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Vishay General Semiconductor - Diodes Division P4SMA6.8A-M3/61
- Part No.:
- P4SMA6.8A-M3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA6.8A-M3/61.pdf
- Description:
- TVS DIODE 5.8VWM 10.5VC DO214AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
P4SMA6.8A-M3/61 from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping voltage transients on power and signal lines. It features 6.45 V to 7.14 V breakdown voltage at 10 mA test current, 5.80 V standoff voltage, 1000 µA max reverse leakage at VWM, 38.1 A peak pulse current (10/1000 µs), and 10.5 V clamping voltage at IPPM - used in automotive sensor protection and industrial I/O interface surge suppression.
For engineers reviewing the P4SMA6.8A-M3/61 datasheet, P4SMA6.8A-M3/61 pinout, P4SMA6.8A-M3/61 application, or P4SMA6.8A-M3/61 equivalent, key selection criteria include unidirectional polarity, SMA package thermal resistance (RθJA = 120 °C/W), AEC-Q101 qualification status, halogen-free RoHS compliance (M3 suffix), and 400 W peak pulse power rating with 10/1000 µs waveform.
Technical Context
The P4SMA6.8A-M3/61 operates as a silicon avalanche diode with glass-passivated junction, delivering fast response time (<1 ns) and low incremental surge resistance to suppress ESD and inductive switching transients. Its unidirectional configuration enables cathode-referenced clamping on DC rails and single-polarity signal paths.
It meets MSL Level 1 per J-STD-020 with 260 °C reflow peak temperature tolerance and supports automated SMT placement. The device is rated for TJ = -65 °C to +150 °C operation and derates linearly above TA = 25 °C per Figure 2 in the datasheet.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage VBR | 6.45 V to 7.14 V at IT = 10 mA - defines minimum voltage at which avalanche conduction begins under transient stress |
| Standoff Voltage VWM | 5.80 V - maximum continuous reverse operating voltage before significant leakage occurs |
| Clamping Voltage VC | 10.5 V at IPPM = 38.1 A (10/1000 µs) - peak voltage seen by protected circuit during worst-case surge |
| Peak Pulse Power PPPM | 400 W (10/1000 µs waveform) - energy-handling capability for short-duration transients without failure |
| Reverse Leakage ID | 1000 µA max at VWM = 5.80 V - ensures minimal standby power loss and signal integrity in high-impedance circuits |
| Thermal Resistance RθJA | 120 °C/W - determines junction temperature rise under steady-state power dissipation on standard PCB pads |
| AEC-Q101 Qualified | Yes (M3 suffix denotes halogen-free, RoHS-compliant, AEC-Q101 qualified version) |
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 marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; connected to ground or lower-potential node in unidirectional TVS configuration | Enables clamping when transient drives cathode above anode by >VBR; must be routed to lowest-impedance return path |
| Cathode | Current exit terminal in forward bias; marked with band; connected to line being protected | Provides low-impedance shunt path to ground during overvoltage events; polarity-critical for unidirectional operation |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 µs) | Supports robust protection against IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) on 12 V automotive supply rails |
| Glass passivated chip junction | Ensures stable VBR over lifetime and improved reliability vs. epoxy-passivated alternatives in humid environments |
| MSL Level 1 moisture sensitivity | Eliminates bake requirement prior to reflow; compatible with standard SMT assembly lines up to 260 °C peak |
| Halogen-free & RoHS-compliant (M3) | Fulfills automotive OEM material compliance requirements including GMW3172 and Ford WSS-M99P9999-A1 |
| Low profile SMA package | Enables compact layout in space-constrained modules such as ADAS camera ECUs and motor control gate drivers |
Applications
| Automotive Sensor Interface Protection | Industrial PLC Digital Input Protection |
|---|---|
Use Scenario: Protecting LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load dump and ISO 7637-2 pulses in engine control units. IC Role / Device Role / Timing Role: Unidirectional TVS placed between sensor signal line and chassis ground to clamp transients before they reach precision amplifier inputs. Use Value: Limits voltage excursion to ≤10.5 V during 38.1 A surge, preventing latch-up or damage to 5 V rail-tolerant ADC front-ends. |
Use Scenario: Safeguarding 24 V digital input channels in programmable logic controllers exposed to relay coil flyback and field wiring ESD. IC Role / Device Role / Timing Role: Mounted across input terminals to divert induced surges away from optocoupler input LEDs and series current-limiting resistors. Use Value: Withstands repetitive 400 W pulses at 0.01% duty cycle, enabling reliable operation in factory automation environments with frequent switching noise. |
| Consumer Power Adapter Output Clamping | Telecom Line Card Surge Suppression |
Use Scenario: Secondary-side overvoltage protection on 5 V/9 V USB-C PD adapter outputs subjected to capacitor discharge transients during hot-plug events. IC Role / Device Role / Timing Role: Placed between VBUS and GND downstream of DC-DC converter to absorb residual spikes not filtered by LC stages. Use Value: Achieves <1 ns response time and 10.5 V clamping, maintaining USB specification compliance while reducing need for oversized output capacitors. |
Use Scenario: Front-end protection for Ethernet PHY interfaces and POTS line drivers in network edge equipment handling lightning-induced surges. IC Role / Device Role / Timing Role: Used in conjunction with gas discharge tubes (GDTs) as secondary clamping stage to limit let-through voltage after primary spark gap conduction. Use Value: Provides precise 10.5 V clamping threshold with tight VBR tolerance (±5%), ensuring predictable coordination with upstream protectors in multi-stage architectures. |
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, 6.45–7.14 V VBR, but rated for 400 W at 10/1000 µs and 1000 µA ID at VWM - identical electrical specs; differs only in branding and minor process variation | No functional difference; accepted as direct replacement in legacy designs qualified with SMAJ6.8A | Select P4SMA6.8A-M3/61 when halogen-free and AEC-Q101 qualification are mandatory; SMAJ6.8A lacks M3 suffix and formal automotive qualification |
| 1.5SMC6.8A | Larger SMC (DO-214AB) package, same VBR/VWM/VC specs, but higher RθJA = 150 °C/W and 1.5 kW peak power rating - physically incompatible footprint | Used where board space allows larger package and higher single-pulse energy handling is required (e.g., AC mains input stages) | Choose P4SMA6.8A-M3/61 for space-constrained SMT layouts requiring SMA footprint; 1.5SMC6.8A requires PCB redesign and offers no benefit for typical 400 W applications |
Compared with SMAJ6.8A, P4SMA6.8A-M3/61 adds halogen-free construction and AEC-Q101 qualification without sacrificing clamping performance; versus 1.5SMC6.8A, it delivers identical protection in 30% smaller area but trades off ultimate single-pulse energy capacity for compactness and automotive compliance.
