P6SMB47CAT3 Equivalent & Substitute Parts

Part Overview

The P6SMB47CAT3 is a transient voltage suppressor (TVS) diode manufactured by onsemi, designed for surface mount applications in the DO-214AA (SMB) package. This component provides 40.2V reverse standoff voltage with 64.8V clamping capability and 9.3A peak pulse current rating. The part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value
Voltage - Reverse Standoff (Typ)	40.2V
Voltage - Breakdown (Min)	44.7V
Voltage - Clamping (Max) @ Ipp	64.8V
Current - Peak Pulse (10/1000µs)	9.3A
Power - Peak Pulse	600W
Package / Case	DO-214AA, SMB
Operating Temperature	-65°C ~ 150°C (TJ)
Type	Zener
Bidirectional Channels	1
Mounting Type	Surface Mount

Substitute Part Grouping Explanation

Substitution for the P6SMB47CAT3 is determined by the following critical parameters:

Voltage - Reverse Standoff: 40.2V (±tolerance)
Voltage - Clamping (Max) @ Ipp: 64.8V (±tolerance)
Current - Peak Pulse: minimum 9.3A
Package / Case: DO-214AA or SMB equivalent
Mounting Type: Surface Mount
Bidirectional Channels: 1

Substitute parts are grouped into two categories:

Direct Equivalents: Parts with identical or near-identical electrical specifications (40.2V standoff, 64.8V clamping, 9.3A–9.4A peak pulse). These provide pin-for-pin and functional compatibility.

Similar Alternatives: Parts with comparable voltage ratings (40V–40.2V standoff, 64.5V–64.8V clamping) and equivalent or higher current ratings (9.3A or greater). These maintain circuit protection performance within the same application envelope but may have minor specification variations.

Parameter Comparison

Part Number	Manufacturer	Voltage - Reverse Standoff (Typ)	Voltage - Clamping (Max) @ Ipp	Current - Peak Pulse (10/1000µs)	Power - Peak Pulse	Package / Case	Operating Temperature	Product Status	RoHS Status
P6SMB47CAT3	onsemi	40.2V	64.8V	9.3A	600W	DO-214AA, SMB	-65°C ~ 150°C	Obsolete	RoHS non-compliant
P6SMB47CA	Eaton - Electronics Division	40.2V	64.8V	9.4A	600W	DO-214AA, SMB	-55°C ~ 150°C	Active	RoHS Compliant
1KSMB47CA	Taiwan Semiconductor Corporation	40.2V	64.8V	15.4A	1000W	DO-214AA, SMB	-55°C ~ 175°C	Active	ROHS3 Compliant
P6SMB47CA-M3/52	Vishay General Semiconductor - Diodes Division	40.2V	64.8V	9.3A	600W	DO-214AA, SMB	-65°C ~ 150°C	Active	ROHS3 Compliant
P6SMB47CA-M3/5B	Vishay General Semiconductor - Diodes Division	40.2V	64.8V	9.3A	600W	DO-214AA, SMB	-65°C ~ 150°C	Active	ROHS3 Compliant
SMBJ40CA	MDD	40V	64.5V	9.3A	600W	DO-214AA, SMB	-50°C ~ 150°C	Active	ROHS3 Compliant
SMBJ40CA-TR	STMicroelectronics	40V	64.5V	9.7A	600W	DO-214AA, SMB	-55°C ~ 150°C	Active	ROHS3 Compliant
SMBJP6KE47CA-TP	Micro Commercial Co	40.2V	64.8V	9.4A	600W	DO-214AA, SMB	-55°C ~ 175°C	Active	ROHS3 Compliant
TPSMB47CA	Littelfuse Inc.	40.2V	64.8V	9.4A	600W	DO-214AA, SMB	-65°C ~ 175°C	Active	ROHS3 Compliant
TVP06B470CA-G	Comchip Technology	Not specified	Not specified	Not specified	600W	DO-214AA, SMB	-55°C ~ 150°C	Active	ROHS3 Compliant

Engineering Selection Recommendations

Preferred Direct Equivalents:

P6SMB47CA (Eaton) and SMBJP6KE47CA-TP (Micro Commercial Co) provide the closest electrical match to the P6SMB47CAT3 with 40.2V standoff, 64.8V clamping, and 9.3A–9.4A peak pulse current. Both are active products with RoHS3 compliance, making them suitable for new designs and ongoing production support.

