P6SMB82CAT3G Equivalent & Substitute Parts

Part Overview

The P6SMB82CAT3G is a transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc. in the P6SMB series. This surface mount component operates at 70.1V reverse standoff with a 113V maximum clamping voltage and 5.3A peak pulse current. The part is classified 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)	70.1V
Voltage - Breakdown (Min)	77.9V
Voltage - Clamping (Max) @ Ipp	113V
Current - Peak Pulse (10/1000µs)	5.3A
Power - Peak Pulse	600W
Package / Case	DO-214AA, SMB
Mounting Type	Surface Mount
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 eligibility for the P6SMB82CAT3G is determined by the following critical parameters:

Voltage - Reverse Standoff: 70V to 70.1V (±0.1V tolerance acceptable)
Voltage - Clamping (Max) @ Ipp: 113V (exact match required)
Current - Peak Pulse: 5.3A minimum (higher values acceptable for enhanced performance margin)
Power - Peak Pulse: 600W minimum (higher values acceptable)
Package / Case: DO-214AA or SMB (mechanically and electrically equivalent)
Mounting Type: Surface Mount (required for PCB compatibility)
Type: Zener (bidirectional TVS diode)
Bidirectional Channels: 1 (single channel configuration)

All substitute parts listed below meet these core electrical and mechanical requirements. Parts with higher peak pulse current ratings or power dissipation capabilities provide enhanced transient protection margins while maintaining full backward compatibility.

Parameter Comparison

Part Number	Manufacturer	VWM (Typ)	VBR (Min)	VC (Max)	Ipp (A)	Power (W)	Package	Status
P6SMB82CAT3G	Littelfuse Inc.	70.1V	77.9V	113V	5.3A	600W	DO-214AA, SMB	Obsolete
P6SMB82CA	Eaton - Electronics Division	70.1V	77.9V	113V	5.4A	600W	DO-214AA, SMB	Active
1KSMB82CA	Taiwan Semiconductor Corporation	70.1V	77.9V	113V	8.8A	1000W	DO-214AA, SMB	Active
SMBJ70CA	Semtech Corporation	70V	77.8V	113V	5.3A	600W	DO-214AA, SMB	Active
SMBJ70CA-TR	STMicroelectronics	70V	77.8V	113V	5.5A	600W	DO-214AA, SMB	Active
SMBJ70CAE3/TR13	Microchip Technology	70V	77.8V	113V	5.3A	600W	DO-214AA, SMB	Active
SMBJP6KE82CA-TP	Micro Commercial Co	70.1V	77.9V	113V	5.4A	600W	DO-214AA, SMB	Active
P6SMB82CA-E3/5B	Vishay General Semiconductor - Diodes Division	70.1V	77.9V	113V	5.3A	600W	DO-214AA, SMB	Active
TVP06B820CA-G	Comchip Technology	—	—	—	—	600W	DO-214AA, SMB	Active

Engineering Selection Recommendations

Primary Recommendation: P6SMB82CA (Eaton - Electronics Division)

This part provides direct electrical equivalence with 70.1V reverse standoff and 113V clamping voltage. Active product status ensures long-term availability and supply chain stability. RoHS compliance and ROHS3 certification align with current manufacturing standards. Tape & Reel packaging supports automated assembly processes.

Secondary Recommendation: SMBJ70CA (Semtech Corporation)

Meets all core electrical parameters with 70V reverse standoff (0.1V variance within tolerance) and identical 113V clamping voltage. Active status with 10,200 units in stock provides supply security. Extended operating temperature range to 175°C offers thermal margin advantage. Suitable for applications requiring enhanced temperature performance.

Enhanced Performance Option: 1KSMB82CA (Taiwan Semiconductor Corporation)

Delivers superior transient protection with 8.8A peak pulse current and 1000W power dissipation (67% higher than baseline). Maintains identical voltage parameters. Active status with 30,100 units in stock. Recommended for applications with higher transient stress or where additional protection margin is required.

Alternative Sources:

SMBJ70CA-TR (STMicroelectronics), SMBJ70CAE3/TR13 (Microchip Technology), SMBJP6KE82CA-TP (Micro Commercial Co), and P6SMB82CA-E3/5B (Vishay) all provide equivalent electrical performance with active product status. Selection among these alternatives may be based on supply availability, preferred supplier relationships, or specific packaging requirements.

Not Recommended: TVP06B820CA-G (Comchip Technology)

Insufficient electrical parameter data provided. Voltage and current specifications are not documented, preventing verification of substitution compatibility.

Frequently Asked Questions (FAQ)

Q: Can I use a substitute part with higher peak pulse current (Ipp) than the original P6SMB82CAT3G?

A: Yes. Higher Ipp ratings (such as 8.8A in the 1KSMB82CA) provide enhanced transient suppression capability while maintaining full backward compatibility. The circuit will experience improved protection margins without adverse effects.

Q: Are all substitute parts pin-compatible with the P6SMB82CAT3G?

A: Yes. All listed substitutes use the DO-214AA (SMB) package with identical pin configuration and footprint. Direct PCB replacement is possible without layout modifications.

Q: What is the significance of the 0.1V difference in reverse standoff voltage between P6SMB82CA (70.1V) and SMBJ70CA (70V)?

A: This 0.1V variance falls within normal manufacturing tolerance for TVS diodes and does not affect circuit performance or protection characteristics. Both parts are electrically equivalent for this application.

Q: Does operating temperature range affect substitution eligibility?

A: Operating temperature range does not disqualify substitution. Parts with extended ranges (such as SMBJ70CA at -55°C to 175°C versus the original -65°C to 150°C) provide additional thermal margin. Parts with narrower ranges remain fully compatible if the application operates within their specified limits.

Q: Why is the 1KSMB82CA rated at 1000W instead of 600W?

A: The 1KSMB82CA uses enhanced internal construction to dissipate higher transient energy. This higher power rating does not change the voltage clamping behavior and provides additional protection margin for high-stress applications. It is a direct functional upgrade.

Q: Can I mix different substitute parts in the same circuit board?

A: Yes. All substitute parts meet identical electrical specifications for voltage clamping and breakdown characteristics. Mixing different manufacturers or part numbers in the same design is acceptable from an electrical standpoint.

Q: What packaging format should I specify for automated assembly?

A: Specify Tape & Reel (TR) packaging for all substitute parts to ensure compatibility with pick-and-place assembly equipment. All recommended alternatives are available in TR format.

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