TPSMB24A Equivalent & Substitute Parts

Part Overview

The TPSMB24A is a unidirectional Zener transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for surface mount applications in the DO-214AA (SMB) package. This component provides transient overvoltage protection with a 20.5V reverse standoff voltage and 33.2V maximum clamping voltage at peak pulse current. The part is Active status and AEC-Q101 qualified for automotive applications. Equivalent and substitute parts are identified when design requirements necessitate alternative sourcing, inventory availability, or specific manufacturer preferences while maintaining electrical and mechanical compatibility.

Substiute Parts

TPSMB24A

Littelfuse Inc.In Stock: 9464TPSMB24A Datasheet

Current PartRFQ

P6SMB24A

Eaton - Electronics DivisionIn Stock: 2059P6SMB24A Datasheet

MFR RecommendedRFQ

SM6T24AY

STMicroelectronicsIn Stock: 2639SM6T24AY Datasheet

DirectRFQ

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

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the TPSMB24A are grouped based on strict electrical and mechanical compatibility criteria:

Group 1: Full Electrical & Mechanical Equivalents Parts that match all critical parameters: 20.5V reverse standoff voltage, 22.8V minimum breakdown voltage, 33.2V maximum clamping voltage, 18.4A peak pulse current (10/1000µs), 600W peak pulse power, DO-214AA/SMB package, and surface mount configuration.

• SMBJP6KE24A-TP (Micro Commercial Co)
• P6SMB24A (Eaton - Electronics Division)

Group 2: Electrical Equivalents with Parameter Variance Parts that maintain the same reverse standoff voltage (20.5V) and breakdown voltage (22.8V) but differ in clamping voltage and peak pulse current specifications due to different transient response characteristics.

• SM6T24AY (STMicroelectronics)
• SM6T24A (STMicroelectronics)

The key parameters determining substitution eligibility are: reverse standoff voltage, breakdown voltage, package type (DO-214AA/SMB), mounting configuration (surface mount), and unidirectional channel count (1). Clamping voltage and peak pulse current variations indicate different transient suppression profiles suitable for specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Identical Electrical Performance): SMBJP6KE24A-TP and P6SMB24A are direct substitutes with matching electrical specifications (33.2V clamping, 18.4A peak pulse current). Both are Active status components. SMBJP6KE24A-TP supports the extended temperature range (-55 to 175°C) matching the TPSMB24A. P6SMB24A operates within -55 to 150°C. Both are RoHS compliant; SMBJP6KE24A-TP carries ROHS3 compliance matching the original part.

For Automotive Applications: The TPSMB24A and SM6T24AY both carry AEC-Q101 qualification, suitable for automotive-grade requirements. SM6T24AY provides higher transient current handling (93A at 8/20µs pulse) with increased clamping voltage (42.8V), appropriate for applications requiring enhanced surge protection.

For General Purpose Applications: P6SMB24A (Telecom applications) and SM6T24A (General Purpose) are suitable alternatives where automotive qualification is not required. Both maintain the 20.5V standoff and 22.8V breakdown specifications.

Compliance Considerations: All substitute parts are ROHS compliant. TPSMB24A, SMBJP6KE24A-TP, SM6T24AY, and SM6T24A carry ROHS3 compliance. All parts are classified under ECCN EAR99 and HTSUS 8541.10.0080.

Frequently Asked Questions (FAQ)

Q: Can SM6T24AY or SM6T24A be used as direct replacements for TPSMB24A? A: These parts share the same reverse standoff voltage (20.5V) and breakdown voltage (22.8V), but differ in clamping voltage (42.8V vs. 33.2V) and peak pulse current (93A vs. 18.4A at different pulse widths). They are electrically compatible for the same voltage protection threshold but provide different transient response characteristics. Application-specific circuit analysis is required to confirm suitability.

Q: What is the difference between the packaging designations DO-214AA and SMB? A: DO-214AA is the standardized package outline designation, while SMB (Surface Mount Body) is the industry common name for the same physical package. All listed parts use identical package geometry and are mechanically interchangeable.

Q: Are all substitute parts automotive-qualified? A: Only TPSMB24A and SM6T24AY carry AEC-Q101 qualification. SMBJP6KE24A-TP, P6SMB24A, and SM6T24A do not have automotive qualification. For automotive applications, select only AEC-Q101 qualified parts.

Q: What is the significance of the different peak pulse current specifications? A: TPSMB24A, SMBJP6KE24A-TP, and P6SMB24A are rated at 18.4A (10/1000µs pulse). SM6T24AY and SM6T24A are rated at 93A (8/20µs pulse). These represent different transient test conditions. The 8/20µs pulse is a faster, more severe transient event, explaining the higher current rating for STMicroelectronics parts.

Q: Can I use a part with a higher operating temperature range? A: Yes, if your application operates within the lower temperature range of the substitute part. TPSMB24A operates to 175°C; P6SMB24A and SM6T24A operate to 150°C. Verify your circuit's maximum junction temperature requirement before selection.

Q: Are all parts available in the same packaging format (Tape & Reel)? A: TPSMB24A, SMBJP6KE24A-TP, P6SMB24A, and SM6T24AY are supplied in Tape & Reel (TR) format. SM6T24A is available in Cut Tape (CT) & Digi-Reel® format. Confirm packaging compatibility with your assembly process requirements.