A-TP and SM6T15A-E3/52 and SM6T15A-E3/5B are supplied in Tape & Reel (TR) format. P6SMB15A and SM6T15A are available in Cut Tape (CT) & Digi-Reel® format. All maintain DO-214AA (SMB) package compatibility for surface-mount assembly.

Frequently Asked Questions (FAQ)

Q: Can I use SM6T15A or SM6T15AY as a direct replacement for P6SMBJ15?

A: Yes. Both parts maintain the critical 12.8V reverse standoff voltage, 600W power rating, and DO-214AA (SMB) package. The higher peak pulse current (147A vs. 28.8A) provides equivalent or superior transient suppression performance. The clamping voltage difference (27.2V vs. 22.26V) remains within acceptable circuit protection parameters.

Q: What is the difference between the Vishay SM6T15A-E3/52 and SM6T15A-E3/5B variants?

A: Both parts are electrically identical with matching 12.8V standoff voltage, 21.2V clamping voltage, 28A peak pulse current, and 600W power rating. The suffix designations (E3/52 vs. E3/5B) indicate different packaging or tape configurations. Selection between these variants depends on procurement and assembly line requirements.

Q: Is the P6SMB15A from Eaton suitable for telecom applications?

A: The P6SMB15A is specified for telecom applications and maintains all critical electrical parameters matching the P6SMBJ15 (12.8V standoff, 21.2V clamping, 600W power). It is suitable for telecom circuit protection where the original part was used.

Q: Do all substitute parts meet RoHS compliance?

A: All listed substitute parts are ROHS3 compliant or RoHS compliant, meeting current environmental and regulatory requirements. The original P6SMBJ15 is ROHS3 compliant.

Q: Can I use SMBJP6KE15A-TP in applications requiring -65°C minimum operating temperature?

A: No. SMBJP6KE15A-TP supports -55°C minimum operating temperature. For applications requiring -65°C operation, use SM6T15A-E3/52 or SM6T15A-E3/5B from Vishay.

Q: What is the significance of the 147A (8/20µs) current specification for SM6T15A and SM6T15AY?

A: The 147A specification uses an 8/20µs pulse waveform, which differs from the standard 10/1000µs waveform used for other parts. This represents a faster transient pulse profile. Both specifications indicate the part's ability to suppress transient overvoltage events; the different waveforms reflect different test standards. Both parts maintain the 600W power rating and 12.8V standoff voltage required for P6SMBJ15 replacement.