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Vishay General Semiconductor - Diodes Division P4SMA6.8AHE3_A/I
- Part No.:
- P4SMA6.8AHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA6.8AHE3_A/I.pdf
- Description:
- TVS DIODE 5.8VWM 10.5VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,500
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Product details
Overview
P4SMA6.8AHE3_A/I from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode designed for primary overvoltage protection on DC power rails and signal lines. It features a 6.8 V breakdown voltage (VBR = 6.45–7.14 V at 10 mA), 5.8 V stand-off voltage (VWM), 10.5 V clamping voltage (VC) at 38.1 A peak pulse current, and 400 W peak pulse power rating with 10/1000 µs waveform. It is AEC-Q101 qualified and housed in SMA (DO-214AC) package for automotive and industrial electronics.
For engineers reviewing the P4SMA6.8AHE3_A/I datasheet, P4SMA6.8AHE3_A/I pinout, P4SMA6.8AHE3_A/I application, or P4SMA6.8AHE3_A/I equivalent, this device serves as a robust, surface-mount solution for protecting MOSFETs, ICs, and sensor interfaces against inductive switching transients and ESD events in space-constrained designs requiring automotive-grade reliability.
Technical Context
The P4SMA6.8AHE3_A/I operates as a unidirectional avalanche diode that clamps transient overvoltages above its breakdown threshold while maintaining low leakage (<1000 µA at 5.8 V). Its glass-passivated junction ensures stable VBR tolerance (±5%) and fast response time (<1 ns), enabling effective suppression of sub-microsecond surges.
Thermally, it exhibits RθJA = 120 °C/W and RθJL = 30 °C/W, with maximum junction temperature of +150 °C and surge capability up to 40 A (8.3 ms half-sine). The cathode-band marking identifies polarity, and the device meets MSL Level 1 per J-STD-020 with 260 °C reflow peak.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 6.45 V / 7.14 V at 10 mA - defines precise clamping onset threshold for reliable overvoltage detection |
| VWM | 5.8 V - maximum continuous reverse working voltage before leakage rises significantly |
| VC @ IPPM | 10.5 V at 38.1 A - peak clamped voltage during 400 W transient, limiting stress on downstream components |
| PPPM | 400 W (10/1000 µs) - surge energy handling capacity suitable for automotive load-dump and ISO 7637-2 compliance |
| IFSM | 40 A (8.3 ms half-sine) - single-event forward surge rating for inrush or fault-current scenarios |
| TJ max | +150 °C - enables operation in under-hood automotive environments and high-ambient industrial settings |
| AEC-Q101 | Qualified - validated for automotive electronic systems requiring zero-defect reliability and extended temperature cycling |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Cathode identified by band marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., ground or return path) in unidirectional configuration |
| Cathode | Avalanche clamping terminal | Connected to protected line (e.g., 5 V rail); band marking indicates cathode end for correct orientation |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power | Supports robust protection against ISO 7637-2 Pulse 1, 2a, and 5a transients without derating below 91 V |
| Glass passivated junction | Ensures stable VBR over lifetime and resistance to humidity-induced parameter drift |
| MSL Level 1 rating | Enables standard SMT reflow without moisture sensitivity concerns or baking requirements |
| AEC-Q101 qualification | Validates reliability for automotive powertrain, body control, and ADAS modules operating at -40 °C to +125 °C ambient |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients, improving protection margin for sensitive CMOS inputs |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 5 V microcontroller supply rails in vehicle body control modules exposed to load-dump and inductive kickback. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VIN and GND to clamp transients before they reach LDO input or MCU VDD. Use Value: Limits clamped voltage to 10.5 V, preventing latch-up or gate oxide damage in 5 V logic devices during 400 W surges. | Use Scenario: Safeguarding analog output lines of pressure or temperature sensors in factory automation PLC I/O modules. IC Role / Device Role / Timing Role: TVS mounted across sensor signal and reference ground to absorb ESD and cable discharge events. Use Value: Sub-1 ns response and 10.5 V clamping prevent false readings or ADC saturation during 8 kV contact ESD per IEC 61000-4-2. |
| Consumer USB Port Protection | MOSFET Gate Driver Protection |
Use Scenario: Shielding VBUS and D+/D- lines in portable docking stations against hot-plug transients and ESD. IC Role / Device Role / Timing Role: Discrete TVS array (using individual P4SMA6.8AHE3_A/I units) on each line referenced to system ground. Use Value: 5.8 V VWM allows full 5 V USB signaling margin while clamping to 10.5 V ensures USB PHY survival under 15 kV air discharge. | Use Scenario: Protecting high-side N-channel MOSFET gate drivers in motor control inverters from Miller-induced voltage spikes. IC Role / Device Role / Timing Role: TVS connected between gate and source to clamp dv/dt-induced overshoot during switching transitions. Use Value: Low clamping voltage (10.5 V) prevents accidental gate oxide breakdown in 20 V-rated MOSFETs during 100 ns edge transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ6.8A | Same SMA package, identical VBR (6.45–7.14 V), but rated for 400 W with 10/1000 µs waveform and no AEC-Q101 qualification | Commercial-grade only; not validated for automotive temperature cycling or long-term reliability testing | Select when AEC-Q101 is not required and cost optimization is prioritized over automotive qualification |
| 1.5SMC6.8A | Higher power rating (1500 W), larger SMC (DO-214AB) package, same VBR range, AEC-Q101 available in HE3 variant | Requires larger PCB footprint and higher thermal mass; suited for higher-energy transients like ISO 16750-2 load dump | Choose when surge energy exceeds 400 W or board layout accommodates larger SMC footprint |
Compared with SMAJ6.8A, P4SMA6.8AHE3_A/I adds AEC-Q101 qualification and tighter process control for automotive use; compared with 1.5SMC6.8A, it trades peak power for compactness and lower thermal resistance in space-constrained modules.
