P6SMB24A-M3/5B Equivalent & Substitute Parts

Part Overview

The P6SMB24A-M3/5B is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This surface mount component operates in the 20.5V reverse standoff voltage class and is designed for general-purpose transient protection applications. The part is Active status and RoHS3 compliant. Equivalent and substitute parts are identified when component availability is limited, supply chain disruptions occur, or design flexibility is required while maintaining electrical and mechanical compatibility.

Substiute Parts

P6SMB24A-M3/5B

Vishay General Semiconductor - Diodes DivisionIn Stock: 810P6SMB24A-M3/5B Datasheet

Current PartRFQ

P6SMB24A

Eaton - Electronics DivisionIn Stock: 2059P6SMB24A Datasheet

MFR RecommendedRFQ

P6SMB24A

Eaton - Electronics DivisionIn Stock: 2059P6SMB24A Datasheet

MFR RecommendedRFQ

SM6T24A

STMicroelectronicsIn Stock: 2942SM6T24A Datasheet

MFR RecommendedRFQ

SM6T24AY

STMicroelectronicsIn Stock: 2639SM6T24AY Datasheet

MFR RecommendedRFQ

SMBJP6KE24A-TP

Micro Commercial CoIn Stock: 2931SMBJP6KE24A-TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the P6SMB24A-M3/5B are qualified based on the following critical parameters that determine functional interchangeability:

Primary Substitution Criteria:

• Voltage - Reverse Standoff (Typ): 20.5V
• Voltage - Breakdown (Min): 22.8V
• Package / Case: DO-214AA, SMB (surface mount)
• Mounting Type: Surface Mount
• Unidirectional Channels: 1
• Type: Zener

Secondary Compatibility Parameters:

• Voltage - Clamping (Max) @ Ipp: 33.2V or higher
• Current - Peak Pulse (10/1000µs): 18.1A or higher
• Power - Peak Pulse: 600W
• Operating Temperature Range: Must support application requirements
• RoHS Compliance: ROHS3 or equivalent

Substitute parts are grouped into two categories based on clamping voltage characteristics:

Group A (Matched Clamping Voltage): Parts with 33.2V clamping voltage provide direct electrical equivalence with identical transient suppression characteristics.

Group B (Higher Clamping Voltage): Parts with 42.8V clamping voltage provide enhanced transient suppression margin and are suitable for applications tolerating higher clamping voltages.

Parameter Comparison

Engineering Selection Recommendations

Direct Equivalents (Group A - Matched Clamping Voltage):

The P6SMB24A (Eaton) and SMBJP6KE24A-TP (Micro Commercial Co) are direct electrical equivalents to the P6SMB24A-M3/5B. Both parts maintain the 33.2V clamping voltage specification and are suitable for one-to-one replacement in existing designs. The Eaton part offers a wider operating temperature range (-55°C to 150°C) compared to the original Vishay specification (-65°C to 150°C), which may require thermal analysis for applications operating below -55°C. The Micro Commercial Co part extends the upper operating temperature to 175°C, providing additional thermal margin for high-temperature applications.

Enhanced Performance Alternatives (Group B - Higher Clamping Voltage):

The SM6T24A and SM6T24AY (both STMicroelectronics) provide higher clamping voltage (42.8V) with significantly increased peak pulse current capability (93A at 8/20µs). These parts are suitable for applications requiring enhanced transient suppression margin or higher energy absorption capacity. The SM6T24AY variant includes AEC-Q101 automotive qualification, making it appropriate for automotive and harsh environment applications. Selection of Group B parts requires circuit analysis to confirm that the higher clamping voltage is compatible with downstream component ratings.

Compliance Considerations:

All substitute parts maintain RoHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, ensuring compatibility with standard manufacturing and storage practices. The original Vishay part and STMicroelectronics parts carry REACH Unaffected status, while Eaton and Micro Commercial Co parts carry RoHS Compliant designation. All parts are classified under ECCN EAR99 and HTSUS 8541.10.0080.

Frequently Asked Questions (FAQ)

Q: Can I use the SM6T24A or SM6T24AY as a direct replacement for the P6SMB24A-M3/5B?

A: The STMicroelectronics parts (SM6T24A and SM6T24AY) share the same reverse standoff voltage (20.5V), breakdown voltage (22.8V), and package (DO-214AA SMB), but feature a higher clamping voltage of 42.8V compared to the original 33.2V. This higher clamping voltage may exceed the voltage tolerance of downstream components in your circuit. Use these parts only if circuit analysis confirms compatibility with the higher clamping voltage specification.

Q: What is the difference between P6SMB24A (Eaton) and SMBJP6KE24A-TP (Micro Commercial Co)?

A: Both parts are electrically equivalent with matching 33.2V clamping voltage and 18.4A peak pulse current. The primary differences are operating temperature range (Eaton: -55°C to 150°C; Micro Commercial Co: -55°C to 175°C) and packaging format (Eaton: Tape & Reel; Micro Commercial Co: Tape & Reel). Select based on your application's thermal requirements and packaging preferences.

Q: Are all substitute parts available 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 P6SMB24A-M3/5B design. No PCB layout modifications are required.

Q: Which substitute part should I select for automotive applications?

A: The SM6T24AY (STMicroelectronics) is qualified to AEC-Q101 automotive standards and is the appropriate choice for automotive and mission-critical applications. This part provides enhanced transient suppression with 42.8V clamping voltage and 93A peak pulse current capability.

Q: Do all substitute parts meet RoHS compliance requirements?

A: Yes. All substitute parts are RoHS3 compliant or carry equivalent RoHS Compliant designation, meeting environmental and regulatory requirements for commercial and industrial applications.

Q: What is the impact of the lower operating temperature minimum (-55°C vs. -65°C) in the Eaton and Micro Commercial Co parts?

A: The Eaton P6SMB24A and Micro Commercial Co SMBJP6KE24A-TP specify a minimum operating temperature of -55°C, compared to the original Vishay part at -65°C. If your application requires operation below -55°C, the original Vishay part or equivalent parts with -65°C minimum rating must be used. For applications operating at -55°C or above, these substitute parts are fully compatible.