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Vishay General Semiconductor - Diodes Division P4SMA68AHE3_A/H
- Part No.:
- P4SMA68AHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA68AHE3_A/H.pdf
- Description:
- TVS DIODE 58.1VWM 92VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,190
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Product details
Overview
P4SMA68AHE3_A/H from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, rated for 68 V breakdown voltage (VBR = 64.6–71.4 V at IT = 1.0 mA), 58.1 V standoff voltage (VWM), and 92.0 V clamping voltage (VC) at 4.3 A peak pulse current (IPPM). It delivers 400 W peak pulse power (10/1000 µs waveform) and is AEC-Q101 qualified for automotive electronics protection.
For engineers reviewing the P4SMA68AHE3_A/H datasheet, P4SMA68AHE3_A/H pinout, P4SMA68AHE3_A/H application, or P4SMA68AHE3_A/H equivalent, this device is selected for robust overvoltage protection of DC power rails and signal lines in harsh environments-especially where automotive-grade reliability, low clamping ratio, and fast response (<1 ns) are required.
Technical Context
The P4SMA68AHE3_A/H operates as a unidirectional avalanche diode, conducting only when reverse voltage exceeds its specified breakdown threshold. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low incremental surge resistance, enabling precise clamping with minimal overshoot during transient events.
Designed for surface-mount assembly on standard 0.2" × 0.2" copper pads, it meets MSL Level 1 per J-STD-020 (peak reflow ≤ 260 °C) and supports repetitive surge duty cycles up to 0.01%. Thermal resistance is RθJA = 120 °C/W (typical), limiting continuous power dissipation to 3.3 W at TA = 50 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 64.6 V / 71.4 V at 1.0 mA test current - defines precise avalanche initiation window for repeatable clamping behavior |
| VWM | 58.1 V - maximum continuous reverse operating voltage before leakage exceeds 1.0 µA |
| VC @ IPPM | 92.0 V at 4.3 A - clamping voltage under 10/1000 µs surge, yielding clamping ratio of 1.59 (VC/VWM) |
| PPPM | 400 W - peak pulse power handling capability, derated above 25 °C per Fig. 2 |
| IFSM | 40 A - non-repetitive forward surge current rating (8.3 ms half-sine), critical for input-stage protection |
| Junction Temp Range | −65 °C to +150 °C - enables operation in under-hood automotive and industrial ambient conditions |
| AEC-Q101 Qualified | Yes - validated for automotive applications including engine control units and body electronics |
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 | Forward conduction terminal | Connected to system ground or lower-potential rail in unidirectional TVS configuration |
| Cathode | Reverse-biased clamping terminal | Connected to protected line (e.g., 12 V supply or CAN_H); conducts during overvoltage transients |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR over temperature and lifetime, with <0.1 %/°C drift coefficient |
| 400 W peak pulse power (10/1000 µs) | Protects against ISO 7637-2 Pulse 1, 2a, 3a/b, and IEC 61000-4-5 surges without degradation |
| AEC-Q101 qualification | Validated for automotive use including temperature cycling, humidity bias, and mechanical shock testing |
| MSL Level 1 moisture sensitivity | Enables standard SMT reflow without baking; compatible with high-volume automated placement |
| Low clamping ratio (1.59) | Minimizes stress on downstream ICs during ESD/EFT events by limiting voltage overshoot |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump and alternator transients per ISO 16750-2. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power input and ground, clamping spikes within nanoseconds. Use Value: Withstands 400 W surges and maintains VC ≤ 92.0 V, preventing damage to MCU power supplies and LDOs. |
Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) from ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance TVS connected across differential pair or single-ended output to ground. Use Value: Fast response (<1 ns) and 92.0 V clamping preserve signal integrity while meeting IEC 61000-4-2 Level 4 (15 kV air). |
| Telecom DC Power Input Protection | Consumer Device USB Port Protection |
Use Scenario: Safeguarding 48 V PoE-powered equipment inputs against lightning-induced surges. IC Role / Device Role / Timing Role: Primary TVS on DC input rail upstream of DC-DC converter, configured unidirectionally. Use Value: 58.1 V VWM allows full 48 V nominal operation; 400 W rating handles multi-kA induced surges. |
Use Scenario: Adding secondary-level surge immunity to USB VBUS lines in portable chargers and accessories. IC Role / Device Role / Timing Role: Unidirectional clamp between VBUS and GND, sized for 5 V system margin. Use Value: AEC-Q101 qualification ensures long-term reliability in consumer devices exposed to frequent hot-plug events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ68A-E3/5A | Same VBR range (64.6–71.4 V), but rated for 400 W at 25 °C only; no AEC-Q101 qualification | Commercial-grade use only; not approved for automotive production | Select P4SMA68AHE3_A/H when automotive qualification, extended temperature validation, or traceable sourcing is required |
| 1.5SMC68A | Higher package thermal mass (DO-214AB), RθJA = 100 °C/W; same electrical specs but larger footprint | Preferred where board space permits and higher thermal inertia improves surge endurance | Choose P4SMA68AHE3_A/H for space-constrained designs needing SMA footprint and AEC-Q101 compliance |
Compared with SMAJ68A-E3/5A and 1.5SMC68A, the P4SMA68AHE3_A/H uniquely combines AEC-Q101 qualification, SMA (DO-214AC) compactness, and verified 400 W surge capability-making it optimal for automotive and high-reliability industrial PCBs where layout density and qualification rigor are both critical.
