P6SMBJ47 Equivalent & Substitute Parts

Part Overview

The P6SMBJ47 is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose transient protection applications. This component features a 40.2V reverse standoff voltage and 68.04V maximum clamping voltage with 9.4A peak pulse current capability in a surface-mount DO-214AA (SMB) package. The part is classified as obsolete, making identification of active equivalent alternatives essential for ongoing design support and procurement.

Substiute Parts

P6SMBJ47

Littelfuse Inc.In Stock: 1143P6SMBJ47 Datasheet

Current PartRFQ

P6SMB47A

Eaton - Electronics DivisionIn Stock: 17238P6SMB47A Datasheet

MFR RecommendedRFQ

SMBJP6KE47A-TP

Micro Commercial CoIn Stock: 3979SMBJP6KE47A-TP Datasheet

DirectRFQ

P6SMB47A

Eaton - Electronics DivisionIn Stock: 17238P6SMB47A Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the P6SMBJ47 is determined by strict equivalence across the following critical electrical and mechanical parameters:

• Reverse Standoff Voltage: 40.2V (Typ)
• Peak Pulse Current: 9.4A (10/1000µs)
• Peak Pulse Power: 600W
• Unidirectional Channel Configuration: 1
• Mounting Type: Surface Mount
• Package Type: DO-214AA / SMB form factor
• Zener diode type classification

Substitute parts must maintain these specifications within the allowed tolerances defined by the component category. Clamping voltage variations within the same voltage class are acceptable provided all other parameters remain equivalent.

Parameter Comparison

Engineering Selection Recommendations

Both P6SMB47A (Eaton - Electronics Division) and SMBJP6KE47A-TP (Micro Commercial Co) are active product alternatives to the obsolete P6SMBJ47.

P6SMB47A maintains identical electrical specifications and operating temperature range to the original part. This component carries RoHS compliance certification and is available in high inventory quantities (17,200 pcs), supporting sustained procurement requirements.

SMBJP6KE47A-TP provides an extended operating temperature range (-55°C ~ 175°C) compared to the original specification, offering additional thermal margin for demanding applications. This part is ROHS3 compliant and REACH unaffected, with active product status and adequate inventory availability (3,962 pcs).

Both substitutes maintain the critical electrical parameters: 40.2V reverse standoff voltage, 9.4A peak pulse current, and 600W peak pulse power. The clamping voltage differential (64.8V versus 68.04V) remains within acceptable tolerance for the 47V voltage class classification.

Frequently Asked Questions (FAQ)

Q: Can P6SMB47A or SMBJP6KE47A-TP be used as direct replacements for P6SMBJ47?

A: Yes. Both parts maintain equivalent reverse standoff voltage (40.2V), peak pulse current (9.4A), and peak pulse power (600W) specifications. The clamping voltage variation is within the tolerance band for this voltage class. Both are surface-mount DO-214AA (SMB) package devices with identical pinout and footprint compatibility.

Q: What is the difference in clamping voltage between the main part and substitutes?

A: The P6SMBJ47 specifies 68.04V maximum clamping voltage, while both P6SMB47A and SMBJP6KE47A-TP specify 64.8V maximum clamping voltage. This 3.24V difference is within the acceptable tolerance range for 47V class TVS diodes and does not affect functional equivalence for general-purpose transient protection applications.

Q: Are there temperature range considerations when selecting between substitutes?

A: The P6SMB47A maintains the original operating range of -55°C ~ 150°C (TJ). The SMBJP6KE47A-TP extends this to -55°C ~ 175°C (TJ), providing additional thermal headroom. Selection depends on application thermal requirements; both are functionally equivalent at the original specification limits.

Q: What compliance certifications apply to these substitutes?

A: P6SMB47A carries RoHS compliance. SMBJP6KE47A-TP carries ROHS3 compliance and is REACH unaffected. Both meet the RoHS requirements applicable to their respective manufacturing standards.

Q: Are packaging and tape & reel options available?

A: P6SMB47A is supplied in Tape & Reel (TR) packaging. SMBJP6KE47A-TP is also supplied in Tape & Reel (TR) packaging. Both support automated assembly processes with standard SMB reel specifications.