P6SMB200AT3G Equivalent & Substitute Parts

Part Overview

The P6SMB200AT3G is a transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection applications. This unidirectional zener diode operates with a reverse standoff voltage of 171V and provides clamping at 274V maximum, with a peak pulse current rating of 2.2A. The part is classified as obsolete, necessitating identification of active equivalent alternatives that maintain electrical and mechanical compatibility for continued system support and new designs.

Substiute Parts

P6SMB200AT3G

Littelfuse Inc.In Stock: 5757P6SMB200AT3G Datasheet

Current PartRFQ

P6SMB200A

MeritekIn Stock: 38919P6SMB200A Datasheet

DirectRFQ

P6SMB200A

MeritekIn Stock: 38919P6SMB200A Datasheet

DirectRFQ

P6SMB200AHE3_A/H

Vishay General Semiconductor - Diodes DivisionIn Stock: 8193P6SMB200AHE3_A/H Datasheet

MFR RecommendedRFQ

SM6T200A

STMicroelectronicsIn Stock: 74879SM6T200A Datasheet

MFR RecommendedRFQ

SM6T200A-M3/52

Vishay General Semiconductor - Diodes DivisionIn Stock: 932SM6T200A-M3/52 Datasheet

MFR RecommendedRFQ

SM6T200A-M3/5B

Vishay General Semiconductor - Diodes DivisionIn Stock: 836SM6T200A-M3/5B Datasheet

MFR RecommendedRFQ

SMBJP6KE200A-TP

Micro Commercial CoIn Stock: 2371SMBJP6KE200A-TP Datasheet

MFR RecommendedRFQ

TVP06B201A-G

Comchip TechnologyIn Stock: 741TVP06B201A-G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the P6SMB200AT3G is determined by strict alignment of the following electrical and mechanical parameters:

Critical Matching Parameters:

• Voltage - Reverse Standoff (Typ): 171V
• Voltage - Breakdown (Min): 190V
• Voltage - Clamping (Max) @ Ipp: 274V (or higher acceptable for protection margin)
• Current - Peak Pulse (10/1000µs): 2.2A (or higher acceptable for margin)
• Power - Peak Pulse: 600W
• Package / Case: DO-214AA, SMB
• Mounting Type: Surface Mount
• Type: Zener, Unidirectional

Compliance Requirements:

• RoHS3 Compliant
• MSL: 1 (Unlimited)
• REACH Unaffected
• ECCN: EAR99

Substitute parts are grouped into two categories: direct electrical equivalents with identical clamping voltage (274V) and active-status alternatives with enhanced current handling (11.3A) that provide superior transient suppression while maintaining voltage compatibility.

Parameter Comparison

Engineering Selection Recommendations

Direct Electrical Equivalents (Identical 274V Clamping):

P6SMB200A (Meritek), SM6T200A-M3/52 (Vishay), SM6T200A-M3/5B (Vishay), SMBJP6KE200A-TP (Micro Commercial Co), and TVP06B201A-G (Comchip) provide direct substitution with matching voltage clamping at 274V and equivalent current ratings of 2.19A to 2.2A. All are active-status products with ROHS3 compliance and MSL 1 rating. Selection among these options is determined by supply chain availability and procurement lead times.

Enhanced Performance Alternative:

SM6T200A (STMicroelectronics) offers superior transient suppression capability with 11.3A peak pulse current (8/20µs pulse definition) while maintaining the same 171V reverse standoff and 190V breakdown voltages. The higher clamping voltage of 353V provides additional protection margin. This part is active-status and suitable for applications requiring enhanced surge handling capacity.

Temperature Range Consideration:

SMBJP6KE200A-TP (Micro Commercial Co) extends the upper operating temperature to 175°C, compared to 150°C for most alternatives. This part is appropriate for high-temperature environments.

Obsolete Part Alternatives:

P6SMB200AHE3_A/H (Vishay) is also classified as obsolete and should not be selected for new designs, despite matching electrical specifications.

Frequently Asked Questions (FAQ)

Q: Can SM6T200A (11.3A) be used as a direct replacement for P6SMB200AT3G (2.2A)?

A: Yes. SM6T200A maintains the same reverse standoff voltage (171V) and breakdown voltage (190V). The higher peak pulse current (11.3A vs 2.2A) and clamping voltage (353V vs 274V) provide enhanced protection margin and are electrically compatible. The higher current rating does not create incompatibility; it represents improved transient suppression capability.

Q: Are all substitute parts in the same package?

A: Yes. All substitute parts use the DO-214AA (SMB) surface mount package, ensuring mechanical and footprint compatibility with the original P6SMB200AT3G design.

Q: What is the difference between the Vishay SM6T200A-M3/52 and SM6T200A-M3/5B variants?

A: Both parts are electrically identical with matching voltage and current specifications. The difference lies in packaging configuration (tape reel variant codes). Selection is based on procurement and assembly process requirements.

Q: Why is P6SMB200AHE3_A/H listed if it is obsolete?

A: P6SMB200AHE3_A/H is included for reference and historical traceability. It should not be selected for new designs. Active-status alternatives must be prioritized.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts meet ROHS3 compliance, REACH unaffected status, and MSL 1 (unlimited) moisture sensitivity requirements, matching the original part's environmental certifications.

Q: What is the significance of the different pulse definitions (10/1000µs vs 8/20µs)?

A: The pulse definition describes the transient waveform used for testing. SM6T200A uses the 8/20µs standard pulse definition, which is a more aggressive transient profile. The 11.3A rating under this definition indicates robust performance under demanding surge conditions while maintaining compatibility with the 10/1000µs specification of the original part.