P6SMB56A Equivalent & Substitute Parts

Part Overview

The P6SMB56A is an active Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection in surface-mount applications. This unidirectional Zener diode operates with a reverse standoff voltage of 47.8V and provides clamping at 77V with peak pulse current handling of 7.9A. The part is packaged in DO-214AA (SMB) format and is ROHS3 compliant with unlimited moisture sensitivity rating. Equivalent and substitute parts are identified based on matching electrical performance parameters and mechanical compatibility within the TVS diode category.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	47.8	V
Voltage - Breakdown (Min)	53.2	V
Voltage - Clamping (Max) @ Ipp	77	V
Current - Peak Pulse (10/1000µs)	7.9	A
Power - Peak Pulse	600	W
Package / Case	DO-214AA, SMB	-
Operating Temperature Range	-55°C ~ 150°C	TJ
Mounting Type	Surface Mount	-
RoHS Status	ROHS3 Compliant	-

Substitute Part Grouping Explanation

Substitution of TVS diodes in the P6SMB56A category is determined by the following critical parameters:

Voltage - Reverse Standoff (Typ): 47.8V ± tolerance
Voltage - Clamping (Max) @ Ipp: 77V ± tolerance
Current - Peak Pulse (10/1000µs): 7.9A ± tolerance
Package / Case: DO-214AA (SMB)
Mounting Type: Surface Mount
Power - Peak Pulse: 600W

Parts are grouped as direct equivalents when all electrical parameters fall within acceptable engineering tolerances and the mechanical package remains identical. Substitute parts from different manufacturers meeting these specifications are listed based on parameter alignment and product status.

Parameter Comparison

Part Number	Manufacturer	Voltage - Reverse Standoff (Typ)	Voltage - Breakdown (Min)	Voltage - Clamping (Max) @ Ipp	Current - Peak Pulse (10/1000µs)	Power - Peak Pulse	Package / Case	Operating Temperature	Product Status
P6SMB56A	Littelfuse Inc.	47.8V	53.2V	77V	7.9A	600W	DO-214AA, SMB	-55°C ~ 150°C	Active
TPSMB56A	Littelfuse Inc.	47.8V	53.2V	77V	7.9A	600W	DO-214AA, SMB	-65°C ~ 175°C	Active
SMBJ48A	Meritek	48V	53.3V	77.4V	7.75A	600W	DO-214AA (SMB)	-55°C ~ 150°C	Active
P6SMB56A-E3/5B	Vishay General Semiconductor - Diodes Division	47.8V	53.2V	77V	7.8A	600W	DO-214AA, SMB	-65°C ~ 150°C	Active
SMBJP6KE56A-TP	Micro Commercial Co	47.8V	53.2V	77V	7.9A	600W	DO-214AA, SMB	-55°C ~ 175°C	Active
P6SMB56A	Eaton - Electronics Division	47.8V	53.2V	77V	7.9A	600W	DO-214AA, SMB	-55°C ~ 150°C	Active

Engineering Selection Recommendations

All listed substitute parts maintain active product status and ROHS3 compliance. Selection between equivalents should be based on the following criteria:

TPSMB56A (Littelfuse Inc.) provides identical electrical specifications to the primary P6SMB56A with extended operating temperature range (-65°C ~ 175°C) and automotive-grade qualification (AEC-Q101), suitable for applications requiring enhanced thermal performance.

P6SMB56A-E3/5B (Vishay General Semiconductor - Diodes Division) offers equivalent voltage and clamping characteristics with peak pulse current of 7.8A, within acceptable tolerance, and extended lower temperature rating (-65°C), appropriate for wide-temperature-range applications.

SMBJP6KE56A-TP (Micro Commercial Co) matches all primary electrical parameters with extended upper temperature rating (-55°C ~ 175°C), providing thermal flexibility for demanding environments.

SMBJ48A (Meritek) presents minor parameter variations: reverse standoff voltage of 48V (versus 47.8V) and peak pulse current of 7.75A (versus 7.9A), with clamping voltage of 77.4V. These differences remain within typical engineering tolerances for TVS diode applications.

Frequently Asked Questions (FAQ)

Q: Can SMBJ48A be used as a direct replacement for P6SMB56A?

A: SMBJ48A is functionally compatible within typical application tolerances. The reverse standoff voltage difference of 0.2V and peak pulse current difference of 0.15A represent minor variations acceptable in most general-purpose overvoltage protection circuits. Both parts share identical package format (DO-214AA, SMB), power rating (600W), and RoHS compliance.

Q: What is the difference between P6SMB56A and TPSMB56A?

A: Both parts are manufactured by Littelfuse Inc. with identical electrical specifications (47.8V standoff, 77V clamping, 7.9A peak pulse). TPSMB56A features extended operating temperature range (-65°C ~ 175°C versus -55°C ~ 150°C) and carries automotive-grade qualification (AEC-Q101), making it suitable for automotive and high-reliability applications.

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

A: Yes. All listed substitute parts use DO-214AA (SMB) surface-mount package format, ensuring mechanical and footprint compatibility with P6SMB56A designs.

Q: What compliance certifications apply to these parts?

A: All substitute parts listed are ROHS3 compliant with unlimited moisture sensitivity rating (MSL 1). TPSMB56A additionally carries AEC-Q101 automotive qualification. REACH status varies by manufacturer; verify specific requirements for your application.

Q: Can I use P6SMB56A-E3/5B in place of the original P6SMB56A?

A: Yes. P6SMB56A-E3/5B is manufactured by Vishay and provides equivalent electrical performance with peak pulse current of 7.8A (0.1A tolerance from original 7.9A). Extended lower temperature rating (-65°C) provides additional thermal margin for cold-environment applications.

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