Availability
P4SMA6.8AHE3_A/I is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor nodes, and consumer USB power delivery systems requiring stable component supply, AEC-Q101 traceability, and consistent surge performance across production batches.
Supply support for P4SMA6.8AHE3_A/I 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, efficiency, and application-specific validation.
The P4SMA series is engineered for surface-mount transient suppression in automotive, industrial, and computing applications where compact size, high surge capability, and qualification-grade consistency are critical design requirements.
FAQ
What is the clamping voltage of the P4SMA6.8AHE3_A/I under maximum surge conditions?
The P4SMA6.8AHE3_A/I has a maximum clamping voltage (VC) of 10.5 V at 38.1 A peak pulse current (IPPM) using the standard 10/1000 µs waveform. This value is measured per Figure 1 in the Vishay datasheet 88367 and reflects the actual voltage seen by protected circuitry during worst-case transient events, ensuring compatibility with 5 V logic families and low-voltage MOSFET gates.
Is the P4SMA6.8AHE3_A/I suitable for automotive applications?
Yes, the P4SMA6.8AHE3_A/I is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HE3" and revision notes in document 88367. It supports operating junction temperatures from -65 °C to +150 °C and is validated for automotive environments including engine control units, infotainment power supplies, and ADAS sensor interfaces requiring zero-defect reliability.
What does the "_A/I" suffix mean in P4SMA6.8AHE3_A/I?
The "_A/I" suffix in P4SMA6.8AHE3_A/I denotes the packaging configuration: "A" indicates AEC-Q101 qualification level, and "I" specifies 13-inch diameter plastic tape-and-reel delivery with 7500 units per reel. This matches Vishay's ordering information table on page 3 of document 88367 and ensures traceability and automated placement compatibility.
How does the P4SMA6.8AHE3_A/I differ from bidirectional TVS diodes like P4SMA6.8CA?
The P4SMA6.8AHE3_A/I is unidirectional and features a cathode band for polarity-sensitive placement, whereas P4SMA6.8CA is bidirectional with no polarity marking. Unidirectional operation allows lower leakage at VWM (1000 µA vs. 2000 µA for CA types ≤10 V) and is preferred for DC rail protection; bidirectional variants suit AC-coupled or floating signal lines.
What is the thermal resistance of the P4SMA6.8AHE3_A/I, and how does it affect PCB layout?
The P4SMA6.8AHE3_A/I has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W and junction-to-lead (RθJL) of 30 °C/W. To maintain safe junction temperature under repetitive surges, PCB layout must use minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal as specified in Figure 2 of the datasheet-smaller pads increase thermal impedance and risk thermal runaway.
P4SMA6.8AHE3_A/I 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
P4SMA6.8AHE3_A/I FAQ
1.How can I place an order for P4SMA6.8AHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA6.8AHE3_A/I 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 P4SMA6.8AHE3_A/I reliable?
The price and inventory of P4SMA6.8AHE3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA6.8AHE3_A/I is usually 5 days.
3.What payment methods are accepted for P4SMA6.8AHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA6.8AHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA6.8AHE3_A/I?
P4SMA6.8AHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA6.8AHE3_A/I 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 P4SMA6.8AHE3_A/I?
For technical support, including P4SMA6.8AHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA6.8AHE3_A/I requirements.
6.How does Aetrix verify that P4SMA6.8AHE3_A/I is sourced from the original manufacturer or authorized distributors?
All P4SMA6.8AHE3_A/I 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 P4SMA6.8AHE3_A/I meets industry standards.
7.What is the process for return or replacement of P4SMA6.8AHE3_A/I?
All P4SMA6.8AHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA6.8AHE3_A/I, 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 P4SMA6.8AHE3_A/I part is unused and in its original packaging.
Return procedure for P4SMA6.8AHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA6.8AHE3_A/I Tags
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