P6SMB47CAT3G Equivalent & Substitute Parts

Part Overview

The P6SMB47CAT3G is a transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection in surface mount applications. This component features a 40.2V reverse standoff voltage with 64.8V clamping capability and 9.3A peak pulse current handling. The part is currently listed as obsolete, necessitating identification of active equivalent alternatives that maintain electrical and mechanical compatibility for continued system support and new designs.

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 Range	-65°C ~ 150°C (TJ)
Type	Zener
Bidirectional Channels	1
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the P6SMB47CAT3G is determined by strict equivalence across the following electrical and mechanical parameters:

Voltage - Reverse Standoff (Typ): 40.2V
Voltage - Breakdown (Min): 44.7V
Voltage - Clamping (Max) @ Ipp: 64.8V
Package / Case: DO-214AA, SMB
Bidirectional Channels: 1
Type: Zener

Substitute parts must maintain these core electrical specifications to ensure functional compatibility in the circuit. Package compatibility (DO-214AA/SMB form factor) is mandatory for PCB layout and assembly. Peak pulse current ratings may vary within acceptable ranges (9.3A to 15.4A) provided the clamping voltage and standoff voltage remain within specification. Operating temperature range and power dissipation characteristics are secondary considerations that may differ between substitutes while maintaining primary electrical function.

Parameter Comparison

Part Number	Manufacturer	Voltage - Reverse Standoff (Typ)	Voltage - Breakdown (Min)	Voltage - Clamping (Max) @ Ipp	Current - Peak Pulse (10/1000µs)	Power - Peak Pulse	Package / Case	Operating Temperature	Product Status
P6SMB47CAT3G	Littelfuse Inc.	40.2V	44.7V	64.8V	9.3A	600W	DO-214AA, SMB	-65°C ~ 150°C	Obsolete
1KSMB47CA	Taiwan Semiconductor Corporation	40.2V	44.7V	64.8V	15.4A	1000W	DO-214AA, SMB	-55°C ~ 175°C	Active
P6SMB47CA	Eaton - Electronics Division	40.2V	44.7V	64.8V	9.4A	600W	DO-214AA, SMB	-55°C ~ 150°C	Active
TPSMB47CA	Littelfuse Inc.	40.2V	44.7V	64.8V	9.4A	600W	DO-214AA, SMB	-65°C ~ 175°C	Active
P6SMB47CA-E3/5B	Vishay General Semiconductor - Diodes Division	40.2V	44.7V	64.8V	9.3A	600W	DO-214AA, SMB	-65°C ~ 150°C	Active
P6SMB47CA-M3/52	Vishay General Semiconductor - Diodes Division	40.2V	44.7V	64.8V	9.3A	600W	DO-214AA, SMB	-65°C ~ 150°C	Active
P6SMB47CA-M3/5B	Vishay General Semiconductor - Diodes Division	40.2V	44.7V	64.8V	9.3A	600W	DO-214AA, SMB	-65°C ~ 150°C	Active
SMBJP6KE47CA-TP	Micro Commercial Co	40.2V	44.7V	64.8V	9.4A	600W	DO-214AA, SMB	-55°C ~ 175°C	Active

Engineering Selection Recommendations

All listed substitute parts maintain electrical equivalence to the P6SMB47CAT3G across the critical parameters of reverse standoff voltage (40.2V), breakdown voltage (44.7V), and clamping voltage (64.8V). Selection among active alternatives should prioritize the following factors:

Product Status and Availability: All substitute parts listed are in active production status, ensuring long-term availability and supply chain stability compared to the obsolete P6SMB47CAT3G.

Compliance and Certification: All substitute parts maintain ROHS3 compliance and REACH unaffected status, consistent with the original part. The TPSMB47CA variant includes AEC-Q101 automotive qualification, suitable for applications requiring automotive-grade reliability.

Thermal Operating Range: The P6SMB47CA-E3/5B, P6SMB47CA-M3/52, and P6SMB47CA-M3/5B variants maintain the original -65°C to 150°C operating range. The TPSMB47CA, 1KSMB47CA, and SMBJP6KE47CA-TP extend the upper temperature limit to 175°C, providing enhanced thermal margin in high-temperature environments.

Peak Pulse Current Capability: The 1KSMB47CA provides enhanced current handling at 15.4A with 1000W peak pulse power, compared to 9.3A and 600W in the original part. This variant offers increased transient protection margin for applications with higher surge current requirements.

Packaging Variants: Vishay variants (P6SMB47CA-E3/5B, P6SMB47CA-M3/52, P6SMB47CA-M3/5B) are available in Tape & Reel or Tape & Box configurations. Eaton P6SMB47CA is supplied in Cut Tape & Digi-Reel format. Selection should align with assembly process requirements and tape reel compatibility.

Frequently Asked Questions (FAQ)

Q: Can the P6SMB47CAT3G be directly replaced with any of the listed substitutes?

A: Yes. All listed substitute parts maintain identical electrical specifications for reverse standoff voltage (40.2V), breakdown voltage (44.7V), and clamping voltage (64.8V). All are packaged in DO-214AA/SMB form factor with single bidirectional channel configuration, ensuring direct PCB compatibility and functional equivalence.

Q: What is the difference between the 1KSMB47CA and other substitutes?

A: The 1KSMB47CA is rated for 15.4A peak pulse current and 1000W peak pulse power, compared to 9.3-9.4A and 600W in other substitutes. This higher current rating provides increased transient suppression capability. The 1KSMB47CA also extends the operating temperature range to -55°C to 175°C.

Q: Are the Vishay P6SMB47CA variants interchangeable?

A: The P6SMB47CA-E3/5B, P6SMB47CA-M3/52, and P6SMB47CA-M3/5B are electrically identical with matching 40.2V standoff, 44.7V breakdown, and 64.8V clamping specifications. Differences are in packaging format (Tape & Reel versus Tape & Box) and suffix designations. Selection depends on assembly equipment compatibility and tape reel specifications.

Q: Does the TPSMB47CA automotive qualification affect its use in non-automotive applications?

A: No. The TPSMB47CA meets AEC-Q101 automotive qualification standards, which represent stringent reliability requirements. This part is fully suitable for general-purpose applications and provides equivalent or superior reliability compared to non-automotive qualified alternatives.

Q: What packaging formats are available among the substitutes?

A: Substitutes are supplied in three packaging formats: Tape & Reel (TR) for high-volume automated assembly, Cut Tape (CT) & Digi-Reel for moderate volumes, and Tape & Box (TB) for lower volumes. All maintain the DO-214AA/SMB physical form factor compatible with standard surface mount assembly processes.

Q: Can I use the 1KSMB47CA in place of the P6SMB47CAT3G if my circuit only requires 9.3A protection?

A: Yes. The 1KSMB47CA maintains the same 40.2V standoff and 64.8V clamping specifications. The higher 15.4A current rating does not degrade performance in circuits requiring lower current protection; it simply provides additional margin and is fully backward compatible.

Q: Are all substitutes RoHS compliant?

A: Yes. All listed substitute parts are ROHS3 compliant and REACH unaffected, maintaining environmental compliance equivalent to the original P6SMB47CAT3G.

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