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Vishay General Semiconductor - Diodes Division P4SMA6.8A-E3/5A
- Part No.:
- P4SMA6.8A-E3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA6.8A-E3/5A.pdf
- Description:
- TVS DIODE 5.8VWM 10.5VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:9,037
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Product details
Overview
P4SMA6.8A-E3/5A from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode designed for primary overvoltage protection of sensitive electronics. It features a 6.45 V to 7.14 V breakdown voltage (VBR) at 10 mA, 5.8 V maximum standoff voltage (VWM), and clamps transients up to 10.5 V at 38.1 A peak pulse current (IPPM) under 10/1000 µs waveform - ideal for safeguarding power rails and I/O lines in consumer and industrial power supplies.
For engineers reviewing the P4SMA6.8A-E3/5A datasheet, P4SMA6.8A-E3/5A pinout, P4SMA6.8A-E3/5A application, or P4SMA6.8A-E3/5A equivalent, this device delivers verified 400 W peak pulse power capability, low incremental surge resistance, and AEC-Q101 qualification readiness - critical for robust ESD and lightning surge protection in space-constrained PCB layouts.
Technical Context
The P4SMA6.8A-E3/5A operates as a unidirectional clamping TVS diode with glass-passivated junction and SMA (DO-214AC) package. Its 10.5 V clamping voltage at 38.1 A ensures tight overvoltage limiting during fast transients, while its 0.057 %/°C temperature coefficient of VBR guarantees stable breakdown behavior across -65 °C to +150 °C operating range.
It supports repetitive surge duty cycles up to 0.01 % (per J-STD-020 MSL Level 1), exhibits 1000 µA max reverse leakage at VWM, and achieves sub-nanosecond response time due to low-junction-capacitance design - enabling effective suppression of EFT, ESD, and inductive switching spikes on 5 V logic and power circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 6.45 V / 7.14 V at 10 mA - defines precise voltage threshold where clamping begins |
| VWM | 5.8 V - maximum continuous reverse operating voltage before leakage exceeds 1000 µA |
| VC @ IPPM | 10.5 V at 38.1 A (10/1000 µs) - actual clamped voltage seen by protected circuit during surge |
| PPPM | 400 W - peak transient energy absorption capacity without failure |
| IFSM | 40 A - single half-sine surge current rating (8.3 ms), supporting high-energy fault events |
| TJ max. | +150 °C - enables reliable operation in thermally demanding environments like automotive engine bays |
| RθJA | 120 °C/W - thermal resistance from junction to ambient, guiding heatsinking requirements on standard PCB pads |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile plastic case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Cathode indicated by band on body; anode is unmarked end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal (forward bias) | Connected to lower-potential side of protected line; enables unidirectional conduction during surge |
| Cathode | Current exit terminal (reverse bias clamping) | Banded end; connected to higher-potential rail (e.g., VCC) to clamp positive transients to ground |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 µs) | Enables robust protection against IEC 61000-4-5 Level 4 surges (4 kV) without derating on standard 5 mm × 5 mm copper pads |
| Glass passivated chip junction | Ensures long-term reliability and stable electrical parameters under humidity and thermal cycling stress |
| MSL Level 1 (260 °C peak reflow) | Supports standard lead-free SMT assembly without pre-baking or special handling |
| AEC-Q101 qualified option available | Meets automotive-grade stress testing for use in infotainment, ADAS, and body control modules |
| Low incremental surge resistance | Minimizes clamping voltage overshoot during fast-rising transients (<1 ns rise time), improving system immunity |
Applications
| USB Power Input Protection | 5 V Microcontroller I/O Line Protection |
|---|---|
Use Scenario: Protecting USB VBUS input against hot-plug transients and external ESD events. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VBUS and GND to clamp positive surges above 5.8 V. Use Value: Limits voltage to ≤10.5 V during 38.1 A surge, preventing damage to USB controller ICs and maintaining compliance with USB 2.0 voltage tolerance. |
Use Scenario: Shielding GPIO, UART, or SPI pins of microcontrollers from ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance TVS connected from signal line to GND to absorb ±8 kV contact ESD per IEC 61000-4-2. Use Value: Sub-100 pF junction capacitance avoids signal integrity degradation on 10 MHz digital lines while delivering full 400 W surge immunity. |
| DC-DC Converter Output Rail Protection | Automotive Body Control Module Power Input |
Use Scenario: Securing regulated 5 V output of buck converters against load-dump-induced overshoot and inductive kickback. IC Role / Device Role / Timing Role: Clamping diode installed at converter output to shunt excess energy into ground during transient overvoltage. Use Value: Withstands 40 A non-repetitive forward surge (IFSM) and maintains clamping below 11 V, preserving downstream logic supply integrity. |
Use Scenario: Protecting 12 V power inputs in automotive BCMs from ISO 7637-2 pulse 1, 2a, and 5a transients. IC Role / Device Role / Timing Role: Primary TVS on main power rail, rated for AEC-Q101-compliant variants (P4SMA6.8AHE3_A). Use Value: Delivers 400 W pulse power handling and -65 °C to +150 °C operation, meeting OEM requirements for under-hood electronics durability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ6.8A (Vishay) | Higher 600 W PPPM, SMB (DO-214AA) package - 2.5 mm wider, 0.3 mm taller than SMA | Preferred where higher surge margin is required and board space allows larger footprint | Select SMBJ6.8A when system-level surge testing exceeds IEC 61000-4-5 Level 4 or requires >400 W headroom |
| 1.5SMC6.8A (ON Semiconductor) | Same 400 W PPPM, SMC (DO-214AB) package - 3.5 mm wide, 2.5 mm thick vs. SMA's 2.5 mm × 2.5 mm | Used in legacy designs with SMC-compatible land patterns; slightly higher RθJA (140 °C/W) | Choose 1.5SMC6.8A only if existing PCB layout uses SMC pads and no redesign is permitted |
Compared with SMBJ6.8A and 1.5SMC6.8A, the P4SMA6.8A-E3/5A offers optimal balance of compact SMA footprint, industry-standard 400 W surge rating, and RoHS-compliant tape-and-reel packaging (7500 pcs/reel), making it ideal for high-density consumer and industrial PCBs where space and procurement efficiency are critical.
