P6SMBJ56A Equivalent & Substitute Parts

Part Overview

The P6SMBJ56A is a unidirectional Zener transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc. in the DO-214AA (SMB) surface mount package. It provides 77V clamping protection with 7.9A peak pulse current capability and 600W peak pulse power dissipation. The part is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements.

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
Operating Temperature Range	-55°C ~ 150°C	TJ
Mounting Type	Surface Mount	-
Package / Case	DO-214AA, SMB	-
Type	Zener	-
Unidirectional Channels	1	-

Substitute Part Grouping Explanation

Substitution of the P6SMBJ56A is determined by strict equivalence across the following electrical and mechanical parameters:

Voltage - Reverse Standoff (Typ): 47.8V
Voltage - Breakdown (Min): 53.2V
Voltage - Clamping (Max) @ Ipp: 77V
Current - Peak Pulse (10/1000µs): 7.9A
Power - Peak Pulse: 600W
Package / Case: DO-214AA, SMB (surface mount)
Type: Zener, unidirectional (1 channel)

All substitute parts listed maintain these core electrical specifications and physical package compatibility. Variations in operating temperature range, product status, manufacturer, and compliance certifications do not affect functional substitutability for the specified electrical performance.

Parameter Comparison

Parameter	P6SMBJ56A (Littelfuse)	TPSMB56A (Littelfuse)	P6SMB56A (Eaton)	SMBJP6KE56A-TP (Micro Commercial Co)
Voltage - Reverse Standoff (Typ)	47.8V	47.8V	47.8V	47.8V
Voltage - Breakdown (Min)	53.2V	53.2V	53.2V	53.2V
Voltage - Clamping (Max) @ Ipp	77V	77V	77V	77V
Current - Peak Pulse (10/1000µs)	7.9A	7.9A	7.9A	7.9A
Power - Peak Pulse	600W	600W	600W	600W
Package / Case	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB
Operating Temperature Range	-55°C ~ 150°C	-65°C ~ 175°C	-55°C ~ 150°C	-55°C ~ 175°C
Product Status	Obsolete	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	RoHS Compliant	ROHS3 Compliant

Engineering Selection Recommendations

All four parts meet the core electrical and mechanical requirements for direct substitution. Selection should be based on product availability and compliance requirements:

TPSMB56A (Littelfuse) offers the widest operating temperature range (-65°C ~ 175°C) and includes AEC-Q101 automotive qualification, making it suitable for applications requiring extended temperature performance or automotive-grade reliability.

P6SMB56A (Eaton) maintains the original operating temperature range (-55°C ~ 150°C) and is specified for telecom applications, providing continuity with the original design intent.

SMBJP6KE56A-TP (Micro Commercial Co) extends the upper operating temperature to 175°C while maintaining the lower limit at -55°C, offering a middle-ground thermal performance option.

All substitute parts are RoHS compliant and carry MSL 1 (Unlimited) moisture sensitivity ratings, indicating no special handling requirements during storage or assembly.

Frequently Asked Questions (FAQ)

Q: Can TPSMB56A replace P6SMBJ56A in all applications?

A: Yes. TPSMB56A maintains identical electrical specifications (47.8V standoff, 77V clamping, 7.9A peak pulse, 600W peak power) and package compatibility (DO-214AA, SMB). The extended operating temperature range (-65°C ~ 175°C versus -55°C ~ 150°C) and automotive qualification do not restrict its use in standard applications.

Q: What is the difference between P6SMB56A and SMBJP6KE56A-TP?

A: Both parts are electrically equivalent with identical voltage and current ratings. P6SMB56A (Eaton) operates from -55°C ~ 150°C, while SMBJP6KE56A-TP (Micro Commercial Co) operates from -55°C ~ 175°C. Selection depends on thermal environment requirements and supplier availability.

Q: Are all substitute parts available in the same packaging format?

A: All substitute parts use DO-214AA (SMB) surface mount packages. TPSMB56A and SMBJP6KE56A-TP are supplied in Tape & Reel (TR) format. Verify packaging format requirements for your assembly process before procurement.

Q: Does the automotive qualification of TPSMB56A affect its use in non-automotive applications?

A: No. AEC-Q101 qualification indicates additional testing and reliability assurance. Parts qualified to automotive standards are suitable for general-purpose applications without restriction.

Q: What compliance certifications apply to all substitute parts?

A: All parts are RoHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity ratings. TPSMB56A includes REACH Affected status, while SMBJP6KE56A-TP is REACH Unaffected. Verify REACH compliance requirements for your specific application and supply chain.

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