P6SMBJ56C Equivalent & Substitute Parts

Part Overview

The P6SMBJ56C is a transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection in surface mount applications. This component features a 47.8V reverse standoff voltage with an 80.85V maximum clamping voltage and 7.9A peak pulse current capability in a DO-214AA (SMB) package. The product is currently obsolete, necessitating identification of active equivalent alternatives that maintain electrical and mechanical compatibility for new designs or production continuity.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	47.8	V
Voltage - Breakdown (Min)	50.4	V
Voltage - Clamping (Max) @ Ipp	80.85	V
Current - Peak Pulse (10/1000µs)	7.9	A
Power - Peak Pulse	600	W
Operating Temperature Range	-55 to 150	°C
Package / Case	DO-214AA, SMB	—
Mounting Type	Surface Mount	—
Type	Zener	—
Bidirectional Channels	1	—

Substitute Part Grouping Explanation

Substitution of the P6SMBJ56C is determined by strict equivalence in the following electrical and mechanical parameters:

Reverse standoff voltage: 47.8V (typical)
Peak pulse current: 7.9A
Package type: DO-214AA (SMB) surface mount
Bidirectional channels: 1
Type: Zener TVS diode

Substitute parts must maintain these core specifications. Variations in clamping voltage (within the specified range) and operating temperature range are permissible provided the part remains functionally compatible with the original application requirements. All substitute parts identified are active products with current manufacturing status.

Parameter Comparison

Parameter	P6SMBJ56C (Littelfuse)	SMBJP6KE56CA-TP (Micro Commercial Co)	P6SMB56CA (Eaton)
Voltage - Reverse Standoff (Typ)	47.8V	47.8V	47.8V
Voltage - Breakdown (Min)	50.4V	53.2V	53.2V
Voltage - Clamping (Max) @ Ipp	80.85V	77V	77V
Current - Peak Pulse (10/1000µs)	7.9A	7.9A	7.9A
Power - Peak Pulse	600W	600W	600W
Operating Temperature Range	-55 to 150°C	-55 to 175°C	-55 to 150°C
Package / Case	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Product Status	Obsolete	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	RoHS Compliant

Engineering Selection Recommendations

Both SMBJP6KE56CA-TP (Micro Commercial Co) and P6SMB56CA (Eaton) are active product alternatives to the obsolete P6SMBJ56C. Selection between these substitutes is based on the following criteria:

SMBJP6KE56CA-TP is supplied in Tape & Reel (TR) packaging and offers an extended operating temperature range to 175°C, with ROHS3 compliance and REACH unaffected status. This option is suitable for high-volume automated assembly and applications requiring elevated temperature performance.

P6SMB56CA is supplied in Cut Tape (CT) and Digi-Reel® packaging with ROHS compliance. This option is suitable for applications with standard temperature requirements (-55 to 150°C) and provides manufacturer support from Eaton - Electronics Division.

Both parts maintain identical reverse standoff voltage (47.8V), peak pulse current (7.9A), and power dissipation (600W) specifications. The clamping voltage differential (77V versus 80.85V) falls within acceptable substitution parameters for general-purpose transient suppression applications.

Frequently Asked Questions (FAQ)

Q: Can P6SMB56CA or SMBJP6KE56CA-TP directly replace P6SMBJ56C in existing designs?

A: Yes. Both substitute parts maintain the critical electrical parameters: 47.8V reverse standoff voltage, 7.9A peak pulse current, and 600W power dissipation. The DO-214AA (SMB) package and surface mount configuration are identical. Clamping voltage differences (77V versus 80.85V) are within acceptable tolerance for general-purpose TVS applications.

Q: What is the difference between the two substitute parts?

A: SMBJP6KE56CA-TP offers extended operating temperature range (-55 to 175°C) and Tape & Reel packaging for high-volume production. P6SMB56CA operates to 150°C and is available in Cut Tape and Digi-Reel® formats. Both are electrically equivalent at the reverse standoff and peak pulse specifications.

Q: Are there packaging considerations when switching from P6SMBJ56C?

A: The original part packaging is not specified in available data. SMBJP6KE56CA-TP is supplied in Tape & Reel format, while P6SMB56CA is available in Cut Tape and Digi-Reel® packaging. Verify packaging compatibility with your assembly process requirements.

Q: Do both substitute parts meet RoHS compliance?

A: Yes. SMBJP6KE56CA-TP is ROHS3 compliant. P6SMB56CA is RoHS compliant. Both meet environmental regulatory requirements for electronic component manufacturing.

Q: What is the significance of the clamping voltage difference (80.85V vs. 77V)?

A: The clamping voltage represents the maximum voltage across the TVS diode during transient suppression at peak pulse current. The 3.85V difference between P6SMBJ56C (80.85V) and the substitutes (77V) is within normal manufacturing tolerance and does not affect functional compatibility for general-purpose overvoltage protection applications.

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