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Vishay General Semiconductor - Diodes Division P4SMA6.8A-E3/61
- Part No.:
- P4SMA6.8A-E3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA6.8A-E3/61.pdf
- Description:
- TVS DIODE 5.8VWM 10.5VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:15,112
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Product details
Overview
P4SMA6.8A-E3/61 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 consumer and industrial signal-line protection.
For engineers reviewing the P4SMA6.8A-E3/61 datasheet, P4SMA6.8A-E3/61 pinout, P4SMA6.8A-E3/61 application, or P4SMA6.8A-E3/61 equivalent, key selection considerations include its SMA (DO-214AC) package compatibility, unidirectional polarity with cathode band marking, low 1000 µA reverse leakage at VWM, and AEC-Q101 qualification eligibility via HE3 suffix variants.
Technical Context
The P4SMA6.8A-E3/61 operates as a clamping-type TVS diode using an avalanche junction structure, activated when transient voltage exceeds its 6.45–7.14 V breakdown threshold. Its glass-passivated chip junction ensures stable VBR tolerance (±5%) and fast response time (<1 ns), enabling effective suppression of ESD and inductive switching spikes.
Thermally, it exhibits RθJA = 120 °C/W and RθJL = 30 °C/W, with maximum junction temperature rated at +150 °C and operating range from –65 °C to +150 °C. It is rated for 40 A non-repetitive forward surge current (8.3 ms half-sine) and derates linearly above 25 °C ambient per Figure 2.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 6.45 V / 7.14 V at 10 mA - defines precise avalanche turn-on window for reliable clamping onset |
| VWM | 5.8 V - maximum continuous reverse working voltage before leakage rises significantly |
| IPPM | 38.1 A (10/1000 µs) - peak transient current it safely shunts without failure |
| VC | 10.5 V at IPPM - clamped voltage seen by protected circuit during worst-case surge |
| PPPM | 400 W (10/1000 µs) - peak transient energy absorption capability under standard waveform |
| ID @ VWM | 1000 µA - reverse leakage at stand-off voltage, critical for low-power sensor line integrity |
| TJ max | +150 °C - maximum junction temperature supporting operation in high-ambient industrial environments |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile plastic case with matte tin-plated leads; meets UL 94 V-0 and J-STD-002 solderability standards. Polarity indicated by cathode band on unidirectional devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / transient return path | Connected to ground or low-impedance return in unidirectional configuration; must be routed with minimal inductance |
| Cathode | Protected line connection / transient sink | Connected to the line being protected (e.g., USB D+, RS-485 A); cathode band identifies this terminal |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 µs) | Enables robust protection against IEC 61000-4-5 Level 3 surges (1 kV/2 Ω) on 3.3 V–5 V signal lines |
| Glass passivated junction | Ensures long-term VBR stability and low parameter drift across temperature and lifetime |
| MSL Level 1 (260 °C peak reflow) | Supports standard lead-free SMT assembly without moisture sensitivity concerns or baking requirements |
| AEC-Q101 qualification option (HE3 suffix) | Validates reliability for automotive subsystems including body control modules and infotainment interfaces |
| Low incremental surge resistance | Minimizes clamping voltage overshoot during fast-rising transients (e.g., ESD >15 kV contact discharge) |
Applications
| USB 2.0 Data Lines | Automotive Sensor Interfaces |
|---|---|
|
Use Scenario: Protecting D+ and D– lines in USB host/peripheral ports from ESD and cable-induced transients. IC Role / Device Role: Unidirectional clamping TVS placed between data line and ground, with cathode tied to signal. Use Value: Clamps 8 kV HBM ESD events to ≤10.5 V, preserving signal integrity and preventing PHY damage while adding <0.5 pF capacitance. |
Use Scenario: Safeguarding LIN bus or analog sensor outputs (e.g., temperature, pressure) in engine bay modules. IC Role / Device Role: Primary overvoltage clamp on sensor supply or signal output, referenced to chassis ground. Use Value: Withstands 40 A surge (8.3 ms) and suppresses load-dump induced spikes up to 10.5 V, meeting ISO 7637-2 Pulse 1/2a requirements. |
| Industrial PLC I/O Channels | Consumer Appliance Control Boards |
|
Use Scenario: Protecting digital input channels (24 V DC) from field-wiring transients and relay coil kickback. IC Role / Device Role: Standoff-rated TVS (VWM = 5.8 V) used in series with current-limiting resistor for 24 V logic inputs. Use Value: Blocks normal 24 V operation while clamping 1 kV/42 Ω surges to safe levels-enabling use with 3.3 V microcontrollers via level-shifting. |
Use Scenario: Shielding microcontroller GPIOs and communication lines (I²C, UART) in washing machines and HVAC controllers. IC Role / Device Role: Low-leakage (1000 µA) unidirectional TVS on 3.3 V or 5 V rails near connectors and switches. Use Value: Prevents latch-up and gate oxide damage from user-interface ESD without increasing standby current or affecting sleep-mode performance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ6.8A (Bourns) | Same VBR range (6.45–7.14 V), but SMB package (DO-214AA) - 2.6 mm wider, higher thermal mass | Higher IPPM (64.8 A) and PPPM (600 W), yet larger footprint limits dense PCB layouts | Select when higher surge margin is required and board space allows SMB's 4.5 × 3.9 mm outline |
| 1.5SMC6.8A (ON Semiconductor) | Identical electrical specs (VBR, VC, PPPM) but SMC (DO-214AB) package - 7.1 mm length vs. SMA's 4.3 mm | Higher RθJA (100 °C/W) and lower mounting density; not MSL Level 1 rated | Choose only if legacy SMC footprint compatibility is mandatory and reflow profile permits non-MSL1 handling |
Compared with SMBJ6.8A and 1.5SMC6.8A, the P4SMA6.8A-E3/61 offers optimal balance of compact SMA footprint, MSL Level 1 process compatibility, and verified 400 W surge capability-making it preferred for space-constrained, high-volume automated assembly in consumer and industrial designs.
