P6SMB39A-Q Equivalent & Substitute Parts

Part Overview

The P6SMB39A-Q is an active Transient Voltage Suppressor (TVS) diode manufactured by Bourns Inc., designed for telecom applications requiring transient voltage protection. This unidirectional zener diode operates in the 33.3V reverse standoff voltage range with a 53.9V maximum clamping voltage and 11.3A peak pulse current capability. The component is packaged in DO-214AA (SMB) surface mount format and meets automotive-grade AEC-Q101 qualification standards. Equivalent and substitute parts are identified based on matching electrical performance parameters, mechanical compatibility, and compliance certifications to ensure functional interchangeability in circuit protection applications.

Substiute Parts

P6SMB39A-Q

Bourns Inc.In Stock: 949P6SMB39A-Q Datasheet

Current PartRFQ

SMBJE33AH

Eaton - Electronics DivisionIn Stock: 21617SMBJE33AH Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the P6SMB39A-Q is determined by strict equivalence across the following critical electrical and mechanical parameters:

Voltage Parameters: Reverse standoff voltage (33V nominal range), breakdown voltage minimum (36.7V–37.1V), and clamping voltage maximum (53.3V–53.9V) must remain within acceptable tolerance bands to maintain circuit protection integrity.

Current and Power Ratings: Peak pulse current (11.3A) and peak pulse power (600W) must be identical or exceed the original specification to ensure adequate transient suppression capability.

Package and Mounting: DO-214AA (SMB) surface mount package is mandatory for mechanical and thermal compatibility with existing PCB layouts.

Compliance and Grade: Automotive-grade classification and AEC-Q101 qualification are required for applications demanding reliability and traceability standards.

Environmental Specifications: Operating temperature range (-55°C to 150°C junction temperature) and moisture sensitivity level (MSL 1) must be maintained.

The SMBJE33AH from Eaton - Electronics Division meets all substitution criteria within these defined parameters.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection: The P6SMB39A-Q remains the primary component choice when available. Bourns Inc. maintains active product status with 875 units in current inventory.

Substitute Selection: The SMBJE33AH from Eaton - Electronics Division is a qualified substitute when P6SMB39A-Q availability is constrained. This substitute maintains identical electrical performance across all critical parameters, including peak pulse current (11.3A), peak pulse power (600W), and operating temperature range (-55°C to 150°C). Both components carry automotive-grade classification and AEC-Q101 qualification, ensuring equivalent reliability and traceability for telecom protection applications.

Compliance Assurance: Both components are ROHS3 compliant, REACH unaffected, and classified under ECCN EAR99 with identical HTSUS coding (8541.10.0080), confirming regulatory and supply chain compatibility.

Inventory Consideration: The SMBJE33AH offers significantly higher inventory availability (21,528 units) compared to the P6SMB39A-Q (875 units), making it a practical alternative for high-volume production requirements.

Frequently Asked Questions (FAQ)

Q: Can the SMBJE33AH directly replace the P6SMB39A-Q in existing designs?

A: Yes. The SMBJE33AH is a direct functional equivalent. Both components share identical package geometry (DO-214AA SMB), mounting type (surface mount), peak pulse current (11.3A), peak pulse power (600W), and operating temperature range (-55°C to 150°C). Voltage parameters (reverse standoff, breakdown, and clamping) are within equivalent tolerance bands. No circuit redesign or PCB layout modification is required.

Q: What are the key voltage differences between these parts?

A: The P6SMB39A-Q specifies 33.3V reverse standoff with 53.9V maximum clamping voltage. The SMBJE33AH specifies 33V reverse standoff with 53.3V maximum clamping voltage. These differences (0.3V standoff, 0.6V clamping) fall within normal manufacturing tolerance bands for TVS diodes in this voltage class and do not affect circuit protection performance.

Q: Are both components suitable for automotive applications?

A: Yes. Both the P6SMB39A-Q and SMBJE33AH carry automotive-grade classification and AEC-Q101 qualification, meeting reliability and traceability requirements for automotive telecom protection circuits.

Q: What is the significance of the DO-214AA (SMB) package?

A: The DO-214AA package, commonly designated SMB, is a standardized surface mount package for TVS diodes. Both components use this identical package, ensuring mechanical compatibility with existing PCB footprints, reflow soldering processes, and thermal management characteristics.

Q: Do these components have different moisture sensitivity requirements?

A: No. Both components are classified as MSL 1 (Unlimited), indicating no moisture sensitivity restrictions. Standard handling and storage procedures apply without special desiccant or humidity control requirements.

Q: Are there any regulatory or compliance differences?

A: No. Both components are ROHS3 compliant, REACH unaffected, and carry identical ECCN (EAR99) and HTSUS (8541.10.0080) classifications, confirming equivalent regulatory and export compliance status.