TPSMB20A Equivalent & Substitute Parts

Part Overview

The TPSMB20A is a unidirectional Zener transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc. in the DO-214AA (SMB) surface mount package. This component is designed for transient voltage protection applications with a reverse standoff voltage of 17.1V and clamping voltage of 27.7V at peak pulse current. The part is active in production status and carries automotive-grade qualification (AEC-Q101) with ROHS3 compliance. Equivalent and substitute parts are identified based on matching electrical characteristics, package compatibility, and operational parameters.

Substiute Parts

TPSMB20A

Littelfuse Inc.In Stock: 1223TPSMB20A Datasheet

Current PartRFQ

P6SMB20A

Eaton - Electronics DivisionIn Stock: 5158P6SMB20A Datasheet

DirectRFQ

SZP6SMB20AT3G

Littelfuse Inc.In Stock: 5473SZP6SMB20AT3G Datasheet

MFR RecommendedRFQ

SMBJP6KE20A-TP

Micro Commercial CoIn Stock: 30145SMBJP6KE20A-TP Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the TPSMB20A are qualified based on the following electrical and mechanical parameters:

Critical Matching Parameters:

• Voltage - Reverse Standoff (Typ): 17.1V
• Voltage - Breakdown (Min): 19V
• Voltage - Clamping (Max) @ Ipp: 27.7V
• Current - Peak Pulse (10/1000µs): 21.7A to 22A
• Power - Peak Pulse: 600W
• Package / Case: DO-214AA or SMB
• Unidirectional Channels: 1
• Type: Zener
• Mounting Type: Surface Mount

Acceptable Variation Ranges:

• Peak pulse current tolerance: ±0.3A from specified value
• Operating temperature range: Minimum -55°C, maximum 150°C or higher
• RoHS compliance status: ROHS3 or equivalent

All identified substitute parts maintain these electrical specifications within acceptable engineering tolerances and are compatible with the same PCB footprint and assembly processes.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection (TPSMB20A): The TPSMB20A remains the preferred choice for applications requiring automotive-grade qualification (AEC-Q101) and extended upper operating temperature to 175°C. This part carries Littelfuse manufacturing certification and ROHS3 compliance.

Equivalent Selection (SZP6SMB20AT3G): The SZP6SMB20AT3G is a direct Littelfuse equivalent with identical electrical specifications and automotive-grade qualification. This part is suitable as a primary substitute when TPSMB20A availability is limited. Both parts share the same manufacturer, AEC-Q101 qualification, and ROHS3 compliance status.

Compatible Substitute (SMBJP6KE20A-TP): The SMBJP6KE20A-TP from Micro Commercial Co meets all electrical specifications and package requirements. This part extends the upper operating temperature to 175°C and carries ROHS3 compliance. Selection is appropriate when supply chain requirements necessitate multi-source qualification.

Alternative Substitute (P6SMB20A): The P6SMB20A from Eaton - Electronics Division provides electrical compatibility with a peak pulse current of 21.7A, within acceptable tolerance of the 22A specification. Operating temperature range is -55 to 150°C. This part is suitable for applications where the lower temperature ceiling is acceptable and RoHS compliance (non-ROHS3) meets regulatory requirements.

Frequently Asked Questions (FAQ)

Q: Can P6SMB20A be used as a direct replacement for TPSMB20A?

A: P6SMB20A is electrically compatible with matching voltage specifications and package type. The peak pulse current is 21.7A compared to 22A, which is within acceptable engineering tolerance. The primary consideration is the operating temperature range: P6SMB20A is rated to 150°C maximum versus TPSMB20A at 175°C. Selection depends on application temperature requirements.

Q: What is the difference between TPSMB20A and SZP6SMB20AT3G?

A: Both parts are manufactured by Littelfuse Inc. and share identical electrical specifications, automotive-grade qualification (AEC-Q101), and ROHS3 compliance. The primary difference is packaging designation: TPSMB20A uses Tape & Reel (TR) packaging, while SZP6SMB20AT3G also uses Tape & Reel (TR). Both are suitable for high-volume surface mount assembly.

Q: Are all substitute parts compatible with the same PCB footprint?

A: All identified substitute parts use the DO-214AA (SMB) package, which maintains identical PCB footprint and land pattern compatibility. No PCB redesign is required when substituting between these parts.

Q: Which substitute part has the widest operating temperature range?

A: Both TPSMB20A and SMBJP6KE20A-TP are rated from -55°C to 175°C (or -65°C to 175°C for TPSMB20A). These provide the widest temperature coverage among the substitute options.

Q: Does RoHS compliance differ between substitute parts?

A: TPSMB20A, SZP6SMB20AT3G, and SMBJP6KE20A-TP carry ROHS3 compliance. P6SMB20A carries RoHS compliance without the ROHS3 designation. For applications requiring ROHS3 certification, select from the first three options.

Q: What is the moisture sensitivity level for all parts?

A: All substitute parts carry Moisture Sensitivity Level (MSL) 1 (Unlimited), indicating no moisture sensitivity restrictions during storage or handling.