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Vishay General Semiconductor - Diodes Division P4SMA68A-E3/5A
- Part No.:
- P4SMA68A-E3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA68A-E3/5A.pdf
- Description:
- TVS DIODE 58.1VWM 92VC DO214AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
P4SMA68A-E3/5A from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for robust overvoltage protection in power and signal lines. It features a 68 V breakdown voltage (VBR = 64.6–71.4 V at 1 mA), 58.1 V standoff voltage (VWM), clamps transients to ≤92 V at 4.3 A peak pulse current (10/1000 µs), and delivers 400 W peak pulse power - used to safeguard MOSFETs, ICs, and sensor interfaces against inductive switching surges and ESD in industrial and automotive electronics.
For engineers reviewing the P4SMA68A-E3/5A datasheet, P4SMA68A-E3/5A pinout, P4SMA68A-E3/5A application, or P4SMA68A-E3/5A equivalent, key selection criteria include its unidirectional polarity, SMA (DO-214AC) package compatibility with automated placement, AEC-Q101 qualification eligibility (via HE3/HM3 variants), UL 497B recognition, and thermal resistance (RθJA = 120 °C/W) under standard PCB pad layout.
Technical Context
The P4SMA68A-E3/5A operates as a clamping-type TVS diode with avalanche breakdown behavior, triggered when reverse voltage exceeds its specified VBR range. Its glass-passivated junction ensures stable leakage performance (<1 µA at VWM) and fast response time (<1 ns), enabling effective suppression of transient spikes induced by inductive load switching or lightning-induced surges.
It is rated for 400 W peak pulse power (10/1000 µs waveform) at TA = 25 °C, derating linearly above 25 °C per Fig. 2, and supports repetitive surge duty cycles up to 0.01 %. With a maximum clamping voltage of 92 V at 4.3 A and low incremental surge resistance, it maintains predictable voltage limiting during high-energy transients without latch-up or degradation under specified conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 64.6 V / 71.4 V at 1 mA - defines precise avalanche onset window for reliable overvoltage triggering |
| VWM | 58.1 V - maximum continuous reverse operating voltage before significant leakage begins |
| VC @ IPPM | ≤92 V at 4.3 A (10/1000 µs) - clamping voltage that determines protected circuit's worst-case stress level |
| PPPM | 400 W - peak transient energy absorption capacity under standardized surge waveform |
| IFSM | 40 A (8.3 ms half-sine) - surge current handling for unidirectional forward conduction events |
| TJ max | +150 °C - maximum junction temperature defining thermal design margin for PCB layout |
| RθJA | 120 °C/W - thermal resistance from junction to ambient, measured on 0.2" × 0.2" copper pads |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile 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 | Forward current entry / Reverse voltage reference node | Connected to lower-potential side of protected line; establishes polarity-dependent clamping direction |
| Cathode | Avalanche conduction terminal / Clamping output node | Connected to higher-potential side (e.g., VCC rail or signal line); sinks surge current to ground path |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 µs) | Enables protection against high-energy transients common in automotive load-dump and industrial motor drive environments |
| Glass passivated chip junction | Ensures stable leakage current (<1 µA at VWM) and long-term reliability under thermal cycling and humidity stress |
| MSL Level 1 (J-STD-020), 260 °C peak reflow | Supports standard lead-free SMT assembly without moisture-related popcorning or delamination |
| UL 497B recognized (QVGQ2, E136766) | Validates compliance for telecom and industrial surge protection systems requiring third-party safety certification |
| AEC-Q101 qualified variants available | Enables drop-in use in automotive ECUs where qualification to stress-test standards is mandatory |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed control modules from load-dump transients (ISO 7637-2 Pulse 5a) and alternator overshoot. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VBAT and ground to clamp surges above 58.1 V before reaching downstream regulators and microcontrollers. Use Value: Limits peak voltage to ≤92 V during 400 W transients, preventing damage to 36 V-rated input stages of PMICs and CAN transceivers. |
Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) from ESD and cable discharge events in factory automation PLCs. IC Role / Device Role / Timing Role: TVS mounted at connector entry point to shunt fast-rising transients (<1 ns rise time) before they couple into precision op-amp front-ends. Use Value: Maintains signal integrity by clamping sub-100 ns ESD pulses to <92 V while adding only ~10 pF junction capacitance at VWM. |
| Telecom Line Surge Suppression | Consumer Power Adapter Input Protection |
Use Scenario: Safeguarding Ethernet PHY power rails and data lines against lightning-induced surges per IEC 61000-4-5 (10/700 µs). IC Role / Device Role / Timing Role: Paired unidirectional TVS on +3.3 V supply and bidirectional variant on differential pairs to provide coordinated clamping. Use Value: Delivers 400 W pulse handling with <1 ns response, meeting immunity requirements for Class B telecom equipment without compromising bandwidth. |
Use Scenario: Overvoltage protection on AC-DC adapter primary-side rectifier outputs exposed to mains transients (IEC 61000-4-4). IC Role / Device Role / Timing Role: Placed across bulk capacitor to absorb line-to-ground surges exceeding 58.1 V, preventing capacitor overvoltage failure. Use Value: Absorbs 400 W surges without thermal runaway, supported by RθJA = 120 °C/W and 150 °C max junction rating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ64A (Bourns) | Higher VWM (64 V), same VBR range (67.2–74.4 V), SMB package (DO-214AA), 600 W PPPM | Larger footprint; better suited for higher-power layouts where space permits | Select when higher surge margin or legacy SMB footprint compatibility is required |
| 1.5KE68A (ON Semiconductor) | Through-hole DO-201 package, identical VWM/VBR/VC specs, 1500 W PPPM, higher IPPM (21.9 A) | Not SMT-compatible; used in prototyping, high-reliability legacy designs, or where manual assembly is acceptable | Choose for through-hole production or when >400 W surge headroom is needed without redesigning PCB |
Compared with SMBJ64A and 1.5KE68A, the P4SMA68A-E3/5A offers optimal balance of compact SMA packaging, AEC-Q101-ready variants, and 400 W capability - making it ideal for space-constrained, high-volume SMT applications where RoHS-compliant commercial-grade performance suffices.
