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P6SMB33A
NextGen Components
TVS Diode 600W 33V UNI SMB
17115 Pcs New Original In Stock
45.7V Clamp Ipp Tvs Diode Surface Mount SMB (DO-214AA)
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5.0 / 5.0
- (360 Ratings)
P6SMB33A
Product Overview
2056755
DiGi Electronics Part Number
P6SMB33A-DGManufacturer
NextGen Components
P6SMB33A
Description
TVS Diode 600W 33V UNI SMBInventory
17115 Pcs New Original In Stock
45.7V Clamp Ipp Tvs Diode Surface Mount SMB (DO-214AA)
Quantity
Minimum 1
Minimum 1
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P6SMB33A Technical Specifications
Category
Transient Voltage Suppressors (TVS), TVS Diodes
Packaging
-
Series
SMB
Product Status
Active
Type
Zener
Unidirectional Channels
1
Voltage - Reverse Standoff (Typ)
28.2V
Voltage - Breakdown (Min)
31.4V
Voltage - Clamping (Max) @ Ipp
45.7V
Power - Peak Pulse
600W
Power Line Protection
No
Applications
General Purpose
Operating Temperature
-65°C ~ 150°C (TJ)
Mounting Type
Surface Mount
Package / Case
DO-214AA, SMB
Supplier Device Package
SMB (DO-214AA)
Datasheet & Documents
HTML Datasheet
P6SMB33A-DG
Environmental & Export Classification
RoHS Status
RoHS Compliant
Moisture Sensitivity Level (MSL)
1 (Unlimited)
REACH Status
REACH Unaffected
ECCN
EAR99
HTSUS
8541.10.0080
Additional Information
Other Names
3372-P6SMB33ATR
Standard Package
6,000
Reviews
5.0/5.0-(Show up to 5 Ratings)
Dec 02, 2025
Every time I order, they ship immediately and provide excellent assistance.
Dec 02, 2025
Fast response times during customer service inquiries showed excellent support.
Dec 02, 2025
Affordable and reliable, I always find what I need here.
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Frequently Asked Questions (FAQ)
Can the P6SMB33A be used for reliable overvoltage protection in automotive 12V systems with high-temperature environments, and what design margins should be considered?
Yes, the P6SMB33A is suitable for overvoltage protection in automotive 12V systems, but careful margining is required. The device has a reverse standoff voltage of 28.2V, which accommodates normal 12V system transients like load dump (typically up to 40V). However, since the P6SMB33A clamps at 45.7V max, ensure downstream components can tolerate this clamping voltage briefly. Designers should verify thermal performance under repeated surge events, especially near the 150°C max junction temperature. Include PCB copper pour for heatsinking and derate peak pulse power above 85°C to ensure long-term reliability in underhood applications.
What are the risks of using P6SMB33A as a drop-in replacement for SMAJ33A in an existing power supply design?
Replacing SMAJ33A with P6SMB33A introduces packaging and power dissipation risks—both are 33V unidirectional TVS diodes in similar voltage ranges, but the SMAJ33A is in DO-214AC (SMA) while P6SMB33A uses DO-214AA (SMB), resulting in lower thermal mass. The SMB package has reduced PCB heat dissipation capability compared to SMA, increasing thermal stress during high-energy transients. Additionally, P6SMB33A’s 600W peak pulse rating is lower than SMAJ33A’s 400W, but pulse duration and waveform matter—validate under actual surge conditions (e.g., IEC 61000-4-2) and ensure layout allows sufficient creepage and thermal relief to avoid premature failure.
How does the clamping performance of P6SMB33A impact sensitive ICs during fast ESD events in industrial control circuits?
The P6SMB33A clamps at 45.7V max during peak pulse current, which may be too high for modern low-voltage ICs like microcontrollers or sensors rated for 36V max. In industrial controls with fast ESD transients (e.g., IEC 61000-4-2 Level 4), the diode’s response time is sufficient but post-clamp voltage could damage sensitive nodes. To mitigate risk, place P6SMB33A at system entry points (connector-level protection) and pair with secondary protection (e.g., low-capacitance ESD diodes like ESDA6V1-5) near ICs. Also, minimize PCB trace inductance to ensure fast activation and reduce voltage overshoot.
What are the derating requirements for P6SMB33A when used in 24V industrial power rails exposed to lightning-induced surges?
When protecting 24V industrial power rails from lightning-induced transients (e.g., IEEE C62.41), the P6SMB33A must be derated due to its 600W peak pulse capability. These surges can exceed 1kW over 10/1000μs waveforms, risking thermal overload. Use the P6SMB33A in conjunction with current-limiting elements like PTCs or series inductors to reduce let-through energy. Additionally, apply full power derating above 85°C ambient—derate linearly to 50% at 125°C ambient when mounted on standard FR-4 with minimal copper. For sustained threat environments, consider higher-power alternatives like 1.5KE33A in DO-15, though with larger footprint.
Can P6SMB33A be paralleled to increase surge current handling in high-exposure telecom applications, and what are the failure risks?
Paralleling P6SMB33A devices is not recommended for increasing surge capacity due to mismatched dynamic impedance and clamping characteristics. Even minor variations in breakdown voltage (31.4V min) can cause one diode to conduct first, absorbing disproportionate energy and failing prematurely, potentially leading to cascading failure. Instead, use a single higher-rated device like P6KE33A (5000W, DO-15) for telecom line protection. If redundancy is critical, implement a staged protection scheme with upstream gas discharge tube or spark gap to limit energy before it reaches the P6SMB33A, ensuring robust and predictable clamping behavior.
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P6SMB33A CAD Models
NextGen Components P6SMB33A PCB symbols & footprints
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