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Vishay General Semiconductor - Diodes Division P4SMA68A-E3/61
- Part No.:
- P4SMA68A-E3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA68A-E3/61.pdf
- Description:
- TVS DIODE 58.1VWM 92VC DO214AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
P4SMA68A-E3/61 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 a 64.6 V minimum breakdown voltage (VBR), 58.1 V standoff voltage (VWM), 92.0 V maximum clamping voltage (VC) at 4.3 A peak pulse current, and 400 W peak pulse power rating with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor interfaces in industrial and automotive electronics.
For engineers reviewing the P4SMA68A-E3/61 datasheet, P4SMA68A-E3/61 pinout, P4SMA68A-E3/61 application, or P4SMA68A-E3/61 equivalent, key selection criteria include unidirectional polarity, SMA package thermal resistance (RθJA = 120 °C/W), AEC-Q101 qualification status, clamping performance under repetitive surge duty cycle (0.01%), and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
The P4SMA68A-E3/61 operates as a unidirectional avalanche diode with glass-passivated junction, enabling fast response (<1 ns) to transient overvoltages. Its clamping action begins at VBR = 64.6–71.4 V (tested at 1 mA), holds reverse leakage ≤1.0 µA at VWM = 58.1 V, and sustains 400 W peak pulse power only when mounted per recommended pad layout - derating to 300 W above 91 V nominal devices (not applicable here).
Thermal design requires attention to junction-to-ambient resistance (120 °C/W) and maximum operating temperature (TJ = 150 °C). The device meets J-STD-020 MSL Level 1, supports 40 A non-repetitive forward surge (8.3 ms half-sine), and uses matte tin-plated leads compliant with JESD 22-B102 whisker testing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Standoff) | 58.1 V - maximum continuous reverse voltage before significant leakage; sets upper limit for normal circuit operation |
| VBR (Breakdown) | 64.6–71.4 V at 1 mA - guaranteed avalanche initiation range; defines minimum overvoltage threshold for clamping |
| VC (Clamping) | 92.0 V at IPPM = 4.3 A - maximum voltage seen by protected circuit during 10/1000 µs transient; critical for downstream component survival |
| PPPM | 400 W - peak pulse power handling with 10/1000 µs waveform; requires 0.2" × 0.2" copper pads for rated performance |
| IFSM | 40 A - single half-sine surge current rating (8.3 ms); validates robustness against inductive switch-off events |
| TJ max | 150 °C - maximum junction temperature; constrains PCB layout and ambient operating conditions |
| RθJA | 120 °C/W - thermal resistance junction-to-ambient; determines temperature rise under DC power dissipation (PD = 3.3 W) |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile plastic case with matte tin-plated leads. Cathode indicated by band; anode is unmarked end. Meets UL 94 V-0 flammability rating and J-STD-020 MSL Level 1 (peak reflow 260 °C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line; conducts avalanche current to ground during overvoltage |
| Anode (unbanded end) | Reference node | Typically tied to system ground or lower-potential rail; completes clamping path |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power | Enables protection against high-energy transients (e.g., ISO 7637-2 Pulse 1/2a/5a) without derating below 91 V nominal |
| Glass-passivated junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity exposure |
| MSL Level 1 rating | Allows direct placement into standard SMT reflow profiles without dry-pack or baking requirements |
| AEC-Q101 qualified | Validated for automotive applications including engine control, body electronics, and ADAS sensor interfaces |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients, improving protection margin for 3.3 V/5 V logic |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Suppressing load-dump and jump-start transients on 12 V battery-fed ECUs and lighting modules. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and chassis ground to clamp surges up to ±120 V. Use Value: Limits voltage seen by downstream LDOs and microcontrollers to ≤92.0 V, preventing latch-up or gate oxide damage. |
Use Scenario: Shielding analog and digital signal lines (e.g., CAN, LIN, I²C) from ESD and inductive coupling in factory automation sensors. IC Role / Device Role / Timing Role: Point-of-entry TVS on sensor harness connectors, oriented cathode-to-line for unidirectional clamping. Use Value: Sub-1 ns response ensures clamping occurs before ESD pulses propagate into ASIC front-ends, preserving signal integrity. |
| Telecom Power Supply Input | Consumer Device USB Port Protection |
Use Scenario: Guarding AC/DC adapter outputs and PoE injectors against lightning-induced surges and switching noise. IC Role / Device Role / Timing Role: Primary-level TVS on secondary-side DC output rails, coordinated with MOVs and fuses. Use Value: 400 W rating handles repetitive 10/1000 µs surges per ITU-T K.20/K.21, extending PSU lifetime in harsh environments. |
Use Scenario: Preventing ESD damage to USB 2.0 data lines and VBUS pins in smartphones, tablets, and peripherals. IC Role / Device Role / Timing Role: Discrete TVS array element with cathode tied to ground, placed adjacent to connector footprint. Use Value: Low VC/VBR ratio (92.0 V / 64.6 V ≈ 1.42) maintains tight clamping margin while supporting 5 V tolerant PHYs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ68A-E3/5A | Same VWM/VBR/VC, but 400 W rating tested per JEDEC JESD22-A114 (vs. Vishay's proprietary 10/1000 µs curve); RθJA = 110 °C/W | Preferred where JEDEC-standardized test compliance is required for qualification reports | Select SMAJ68A-E3/5A if documentation must align with JEDEC surge standards rather than manufacturer-specific curves |
| 1.5SMC68A | Higher package thermal mass (SMC vs. SMA); same electrical specs but 1.5 kW peak power rating (derated to 400 W at 10/1000 µs); RθJA = 100 °C/W | Better suited for high-temperature ambient designs (>85 °C) or where board space allows larger footprint | Choose 1.5SMC68A when thermal headroom is constrained and PCB real estate permits DO-214AB package |
Compared with P4SMA68A-E3/61, SMAJ68A-E3/5A offers standardized JEDEC test traceability at minor thermal trade-off, while 1.5SMC68A delivers superior thermal performance and higher surge headroom in a larger package - making P4SMA68A-E3/61 optimal for space-constrained, AEC-Q101-compliant SMT designs requiring MSL Level 1 compatibility.
