P6SMB51 Equivalent & Substitute Parts

Part Overview

The P6SMB51 is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., rated for 43.6V reverse standoff voltage with a 73.61V maximum clamping voltage at peak pulse current. Housed in a DO-214AA (SMBJ) surface mount package, this component is designed for general-purpose transient voltage suppression applications. The part is currently listed as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Substiute Parts

P6SMB51

Littelfuse Inc.In Stock: 2190P6SMB51 Datasheet

Current PartRFQ

P6SMB51A

Eaton - Electronics DivisionIn Stock: 6228P6SMB51A Datasheet

MFR RecommendedRFQ

SZP6SMB51AT3G

Littelfuse Inc.In Stock: 2732SZP6SMB51AT3G Datasheet

MFR RecommendedRFQ

P6SMB51A-E3/5B

Vishay General Semiconductor - Diodes DivisionIn Stock: 942P6SMB51A-E3/5B Datasheet

DirectRFQ

P6SMB51A

Eaton - Electronics DivisionIn Stock: 6228P6SMB51A Datasheet

MFR RecommendedRFQ

SMBJP6KE51A-TP

Micro Commercial CoIn Stock: 3494SMBJP6KE51A-TP Datasheet

MFR RecommendedRFQ

TVP06B510A-G

Comchip TechnologyIn Stock: 1202TVP06B510A-G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the P6SMB51 is determined by strict equivalence across the following critical parameters:

• Voltage - Reverse Standoff (Typ): 43.6V
• Voltage - Clamping (Max) @ Ipp: Must remain within acceptable tolerance of 73.61V
• Current - Peak Pulse (10/1000µs): 8.7A nominal
• Power - Peak Pulse: 600W
• Package / Case: DO-214AA or SMB equivalent
• Mounting Type: Surface Mount
• Type: Zener, Unidirectional

Substitute parts listed below meet these core electrical and mechanical requirements. Variations in clamping voltage (70.1V vs. 73.61V) and peak pulse current (8.6A vs. 8.7A) remain within the functional tolerance band for this component category. All substitute parts maintain the same surface mount package footprint and thermal characteristics.

Parameter Comparison

Engineering Selection Recommendations

All listed substitute parts are active products with confirmed availability and RoHS compliance. Selection among these alternatives should be based on the following criteria:

P6SMB51A (Eaton - Electronics Division): Active status with 6180 units in stock. Maintains exact electrical specifications (8.7A peak pulse current) and standard operating temperature range. Suitable for telecom applications.

SZP6SMB51AT3G (Littelfuse Inc.): Active status with automotive-grade qualification (AEC-Q101). Extended operating temperature range (-65 to 150°C) and capacitance specification (395pF @ 1MHz). Recommended for automotive and extended-temperature applications.

P6SMB51A-E3/5B (Vishay General Semiconductor - Diodes Division): Active status with TransZorb® series designation. Extended operating temperature range (-65 to 150°C). Suitable for general-purpose applications requiring broader thermal performance.

SMBJP6KE51A-TP (Micro Commercial Co): Active status with highest operating temperature range (-55 to 175°C). Maintains 8.7A peak pulse current specification. Suitable for high-temperature environments.

TVP06B510A-G (Comchip Technology): Active status with 1184 units in stock. Electrical specifications not fully detailed in available data; use only when other alternatives are unavailable or when Comchip sourcing is preferred.

Frequently Asked Questions (FAQ)

Q: Can P6SMB51A substitute for P6SMB51 in all applications?

A: Yes. P6SMB51A maintains the critical electrical parameters: 43.6V reverse standoff voltage, 8.7A peak pulse current, and 600W peak pulse power. The clamping voltage difference (70.1V vs. 73.61V) falls within acceptable tolerance for TVS diode applications. Package and mounting type are identical.

Q: What is the significance of the clamping voltage difference between P6SMB51 (73.61V) and substitute parts (70.1V)?

A: The clamping voltage represents the maximum voltage across the diode during transient suppression. The 3.61V difference is within the normal tolerance band for this component class and does not affect functional compatibility in standard transient suppression circuits.

Q: Should I use SZP6SMB51AT3G for automotive applications?

A: SZP6SMB51AT3G carries AEC-Q101 automotive qualification and extended temperature range (-65 to 150°C). Use this part for designs requiring automotive-grade components or operation in extended temperature environments.

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

A: Yes. All substitute parts use DO-214AA (SMB) surface mount package with identical footprint and thermal characteristics. No PCB layout changes are required.

Q: What is the difference between ROHS3 Compliant and RoHS Compliant designations?

A: Both designations indicate compliance with RoHS (Restriction of Hazardous Substances) regulations. ROHS3 refers to the third iteration of the directive. All listed parts meet current RoHS requirements.

Q: Can I use SMBJP6KE51A-TP in high-temperature applications?

A: Yes. SMBJP6KE51A-TP has the highest maximum operating temperature rating (-55 to 175°C) among all listed substitutes, making it suitable for high-temperature circuit environments.

Q: Is TVP06B510A-G a direct equivalent?

A: TVP06B510A-G shares the same package, power rating, and operating temperature range. However, detailed electrical specifications (breakdown voltage, clamping voltage, peak pulse current) are not provided in available data. Verify compatibility with Comchip technical documentation before use.