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P4SMA6.8CA
NextGen Components
TVS Diode 400W 6.8V BI SMA
17086 Pcs New Original In Stock
10.5V Clamp Ipp Tvs Diode Surface Mount DO-214AC, SMA
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5.0 / 5.0
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P4SMA6.8CA
Product Overview
2053086
DiGi Electronics Part Number
P4SMA6.8CA-DGManufacturer
NextGen Components
P4SMA6.8CA
Description
TVS Diode 400W 6.8V BI SMAInventory
17086 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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P4SMA6.8CA Technical Specifications
Category
Transient Voltage Suppressors (TVS), TVS Diodes
Packaging
Tape & Reel (TR)
Series
SMA
Product Status
Active
Type
Zener
Bidirectional 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
P4SMA6.8CA-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-P4SMA6.8CATR
Standard Package
5,000
Reviews
5.0/5.0-(Show up to 5 Ratings)
Dec 02, 2025
Leur site web est très bien conçu, ce qui facilite la gestion de nos commandes.
Dec 02, 2025
Leur service après-vente m'a aidé à résoudre rapidement une question technique. Je suis très satisfait de leur professionnalisme.
Dec 02, 2025
Thanks to their price advantages, I can afford to buy more quality items.
Dec 02, 2025
Fast shipping and knowledgeable support create a seamless shopping experience.
Dec 02, 2025
I trust DiGi Electronics for reliable and durable electronic solutions.
Dec 02, 2025
The fast turnaround on orders helps us stay on schedule efficiently.
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Frequently Asked Questions (FAQ)
Can the P4SMA6.8CA TVS diode safely protect a 5V digital logic line from ESD and voltage transients without causing signal integrity issues during normal operation?
Yes, the P4SMA6.8CA is suitable for protecting 5V logic lines due to its 5.8V reverse standoff voltage, which remains below the typical 6V absolute maximum of many 5V CMOS devices. However, its 6.45V minimum breakdown voltage means it may begin conducting slightly above nominal 5V during fast transients—ensure your downstream circuitry tolerates brief excursions up to ~6.2V. For high-speed signals (>10 MHz), verify parasitic capacitance (typically ~50 pF for this SMA-packaged TVS) does not distort rise/fall times; consider lower-capacitance alternatives like the Littelfuse SMAJ5.0A if signal degradation is observed.
What are the risks of replacing a unidirectional TVS like the SMAJ6.0A with the bidirectional P4SMA6.8CA in an automotive 12V power rail application?
Replacing a unidirectional TVS (e.g., SMAJ6.0A) with the bidirectional P4SMA6.8CA on a 12V rail introduces significant risk: the P4SMA6.8CA’s 5.8V standoff voltage is far below the nominal 12V operating voltage, causing continuous conduction and thermal runaway. Bidirectional TVS diodes are intended for AC or signal lines, not DC power rails above their standoff. This mismatch can lead to immediate failure during power-up. Always use a unidirectional TVS with a standoff ≥14V (e.g., SMAJ15A) for 12V automotive systems—never substitute based solely on peak power rating.
How does the P4SMA6.8CA perform under repetitive transient events compared to higher-power TVS diodes like the 600W P6SMB6.8A, and when should I consider upgrading?
The P4SMA6.8CA’s 400W peak pulse power is adequate for occasional IEC 61000-4-5 surges (e.g., 8/20 µs waveforms), but under repetitive or extended transients—common in industrial environments with inductive load switching—it may overheat due to limited thermal mass in the SMA package. The P6SMB6.8A (600W, DO-214AA/SMB) offers better energy absorption and thermal performance. Upgrade if your system experiences frequent surges (>1 per minute) or operates near the upper temperature limit (-50°C to 150°C). Monitor junction temperature using derating curves; sustained operation above 125°C TJ accelerates degradation.
Is the P4SMA6.8CA a drop-in replacement for the Vishay SMA6J6.8A in a telecom interface protection circuit, and what layout considerations apply?
The P4SMA6.8CA is electrically compatible with the Vishay SMA6J6.8A—both are 6.8V bidirectional TVS diodes in DO-214AC/SMA packages with similar clamping voltages (~10.5V @ Ipp)—but verify footprint compatibility: while pinouts match, pad geometries may differ slightly. More critically, ensure your PCB layout minimizes trace inductance between the protected line and ground plane; use short, wide traces and place the TVS as close as possible to the connector. Poor layout can negate the diode’s response speed, allowing transient energy to reach sensitive ICs. Also confirm RoHS and MSL1 compatibility aligns with your assembly process.
Given the P4SMA6.8CA’s -50°C to 150°C operating range, can it reliably protect outdoor IoT sensor nodes exposed to temperature cycling and humidity?
Yes, the P4SMA6.8CA’s extended temperature range and MSL1 (unlimited floor life) rating make it suitable for harsh outdoor environments, including temperature cycling and high humidity. However, reliability depends on proper PCB design: ensure adequate copper pour under the SMA package for heat dissipation and avoid mechanical stress near solder joints, which can crack under thermal cycling. Combine with conformal coating to prevent moisture ingress at the package-to-PCB interface. For mission-critical nodes, validate long-term performance via accelerated life testing (e.g., 1,000-cycle thermal shock per JESD22-A104), as repeated stress can degrade bond wires even within rated limits.
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P4SMA6.8CA CAD Models
NextGen Components P4SMA6.8CA PCB symbols & footprints
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