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Vishay General Semiconductor - Diodes Division P4SMA6.8CAHM3_A/I
- Part No.:
- P4SMA6.8CAHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA6.8CAHM3_A/I.pdf
- Description:
- TVS DIODE 5.8VWM 10.5VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,944
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Product details
Overview
P4SMA6.8CAHM3_A/I 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 stand-off 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) - used to protect MOSFETs, ICs, and sensor interfaces against inductive switching surges and ESD.
For engineers reviewing the P4SMA6.8CAHM3_A/I datasheet, P4SMA6.8CAHM3_A/I pinout, P4SMA6.8CAHM3_A/I application, or P4SMA6.8CAHM3_A/I equivalent, this device is selected for automotive-grade transient protection where AEC-Q101 qualification, halogen-free RoHS compliance, low clamping ratio (VC/VBR ≈ 1.54), and MSL Level 1 reflow capability are required.
Technical Context
The P4SMA6.8CAHM3_A/I operates as a bidirectional avalanche diode with symmetrical clamping behavior in both polarities, enabling protection of AC-coupled or differential signal paths without polarity constraints. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1000 µA at VWM), while its 120 °C/W junction-to-ambient thermal resistance supports operation up to 150 °C junction temperature.
It delivers fast response time (<1 ns) and low incremental surge resistance, maintaining clamping performance under repetitive 10/1000 µs transients at 0.01% duty cycle. The device is rated for 400 W peak pulse power below 91 V and derates linearly above that threshold per Figure 2 in the datasheet.
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 initiation window for reliable overvoltage triggering |
| VWM | 5.8 V - maximum continuous reverse operating voltage before leakage exceeds 1000 µA; sets safe margin below VBR |
| VC @ IPPM | 10.5 V at 38.1 A - clamping voltage during 400 W transient; determines protected circuit's maximum stress level |
| IPPM | 38.1 A - peak current survivable under 10/1000 µs waveform; defines surge handling capacity for inductive load spikes |
| PPPM | 400 W - peak pulse power rating; enables robust protection against lightning-induced or relay-switching transients |
| TJ max. | +150 °C - maximum junction temperature; supports operation in under-hood automotive and industrial environments |
| AEC-Q101 | Qualified - certified for automotive electronics per stress-test requirements including HTOL, TCT, and ESD HBM/MM |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, halogen-free, RoHS-compliant, MSL Level 1 (260 °C peak reflow). Dimensions: 4.93 mm × 3.99 mm × 2.29 mm (L × W × H); cathode band absent (bidirectional).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (negative polarity) | One terminal of symmetrical avalanche junction; conducts during negative transients |
| Cathode | Transient current entry (positive polarity) | Other terminal of symmetrical avalanche junction; conducts during positive transients |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC, differential, or floating signal lines without polarity concerns |
| 400 W peak pulse power (10/1000 µs) | Handles high-energy transients from relay coils, solenoids, and motor commutation in automotive ECUs |
| AEC-Q101 qualified + HM3 suffix | Validated for automotive use with extended temperature cycling, humidity, and lifetime reliability testing |
| Low clamping ratio (VC/VBR = 1.54) | Minimizes voltage overshoot across protected ICs, reducing risk of latch-up or gate oxide damage |
| MSL Level 1, 260 °C peak reflow | Supports standard lead-free SMT assembly without pre-baking or special handling |
Applications
| Automotive Sensor Interface Protection | Industrial CAN Bus Line Protection |
|---|---|
|
Use Scenario: Protecting analog sensor outputs (e.g., pressure, temperature) in engine control modules from load dump and alternator ripple. IC Role / Device Role / Timing Role: Bidirectional TVS placed across differential sensor pair or supply rail to clamp ±200 V transients. Use Value: Prevents sensor IC damage during ISO 7637-2 Pulse 5a (load dump) and maintains signal integrity via low VC. |
Use Scenario: Safeguarding CANH/CANL lines in vehicle body control units against ESD and inductive coupling from nearby power circuits. IC Role / Device Role / Timing Role: TVS connected line-to-line and line-to-ground to suppress common-mode and differential-mode transients. Use Value: Ensures CAN communication continuity during ISO 10605 ESD events (±8 kV contact) without bus shutdown. |
| Consumer Power Adapter Input Stage | Telecom DSL Line Surge Protection |
|
Use Scenario: Clamping input surges on 5–12 V DC adapters exposed to mains transients or hot-plug events. IC Role / Device Role / Timing Role: Bidirectional TVS placed between VIN and GND to limit voltage excursions during IEC 61000-4-5 1.2/50 µs surges. Use Value: Absorbs up to 400 W transient energy while holding output-side voltage below 11 V, protecting downstream regulators. |
Use Scenario: Protecting ADSL/VDSL line drivers and receivers from lightning-induced surges on twisted-pair copper lines. IC Role / Device Role / Timing Role: TVS deployed in hybrid coupler interface to shunt common-mode surges before transformer isolation. Use Value: Maintains <10.5 V clamping across 38.1 A pulses, preventing damage to sensitive line interface ICs per ITU-T K.20/K.21. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ6.8CA | Higher 600 W PPPM, larger SMB (DO-214AA) package, 11.2 V VC at 34.4 A | Preferred for higher-energy surges where board space allows larger footprint | Select when >400 W surge margin is needed and PCB layout accommodates 5.3 mm × 4.6 mm outline |
| 1.5KE6.8CA | Through-hole TO-218 package, 1500 W PPPM, 10.5 V VC at 143 A, no AEC-Q101 | Suitable for prototyping or legacy through-hole designs; not automotive-qualified | Choose only for non-automotive, high-power, non-SMT applications where reflow compatibility is irrelevant |
Compared with SMBJ6.8CA and 1.5KE6.8CA, the P4SMA6.8CAHM3_A/I offers optimal balance of AEC-Q101 compliance, SMT scalability, and 400 W protection in the smallest standardized surface-mount TVS package - making it the preferred choice for volume automotive and industrial PCBs requiring halogen-free, MSL Level 1 assembly.