Availability
P4SMA6.8A-M3/61 is available at Aetrix Electronics and suitable for automotive sensor protection, industrial PLC input conditioning, and consumer power adapter output clamping requiring stable component supply, long-term lifecycle support, and full traceability.
Supply support for P4SMA6.8A-M3/61 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-grade qualification.
The P4SMA Series targets cost-sensitive, high-volume transient suppression needs in automotive, industrial, and telecom systems - engineered for automated assembly, AEC-Q101 compliance, and consistent clamping performance across temperature and life cycles.
FAQ
What is the polarity configuration of the P4SMA6.8A-M3/61?
The P4SMA6.8A-M3/61 is a unidirectional Transient Voltage Suppressor. Its cathode is marked with a band on the SMA package body, and it conducts only when the cathode voltage exceeds the anode by more than the breakdown voltage (6.45–7.14 V). This configuration makes it suitable for DC rail protection where polarity is fixed, unlike bidirectional variants that suppress both positive and negative transients.
Does the P4SMA6.8A-M3/61 meet AEC-Q101 qualification requirements?
Yes, the P4SMA6.8A-M3/61 is AEC-Q101 qualified. The "M3" suffix explicitly denotes halogen-free, RoHS-compliant construction with full AEC-Q101 stress testing including HTGB, HTRB, TCT, and ESD. This qualification is documented in Vishay's official datasheet revision 09-Jan-2024 (Document Number: 88367), confirming suitability for automotive under-hood and cabin applications.
What is the maximum clamping voltage of the P4SMA6.8A-M3/61 under surge conditions?
The maximum clamping voltage VC of the P4SMA6.8A-M3/61 is 10.5 V at a peak pulse current IPPM of 38.1 A, tested with the standard 10/1000 µs double-exponential waveform. This value represents the highest voltage the protected circuit will experience during a worst-case transient event, making it critical for ensuring compatibility with 5 V or 3.3 V ICs downstream.
Can the P4SMA6.8A-M3/61 be used in bidirectional signal line protection?
No, the P4SMA6.8A-M3/61 is strictly unidirectional and unsuitable for bidirectional signal lines such as RS-485 or CAN. For those applications, Vishay specifies bidirectional variants with "CA" suffix (e.g., P4SMA6.8CA), which have symmetrical breakdown characteristics in both directions. Using P4SMA6.8A-M3/61 on AC or differential signals would result in unintended forward conduction and potential damage.
What is the thermal resistance and how does it affect PCB layout for the P4SMA6.8A-M3/61?
The P4SMA6.8A-M3/61 has a typical junction-to-ambient thermal resistance RθJA of 120 °C/W when mounted on 0.2" x 0.2" (5.0 mm x 5.0 mm) copper pads per terminal. To maintain safe junction temperatures during repetitive surges, designers must provide adequate copper area and avoid excessive trace length or isolation - undersized pads increase thermal impedance and risk exceeding the 150 °C max TJ rating.
P4SMA6.8A-M3/61 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-M3/61 FAQ
1.How can I place an order for P4SMA6.8A-M3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA6.8A-M3/61 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-M3/61 reliable?
The price and inventory of P4SMA6.8A-M3/61 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-M3/61 is usually 5 days.
3.What payment methods are accepted for P4SMA6.8A-M3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA6.8A-M3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA6.8A-M3/61?
P4SMA6.8A-M3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA6.8A-M3/61 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-M3/61?
For technical support, including P4SMA6.8A-M3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA6.8A-M3/61 requirements.
6.How does Aetrix verify that P4SMA6.8A-M3/61 is sourced from the original manufacturer or authorized distributors?
All P4SMA6.8A-M3/61 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-M3/61 meets industry standards.
7.What is the process for return or replacement of P4SMA6.8A-M3/61?
All P4SMA6.8A-M3/61 units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA6.8A-M3/61, 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-M3/61 part is unused and in its original packaging.
Return procedure for P4SMA6.8A-M3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA6.8A-M3/61 Tags
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