Availability
P4SMA68AHE3_A/H is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor interfaces, telecom power inputs, and consumer USB protection requiring stable component supply, full traceability, and lifecycle continuity.
Supply support for P4SMA68AHE3_A/H 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 validation.
The P4SMA Series is designed specifically for robust transient suppression in automotive, industrial, and telecom systems-delivering consistent clamping performance, AEC-Q101 compliance, and surface-mount manufacturability in the SMA package.
FAQ
What is the clamping voltage of P4SMA68AHE3_A/H at its rated peak pulse current?
The P4SMA68AHE3_A/H 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 per Figure 1 in the Vishay datasheet (Doc. #88367) and reflects actual device behavior during surge events-not a theoretical limit. The P4SMA68AHE3_A/H maintains this clamping performance across its qualified temperature range and after multiple surge cycles when operated within derating guidelines.
Is P4SMA68AHE3_A/H suitable for bidirectional signal line protection?
No, P4SMA68AHE3_A/H is a unidirectional TVS diode, indicated by the "A" suffix and cathode band marking. It conducts only in reverse bias and must be oriented with cathode toward the protected line. For bidirectional protection (e.g., RS-485, CAN), use the "CA" variant such as P4SMA68CAHE3_A/H. Using P4SMA68AHE3_A/H on AC-coupled or symmetrical lines risks forward conduction and failure during normal operation.
Does P4SMA68AHE3_A/H meet automotive qualification standards?
Yes, P4SMA68AHE3_A/H is explicitly AEC-Q101 qualified, as confirmed in the Vishay P4SMA Series datasheet (Rev. 09-Jan-2024, Section "MECHANICAL DATA"). The "HE3" suffix denotes RoHS-compliant and AEC-Q101 qualified construction. This qualification covers stress tests including temperature cycling, high-temperature reverse bias, and mechanical shock-validating suitability for engine control, body electronics, and ADAS modules.
What is the standoff voltage (VWM) of P4SMA68AHE3_A/H, and why does it matter?
The standoff voltage (VWM) of P4SMA68AHE3_A/H is 58.1 V-this is the maximum continuous reverse voltage the device can block without exceeding 1.0 µA leakage current. It matters because VWM must exceed the system's normal operating voltage (e.g., 12 V or 48 V rail) with sufficient margin to prevent false triggering. For a 48 V telecom system, P4SMA68AHE3_A/H provides 10.1 V headroom, ensuring stable operation during ripple and transients below clamping threshold.
How does the thermal resistance of P4SMA68AHE3_A/H affect its power handling?
P4SMA68AHE3_A/H has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W. At 50 °C ambient, this limits continuous power dissipation (PD) to 3.3 W-well below its 400 W surge rating. During transient events, heat is absorbed capacitively by the junction; sustained power must stay within RθJA-governed limits. Proper PCB copper pad design (0.2" × 0.2" per terminal) is essential to achieve the rated 400 W pulse performance.
P4SMA68AHE3_A/H 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
P4SMA68AHE3_A/H FAQ
1.How can I place an order for P4SMA68AHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA68AHE3_A/H 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 P4SMA68AHE3_A/H reliable?
The price and inventory of P4SMA68AHE3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA68AHE3_A/H is usually 5 days.
3.What payment methods are accepted for P4SMA68AHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA68AHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA68AHE3_A/H?
P4SMA68AHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA68AHE3_A/H 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 P4SMA68AHE3_A/H?
For technical support, including P4SMA68AHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA68AHE3_A/H requirements.
6.How does Aetrix verify that P4SMA68AHE3_A/H is sourced from the original manufacturer or authorized distributors?
All P4SMA68AHE3_A/H 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 P4SMA68AHE3_A/H meets industry standards.
7.What is the process for return or replacement of P4SMA68AHE3_A/H?
All P4SMA68AHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA68AHE3_A/H, 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 P4SMA68AHE3_A/H part is unused and in its original packaging.
Return procedure for P4SMA68AHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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