P6SMB12CAT3 Equivalent & Substitute Parts

Part Overview

The P6SMB12CAT3 is a bidirectional transient voltage suppressor (TVS) diode manufactured by onsemi, rated for 600W peak pulse power at 12V. This component is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The part is housed in a DO-214AA (SMB) surface mount package and is RoHS non-compliant with unlimited moisture sensitivity rating.

Substiute Parts

P6SMB12CAT3

onsemiIn Stock: 1009P6SMB12CAT3 Datasheet

Current PartRFQ

P6SMB12CA

Good-Ark SemiconductorIn Stock: 9465P6SMB12CA Datasheet

DirectRFQ

SM6T12CA

STMicroelectronicsIn Stock: 20457SM6T12CA Datasheet

SimilarRFQ

SMBJ10CA

MDDIn Stock: 443130SMBJ10CA Datasheet

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SMBJ10CA

MDDIn Stock: 443130SMBJ10CA Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the P6SMB12CAT3 are qualified based on the following electrical and mechanical parameters:

• Package Compatibility: All substitutes must use DO-214AA (SMB) surface mount package for direct PCB footprint compatibility
• Power Rating: Peak pulse power must equal 600W to maintain circuit protection performance
• Voltage Class: Reverse standoff voltage and breakdown voltage must fall within the 10–12V range to ensure proper clamping behavior in the target application
• Bidirectional Operation: All substitutes must be bidirectional TVS diodes with single channel configuration
• Mounting Type: Surface mount technology required for automated assembly compatibility
• Operating Temperature Range: Must support industrial temperature range of at least -55°C to 150°C

The following active production parts meet these substitution criteria:

1. P6SMB12CA (Good-Ark Semiconductor) – Direct voltage and power rating match
2. SM6T12CA (STMicroelectronics) – Equivalent voltage class with active product status
3. SMBJ10CA (MDD) – Compatible voltage class with high inventory availability

Parameter Comparison

Engineering Selection Recommendations

P6SMB12CA (Good-Ark Semiconductor) is the primary substitute for direct replacement. This part maintains identical power rating (600W) and nominal voltage class (12V) with matching reverse standoff voltage (10.2V) and breakdown voltage (11.4V). The part is in active production status with ROHS3 compliance, addressing the obsolescence of the original component.

SM6T12CA (STMicroelectronics) is an alternative substitute with equivalent voltage class specifications. This part carries ROHS3 compliance and active product status. The higher peak pulse current rating (184A at 8/20µs) and clamping voltage (21.7V) indicate different transient response characteristics but maintain the same 600W power rating and DO-214AA package footprint.

SMBJ10CA (MDD) is a compatible substitute with slightly lower voltage ratings (10V reverse standoff, 11V breakdown). This part is in active production with ROHS3 compliance and offers the highest inventory availability (443,100 pcs). The operating temperature range extends to -50°C minimum, which is acceptable for most industrial applications requiring -55°C operation.

All three substitutes are ROHS3 compliant, addressing regulatory requirements that the original obsolete part does not meet. Selection should be based on specific circuit requirements regarding clamping voltage tolerance and peak pulse current characteristics.

Frequently Asked Questions (FAQ)

Q: Can P6SMB12CA be used as a direct replacement for P6SMB12CAT3?

A: Yes. Both parts share identical 600W power rating, 12V nominal voltage class, and DO-214AA (SMB) package. The P6SMB12CA maintains matching reverse standoff voltage (10.2V) and breakdown voltage (11.4V), making it functionally equivalent for circuit protection applications.

Q: What is the difference between the clamping voltages of the substitute parts?

A: Clamping voltage represents the maximum voltage across the TVS diode during transient suppression. P6SMB12CA clamps at 16.7V, SM6T12CA at 21.7V, and SMBJ10CA at 17V. Lower clamping voltage provides tighter protection but may require higher peak pulse current. Selection depends on the protected circuit's voltage tolerance specifications.

Q: Are all substitute parts RoHS compliant?

A: Yes. All three substitute parts (P6SMB12CA, SM6T12CA, SMBJ10CA) are ROHS3 compliant. The original P6SMB12CAT3 is RoHS non-compliant, making substitution necessary for applications requiring RoHS certification.

Q: Do the substitute parts fit the same PCB footprint?

A: Yes. All substitute parts use the DO-214AA (SMB) surface mount package, which provides identical PCB footprint compatibility. No layout modifications are required for component substitution.

Q: What is the difference in peak pulse current ratings between substitutes?

A: P6SMB12CA and SMBJ10CA have similar peak pulse current ratings (35.9A and 35.3A respectively at 10/1000µs). SM6T12CA has a significantly higher rating (184A at 8/20µs), indicating different pulse waveform specifications. All three maintain the 600W power rating required for the application.

Q: Can SMBJ10CA be used if the circuit requires -55°C minimum operating temperature?

A: SMBJ10CA is rated to -50°C minimum, which is 5°C higher than the -55°C specification. For applications strictly requiring -55°C operation, P6SMB12CA or SM6T12CA are preferred, as both are rated to -55°C.

Q: What inventory status should influence part selection?

A: SM6T12CA has the highest inventory (20,400 pcs), followed by SMBJ10CA (443,100 pcs), and P6SMB12CA (9,400 pcs). Inventory levels may influence lead time and cost considerations but do not affect electrical compatibility.