TPSMB51CA Equivalent & Substitute Parts

Part Overview

The TPSMB51CA is a bidirectional transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for surface mount applications in the DO-214AA package. This component provides transient overvoltage protection with a 43.6V reverse standoff voltage and 70.1V maximum clamping voltage. The part is active in production status with automotive-grade qualification (AEC-Q101) and ROHS3 compliance. Equivalent and substitute parts are identified based on matching electrical performance parameters and mechanical compatibility within the DO-214AA package family.

Substiute Parts

TPSMB51CA

Littelfuse Inc.In Stock: 10008TPSMB51CA Datasheet

Current PartRFQ

P6SMB51CA

Good-Ark SemiconductorIn Stock: 4990P6SMB51CA Datasheet

DirectRFQ

P6SMB51CA

Good-Ark SemiconductorIn Stock: 4990P6SMB51CA Datasheet

DirectRFQ

SMBJP6KE51CA-TP

Micro Commercial CoIn Stock: 3886SMBJP6KE51CA-TP Datasheet

DirectRFQ

P6SMB51CA-E3/52

Vishay General Semiconductor - Diodes DivisionIn Stock: 4220P6SMB51CA-E3/52 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the TPSMB51CA are qualified based on the following electrical and mechanical parameters:

• Voltage - Reverse Standoff (Typ): 43.6V
• Voltage - Breakdown (Min): 48.5V
• Voltage - Clamping (Max) @ Ipp: 70.1V
• Current - Peak Pulse (10/1000µs): 8.6A to 8.7A
• Power - Peak Pulse: 600W
• Package / Case: DO-214AA, SMB
• Mounting Type: Surface Mount
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level: 1 (Unlimited)

All identified substitutes maintain the critical voltage and power specifications required for transient suppression applications. Variations in peak pulse current (8.6A vs 8.7A) and operating temperature ranges are within acceptable tolerance for equivalent functionality.

Parameter Comparison

Engineering Selection Recommendations

All four parts maintain active production status and ROHS3 compliance. Selection among these TVS diode substitutes depends on application-specific operating temperature requirements and inventory availability.

For applications requiring the full -65°C to 175°C operating temperature range, the TPSMB51CA (Littelfuse) and SMBJP6KE51CA-TP (Micro Commercial) are suitable. The TPSMB51CA offers automotive-grade AEC-Q101 qualification, making it the primary choice for automotive applications.

For general-purpose applications with standard temperature ranges, P6SMB51CA (Good-Ark) and P6SMB51CA-E3/52 (Vishay) provide equivalent electrical performance. The Vishay part is manufacturer-recommended as an equivalent option.

All substitutes are electrically interchangeable within the specified parameter tolerances and maintain identical mechanical compatibility in the DO-214AA surface mount package.

Frequently Asked Questions (FAQ)

Q: What determines if a part can substitute for the TPSMB51CA?

A: Substitution is based on matching voltage specifications (43.6V reverse standoff, 48.5V breakdown minimum, 70.1V clamping maximum), peak pulse power (600W), package type (DO-214AA, SMB), and compliance certifications (ROHS3). Peak pulse current tolerance of 8.6A to 8.7A is acceptable for equivalent functionality.

Q: Are there temperature range differences between substitutes?

A: Yes. The TPSMB51CA and SMBJP6KE51CA-TP support -55°C to 175°C. The TPSMB51CA extends to -65°C minimum. The P6SMB51CA and P6SMB51CA-E3/52 operate to -55°C or -65°C minimum with 150°C maximum. Applications requiring full -65°C to 175°C operation should specify TPSMB51CA or SMBJP6KE51CA-TP.

Q: Is the TPSMB51CA suitable for automotive applications?

A: Yes. The TPSMB51CA carries automotive-grade qualification with AEC-Q101 certification. Substitute parts do not list automotive qualification in the provided specifications.

Q: Can these parts be used interchangeably on the same PCB?

A: Yes. All parts use identical DO-214AA surface mount packaging and maintain the same electrical performance within specified tolerances. No PCB layout modifications are required for substitution.

Q: What is the significance of the 8.6A vs 8.7A peak pulse current difference?

A: Both values fall within the acceptable operating range for this voltage class. The 0.1A difference does not affect circuit protection performance in typical transient suppression applications.