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Vishay General Semiconductor - Diodes Division P4SMA6.8AHM3/I
- Part No.:
- P4SMA6.8AHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA6.8AHM3/I.pdf
- Description:
- TVS DIODE 5.8VWM 10.5VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,130
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Product details
Overview
P4SMA6.8AHM3/I 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 6.8 V breakdown voltage (VBR = 6.45–7.14 V at 10 mA), 5.8 V stand-off voltage (VWM), and clamps transients to ≤10.5 V at 38.1 A peak pulse current (10/1000 µs), delivering 400 W peak pulse power in automotive and industrial power rail protection.
For engineers reviewing the P4SMA6.8AHM3/I datasheet, P4SMA6.8AHM3/I pinout, P4SMA6.8AHM3/I application, or P4SMA6.8AHM3/I equivalent, this device serves as a halogen-free, AEC-Q101-qualified TVS for robust ESD and surge suppression on 5 V logic rails, DC power inputs, and sensor interfaces where low clamping voltage and fast response (<1 ns) are critical.
Technical Context
The P4SMA6.8AHM3/I operates as a unidirectional avalanche diode with glass-passivated junction, enabling precise voltage clamping during transient events. Its 10.5 V maximum clamping voltage at 38.1 A ensures downstream ICs remain below absolute maximum ratings during 400 W surges.
Thermal performance is defined by RθJA = 120 °C/W and RθJL = 30 °C/W, supporting operation up to TJ = 150 °C. The device meets J-STD-020 MSL Level 1 and passes JESD201 Class 2 whisker testing, confirming suitability for lead-free reflow assembly.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 6.45 V / 7.14 V at 10 mA - defines precise avalanche onset threshold for reliable triggering |
| VWM | 5.8 V - maximum continuous reverse working voltage before leakage exceeds 1000 µA |
| VC @ IPPM | ≤10.5 V at 38.1 A (10/1000 µs) - clamping voltage limiting stress on protected circuitry |
| PPPM | 400 W - peak transient power handling capability under standard surge waveform |
| IFSM | 40 A (8.3 ms half-sine) - surge current rating for unidirectional forward conduction events |
| TJ max | +150 °C - maximum junction temperature enabling use in under-hood automotive environments |
| Package | SMA (DO-214AC) - industry-standard surface-mount package with 5.0 mm × 5.0 mm copper pad thermal layout |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with matte tin-plated leads, UL 94 V-0 rated, polarity indicated by cathode band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / transient return path | Connected to ground or low-impedance return plane; completes clamping loop during positive transients |
| Cathode | Reverse-biased terminal / clamping node | Connected to protected line (e.g., 5 V rail); conducts avalanche current when VIN > VC |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and body electronics |
| Halogen-free & RoHS-compliant | Meets environmental compliance requirements for modern industrial and consumer designs |
| 400 W peak pulse power (10/1000 µs) | Withstands IEC 61000-4-5 Level 4 surges without degradation |
| Low clamping ratio (VC/VBR ≈ 1.47) | Minimizes voltage overshoot during fast transients, protecting 5 V logic interfaces |
| MSL Level 1, 260 °C peak reflow | Compatible with standard lead-free SMT assembly processes without moisture sensitivity concerns |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 5 V supply lines in automotive ECUs exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Unidirectional TVS clamping transient energy before it reaches microcontroller power pins. Use Value: Clamps to ≤10.5 V within nanoseconds, preventing latch-up or permanent damage to 5 V tolerant ICs. |
Use Scenario: Safeguarding analog sensor outputs (e.g., pressure, temperature) connected to PLC input modules. IC Role / Device Role / Timing Role: Standby-mode protector absorbing ESD strikes and inductive kickback from nearby solenoids. Use Value: 1000 µA max leakage at 5.8 V preserves signal integrity in high-impedance sensor circuits. |
| Consumer USB Port Protection | Telecom DC Power Input Protection |
Use Scenario: Secondary-level surge suppression on VBUS line of USB 2.0 ports in set-top boxes and routers. IC Role / Device Role / Timing Role: Fast-acting shunt device diverting ESD (IEC 61000-4-2 ±15 kV) away from USB transceivers. Use Value: Sub-1 ns response time and 10.5 V clamping prevent data corruption and PHY damage during hot-plug events. |
Use Scenario: Input-stage protection for 5 V/12 V telecom power supplies subject to lightning-induced surges. IC Role / Device Role / Timing Role: Primary transient limiter placed upstream of DC-DC converters and LDOs. Use Value: 400 W peak power rating supports repeated 10/1000 µs surges per IEC 61000-4-5 without derating. |
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 lower IPPM (38.0 A) and higher VC (11.5 V) | Higher clamping voltage reduces margin for 5 V logic; less suitable for tight-voltage-tolerance systems | Select SMAJ6.8A only if board layout already accommodates its slightly larger thermal footprint and higher VC is acceptable |
| 1.5SMC6.8A | Higher-power SMC package (1500 W), same VBR range, but larger footprint (7.11 mm × 6.22 mm) and higher VC (10.8 V) | Over-specified for PCB space-constrained 5 V rail protection; better suited for 24 V industrial inputs | Choose 1.5SMC6.8A only when system-level surge requirements exceed 400 W or thermal dissipation demands larger copper area |
Compared with SMAJ6.8A and 1.5SMC6.8A, the P4SMA6.8AHM3/I delivers the lowest clamping voltage (10.5 V) in the smallest SMA footprint while maintaining AEC-Q101 qualification and halogen-free construction-making it optimal for space-limited, automotive-grade 5 V protection.
