P6SMBJ22C Equivalent & Substitute Parts

Part Overview

The P6SMBJ22C 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 22V nominal rating with 600W peak pulse power handling in a DO-214AA (SMB) package. The part is currently listed as obsolete, making equivalent substitutes necessary for ongoing production and maintenance applications.

Substiute Parts

P6SMBJ22C

Littelfuse Inc.In Stock: 798P6SMBJ22C Datasheet

Current PartRFQ

P6SMB22CA

Good-Ark SemiconductorIn Stock: 20143P6SMB22CA Datasheet

MFR RecommendedRFQ

SMBJP6KE22CA-TP

Micro Commercial CoIn Stock: 50367SMBJP6KE22CA-TP Datasheet

DirectRFQ

P6SMB22CA

Good-Ark SemiconductorIn Stock: 20143P6SMB22CA Datasheet

MFR RecommendedRFQ

SM6T22CA

STMicroelectronicsIn Stock: 9914SM6T22CA Datasheet

MFR RecommendedRFQ

SM6T22CA-E3/52

Vishay General Semiconductor - Diodes DivisionIn Stock: 30191SM6T22CA-E3/52 Datasheet

MFR RecommendedRFQ

SM6T22CAY

STMicroelectronicsIn Stock: 3342SM6T22CAY Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the P6SMBJ22C is determined by strict alignment of the following electrical and mechanical parameters:

Critical Substitution Parameters:

• Voltage - Reverse Standoff (Typ): 18.8V
• Voltage - Breakdown (Min): 20.9V (acceptable range for 22V class devices)
• Voltage - Clamping (Max) @ Ipp: 30.6V (acceptable range for 22V class devices)
• Power - Peak Pulse: 600W
• Package / Case: DO-214AA, SMB
• Mounting Type: Surface Mount
• Bidirectional Channels: 1
• Type: Zener

All substitute parts listed maintain these core electrical specifications within the acceptable tolerance band for 22V TVS diodes. Package compatibility (DO-214AA/SMB) and surface-mount configuration are preserved across all alternatives. Variations in peak pulse current (Ipp) and operating temperature ranges do not disqualify substitution when other parameters align.

Parameter Comparison

Engineering Selection Recommendations

All listed substitute parts are active products with current manufacturing status, addressing the obsolescence of the P6SMBJ22C. Selection among substitutes should be based on the following factors:

Availability and Lead Time: P6SMB22CA (Good-Ark Semiconductor) and SMBJP6KE22CA-TP (Micro Commercial Co) offer the highest inventory levels (20,100 and 50,300 units respectively), ensuring supply continuity.

Compliance and Certifications: All substitutes maintain ROHS3 compliance and MSL 1 rating. SM6T22CAY includes AEC-Q101 automotive qualification, suitable for applications requiring automotive-grade components.

Operating Temperature Range: SMBJP6KE22CA-TP extends the upper operating temperature to 175°C, providing additional thermal margin in high-temperature environments. SM6T22CA-E3/52 extends the lower operating temperature to -65°C for cold-environment applications.

Packaging Options: P6SMB22CA and SM6T22CA are available in Cut Tape (CT) & Digi-Reel® packaging. SMBJP6KE22CA-TP, SM6T22CA-E3/52, and SM6T22CAY are supplied in Tape & Reel (TR) format, optimized for automated assembly processes.

Frequently Asked Questions (FAQ)

Q: Can I directly replace P6SMBJ22C with any of these substitutes without circuit modification?

A: Yes. All substitute parts maintain the critical electrical parameters (18.8V reverse standoff, 30.6V clamping voltage, 600W peak pulse power) and identical DO-214AA/SMB package configuration. Direct PCB substitution is supported without design changes.

Q: What is the difference between the 10/1000µs and 8/20µs pulse specifications listed for different parts?

A: These represent different test pulse waveforms used to characterize peak pulse current. The 10/1000µs waveform is standard for TVS diodes in general-purpose applications. The 8/20µs waveform is used for surge testing. Both specifications indicate the same 600W power rating and are functionally equivalent for circuit protection.

Q: Why do some substitutes show 102A peak pulse current while others show approximately 20A?

A: The difference reflects the test pulse waveform used. Parts tested at 8/20µs (SM6T22CA, SM6T22CAY) show higher peak current values due to the waveform characteristics. Parts tested at 10/1000µs show lower values. Both groups meet the 600W power specification and are electrically equivalent for protection purposes.

Q: Is SM6T22CAY suitable for automotive applications?

A: Yes. SM6T22CAY carries AEC-Q101 automotive qualification and is specifically designed for automotive-grade applications. It maintains all electrical equivalence to the P6SMBJ22C while meeting automotive reliability standards.

Q: What packaging format should I specify for high-volume production?

A: For automated assembly, specify Tape & Reel (TR) packaging. SMBJP6KE22CA-TP, SM6T22CA-E3/52, and SM6T22CAY are available in TR format. For lower-volume or manual assembly, Cut Tape (CT) & Digi-Reel® options (P6SMB22CA, SM6T22CA) are suitable.

Q: Are there any temperature range limitations I should consider?

A: All substitutes operate within -55°C to 150°C minimum range, matching the original P6SMBJ22C. SMBJP6KE22CA-TP extends to 175°C and SM6T22CA-E3/52 extends to -65°C if your application requires these extended ranges.