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P4SMA6.8A
NextGen Components
TVS Diode 400W 6.8V UNI SMA
1830 Pcs New Original In Stock
10.5V Clamp Ipp Tvs Diode Surface Mount DO-214AC, SMA
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5.0 / 5.0
- (166 Ratings)
P4SMA6.8A
Product Overview
2090163
DiGi Electronics Part Number
P4SMA6.8A-DGManufacturer
NextGen Components
P4SMA6.8A
Description
TVS Diode 400W 6.8V UNI SMAInventory
1830 Pcs New Original In Stock
10.5V Clamp Ipp Tvs Diode Surface Mount DO-214AC, SMA
Quantity
Minimum 1
Minimum 1
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P4SMA6.8A Technical Specifications
Category
Transient Voltage Suppressors (TVS), TVS Diodes
Packaging
-
Series
SMA
Product Status
Active
Type
Zener
Unidirectional Channels
1
Voltage - Reverse Standoff (Typ)
5.8V
Voltage - Breakdown (Min)
6.45V
Voltage - Clamping (Max) @ Ipp
10.5V
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
P4SMA6.8A-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-P4SMA6.8ATR
Standard Package
5,000
Reviews
5.0/5.0-(Show up to 5 Ratings)
de desembre 02, 2025
I admire their dedication to producing only high-quality items.
de desembre 02, 2025
The clear pricing policy at DiGi Electronics sets them apart from competitors.
de desembre 02, 2025
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Frequently Asked Questions (FAQ)
What are the key design-in risks when using the P4SMA6.8A for transient protection in a 5V automotive sensor circuit?
When integrating the P4SMA6.8A into a 5V automotive sensor circuit, a critical risk is potential leakage current at the 5.8V reverse standoff voltage, which is close to normal operating voltage. This proximity may allow the TVS to partially conduct under voltage transients or temperature extremes, distorting sensor signals. To mitigate this, ensure system voltage transients (e.g., load dump overshoot) don't exceed 5.8V during normal operation. Consider adding a series resistor to limit leakage impact or opt for a higher standoff TVS like the P4SMA7.5A if available. Also validate performance across the -50°C to 150°C junction temperature range, as leakage increases with temperature in Zener-type TVS diodes like the P4SMA6.8A.
Can the P4SMA6.8A replace the SMAJ6.8A in an existing surge protection design without PCB redesign?
Yes, the P4SMA6.8A can directly replace the SMAJ6.8A without PCB modifications, as both use the DO-214AC (SMA) package with identical footprint and pinout. However, verify that the P4SMA6.8A's 10.5V clamping voltage at peak pulse current is acceptable for downstream components—some SMAJ6.8A variants clamp slightly lower. Also, compare leakage current specifications: the P4SMA6.8A's Zener-type construction may exhibit higher off-state leakage than SMAJ6.8A's avalanche design under high temperature, potentially affecting power-sensitive circuits. Always recheck thermal performance under expected surge events due to slight differences in dynamic resistance.
How does the P4SMA6.8A perform under repetitive ESD strikes in industrial control I/O protection?
The P4SMA6.8A is rated for 400W peak pulse power and is suitable for absorbing repetitive ESD strikes such as those defined in IEC 61000-4-2 (contact discharge up to ±8kV). However, its Zener-type unidirectional design may show gradual degradation if subjected to beyond-specification energy events or high ambient temperatures near 150°C. For industrial I/O applications, ensure PCB layout includes short, low-inductance traces to the TVS to maximize energy shunting. Derate the P4SMA6.8A's pulse handling by at least 20% for reliable long-term operation and consider parallel current sharing if expecting frequent high-energy events. Monitor junction temperature to prevent cumulative stress damage.
What thermal design considerations are critical when placing the P4SMA6.8A near high-temperature components on an SMT board?
When placing the P4SMA6.8A near heat sources like power MOSFETs or inductors, thermal coupling can push the junction temperature toward its 150°C maximum, increasing leakage current and reducing reliability. Despite its MSL-1 rating and robust construction, sustained high temperatures accelerate aging in Zener TVS diodes. Use thermal relief pads and increase copper pour width for heat spreading only if necessary—excessive copper can interfere with solder reflow. Monitor local board temperature during operation, and if ambient exceeds 85°C, derate the peak pulse power capability by 0.5% per °C above 85°C. Validate performance under worst-case thermal conditions during design verification.
How does the clamping performance of the P4SMA6.8A compare to the SP3209-06LTPL in 3.3V data line protection applications?
The P4SMA6.8A has a higher clamping voltage (10.5V max) compared to the SP3209-06LTPL, which is optimized for low-voltage data lines with tighter clamping around 7V. In 3.3V applications, the P4SMA6.8A's 10.5V clamp may exceed the withstand voltage of interface ICs like RS-232 transceivers or microcontrollers, risking damage. The SP3209 offers better protection for sensitive logic due to lower dynamic resistance and superior response time. While the P4SMA6.8A fits SMA packages and handles higher peak power (400W), it's not ideal for data lines. For signal integrity and protection, use the SP3209-06LTPL or a dedicated low-capacitance TVS. Reserve the P4SMA6.8A for higher-voltage power rail support where its Zener characteristics are more appropriate.
Quality Assurance (QC)
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P4SMA6.8A CAD Models
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