P6SMB39AHE3_A/I Equivalent & Substitute Parts

Part Overview

The P6SMB39AHE3_A/I is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This surface mount component operates in the 33.3V reverse standoff voltage range with a 53.9V maximum clamping voltage and 11.1A peak pulse current rating. The device is housed in a DO-214AA (SMB) package and is qualified to AEC-Q101 automotive standards with ROHS3 compliance.

The P6SMB39AHE3_A/I is currently listed as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications requiring this voltage suppression specification.

Substiute Parts

P6SMB39AHE3_A/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 836P6SMB39AHE3_A/I Datasheet

Current PartRFQ

P6SMB39AHE3_B/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 784P6SMB39AHE3_B/I Datasheet

MFR RecommendedRFQ

P6SMB39A-AU_R2_000A1

Panjit International Inc.In Stock: 1186P6SMB39A-AU_R2_000A1 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the P6SMB39AHE3_A/I is determined by strict equivalence across the following critical parameters:

• Voltage - Reverse Standoff (Typ): 33.3V
• Voltage - Clamping (Max) @ Ipp: 53.9V
• Current - Peak Pulse (10/1000µs): 11.1A minimum
• Power - Peak Pulse: 600W
• Package / Case: DO-214AA (SMB)
• Type: Unidirectional Zener
• Automotive Grade and AEC-Q101 qualification

Both identified substitute parts meet these core electrical and mechanical requirements. Differences in operating temperature range and manufacturer do not disqualify substitution when the specified voltage and current parameters are maintained.

Parameter Comparison

Engineering Selection Recommendations

Both substitute parts are qualified alternatives to the obsolete P6SMB39AHE3_A/I based on electrical parameter equivalence and compliance certifications.

P6SMB39AHE3_B/I is the manufacturer-recommended direct substitute from Vishay General Semiconductor. This part maintains identical electrical specifications and operating temperature range (-65°C to 150°C). Active product status ensures ongoing availability and supply chain support. This option is preferred for applications requiring continuity with the original design specification.

P6SMB39A-AU_R2_000A1 from Panjit International Inc. provides electrical equivalence with a marginally higher peak pulse current rating (11.2A versus 11.1A) and meets all automotive and compliance requirements. The operating temperature range is -55°C to 150°C, which is suitable for most automotive applications but does not extend to the lower -65°C limit of the original part. This option is suitable for applications where the lower temperature limit is not a design requirement.

Both parts are in active production, ROHS3 compliant, AEC-Q101 qualified, and available in the same DO-214AA (SMB) surface mount package.

Frequently Asked Questions (FAQ)

Q: Can P6SMB39AHE3_B/I be used as a direct replacement for P6SMB39AHE3_A/I?

A: Yes. P6SMB39AHE3_B/I is the manufacturer-recommended substitute with identical electrical parameters, operating temperature range, and package configuration. The primary difference is product status (active versus obsolete) and packaging format (Tape & Reel).

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

A: Both parts meet the core electrical requirements (33.3V standoff, 53.9V clamping, 11.1A+ peak pulse current, 600W power rating). The Panjit part (P6SMB39A-AU_R2_000A1) has a slightly higher peak pulse current specification (11.2A) and a narrower operating temperature range (-55°C to 150°C versus -65°C to 150°C). Both are automotive-grade and AEC-Q101 qualified.

Q: Are these parts pin-compatible?

A: Yes. All three parts use the DO-214AA (SMB) surface mount package with identical pinout and footprint. No PCB layout modifications are required for substitution.

Q: Do these substitutes maintain automotive qualification?

A: Yes. Both substitute parts carry automotive grade designation and AEC-Q101 qualification, matching the original part's compliance profile.

Q: Which substitute should I select for new designs?

A: For new designs, either active substitute is acceptable. P6SMB39AHE3_B/I is recommended if the full -65°C to 150°C temperature range is required. P6SMB39A-AU_R2_000A1 is suitable if the -55°C to 150°C range meets application requirements and supply chain flexibility is desired.