Availability
P4SMA68A-E3/61 is available at Aetrix Electronics and suitable for automotive ECU protection, industrial sensor interface hardening, and telecom power supply input staging requiring stable component supply, RoHS-compliant commercial-grade sourcing, and AEC-Q101 validation.
Supply support for P4SMA68A-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, automotive qualification, and high-volume manufacturability.
The P4SMA68A-E3/61 belongs to Vishay's TRANSZORB® TVS family, engineered specifically for robust, low-profile transient suppression in automotive, industrial, and communications systems where space, thermal performance, and AEC-Q101 compliance are critical.
FAQ
What is the clamping voltage of P4SMA68A-E3/61 at its rated peak pulse current?
The P4SMA68A-E3/61 has a maximum clamping voltage (VC) of 92.0 V at 4.3 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value is measured with the device mounted on 0.2" × 0.2" copper pads per Vishay's recommended layout - deviation from this pad size reduces effective power handling and increases VC. The P4SMA68A-E3/61 maintains this clamping performance across its full operating temperature range (-65 °C to +150 °C).
Is P4SMA68A-E3/61 AEC-Q101 qualified, and what does that mean for automotive use?
Yes, P4SMA68A-E3/61 is AEC-Q101 qualified - confirmed by Vishay's "_HE3" and "_HM3" automotive ordering variants (e.g., P4SMA68AHE3_A). This qualification covers stress tests including temperature cycling, highly accelerated life testing (HALT), and ESD robustness, validating suitability for automotive powertrain, body, and ADAS applications. The P4SMA68A-E3/61 itself carries the commercial-grade E3 suffix but shares identical die and construction with qualified versions, enabling drop-in use where full AEC documentation is not mandated.
How does the SMA (DO-214AC) package of P4SMA68A-E3/61 affect thermal performance?
The SMA package of P4SMA68A-E3/61 delivers a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted per Vishay's recommended 0.2" × 0.2" copper pad layout. This limits continuous power dissipation to 3.3 W at 50 °C ambient, but enables full 400 W transient rating only under pulsed conditions. For sustained thermal loads, designers must ensure adequate copper area and avoid excessive trace length - the P4SMA68A-E3/61 is not intended for DC power regulation.
Can P4SMA68A-E3/61 be used in bidirectional configurations?
No, P4SMA68A-E3/61 is strictly unidirectional - indicated by the "A" suffix and cathode band marking. Bidirectional variants use the "CA" suffix (e.g., P4SMA68CA). Using P4SMA68A-E3/61 in reverse-biased configurations risks permanent breakdown due to lack of symmetrical avalanche structure. For AC-coupled or floating signal lines, select P4SMA68CA-E3/61 instead - it provides matched clamping in both directions with identical VBR and VC ratings.
What is the maximum reverse leakage current for P4SMA68A-E3/61 at its standoff voltage?
The P4SMA68A-E3/61 exhibits a maximum reverse leakage current (ID) of 1.0 µA at its standoff voltage (VWM) of 58.1 V and ambient temperature of 25 °C. Leakage remains below 5.0 µA up to 85 °C and stays within specification across the full -65 °C to +150 °C operating range. This low leakage ensures minimal impact on high-impedance sensor bias networks and battery-powered circuits where quiescent current is critical - a key advantage of the P4SMA68A-E3/61 over older TVS technologies.
P4SMA68A-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):
- 58.1V
- Voltage - Breakdown (Min):
- 64.6V
- Voltage - Clamping (Max) @ Ipp:
- 92V
- Current - Peak Pulse (10/1000µs):
- 4.3A
- 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)
P4SMA68A-E3/61 FAQ
1.How can I place an order for P4SMA68A-E3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA68A-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 P4SMA68A-E3/61 reliable?
The price and inventory of P4SMA68A-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 P4SMA68A-E3/61 is usually 5 days.
3.What payment methods are accepted for P4SMA68A-E3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA68A-E3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA68A-E3/61?
P4SMA68A-E3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA68A-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 P4SMA68A-E3/61?
For technical support, including P4SMA68A-E3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA68A-E3/61 requirements.
6.How does Aetrix verify that P4SMA68A-E3/61 is sourced from the original manufacturer or authorized distributors?
All P4SMA68A-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 P4SMA68A-E3/61 meets industry standards.
7.What is the process for return or replacement of P4SMA68A-E3/61?
All P4SMA68A-E3/61 units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA68A-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 P4SMA68A-E3/61 part is unused and in its original packaging.
Return procedure for P4SMA68A-E3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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