Availability
P4SMA68A-E3/5A is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLC I/O protection, and telecom power supply designs requiring stable component supply, consistent tape-and-reel delivery (7500 pcs per 13" reel), and traceable RoHS-compliant sourcing.
Supply support for P4SMA68A-E3/5A 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, TVS devices, and optoelectronics with emphasis on reliability, efficiency, and application-specific optimization.
The P4SMA68A-E3/5A belongs to Vishay's TRANSZORB® TVS family, engineered for high-speed, high-energy transient suppression in automotive, industrial, and telecom infrastructure - prioritizing low clamping ratio, repeatable avalanche behavior, and robust SMT manufacturability.
FAQ
What is the maximum clamping voltage of the P4SMA68A-E3/5A under standard test conditions?
The P4SMA68A-E3/5A has a maximum clamping voltage (VC) of 92 V when subjected to its rated peak pulse current of 4.3 A using the 10/1000 µs waveform. This value is guaranteed per the Vishay datasheet (Document Number: 88367, Rev. 09-Jan-2024) and defines the upper voltage limit imposed on protected circuits during transient events. Designers must ensure downstream components tolerate this clamped voltage under worst-case surge conditions. The P4SMA68A-E3/5A achieves this with low incremental surge resistance and stable avalanche characteristics.
Is the P4SMA68A-E3/5A suitable for automotive applications requiring AEC-Q101 qualification?
The P4SMA68A-E3/5A itself is a commercial-grade part (E3 suffix denotes RoHS-compliant, non-automotive). However, Vishay offers AEC-Q101 qualified versions under ordering codes like P4SMA68AHE3_A, which share identical electrical specs but undergo additional stress testing. For automotive use, specify the HE3 or HM3 variant - the P4SMA68A-E3/5A should not be deployed in AEC-Q101-mandated systems unless requalified. Always verify qualification status via Vishay's official documentation before final design-in.
What is the standoff voltage (VWM) of the P4SMA68A-E3/5A, and why does it matter for circuit design?
The P4SMA68A-E3/5A has a standoff voltage (VWM) of 58.1 V, meaning it remains in high-impedance state below this reverse voltage, drawing less than 1 µA leakage current. This parameter is critical for ensuring the TVS does not interfere with normal circuit operation - for example, it allows safe placement on a 48 V DC bus without false triggering. Selecting a VWM ≥10–20 % above the system's maximum steady-state voltage prevents nuisance conduction while preserving margin for transients. The P4SMA68A-E3/5A's 58.1 V VWM supports 48 V nominal systems with robust headroom.
How does the SMA (DO-214AC) package of the P4SMA68A-E3/5A impact PCB layout and thermal performance?
The SMA package of the P4SMA68A-E3/5A measures 4.93 mm × 3.99 mm with 2.54 mm lead pitch, enabling dense SMT layouts while maintaining adequate creepage/clearance. Its thermal resistance is RθJA = 120 °C/W when mounted on 0.2" × 0.2" copper pads - meaning at 3.3 W steady-state dissipation, junction temperature rises ~400 °C above ambient (exceeding rating), so it's intended for transient-only duty. Layout must follow Vishay's recommended pad dimensions to ensure mechanical reliability and thermal derating compliance. The P4SMA68A-E3/5A's low profile also supports conformal coating and automated optical inspection.
Can the P4SMA68A-E3/5A be used in bidirectional configurations?
No - the P4SMA68A-E3/5A is strictly unidirectional, as indicated by the "A" suffix and cathode band marking. Bidirectional variants carry the "CA" suffix (e.g., P4SMA68CA) and lack polarity marking. Using the P4SMA68A-E3/5A in reverse-biased AC signal paths would result in forward conduction and potential failure. For bidirectional protection, select the P4SMA68CA or equivalent, which provides symmetrical clamping in both directions with matched VBR and VC. The P4SMA68A-E3/5A's design assumes DC or single-polarity transient scenarios only.
P4SMA68A-E3/5A 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-E3/5A FAQ
1.How can I place an order for P4SMA68A-E3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA68A-E3/5A 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-E3/5A reliable?
The price and inventory of P4SMA68A-E3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA68A-E3/5A is usually 5 days.
3.What payment methods are accepted for P4SMA68A-E3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA68A-E3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA68A-E3/5A?
P4SMA68A-E3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA68A-E3/5A 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-E3/5A?
For technical support, including P4SMA68A-E3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA68A-E3/5A requirements.
6.How does Aetrix verify that P4SMA68A-E3/5A is sourced from the original manufacturer or authorized distributors?
All P4SMA68A-E3/5A 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-E3/5A meets industry standards.
7.What is the process for return or replacement of P4SMA68A-E3/5A?
All P4SMA68A-E3/5A units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA68A-E3/5A, 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-E3/5A part is unused and in its original packaging.
Return procedure for P4SMA68A-E3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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