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Vishay General Semiconductor - Diodes Division P4SMA6.8CAHM3/H
- Part No.:
- P4SMA6.8CAHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA6.8CAHM3/H.pdf
- Description:
- TVS DIODE 5.8VWM 10.5VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:9,660
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Product details
Overview
P4SMA6.8CAHM3/H from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping voltage transients on signal and power lines. It features a 6.8 V breakdown voltage (VBR), 5.8 V standoff voltage (VWM), 400 W peak pulse power (10/1000 µs), 38.1 A peak pulse current (IPPM), and 10.5 V maximum clamping voltage (VC) - deployed in automotive sensor interfaces, industrial I/O protection, and telecom line surge suppression.
For engineers reviewing the P4SMA6.8CAHM3/H datasheet, P4SMA6.8CAHM3/H pinout, P4SMA6.8CAHM3/H application, or P4SMA6.8CAHM3/H equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, halogen-free RoHS compliance, low clamping ratio (VC/VBR ≈ 1.54), and MSL Level 1 moisture sensitivity for reflow compatibility.
Technical Context
This device operates as a voltage-clamped transient protector with symmetrical bidirectional avalanche behavior - no polarity marking required. Its glass-passivated junction ensures stable breakdown characteristics and fast response time (<1 ns), while the SMA package supports automated placement and meets UL 94 V-0 flammability rating.
Rated for -65 °C to +150 °C operating junction temperature, it delivers 400 W peak pulse power at 25 °C (derated above TA = 25 °C per Fig. 2), with thermal resistance RθJA = 120 °C/W and RθJL = 30 °C/W. The HM3 suffix confirms halogen-free, RoHS-compliant, and AEC-Q101-qualified construction.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 6.45 V / 7.14 V at 10 mA test current - defines precise avalanche onset threshold for reliable overvoltage triggering |
| VWM | 5.8 V - maximum continuous reverse working voltage before leakage exceeds 1000 µA |
| VC @ IPPM | 10.5 V at 38.1 A - clamping voltage during 400 W 10/1000 µs surge, limiting downstream stress |
| PPPM | 400 W - peak pulse power handling under standard 10/1000 µs waveform, duty cycle ≤ 0.01 % |
| IPPM | 38.1 A - maximum non-repetitive surge current supported without failure |
| TJ max | +150 °C - enables operation in under-hood automotive and high-ambient industrial environments |
| Package | SMA (DO-214AC) - surface-mount outline with 5.0 mm × 5.0 mm copper pad requirement for thermal performance |
Pinout & Package
SMA (DO-214AC) package: molded plastic case with matte tin-plated leads, J-STD-002 solderable, MSL Level 1 (260 °C peak reflow), UL 94 V-0 rated. Bidirectional configuration - no cathode/anode marking; terminals are symmetric and interchangeable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode / Cathode (bidirectional) | Either terminal serves as input/output path - symmetrical conduction in both directions during transient events |
| Terminal 2 | Anode / Cathode (bidirectional) | Paired terminal completing the bidirectional TVS path; no polarity dependency in PCB layout |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness |
| Halogen-free & RoHS-compliant (HM3) | Meets JEDEC JESD201 Class 2 whisker resistance and environmental compliance mandates |
| 400 W peak pulse power (10/1000 µs) | Supports IEC 61000-4-5 Level 4 surge immunity (4 kV line-to-line) in compact footprint |
| Low clamping ratio (VC/VBR ≈ 1.54) | Minimizes voltage overshoot across protected ICs, reducing risk of latch-up or gate oxide damage |
| Fast response time (< 1 ns) | Engages before most semiconductor switching transients propagate, preserving signal integrity |
Applications
| Automotive Sensor Interface Protection | Industrial PLC Digital I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus nodes and analog sensor inputs (e.g., pressure, temperature) from load dump and inductive kickback in 12 V vehicle systems. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across differential signal pair or supply rail to shunt transient energy to ground. Use Value: Prevents permanent damage to MCU ADC inputs and transceiver PHY layers during ISO 7637-2 Pulse 1/2a/5a events. |
Use Scenario: Safeguarding 24 V digital input modules in programmable logic controllers against field-wiring surges and relay contact bounce. IC Role / Device Role / Timing Role: Parallel-connected TVS across input optocoupler or Schmitt trigger input to limit voltage excursion during EFT bursts. Use Value: Maintains functional safety integrity per IEC 61000-4-4 (EFT) and IEC 61000-4-5 (surge) without degrading DC input threshold stability. |
| Telecom Line Surge Suppression | Consumer USB/USB-C Port ESD Clamping |
Use Scenario: Front-end protection of Ethernet PHYs, RS-485 transceivers, and DSL line drivers exposed to lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Primary clamping device mounted at connector entry point, coordinated with GDT or polymer PTC upstream. Use Value: Limits induced common-mode transients to <12 V peak, enabling robust operation per ITU-T K.21 Basic Level requirements. |
Use Scenario: Secondary-level ESD protection on USB 2.0/3.2 data lines and VBUS pins in portable electronics and docking stations. IC Role / Device Role / Timing Role: Fast-acting clamp between D+/D− and ground, or VBUS and ground, absorbing ±15 kV HBM ESD events. Use Value: Achieves IEC 61000-4-2 Level 4 (±8 kV contact / ±15 kV air) immunity while maintaining <0.5 pF line capacitance impact. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ6.8CA | Higher package thermal mass (SMB/DO-214AA); 600 W PPPM; VC = 11.2 V at 53.3 A | Better suited for higher-energy surges where board space allows larger footprint | Select when system-level surge testing exceeds 400 W or requires lower RθJA (80 °C/W) |
| 1.5KE6.8CA | Through-hole DO-15 package; 1500 W PPPM; VC = 12.6 V at 119 A | Used in legacy industrial power supplies and AC mains protection where SMT not feasible | Choose only for through-hole assembly or where >1 kW surge margin is mandatory |
Compared with SMBJ6.8CA and 1.5KE6.8CA, the P4SMA6.8CAHM3/H offers optimal balance of AEC-Q101 qualification, halogen-free compliance, and compact SMA footprint - making it preferred for space-constrained automotive and industrial SMT designs requiring certified reliability without over-spec'ing surge capacity.
