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Taiwan Semiconductor Corporation P4SMA6.8CH
- Part No.:
- P4SMA6.8CH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA6.8CH.pdf
- Description:
- 400W, 6.8V, BIDIRECTIONAL, TVS
- Quantity:
- Payment:
- Shipping:
Inventory:8,886
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Product details
Overview
P4SMA6.8CH from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode designed for robust overvoltage protection in DC power rails and signal lines. It features a 6.8V breakdown voltage (6.12–7.48V), 5.5V working stand-off voltage, 10.8V clamping voltage at 38A peak pulse current, 400W peak pulse power rating (10/1000μs), and AEC-Q101 qualification for automotive-grade reliability.
For engineers reviewing the P4SMA6.8CH datasheet, P4SMA6.8CH pinout, P4SMA6.8CH application, or P4SMA6.8CH equivalent, key selection criteria include clamping performance under ISO 7637-2 Pulse 1/2a/2b/3a/3b transients, low leakage (<1000µA at 5.5V), DO-214AC (SMA) package compatibility with automated SMT assembly, and junction temperature range of –55°C to +150°C.
Technical Context
This TVS diode employs a glass-passivated silicon junction optimized for fast response (<1.0ps) and stable clamping during high-energy transients. Its unidirectional configuration provides reverse-biased surge suppression while maintaining low forward voltage (VF = 3.5V at 25A) for fault-tolerant operation in DC-fed systems.
The device meets ISO 7637-2 compliance for automotive electrical disturbances and supports bidirectional use only when specified with CH or CAH suffix variants - P4SMA6.8CH itself is unidirectional, with cathode band marking and polarity-sensitive placement on PCBs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR @ IT | 6.12–7.48 V at 10 mA test current - defines minimum/maximum voltage at which avalanche conduction begins |
| VWM | 5.50 V - maximum continuous reverse operating voltage before significant leakage occurs |
| VC @ IPPM | 10.8 V at 38 A (10/1000 μs) - clamped voltage seen by protected circuit during worst-case surge |
| PPPM | 400 W - peak pulse power handling capability per single transient event |
| IR @ VWM | <1000 µA - ensures minimal standby power loss and signal integrity in high-impedance circuits |
| TJ Range | –55°C to +150°C - enables deployment in under-hood automotive, industrial power supplies, and wide-temperature embedded systems |
| Package | DO-214AC (SMA) - industry-standard surface-mount outline with matte tin-plated leads, J-STD-002 solderability |
Pinout & Package
DO-214AC (SMA) package: molded plastic case with axial leadform, cathode indicated by band marking; terminals are anode and cathode - no internal connections beyond the two-terminal diode structure.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse surge return path | Connected to ground or low-impedance return node in unidirectional TVS configuration |
| Cathode | Reverse-biased terminal / Surge current sink | Connected to protected line (e.g., 5V rail, CAN_H); clamps to anode when voltage exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress-test requirements including temperature cycling, HTRB, and ESD |
| Glass passivated junction | Enhances long-term reliability and moisture resistance vs. epoxy-passivated alternatives |
| Fast response time <1.0 ps | Enables suppression of nanosecond-scale ESD and EFT events before downstream IC damage occurs |
| Meets ISO 7637-2 Pulse 1/2a/2b/3a/3b | Guarantees survivability against real-world automotive load dump, inductive switching, and battery disconnect transients |
| Moisture sensitivity level 1 | Zero bake requirement prior to reflow; compatible with standard SMT assembly without dry-pack handling |
Applications
| Switching Mode Power Supply (SMPS) | Automotive On-Board DC/DC Converter |
|---|---|
Use Scenario: Protection of primary-side gate drivers and secondary-side feedback circuits against flyback spikes and cross-conduction surges. IC Role / Device Role: Unidirectional TVS placed across MOSFET drain-source or optocoupler input to clamp inductive kickback. Use Value: Limits transient voltage to ≤10.8 V, preventing latch-up or oxide breakdown in 5V/12V control ICs while sustaining 400W peak power. | Use Scenario: Safeguarding 12V-to-3.3V buck converter inputs in engine control units exposed to ISO 7637-2 Pulse 5a load dump. IC Role / Device Role: Primary-line TVS connected between input rail and chassis ground to shunt surge energy before L-C filter stage. Use Value: Clamps 12V rail to 10.8V during 400W transients, preserving regulator input rating and enabling compliance with automotive EMC standards. |
| LED Lighting Driver Input Stage | Industrial Adapter Input Protection |
Use Scenario: Input surge suppression for constant-current LED drivers subjected to AC line transients and hot-plug events. IC Role / Device Role: Unidirectional TVS installed after bridge rectifier output to protect electrolytic capacitor and controller IC. Use Value: Withstands repeated 10/1000μs surges up to 38A while maintaining <1000µA leakage at 5.5V, minimizing standby power loss. | Use Scenario: Overvoltage protection in universal-input AC/DC adapters used in medical and industrial equipment. IC Role / Device Role: Secondary-side TVS across DC output to prevent overvoltage propagation to connected loads during regulation failure. Use Value: Delivers 10.8V clamping at full rated current, ensuring downstream USB-PD or PoE controllers remain within absolute maximum ratings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ6.8A | 600W rating, SMB package (larger footprint), 11.2V clamping at 53.3A | Better suited for higher-energy transients; requires PCB layout change due to larger DO-214AA outline | Select when system-level testing shows >400W surge exposure or when thermal margin demands lower clamping voltage per watt |
| 1.5SMC6.8A | 1500W rating, SMC package (DO-214AB), 10.5V clamping at 143A | Designed for front-end AC input stages; overqualified for point-of-load protection | Choose only if protecting upstream bulk capacitors or rectifier bridges where peak currents exceed 38A |
Compared with SMBJ6.8A and 1.5SMC6.8A, P4SMA6.8CH offers optimal balance of compact DO-214AC footprint, AEC-Q101 qualification, and precise 10.8V clamping - making it ideal for space-constrained automotive and industrial DC rail protection where 400W surge immunity suffices.