Availability
P4SMA6.8CAHM3_A/I is available at Aetrix Electronics and suitable for automotive ECU design, industrial CAN node development, and telecom line card production requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for P4SMA6.8CAHM3_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 automotive-grade qualification.
The P4SMA series targets cost-sensitive, high-volume transient protection needs in automotive, industrial, and consumer electronics - delivering AEC-Q101-compliant TVS performance in compact SMA packages optimized for automated SMT assembly.
FAQ
What is the breakdown voltage tolerance for P4SMA6.8CAHM3_A/I?
The P4SMA6.8CAHM3_A/I has a specified breakdown voltage (VBR) range of 6.45 V to 7.14 V at 10 mA test current, representing a ±5% tolerance around the nominal 6.8 V rating. This tight distribution ensures consistent clamping behavior across production lots and supports predictable circuit protection design. The VBR value is measured per ANSI/IEEE C62.35 and verified during 100% production testing for each P4SMA6.8CAHM3_A/I unit.
Is P4SMA6.8CAHM3_A/I suitable for automotive applications?
Yes, P4SMA6.8CAHM3_A/I is AEC-Q101 qualified and carries the HM3 suffix indicating halogen-free, RoHS-compliant construction with automotive-grade reliability validation. It meets stress tests including high-temperature operating life (HTOL), temperature cycling (TCT), and ESD (HBM ≥ 8 kV, MM ≥ 400 V), making it approved for use in engine control units, body electronics, and ADAS sensor modules per P4SMA6.8CAHM3_A/I datasheet revision 09-Jan-2024.
What is the maximum clamping voltage of P4SMA6.8CAHM3_A/I under surge conditions?
The P4SMA6.8CAHM3_A/I exhibits a maximum clamping voltage (VC) of 10.5 V at its rated peak pulse current (IPPM) of 38.1 A, tested with a 10/1000 µs waveform. This value represents the highest voltage imposed on the protected circuit during worst-case transient events and is critical for ensuring downstream ICs remain within absolute maximum ratings. VC is guaranteed across the full operating temperature range (−65 °C to +150 °C).
Does P4SMA6.8CAHM3_A/I have polarity markings?
No, P4SMA6.8CAHM3_A/I does not feature polarity markings because it is a bidirectional TVS diode - its internal structure provides symmetrical avalanche conduction in both directions. Unlike unidirectional variants (e.g., P4SMA6.8A), the CA-suffixed version has no cathode band or anode indicator, simplifying placement on PCBs with AC or differential signal paths. This absence of marking is explicitly confirmed in the mechanical data section of the P4SMA6.8CAHM3_A/I datasheet.
What is the thermal resistance of P4SMA6.8CAHM3_A/I?
The P4SMA6.8CAHM3_A/I has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on minimum recommended copper pads (0.2" × 0.2" per terminal), and a junction-to-lead resistance (RθJL) of 30 °C/W. These values define power derating curves in Figure 2 of the datasheet and confirm the device can dissipate 3.3 W continuously at 50 °C ambient - essential for thermal design validation in enclosed automotive or industrial enclosures.
P4SMA6.8CAHM3_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:
- -
- 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_A/I FAQ
1.How can I place an order for P4SMA6.8CAHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA6.8CAHM3_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 P4SMA6.8CAHM3_A/I reliable?
The price and inventory of P4SMA6.8CAHM3_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 P4SMA6.8CAHM3_A/I is usually 5 days.
3.What payment methods are accepted for P4SMA6.8CAHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA6.8CAHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA6.8CAHM3_A/I?
P4SMA6.8CAHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA6.8CAHM3_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 P4SMA6.8CAHM3_A/I?
For technical support, including P4SMA6.8CAHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA6.8CAHM3_A/I requirements.
6.How does Aetrix verify that P4SMA6.8CAHM3_A/I is sourced from the original manufacturer or authorized distributors?
All P4SMA6.8CAHM3_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 P4SMA6.8CAHM3_A/I meets industry standards.
7.What is the process for return or replacement of P4SMA6.8CAHM3_A/I?
All P4SMA6.8CAHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA6.8CAHM3_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 P4SMA6.8CAHM3_A/I part is unused and in its original packaging.
Return procedure for P4SMA6.8CAHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA6.8CAHM3_A/I Tags
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