P6SMBJ24 Equivalent & Substitute Parts

Part Overview

The P6SMBJ24 is a unidirectional transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection in surface-mount applications. This component features a 20.5V reverse standoff voltage, 34.86V maximum clamping voltage, and 600W peak pulse power rating in a DO-214AA (SMB) package.

The P6SMBJ24 is classified as obsolete. Equivalent and substitute parts are available from active manufacturers including Micro Commercial Co, Eaton Electronics Division, STMicroelectronics, and Vishay General Semiconductor, offering direct functional replacements with maintained electrical performance and enhanced availability.

Substiute Parts

P6SMBJ24

Littelfuse Inc.In Stock: 955P6SMBJ24 Datasheet

Current PartRFQ

SMBJP6KE24A-TP

Micro Commercial CoIn Stock: 2931SMBJP6KE24A-TP Datasheet

DirectRFQ

P6SMB24A

Eaton - Electronics DivisionIn Stock: 2059P6SMB24A Datasheet

MFR RecommendedRFQ

SM6T24A

STMicroelectronicsIn Stock: 2942SM6T24A Datasheet

MFR RecommendedRFQ

SM6T24A-E3/52

Vishay General Semiconductor - Diodes DivisionIn Stock: 30220SM6T24A-E3/52 Datasheet

MFR RecommendedRFQ

SM6T24AY

STMicroelectronicsIn Stock: 2639SM6T24AY Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the P6SMBJ24 is determined by the following critical electrical and mechanical parameters:

• Reverse Standoff Voltage (Typ): 20.5V — all substitute parts maintain this specification
• Package / Case: DO-214AA (SMB) — all substitute parts use identical surface-mount package
• Unidirectional Channels: 1 — all substitute parts are single-channel devices
• Power - Peak Pulse: 600W — all substitute parts maintain this power rating
• Mounting Type: Surface Mount — all substitute parts are surface-mount compatible
• RoHS Compliance: All substitute parts meet ROHS3 or equivalent compliance

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

Group A (Lower Clamping Voltage): SMBJP6KE24A-TP, P6SMB24A, and SM6T24A-E3/52 feature 33.2V maximum clamping voltage, representing a tighter clamping specification than the original part.

Group B (Higher Clamping Voltage): SM6T24A and SM6T24AY feature 42.8V maximum clamping voltage, representing a higher clamping specification than the original part.

All substitute parts maintain the 20.5V reverse standoff voltage and 600W power rating, ensuring functional compatibility within the specified electrical operating window.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Matched Clamping Voltage)

SMBJP6KE24A-TP, P6SMB24A, and SM6T24A-E3/52 are recommended for applications requiring clamping voltage specifications aligned with the original P6SMBJ24 design envelope. These parts feature 33.2V maximum clamping voltage and maintain the 20.5V reverse standoff voltage. All three are active products with ROHS3 compliance and full availability. P6SMB24A is manufactured by Eaton Electronics Division and is designated as MFR Recommended. SM6T24A-E3/52 is manufactured by Vishay General Semiconductor with extended temperature range (-65 to 150°C) and highest inventory availability (30,200 units).

For Higher Transient Energy Absorption

SM6T24A and SM6T24AY are recommended for applications where higher clamping voltage tolerance (42.8V) and increased peak pulse current (93A at 8/20µs) are acceptable. Both parts are active products with ROHS3 compliance. SM6T24AY includes automotive-grade qualification (AEC-Q101) and is suitable for automotive and harsh-environment applications.

Compliance and Availability Considerations

All substitute parts meet ROHS3 compliance or equivalent standards. SMBJP6KE24A-TP offers the widest operating temperature range (-55 to 175°C). SM6T24A-E3/52 provides the highest inventory availability. SM6T24AY provides automotive-grade qualification for regulated applications.

Frequently Asked Questions (FAQ)

Q: Can I use SM6T24A or SM6T24AY as direct replacements for P6SMBJ24?

A: SM6T24A and SM6T24AY feature 42.8V maximum clamping voltage compared to the P6SMBJ24's 34.86V. Both maintain the 20.5V reverse standoff voltage and 600W power rating. These parts are functionally compatible if the application circuit tolerates higher clamping voltage. The higher clamping voltage may result in increased transient voltage at the protected circuit node.

Q: What is the difference between Group A and Group B substitute parts?

A: Group A parts (SMBJP6KE24A-TP, P6SMB24A, SM6T24A-E3/52) feature 33.2V maximum clamping voltage, closer to the original specification. Group B parts (SM6T24A, SM6T24AY) feature 42.8V maximum clamping voltage with higher peak pulse current capability (93A). Selection depends on circuit protection requirements and transient energy levels.

Q: Are all substitute parts available in the same package?

A: Yes. All substitute parts use the DO-214AA (SMB) surface-mount package, ensuring identical PCB footprint and mounting compatibility. Packaging formats differ (Tape & Reel, Cut Tape, Digi-Reel®) but do not affect electrical performance or mechanical fit.

Q: Which substitute part has the best availability?

A: SM6T24A-E3/52 (Vishay General Semiconductor) has the highest inventory availability at 30,200 units. SMBJP6KE24A-TP (Micro Commercial Co) has 2,829 units available. P6SMB24A (Eaton Electronics Division) has 2,003 units available.

Q: Is SM6T24AY suitable for automotive applications?

A: Yes. SM6T24AY is qualified to AEC-Q101 automotive standards and carries automotive-grade designation. This part is suitable for automotive and regulated harsh-environment applications requiring formal qualification compliance.

Q: What is the temperature operating range difference between substitute parts?

A: SMBJP6KE24A-TP operates from -55 to 175°C, the widest range. SM6T24A-E3/52 operates from -65 to 150°C, offering the lowest minimum temperature. All other parts operate from -55 to 150°C, matching the original P6SMBJ24 specification.