Availability
P4SMA6.8CAHM3/H is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, and telecom line interface circuits requiring stable component supply, long-term lifecycle support, and traceable AEC-Q101-qualified sourcing.
Supply support for P4SMA6.8CAHM3/H 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, efficiency, and application-specific optimization.
The P4SMA Series targets cost-sensitive, high-volume transient protection needs across automotive, industrial, and communications markets - engineered for automated assembly, thermal robustness, and consistent clamping performance under repetitive surge stress.
FAQ
What is the breakdown voltage tolerance for P4SMA6.8CAHM3/H?
The P4SMA6.8CAHM3/H has a specified breakdown voltage (VBR) range of 6.45 V to 7.14 V at 10 mA test current, representing ±5% tolerance around the nominal 6.8 V rating. This tight distribution ensures predictable clamping onset across production lots and supports accurate system-level overvoltage margin analysis in the P4SMA6.8CAHM3/H design.
Is P4SMA6.8CAHM3/H suitable for automotive applications?
Yes, the P4SMA6.8CAHM3/H is AEC-Q101 qualified and carries the HM3 suffix indicating halogen-free, RoHS-compliant construction validated for automotive use. It meets requirements for temperature cycling, high-temperature reverse bias, and mechanical shock - making it appropriate for engine control units, body electronics, and ADAS sensor interfaces where the P4SMA6.8CAHM3/H provides certified surge resilience.
What is the maximum clamping voltage of P4SMA6.8CAHM3/H under surge conditions?
The P4SMA6.8CAHM3/H exhibits a maximum clamping voltage (VC) of 10.5 V at its rated peak pulse current (IPPM) of 38.1 A, measured using the standardized 10/1000 µs waveform. This value reflects worst-case voltage seen by downstream circuitry during a full-power transient event and is critical for ensuring the P4SMA6.8CAHM3/H maintains safe operating margins for 5 V or 3.3 V logic interfaces.
Does P4SMA6.8CAHM3/H require polarity-aware PCB layout?
No - the P4SMA6.8CAHM3/H is a bidirectional TVS diode with symmetrical terminal behavior; there is no cathode band or polarity marking on the SMA package. Either terminal may connect to the protected line or ground, simplifying layout and eliminating orientation errors during automated assembly of the P4SMA6.8CAHM3/H into high-density boards.
What is the thermal resistance of P4SMA6.8CAHM3/H and how does it affect derating?
The P4SMA6.8CAHM3/H has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on minimum recommended 5.0 mm × 5.0 mm copper pads. This value directly governs power derating above 25 °C ambient - for example, at 85 °C ambient, the P4SMA6.8CAHM3/H must be operated below ~1.8 W continuous dissipation to maintain TJ ≤ 150 °C, per the derating curve in Figure 2 of its datasheet.
P4SMA6.8CAHM3/H 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:
- -
- Bidirectional Channels:
- 1
- 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)
P4SMA6.8CAHM3/H FAQ
1.How can I place an order for P4SMA6.8CAHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA6.8CAHM3/H 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 P4SMA6.8CAHM3/H reliable?
The price and inventory of P4SMA6.8CAHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA6.8CAHM3/H is usually 5 days.
3.What payment methods are accepted for P4SMA6.8CAHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA6.8CAHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA6.8CAHM3/H?
P4SMA6.8CAHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA6.8CAHM3/H 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 P4SMA6.8CAHM3/H?
For technical support, including P4SMA6.8CAHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA6.8CAHM3/H requirements.
6.How does Aetrix verify that P4SMA6.8CAHM3/H is sourced from the original manufacturer or authorized distributors?
All P4SMA6.8CAHM3/H 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 P4SMA6.8CAHM3/H meets industry standards.
7.What is the process for return or replacement of P4SMA6.8CAHM3/H?
All P4SMA6.8CAHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA6.8CAHM3/H, 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 P4SMA6.8CAHM3/H part is unused and in its original packaging.
Return procedure for P4SMA6.8CAHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA6.8CAHM3/H Tags
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