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P4SMA82A
NextGen Components
TVS Diode 400W 82V UNI SMA
300122 Pcs New Original In Stock
113V Clamp Ipp Tvs Diode Surface Mount DO-214AC, SMA
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5.0 / 5.0
- (244 Ratings)
P4SMA82A
Product Overview
2053455
DiGi Electronics Part Number
P4SMA82A-DGManufacturer
NextGen Components
P4SMA82A
Description
TVS Diode 400W 82V UNI SMAInventory
300122 Pcs New Original In Stock
113V Clamp Ipp Tvs Diode Surface Mount DO-214AC, SMA
Quantity
Minimum 1
Minimum 1
Purchase and inquiry
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P4SMA82A Technical Specifications
Category
Transient Voltage Suppressors (TVS), TVS Diodes
Packaging
Tape & Reel (TR)
Series
SMA
Product Status
Active
Type
Zener
Unidirectional Channels
1
Voltage - Reverse Standoff (Typ)
70.1V
Voltage - Breakdown (Min)
77.9V
Voltage - Clamping (Max) @ Ipp
113V
Power - Peak Pulse
400W
Power Line Protection
No
Applications
General Purpose
Operating Temperature
-50°C ~ 150°C (TJ)
Mounting Type
Surface Mount
Package / Case
DO-214AC, SMA
Supplier Device Package
DO-214AC, SMA
Datasheet & Documents
HTML Datasheet
P4SMA82A-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-P4SMA82ATR
Standard Package
5,000
Reviews
5.0/5.0-(Show up to 5 Ratings)
Dec 02, 2025
문의에 대해 세심하게 답변해주셔서 쇼핑하는 동안 큰 불편이 없었어요. 배송도 신속했어요.
Dec 02, 2025
물류 프로세스가 체계적이어서 제품이 손상 없이 정시 도착했습니다.
Dec 02, 2025
商品到着も早く、アフターサポートも充実していて安心して取引できました。
Dec 02, 2025
Very pleased with the long-term reliability of their offerings.
Dec 02, 2025
Their careful packaging practices highlight their respect for customer satisfaction.
Dec 02, 2025
Their delivery punctuality allows me to coordinate multiple project stages seamlessly.
Dec 02, 2025
I appreciated the quick resolution of my post-purchase inquiry, which was handled professionally.
Dec 02, 2025
I'm impressed by how dependable Di Digi Electronics hardware is—great quality at a reasonable price.
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Frequently Asked Questions (FAQ)
When designing in the P4SMA82A for overvoltage protection in a 70V rail, how close can the reverse standoff voltage operate to the normal circuit voltage before leakage current becomes a reliability concern?
The P4SMA82A has a typical reverse standoff voltage of 70.1V, which closely aligns with your 70V rail. While this is within specification, operating this close increases quiescent leakage current, especially at elevated temperatures. In real-world conditions above 85°C, leakage can rise significantly—potentially causing power loss or false triggering in sensitive circuits. For reliable long-term operation, engineers should ensure the normal operating voltage stays below 90% of the rated standoff voltage (i.e., ≤63V) or verify acceptable leakage through application-specific thermal testing. If your design regularly operates near 70V, consider the P4SMA75A (64.4V standoff) for better margin or use a series resistor to limit leakage effects.
Can the P4SMA82A replace the Littelfuse SMAJ85A in a 400W transient protection circuit, and what are the key clamping and breakdown differences that affect surge performance?
While both the P4SMA82A and SMAJ85A are 400W unidirectional TVS diodes in SMA packages, direct replacement requires caution. The P4SMA82A has a minimum breakdown voltage of 77.9V vs. 78.9V for the SMAJ85A, and a maximum clamping voltage of 113V compared to the SMAJ85A's 119.5V. This means the P4SMA82A triggers earlier but clamps tighter under Ipp, offering better protection for downstream components like controllers or transceivers on an 80V line. However, verify that the lower standoff voltage (70.1V vs. 72.5V on SMAJ85A) won’t induce leakage in your system. The P4SMA82A is a viable, potentially improved alternative if your operating voltage is stable and thermal conditions are controlled.
What PCB layout practices should be followed when integrating the P4SMA82A to ensure it effectively handles high-energy transients without thermal damage?
To maximize the transient-handling capability of the P4SMA82A and avoid localized heating or solder reflow during ESD or surge events, engineers must minimize trace inductance and resistance between the TVS and protected line. Use short, wide traces (≥20 mil) directly connecting the P4SMA82A to the threat source and ground. Avoid vias in the current path, and connect to a low-impedance ground plane using multiple vias near the cathode. Additionally, ensure the pad design follows the DO-214AC footprint with adequate copper to dissipate heat—especially critical since the P4SMA82A can clamp at 113V during 400W pulses. Poor layout can cause the diode to underperform or fail prematurely despite being correctly specified.
How does the P4SMA82A perform in automotive environments with wide temperature swings, and is derating required for peak pulse power at the upper end of its 150°C junction rating?
The P4SMA82A is rated for -50°C to 150°C junction operation, making it suitable for harsh automotive underhood applications. However, at elevated TJ near 150°C, the peak pulse power capability must be derated—as per industry standards, 400W is specified at 25°C. Most SMA-packaged TVS diodes derate linearly above 75°C; without manufacturer-specific curves, assume a 20–30% power reduction at 150°C. To maintain reliability in high-temperature environments, reduce the expected surge duty cycle or improve heatsinking via PCB copper. Monitor actual TJ using thermal simulation or measurement during surge testing to avoid thermal runaway.
Is the P4SMA82A suitable for protecting low-current signal lines, or is its 400W rating and high clamping voltage a risk for sensitive downstream ICs?
Despite its 400W rating, the P4SMA82A can protect low-current lines if the threat is high-energy (e.g., nearby inductive switching or ESD), but caution is required. Its 113V clamping voltage at Ipp is quite high for low-voltage ICs like microcontrollers or sensors rated under 100V. Using the P4SMA82A in such cases may clamp above the IC’s maximum rating, risking damage. Evaluate the threat profile: for ESD-only protection, a lower-capacitance, lower-clamping TVS like the SP0503BAHTN or PESD5V0S1BA is safer. Reserve the P4SMA82A for robust power or control lines where 82V standoff and 113V clamping are acceptable, and always pair it with current-limiting resistors when interfacing sensitive logic.
Quality Assurance (QC)
DiGi ensures the quality and authenticity of every electronic component through professional inspections and batch sampling, guaranteeing reliable sourcing, stable performance, and compliance with technical specifications, helping customers reduce supply chain risks and confidently use components in production.
P4SMA82A CAD Models
NextGen Components P4SMA82A PCB symbols & footprints
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