P6SMB11AT3 Equivalent & Substitute Parts

Part Overview

The P6SMB11AT3 is a unidirectional Zener transient voltage suppressor (TVS) diode manufactured by onsemi, rated for 9.4V reverse standoff voltage with 15.6V maximum clamping voltage and 38A peak pulse current. Housed in the DO-214AA (SMB) surface mount package, this component is designed for transient voltage protection in electronic circuits.

The P6SMB11AT3 is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production and maintenance requirements.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	9.4	V
Voltage - Breakdown (Min)	10.5	V
Voltage - Clamping (Max) @ Ipp	15.6	V
Current - Peak Pulse (10/1000µs)	38	A
Power - Peak Pulse	600	W
Operating Temperature Range	-65°C to 150°C	TJ
Package / Case	DO-214AA, SMB	—
Type	Zener	—
Unidirectional Channels	1	—

Substitute Part Grouping Explanation

Substitution eligibility for the P6SMB11AT3 is determined by the following critical parameters:

Voltage Rating Match: Reverse standoff voltage (9.4V typical), breakdown voltage minimum (10.5V), and clamping voltage maximum (15.6V) must remain within the original specifications to ensure equivalent transient protection performance.
Current Handling: Peak pulse current rating must meet or exceed 38A at the 10/1000µs pulse duration to maintain protection capability.
Package Compatibility: Surface mount DO-214AA (SMB) package is required for mechanical and electrical compatibility with existing PCB layouts.
Diode Type: Unidirectional Zener configuration with single channel must be preserved.

Substitute parts are grouped into two categories:

Direct Equivalents: Parts with matching voltage ratings (9.4V standoff, 10.5V breakdown, 15.6V clamping) and compatible current ratings.

Similar Alternatives: Parts with comparable voltage ratings and enhanced current handling or temperature ranges, suitable for applications where the original specifications can be met with higher performance margins.

Parameter Comparison

Part Number	Manufacturer	Standoff Voltage (V)	Breakdown Voltage (V)	Clamping Voltage (V)	Peak Pulse Current (A)	Peak Pulse Power (W)	Operating Temp (°C)	Package	Status
P6SMB11AT3	onsemi	9.4	10.5	15.6	38	600	-65 to 150	DO-214AA, SMB	Obsolete
P6SMB11A	Eaton - Electronics Division	9.4	10.5	15.6	39.1	600	-55 to 150	DO-214AA, SMB	Active
1KSMB11A	Taiwan Semiconductor Corporation	9.4	10.5	15.6	64.1	1000	-55 to 175	DO-214AA, SMB	Active
SM6T10A	STMicroelectronics	8.55	9.5	18.6	215 (8/20µs)	600	-55 to 150	DO-214AA, SMB	Active
SM6T12A	STMicroelectronics	10.2	11.4	21.7	184 (8/20µs)	600	-55 to 150	DO-214AA, SMB	Active
SMBJ9.0A	Taiwan Semiconductor Corporation	9.0	10.0	15.4	40	600	-55 to 150	DO-214AA, SMB	Active
SMBJP6KE11A-TP	Micro Commercial Co	9.4	10.5	15.6	39.1	600	-55 to 175	DO-214AA, SMB	Active

Engineering Selection Recommendations

Primary Substitutes (Direct Equivalents)

P6SMB11A (Eaton - Electronics Division) and SMBJP6KE11A-TP (Micro Commercial Co) are direct functional equivalents with matching voltage ratings (9.4V standoff, 10.5V breakdown, 15.6V clamping) and compatible current ratings (39.1A). Both are active products with RoHS3 compliance. P6SMB11A operates over -55°C to 150°C; SMBJP6KE11A-TP extends to -55°C to 175°C. Both are available in DO-214AA (SMB) packaging.

1KSMB11A (Taiwan Semiconductor Corporation) matches all voltage specifications with enhanced current handling (64.1A) and power dissipation (1000W). Operating temperature range extends to 175°C. This part provides higher performance margins and is suitable for applications requiring increased transient current capacity.

Secondary Alternatives (Similar Performance)

SMBJ9.0A (Taiwan Semiconductor Corporation) provides near-equivalent voltage ratings (9.0V standoff, 10.0V breakdown, 15.4V clamping) with 40A peak pulse current. Voltage parameters are within acceptable tolerance for most applications requiring 9.4V protection.

SM6T10A and SM6T12A (STMicroelectronics) operate at different voltage ratings (8.55V and 10.2V standoff respectively) and are suitable only for applications where the lower or higher voltage thresholds are acceptable. These parts feature significantly higher peak pulse current ratings (215A and 184A respectively at 8/20µs pulse duration) and are appropriate for high-energy transient environments.

Compliance Considerations

All active substitute parts carry RoHS3 compliance certification. The original P6SMB11AT3 is RoHS non-compliant. Selection of RoHS-compliant alternatives supports regulatory requirements for new designs and manufacturing processes.

Frequently Asked Questions (FAQ)

Q: Can P6SMB11A be used as a direct replacement for P6SMB11AT3?

A: Yes. P6SMB11A matches all critical voltage parameters (9.4V standoff, 10.5V breakdown, 15.6V clamping) and current rating (39.1A). The operating temperature range is -55°C to 150°C compared to the original -65°C to 150°C. For applications operating above -55°C, this substitution is functionally equivalent. Both use DO-214AA (SMB) packaging.

Q: What is the difference between direct equivalents and similar alternatives?

A: Direct equivalents (P6SMB11A, SMBJP6KE11A-TP, 1KSMB11A) maintain the exact voltage ratings of the original part (9.4V standoff, 10.5V breakdown, 15.6V clamping). Similar alternatives (SM6T10A, SM6T12A, SMBJ9.0A) operate at different voltage thresholds and are suitable only when the application can tolerate the voltage deviation.

Q: Is 1KSMB11A suitable for all applications using P6SMB11AT3?

A: 1KSMB11A matches all voltage specifications with enhanced current capacity (64.1A vs. 38A) and power dissipation (1000W vs. 600W). The higher performance margins make it suitable for applications requiring increased transient protection. Operating temperature extends to 175°C. Verify that the enhanced specifications do not introduce unintended circuit behavior in sensitive applications.

Q: Are all substitute parts available in the same package?

A: Yes. All listed substitute parts use the DO-214AA (SMB) surface mount package, ensuring mechanical and electrical compatibility with existing PCB layouts designed for the P6SMB11AT3.

Q: What is the impact of RoHS compliance on part selection?

A: The original P6SMB11AT3 is RoHS non-compliant. All active substitute parts (P6SMB11A, 1KSMB11A, SM6T10A, SM6T12A, SMBJ9.0A, SMBJP6KE11A-TP) carry RoHS3 compliance certification. For new designs and manufacturing processes subject to RoHS regulations, selection of compliant alternatives is required.

Q: Can SM6T10A or SM6T12A replace P6SMB11AT3 in existing designs?

A: SM6T10A and SM6T12A operate at different voltage thresholds (8.55V and 10.2V standoff respectively) compared to the original 9.4V. These parts are suitable only for applications where the voltage deviation is acceptable. Both offer significantly higher peak pulse current ratings (215A and 184A at 8/20µs) and are appropriate for high-energy transient environments where the voltage tolerance permits their use.

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