Availability
P4SMA6.8CH is available at Aetrix Electronics and suitable for switching mode power supplies, automotive DC/DC converters, and LED lighting drivers requiring stable component supply with AEC-Q101 assurance and RoHS/halogen-free compliance.
Supply support for P4SMA6.8CH includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Taiwan Semiconductor Corporation (TSC) is a vertically integrated analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, specializing in power management, protection, and signal conditioning devices.
The P4SMA6.8CH belongs to TSC's AEC-Q101-qualified P4SMA series of surface-mount TVS diodes, engineered specifically for automotive and industrial power rail protection where compact size, fast response, and ISO 7637-2 compliance are mandatory.
FAQ
What is the polarity configuration of the P4SMA6.8CH?
The P4SMA6.8CH is a unidirectional TVS diode with clearly marked cathode band. It conducts in reverse bias during overvoltage events and blocks forward current up to 3.5V at 25A. This polarity must be observed during PCB layout - incorrect orientation will disable surge protection. The cathode connects to the line being protected (e.g., 5V rail), and anode ties to ground.
Does the P4SMA6.8CH meet automotive qualification standards?
Yes, the P4SMA6.8CH is AEC-Q101 qualified and explicitly tested to meet ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b transient immunity requirements. Its construction includes glass passivation, JESD201 Class 2 whisker resistance, and MSL Level 1 moisture handling - all critical for under-hood and body-control module deployments.
What is the clamping voltage of the P4SMA6.8CH under standard test conditions?
The P4SMA6.8CH has a maximum clamping voltage (VC) of 10.8 V at 38 A peak pulse current using the 10/1000 μs waveform. This value is guaranteed across temperature and represents the upper limit of voltage imposed on the protected circuit during a full-rated surge event - essential for verifying compatibility with downstream IC absolute maximum ratings.
Can the P4SMA6.8CH be used in bidirectional applications?
No - the P4SMA6.8CH is unidirectional only. For bidirectional transient suppression, Taiwan Semiconductor specifies variants with "CAH" suffix (e.g., P4SMA6.8CAH). Using P4SMA6.8CH in bidirectional mode risks forward conduction and failure during positive transients; always verify part number suffix and consult the ordering information table for correct variant selection.
What packaging and reel quantity is offered for the P4SMA6.8CH?
The P4SMA6.8CH is supplied in DO-214AC (SMA) package on tape-and-reel format, with 7,500 units per reel. The terminals are matte tin-plated and compliant with J-STD-002 for solderability, supporting both lead-free and SnPb reflow profiles. No special handling or baking is required due to MSL Level 1 classification.
P4SMA6.8CH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AC, SMA
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 5.5V
- Voltage - Breakdown (Min):
- 6.12V
- Voltage - Clamping (Max) @ Ipp:
- 10.8V
- Current - Peak Pulse (10/1000µs):
- 38A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
P4SMA6.8CH FAQ
1.How can I place an order for P4SMA6.8CH through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA6.8CH on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for P4SMA6.8CH reliable?
The price and inventory of P4SMA6.8CH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA6.8CH is usually 5 days.
3.What payment methods are accepted for P4SMA6.8CH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA6.8CH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA6.8CH?
P4SMA6.8CH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA6.8CH order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for P4SMA6.8CH?
For technical support, including P4SMA6.8CH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA6.8CH requirements.
6.How does Aetrix verify that P4SMA6.8CH is sourced from the original manufacturer or authorized distributors?
All P4SMA6.8CH products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that P4SMA6.8CH meets industry standards.
7.What is the process for return or replacement of P4SMA6.8CH?
All P4SMA6.8CH units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA6.8CH, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The P4SMA6.8CH part is unused and in its original packaging.
Return procedure for P4SMA6.8CH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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