P6SMB36AT3 Equivalent & Substitute Parts

Part Overview

The P6SMB36AT3 is a unidirectional transient voltage suppressor (TVS) diode manufactured by onsemi, rated for 600W peak pulse power at 36V reverse standoff voltage in SMB package. This component is classified as obsolete, necessitating identification of active equivalent parts for new designs and ongoing production requirements. Substitute parts must maintain functional compatibility across voltage clamping, peak pulse current, and thermal operating ranges while accommodating packaging and compliance variations.

Substiute Parts

P6SMB36AT3

onsemiIn Stock: 2718P6SMB36AT3 Datasheet

Current PartRFQ

P6SMB350CA

Eaton - Electronics DivisionIn Stock: 1607P6SMB350CA Datasheet

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PTVS33VP1UP,115

Nexperia USA Inc.In Stock: 92623PTVS33VP1UP,115 Datasheet

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SM6T36A

STMicroelectronicsIn Stock: 15872SM6T36A Datasheet

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SMBJ30A

MDDIn Stock: 62919SMBJ30A Datasheet

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SMBJ30A

MDDIn Stock: 62919SMBJ30A Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts are identified based on the following critical parameters that determine functional equivalence:

• Power Rating: 600W peak pulse power (maintained across all substitutes)
• Voltage Class: Reverse standoff voltage in the 30V–36V range
• Package Type: SMB (DO-214AA) or compatible surface mount packages
• Zener Type: Unidirectional TVS diodes
• Operating Temperature Range: -55°C to 150°C
• Mounting: Surface mount technology

The substitute parts listed below satisfy these criteria with variations in clamping voltage, peak pulse current, and compliance certifications. Selection depends on specific circuit requirements and compliance mandates for the application.

Parameter Comparison

Engineering Selection Recommendations

SM6T36A (STMicroelectronics) is the primary substitute for P6SMB36AT3. It maintains the closest voltage standoff specification (30.8V vs. 36V), operates within the same temperature range, and is ROHS3 compliant. The SMB package ensures direct mechanical compatibility. Peak pulse current of 62A (8/20µs) provides margin for transient suppression applications.

SMBJ30A (MDD) serves as an alternative with 30V reverse standoff voltage and RoHS compliance. The 12.4A peak pulse current and 48.4V clamping voltage are suitable for general-purpose TVS applications in the 30V class.

PTVS33VP1UP,115 (Nexperia) offers 33V reverse standoff voltage with ROHS3 compliance and automotive-grade qualification (AEC-Q101). However, the SOD-128 package differs from the SMB footprint and requires PCB layout modification. The 11.3A peak pulse current is appropriate for lower-current transient suppression circuits.

P6SMB350CA (Eaton) operates at 300V reverse standoff voltage, placing it outside the 30V–36V voltage class of the original part. This substitute is applicable only to circuits requiring high-voltage transient suppression and is not recommended as a direct replacement for 36V applications.

All active substitutes maintain 600W peak pulse power rating and -55°C to 150°C operating temperature range. Selection should prioritize compliance requirements (RoHS status) and package compatibility with existing PCB designs.

Frequently Asked Questions (FAQ)

Q: Can P6SMB350CA replace P6SMB36AT3 directly? A: No. P6SMB350CA is rated for 300V reverse standoff voltage, whereas P6SMB36AT3 operates at 36V. This part is suitable only for high-voltage transient suppression circuits and will not function as a direct replacement in 36V applications.

Q: What is the primary difference between SM6T36A and SMBJ30A? A: SM6T36A (STMicroelectronics) has a reverse standoff voltage of 30.8V and peak pulse current of 62A (8/20µs), while SMBJ30A (MDD) is rated at 30V standoff with 12.4A peak pulse current. SM6T36A provides higher current handling capacity and closer voltage matching to the original 36V specification. Both use SMB packaging.

Q: Is PTVS33VP1UP,115 compatible with existing P6SMB36AT3 PCB layouts? A: No. PTVS33VP1UP,115 uses SOD-128 package, whereas P6SMB36AT3 uses SMB (DO-214AA) package. PCB footprint and land pattern modifications are required. This substitute is recommended only when design flexibility permits package change.

Q: Which substitute offers the best RoHS compliance? A: SM6T36A and PTVS33VP1UP,115 are both ROHS3 compliant. SMBJ30A is RoHS compliant. P6SMB350CA and the original P6SMB36AT3 are RoHS non-compliant. For new designs requiring RoHS compliance, SM6T36A is the preferred choice due to SMB package compatibility.

Q: Do all substitutes maintain the same operating temperature range? A: Yes. All substitute parts operate within -55°C to 150°C range, matching the original P6SMB36AT3 specification. Temperature measurement points vary (TJ for junction temperature, TA for ambient), but the functional range is equivalent.

Q: What is the significance of peak pulse current differences among substitutes? A: Peak pulse current determines the maximum transient current the TVS diode can suppress. SM6T36A (62A) provides the highest margin, suitable for high-energy transient events. SMBJ30A (12.4A) and PTVS33VP1UP,115 (11.3A) are appropriate for lower-energy transients. Circuit analysis is required to select the appropriate current rating.