P6SMB22A Equivalent & Substitute Parts

Part Overview

The P6SMB22A is an 18.8V Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose transient voltage protection in surface-mount applications. This unidirectional Zener diode features a 30.6V maximum clamping voltage and 19.9A peak pulse current rating in the DO-214AA (SMB) package. The part is Active status and RoHS3 compliant. Equivalent and substitute parts are identified based on matching electrical specifications, package compatibility, and operational parameters to support component sourcing flexibility and supply chain continuity.

Substiute Parts

P6SMB22A

Littelfuse Inc.In Stock: 3340P6SMB22A Datasheet

Current PartRFQ

TPSMB22A

Littelfuse Inc.In Stock: 6246TPSMB22A Datasheet

DirectRFQ

SM6T22A

STMicroelectronicsIn Stock: 17939SM6T22A Datasheet

DirectRFQ

SM6T22A-E3/52

Vishay General Semiconductor - Diodes DivisionIn Stock: 30164SM6T22A-E3/52 Datasheet

DirectRFQ

SMBJP6KE22A-TP

Micro Commercial CoIn Stock: 4166SMBJP6KE22A-TP Datasheet

DirectRFQ

P6SMB22A

Eaton - Electronics DivisionIn Stock: 3327P6SMB22A Datasheet

MFR RecommendedRFQ

SM6T22AY

STMicroelectronicsIn Stock: 1903SM6T22AY Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the P6SMB22A are qualified based on the following electrical and mechanical parameters:

• Voltage - Reverse Standoff (Typ): 18.8V
• Voltage - Breakdown (Min): 20.9V
• Voltage - Clamping (Max) @ Ipp: 30.6V
• Power - Peak Pulse: 600W
• Package / Case: DO-214AA, SMB
• Mounting Type: Surface Mount
• Type: Zener, Unidirectional (1 channel)

All identified substitutes maintain these core electrical specifications and package compatibility. Variations in peak pulse current rating (19.7A to 102A) and operating temperature ranges are noted but do not preclude substitution within the specified electrical envelope. Packaging format differences (Cut Tape vs. Tape & Reel) and manufacturer-specific qualifications (AEC-Q101 automotive grade) are documented for procurement and application-specific requirements.

Parameter Comparison

Engineering Selection Recommendations

All identified substitute parts maintain electrical equivalence within the specified parameters. Selection should be based on the following criteria:

Standard Industrial Applications: TPSMB22A (Littelfuse Inc.), SM6T22A-E3/52 (Vishay), or SMBJP6KE22A-TP (Micro Commercial Co) are suitable direct replacements with identical or superior electrical performance and RoHS3 compliance.

Automotive Applications: TPSMB22A and SM6T22AY are qualified to AEC-Q101 automotive standards and feature extended operating temperature ranges (-65°C to 175°C), making them appropriate for automotive-grade circuit protection requirements.

Extended Temperature Range Requirements: TPSMB22A (-65°C ~ 175°C) and SMBJP6KE22A-TP (-55°C ~ 175°C) provide expanded operating temperature specifications compared to the standard P6SMB22A (-55°C ~ 150°C).

Packaging Format: TPSMB22A, SM6T22A-E3/52, and SMBJP6KE22A-TP are supplied in Tape & Reel format; P6SMB22A, SM6T22A, and SM6T22AY are supplied in Cut Tape & Digi-Reel format. Procurement requirements should align with manufacturing assembly processes.

Peak Pulse Current Capability: SM6T22A and SM6T22AY feature 102A peak pulse current (8/20µs) compared to approximately 20A for other substitutes. This higher rating provides additional transient suppression margin in high-energy surge environments.

Frequently Asked Questions (FAQ)

Q: Can TPSMB22A replace P6SMB22A in all applications?

A: Yes. TPSMB22A maintains identical electrical specifications (18.8V standoff, 30.6V clamping, 19.9A peak pulse, 600W power rating) and package compatibility (DO-214AA SMB). The primary difference is packaging format (Tape & Reel vs. Cut Tape) and extended operating temperature range (-65°C ~ 175°C vs. -55°C ~ 150°C), which provides additional design margin.

Q: What is the difference between SM6T22A and SM6T22A-E3/52?

A: Both parts are manufactured by different suppliers (STMicroelectronics vs. Vishay) and maintain the same electrical specifications. SM6T22A-E3/52 is supplied by Vishay in Tape & Reel format with -65°C lower temperature limit, while SM6T22A is supplied by STMicroelectronics in Cut Tape format with -55°C lower temperature limit. Peak pulse current specifications differ slightly (102A vs. 102A, both 8/20µs).

Q: Are automotive-qualified parts required for this application?

A: Automotive qualification (AEC-Q101) is application-dependent. TPSMB22A and SM6T22AY carry AEC-Q101 qualification and are suitable for automotive circuit protection. Standard industrial parts (P6SMB22A, SM6T22A-E3/52, SMBJP6KE22A-TP) are appropriate for non-automotive applications. Consult application requirements and design specifications.

Q: Does peak pulse current rating affect substitution compatibility?

A: Peak pulse current variations (19.7A to 102A) do not preclude substitution provided the application transient energy remains within the 600W power rating envelope. Higher peak pulse ratings (102A for SM6T22A and SM6T22AY) provide additional suppression capability without compromising compatibility. Lower ratings remain suitable for standard transient protection applications.

Q: What packaging considerations apply to these substitutes?

A: All parts use DO-214AA (SMB) surface-mount package with identical footprint and land pattern. Packaging format differences (Cut Tape vs. Tape & Reel) affect procurement and assembly logistics but not electrical or mechanical compatibility. Verify supplier packaging availability against manufacturing requirements.

Q: Are all substitutes RoHS compliant?

A: All identified substitutes are RoHS3 compliant except the Eaton P6SMB22A variant, which carries standard RoHS compliance. Verify compliance requirements for your specific application and supply chain.