Availability
P4SMA6.8A-E3/5A is available at Aetrix Electronics and suitable for USB power protection, microcontroller I/O hardening, DC-DC converter output stabilization, and automotive body control module power input conditioning requiring stable component supply and consistent parametric performance.
Supply support for P4SMA6.8A-E3/5A 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
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, rectifiers, MOSFETs, and protection devices with emphasis on reliability, precision, and automotive-grade qualification.
The P4SMA6.8A-E3/5A belongs to Vishay's TRANSZORB® TVS family, engineered specifically for high-efficiency, low-profile transient suppression in space-constrained power and signal lines across consumer, industrial, and automotive applications.
FAQ
What is the maximum clamping voltage of the P4SMA6.8A-E3/5A during a 10/1000 µs surge?
The P4SMA6.8A-E3/5A clamps to a maximum of 10.5 V at 38.1 A peak pulse current under the standardized 10/1000 µs waveform. This value is measured per Figure 1 in the Vishay datasheet (Document Number: 88367) and represents the highest voltage imposed on the protected circuit during worst-case surge conditions - critical for ensuring compatibility with 5 V logic interfaces and USB power rails.
Is the P4SMA6.8A-E3/5A suitable for automotive applications?
The P4SMA6.8A-E3/5A itself is RoHS-compliant and commercial-grade; however, Vishay offers AEC-Q101-qualified versions under ordering codes like P4SMA6.8AHE3_A. The P4SMA6.8A-E3/5A shares identical electrical characteristics and package dimensions with those qualified variants, enabling drop-in validation in automotive designs once the HE3 suffix variant is substituted for final qualification.
What does the "-E3/5A" suffix indicate in P4SMA6.8A-E3/5A?
The "-E3" denotes RoHS-compliant, commercial-grade construction with matte tin-plated leads, while "/5A" specifies packaging in 13-inch diameter plastic tape and reel containing 7500 units - optimized for high-volume SMT placement. This differs from "/61", which indicates 7-inch reels of 1800 units, allowing flexible procurement based on production scale.
How does the P4SMA6.8A-E3/5A compare to bidirectional TVS diodes like P4SMA6.8CA?
The P4SMA6.8A-E3/5A is unidirectional and intended for DC line protection where polarity is fixed (e.g., VCC-to-GND), offering lower leakage and tighter VBR tolerance. In contrast, P4SMA6.8CA provides symmetrical clamping for AC or floating signal lines but exhibits higher reverse leakage and dual-threshold behavior - making the P4SMA6.8A-E3/5A preferable for 5 V power rail protection where minimal quiescent loss matters.
What is the thermal resistance and how does it affect PCB layout for the P4SMA6.8A-E3/5A?
The P4SMA6.8A-E3/5A has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. To maintain safe junction temperatures under repetitive surges, designers must allocate adequate copper area and avoid excessive trace length - undersized pads increase thermal impedance and risk premature thermal runaway during sustained transient activity.
P4SMA6.8A-E3/5A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- P4SMA, TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 5.8V
- Voltage - Breakdown (Min):
- 6.45V
- Voltage - Clamping (Max) @ Ipp:
- 10.5V
- Current - Peak Pulse (10/1000µs):
- 38.1A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
P4SMA6.8A-E3/5A FAQ
1.How can I place an order for P4SMA6.8A-E3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA6.8A-E3/5A 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 P4SMA6.8A-E3/5A reliable?
The price and inventory of P4SMA6.8A-E3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA6.8A-E3/5A is usually 5 days.
3.What payment methods are accepted for P4SMA6.8A-E3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA6.8A-E3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA6.8A-E3/5A?
P4SMA6.8A-E3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA6.8A-E3/5A 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 P4SMA6.8A-E3/5A?
For technical support, including P4SMA6.8A-E3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA6.8A-E3/5A requirements.
6.How does Aetrix verify that P4SMA6.8A-E3/5A is sourced from the original manufacturer or authorized distributors?
All P4SMA6.8A-E3/5A 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 P4SMA6.8A-E3/5A meets industry standards.
7.What is the process for return or replacement of P4SMA6.8A-E3/5A?
All P4SMA6.8A-E3/5A units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA6.8A-E3/5A, 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 P4SMA6.8A-E3/5A part is unused and in its original packaging.
Return procedure for P4SMA6.8A-E3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA6.8A-E3/5A Tags
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