Automotive-Grade Alternative:

TPSMB47CA (Littelfuse Inc.) is qualified to AEC-Q101 and offers identical voltage specifications with extended operating temperature range (-65°C ~ 175°C). This part is recommended for automotive applications requiring automotive-grade components.

Higher Current Capacity Alternative:

1KSMB47CA (Taiwan Semiconductor Corporation) provides 15.4A peak pulse current and 1000W power rating, offering enhanced transient protection margin. This part is suitable for applications requiring higher surge current handling while maintaining the same voltage protection envelope.

Similar Voltage Rating Alternatives:

SMBJ40CA (MDD) and SMBJ40CA-TR (STMicroelectronics) operate at 40V standoff with 64.5V clamping, representing a minor voltage deviation (0.2V lower standoff, 0.3V lower clamping). These parts are acceptable for applications with relaxed voltage tolerance requirements and are available in high inventory quantities.

Compliance Consideration:

The original P6SMB47CAT3 is RoHS non-compliant. All active substitute parts listed are RoHS3 compliant, meeting current regulatory requirements for new designs and procurement.

Frequently Asked Questions (FAQ)

Q: Can I use SMBJ40CA-TR as a direct replacement for P6SMB47CAT3?

A: SMBJ40CA-TR is functionally compatible with a minor voltage specification difference. The 40V standoff (versus 40.2V) and 64.5V clamping (versus 64.8V) represent a 0.2V–0.3V reduction. For applications with standard tolerance margins, this substitution is acceptable. Verify circuit requirements before implementation.

Q: What is the difference between P6SMB47CA and SMBJP6KE47CA-TP?

A: Both parts share identical voltage specifications (40.2V standoff, 64.8V clamping) and equivalent current ratings (9.4A). The primary differences are manufacturer (Eaton versus Micro Commercial Co) and packaging format (Cut Tape & Digi-Reel versus Tape & Reel). Electrical performance is equivalent.

Q: Is 1KSMB47CA suitable for my application if the original design used P6SMB47CAT3?

A: Yes, 1KSMB47CA is a compatible substitute with enhanced specifications. It maintains the same voltage protection envelope (40.2V standoff, 64.8V clamping) while providing higher current capacity (15.4A versus 9.3A) and power rating (1000W versus 600W). This part offers improved transient protection margin and is recommended for applications requiring higher surge current handling.

Q: Why is the operating temperature range different across substitute parts?

A: Operating temperature range varies by manufacturer design and qualification level. The P6SMB47CAT3 operates -65°C ~ 150°C. Substitute parts range from -50°C ~ 175°C depending on manufacturer. Verify that the selected substitute meets your application's temperature requirements.

Q: Are all substitute parts RoHS compliant?

A: All active substitute parts listed are RoHS3 compliant. The original P6SMB47CAT3 is RoHS non-compliant. For new designs and procurement, RoHS3 compliant alternatives are required to meet current regulatory standards.

Q: Can I interchange P6SMB47CA-M3/52 and P6SMB47CA-M3/5B?

A: Yes, both Vishay parts are electrically identical with matching voltage specifications (40.2V standoff, 64.8V clamping, 9.3A peak pulse). The designation suffix (-M3/52 versus -M3/5B) indicates different packaging or tape configuration. Verify packaging compatibility with your assembly process before substitution.

Q: What should I consider when selecting between multiple substitute options?

A: Prioritize based on: (1) voltage specification match (40.2V standoff preferred), (2) current rating adequacy (minimum 9.3A), (3) product status (active preferred over obsolete), (4) RoHS compliance (required for new designs), (5) operating temperature range (verify application requirements), and (6) availability and lead time.

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