Availability
P4SMA6.8A-E3/61 is available at Aetrix Electronics and suitable for USB interface protection, automotive sensor circuits, industrial PLC I/O modules, and consumer appliance control boards requiring stable component supply and RoHS-compliant sourcing.
Supply support for P4SMA6.8A-E3/61 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, rectifiers, MOSFETs, and protection devices with emphasis on reliability, precision, and automotive-grade qualification.
The P4SMA6.8A-E3/61 belongs to Vishay's TRANSZORB® TVS family, engineered specifically for cost-effective, high-speed transient suppression in space-sensitive surface-mount applications across automotive, industrial, and computing markets.
FAQ
What is the breakdown voltage tolerance of the P4SMA6.8A-E3/61?
The P4SMA6.8A-E3/61 has a specified breakdown voltage 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 VBR distribution ensures consistent clamping behavior across production lots and supports reliable design margining in 3.3 V and 5 V systems where overvoltage thresholds must be precisely controlled. The P4SMA6.8A-E3/61 achieves this via glass passivation and tightly controlled wafer processing.
Is the P4SMA6.8A-E3/61 suitable for automotive applications?
The base P4SMA6.8A-E3/61 is RoHS-compliant and commercial-grade; however, the automotive-qualified variant P4SMA6.8AHE3_A is AEC-Q101 qualified and shares identical electrical specs. For automotive use, specify the HE3 suffix to ensure stress-tested reliability for under-hood and body electronics. The P4SMA6.8A-E3/61 itself is not AEC-Q101 certified, so direct substitution in automotive designs requires validation of the HE3 version.
What is the maximum clamping voltage of the P4SMA6.8A-E3/61 under surge conditions?
The P4SMA6.8A-E3/61 clamps to a maximum of 10.5 V when subjected to its rated 38.1 A peak pulse current (10/1000 µs waveform). This clamping voltage is guaranteed across temperature and lifetime, and represents the highest voltage the protected circuit will experience during a full-rated transient event. Designers use this value-alongside system-level voltage tolerances-to confirm safe operation of downstream ICs like USB transceivers or microcontroller I/O pins.
Does the P4SMA6.8A-E3/61 have polarity markings, and how is it oriented on the PCB?
Yes-the P4SMA6.8A-E3/61 is unidirectional and marked with a cathode band at one end of the SMA (DO-214AC) package. During PCB layout, the cathode (banded end) connects to the line being protected (e.g., USB D+), while the anode connects to ground. Incorrect orientation renders the device ineffective for reverse-polarity transients; forward conduction only occurs during positive surges relative to ground. The P4SMA6.8A-E3/61 datasheet confirms polarity via mechanical drawing and electrical symbol.
How does the P4SMA6.8A-E3/61 perform under elevated ambient temperatures?
The P4SMA6.8A-E3/61 derates linearly above 25 °C ambient: its peak pulse power drops to ~300 W at +85 °C and ~200 W at +125 °C per Figure 2 in the Vishay datasheet. This thermal derating is critical for under-hood or enclosed industrial applications. Designers must verify that worst-case surge energy remains within the derated PPPM envelope-and confirm junction temperature stays below +150 °C using RθJA = 120 °C/W. The P4SMA6.8A-E3/61 maintains full VBR and leakage specs across its –65 °C to +150 °C operating range.
P4SMA6.8A-E3/61 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-E3/61 FAQ
1.How can I place an order for P4SMA6.8A-E3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA6.8A-E3/61 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-E3/61 reliable?
The price and inventory of P4SMA6.8A-E3/61 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-E3/61 is usually 5 days.
3.What payment methods are accepted for P4SMA6.8A-E3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA6.8A-E3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA6.8A-E3/61?
P4SMA6.8A-E3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA6.8A-E3/61 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-E3/61?
For technical support, including P4SMA6.8A-E3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA6.8A-E3/61 requirements.
6.How does Aetrix verify that P4SMA6.8A-E3/61 is sourced from the original manufacturer or authorized distributors?
All P4SMA6.8A-E3/61 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-E3/61 meets industry standards.
7.What is the process for return or replacement of P4SMA6.8A-E3/61?
All P4SMA6.8A-E3/61 units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA6.8A-E3/61, 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-E3/61 part is unused and in its original packaging.
Return procedure for P4SMA6.8A-E3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA6.8A-E3/61 Tags
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