P6SMB22A-M3/5B Equivalent & Substitute Parts

Part Overview

The P6SMB22A-M3/5B is a transient voltage suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This unidirectional zener diode is designed for general-purpose transient voltage suppression in surface mount applications using the DO-214AA (SMB) package. The part is active and in production, with 1039 units currently in stock. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to availability constraints, supply chain considerations, or design flexibility needs.

Substiute Parts

P6SMB22A-M3/5B

Vishay General Semiconductor - Diodes DivisionIn Stock: 1052P6SMB22A-M3/5B Datasheet

Current PartRFQ

P6SMB22A

Eaton - Electronics DivisionIn Stock: 3327P6SMB22A Datasheet

MFR RecommendedRFQ

P6SMB22A

Eaton - Electronics DivisionIn Stock: 3327P6SMB22A Datasheet

MFR RecommendedRFQ

SM6T22A

STMicroelectronicsIn Stock: 17939SM6T22A Datasheet

MFR RecommendedRFQ

SM6T22AY

STMicroelectronicsIn Stock: 1903SM6T22AY Datasheet

MFR RecommendedRFQ

SMBJP6KE22A-TP

Micro Commercial CoIn Stock: 4166SMBJP6KE22A-TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the P6SMB22A-M3/5B are qualified based on the following critical 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
• RoHS Status: ROHS3 Compliant or RoHS Compliant
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

All identified substitute parts maintain these core electrical and mechanical specifications, ensuring functional equivalence in circuit protection applications. Variations in peak pulse current measurement standards (10/1000µs versus 8/20µs) and operating temperature ranges are noted but do not preclude substitution when the primary voltage and power ratings are matched.

Parameter Comparison

Engineering Selection Recommendations

All identified substitute parts maintain active product status and comply with RoHS requirements, ensuring regulatory compliance and long-term availability. The P6SMB22A from Eaton and SMBJP6KE22A-TP from Micro Commercial Co provide the closest electrical equivalence to the original P6SMB22A-M3/5B, with peak pulse current ratings within 0.3A of the reference part when measured under identical 10/1000µs pulse conditions.

The SM6T22A and SM6T22AY from STMicroelectronics employ a different peak pulse current measurement standard (8/20µs), resulting in significantly higher reported current values (102A). These parts maintain identical voltage specifications and power ratings, making them functionally equivalent for transient suppression applications. The SM6T22AY variant includes AEC-Q101 automotive qualification, suitable for applications requiring automotive-grade components.

Selection should prioritize parts with matching operating temperature ranges when thermal performance is critical. The SMBJP6KE22A-TP offers the widest operating temperature range (-55°C to 175°C), providing additional thermal margin in high-temperature environments.

Frequently Asked Questions (FAQ)

Q: Can I substitute the P6SMB22A-M3/5B with any of these parts without circuit redesign?

A: Yes. All substitute parts maintain identical voltage specifications (18.8V standoff, 20.9V breakdown, 30.6V clamping) and 600W peak pulse power rating. The DO-214AA (SMB) package is mechanically identical across all parts, enabling direct PCB footprint compatibility.

Q: What is the significance of the different peak pulse current measurements (10/1000µs versus 8/20µs)?

A: These represent different pulse waveform standards used by manufacturers for characterization. The 10/1000µs standard (Vishay, Eaton, Micro Commercial Co) and 8/20µs standard (STMicroelectronics) measure the same transient suppression capability under different test conditions. Both measurement methods are valid for TVS diode characterization. The higher current values reported for 8/20µs measurements reflect the shorter pulse duration, not superior performance.

Q: Does the operating temperature range difference affect substitution?

A: The P6SMB22A-M3/5B operates from -65°C to 150°C, while most substitutes operate from -55°C to 150°C. If your application requires operation below -55°C, the original Vishay part is required. For standard industrial and commercial applications within -55°C to 150°C, all substitutes are suitable.

Q: Is the SM6T22AY automotive-qualified variant suitable for non-automotive applications?

A: Yes. AEC-Q101 qualification indicates automotive-grade reliability and testing. Parts meeting automotive standards exceed standard industrial requirements and are fully compatible with general-purpose applications.

Q: Are there packaging differences between these parts?

A: The original P6SMB22A-M3/5B uses Tape & Box (TB) packaging. Substitutes use Cut Tape (CT) & Digi-Reel® or Tape & Reel (TR) packaging. All packaging formats are suitable for automated assembly. Verify packaging compatibility with your procurement and assembly processes.

Q: What compliance certifications apply to all substitute parts?

A: All parts are ROHS3 Compliant or RoHS Compliant and carry MSL 1 (Unlimited) moisture sensitivity ratings, indicating no special moisture handling requirements. All parts carry EAR99 export classification and HTSUS code 8541.10.0080.