Availability
P4SMA6.8AHM3/I is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor nodes, consumer USB power delivery, and telecom DC input stages requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for P4SMA6.8AHM3/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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and automotive qualification.
The P4SMA6.8AHM3/I belongs to Vishay's TRANSZORB® TVS family, engineered specifically for high-reliability transient suppression in harsh environments-including under-hood automotive, factory automation, and outdoor telecom infrastructure.
FAQ
What is the maximum clamping voltage of the P4SMA6.8AHM3/I at its rated peak pulse current?
The P4SMA6.8AHM3/I has a maximum clamping voltage (VC) of 10.5 V at its rated peak pulse current of 38.1 A under the standard 10/1000 µs waveform. This value is measured per Figure 1 in the Vishay datasheet (Document Number: 88367) and reflects the actual voltage seen by protected circuitry during worst-case surge conditions. The P4SMA6.8AHM3/I maintains this clamping performance across its specified operating temperature range.
Is the P4SMA6.8AHM3/I suitable for automotive applications?
Yes, the P4SMA6.8AHM3/I is AEC-Q101 qualified and carries the HM3 suffix indicating halogen-free, RoHS-compliant, and automotive-grade construction. It is explicitly rated for use in engine control units, body electronics, and infotainment systems where reliability under thermal cycling, vibration, and electrical transients is mandatory. The P4SMA6.8AHM3/I meets all stress test requirements defined in the AEC-Q101 standard.
What does the "HM3" suffix mean in P4SMA6.8AHM3/I?
The "HM3" suffix in P4SMA6.8AHM3/I denotes halogen-free, RoHS-compliant, and AEC-Q101-qualified construction, with "I" indicating 7500-unit tape-and-reel packaging on a 13-inch diameter reel. This distinguishes it from commercial-grade "E3" or "M3" variants and confirms compliance with automotive material and reliability standards. The P4SMA6.8AHM3/I is fully traceable and manufactured to Vishay's automotive process controls.
How does the P4SMA6.8AHM3/I compare to bidirectional TVS diodes like P4SMA6.8CA?
The P4SMA6.8AHM3/I is unidirectional and intended for DC line protection where polarity is fixed (e.g., +5 V rail to ground), offering tighter VBR tolerance and lower VC than its bidirectional counterpart P4SMA6.8CA. The P4SMA6.8CA provides symmetrical clamping for AC or floating lines but exhibits higher leakage and reduced precision in breakdown threshold. Use the P4SMA6.8AHM3/I when protecting polarized power rails with strict voltage margins.
What is the thermal resistance of the P4SMA6.8AHM3/I, and how does it affect PCB layout?
The P4SMA6.8AHM3/I has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W and junction-to-lead resistance (RθJL) of 30 °C/W, measured on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. To maintain safe operation at full 400 W pulse rating, the P4SMA6.8AHM3/I requires adherence to Vishay's recommended pad layout-underscoring the need for adequate copper area and thermal vias in high-reliability designs.
P4SMA6.8AHM3/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:
- Discontinued at Digi-Key
- 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:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
P4SMA6.8AHM3/I FAQ
1.How can I place an order for P4SMA6.8AHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA6.8AHM3/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 P4SMA6.8AHM3/I reliable?
The price and inventory of P4SMA6.8AHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA6.8AHM3/I is usually 5 days.
3.What payment methods are accepted for P4SMA6.8AHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA6.8AHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA6.8AHM3/I?
P4SMA6.8AHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA6.8AHM3/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 P4SMA6.8AHM3/I?
For technical support, including P4SMA6.8AHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA6.8AHM3/I requirements.
6.How does Aetrix verify that P4SMA6.8AHM3/I is sourced from the original manufacturer or authorized distributors?
All P4SMA6.8AHM3/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 P4SMA6.8AHM3/I meets industry standards.
7.What is the process for return or replacement of P4SMA6.8AHM3/I?
All P4SMA6.8AHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA6.8AHM3/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 P4SMA6.8AHM3/I part is unused and in its original packaging.
Return procedure for P4SMA6.8AHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA6.8AHM3/I Tags
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