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Vishay General Semiconductor - Diodes Division P4SMA68CAHE3_A/I
- Part No.:
- P4SMA68CAHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA68CAHE3_A/I.pdf
- Description:
- TVS DIODE 58.1VWM 92VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,116
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Product details
Overview
P4SMA68CAHE3_A/I from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping voltage transients on signal and power lines. It features a 58.1 V standoff voltage (VWM), 64.6–71.4 V breakdown voltage (VBR) at 1 mA, 92.0 V maximum clamping voltage (VC) at 4.3 A peak pulse current (IPPM), and 400 W peak pulse power (10/1000 µs waveform), targeting protection of MOSFETs, ICs, and sensor interfaces in automotive and industrial systems.
For engineers reviewing the P4SMA68CAHE3_A/I datasheet, P4SMA68CAHE3_A/I pinout, P4SMA68CAHE3_A/I application, or P4SMA68CAHE3_A/I equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, 150 °C max junction temperature, low incremental surge resistance, and compatibility with automated SMT assembly on standard PCB pad layouts.
Technical Context
The P4SMA68CAHE3_A/I operates as a bidirectional avalanche diode, symmetrically clamping transient overvoltages in both polarities without polarity marking. Its glass-passivated junction ensures stable breakdown characteristics and fast response time (<1 ns), while its low Rdyn minimizes voltage overshoot during high-di/dt events.
Rated for 400 W peak pulse power (10/1000 µs) at 25 °C - derated linearly above TA = 25 °C per Fig. 2 - it delivers 3.3 W steady-state power dissipation and supports repetitive surge duty cycles up to 0.01 %, with thermal resistance RθJA = 120 °C/W and RθJL = 30 °C/W under defined mounting conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 58.1 V - maximum continuous reverse working voltage before significant leakage; defines safe operating margin below clamping threshold |
| VBR (Breakdown Voltage) | 64.6–71.4 V at 1 mA - precise avalanche initiation range; ensures predictable turn-on during transients |
| VC (Clamping Voltage) | 92.0 V at IPPM = 4.3 A - peak voltage seen by protected circuit during 10/1000 µs surge; critical for downstream device survivability |
| PPPM (Peak Pulse Power) | 400 W (10/1000 µs) - transient energy absorption capacity; enables robust protection against IEC 61000-4-5 Level 3 surges |
| ID (Reverse Leakage) | 1.0 µA at VWM - ultra-low leakage preserves signal integrity and minimizes standby power loss in high-impedance circuits |
| TJ max | 150 °C - maximum junction temperature rating; supports operation in under-hood automotive and industrial ambient environments |
| AEC-Q101 Qualified | Yes - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD; suitable for ASIL-B supporting subsystems |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile plastic case with matte tin-plated leads; meets UL 94 V-0, J-STD-002 solderability, and JESD 201 Class 2 whisker resistance. Bidirectional configuration has no polarity marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (negative polarity) | One terminal of symmetrical avalanche junction; conducts during negative transients relative to cathode reference |
| Cathode | Transient current entry (positive polarity) | Other terminal of symmetrical junction; conducts during positive transients; bidirectional symmetry eliminates need for orientation |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity constraints or external biasing |
| 400 W peak pulse power (10/1000 µs) | Supports IEC 61000-4-5 surge immunity testing up to 1 kV line-to-ground with 2 Ω source impedance |
| AEC-Q101 qualified | Validated for automotive electronics including engine control modules, body controllers, and ADAS sensor interfaces |
| Glass passivated junction | Ensures long-term parameter stability and low leakage drift across temperature and lifetime stress conditions |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles without moisture sensitivity concerns or baking requirements |
Applications
| Automotive Sensor Interface Protection | Industrial CAN Bus Line Protection |
|---|---|
Use Scenario: Protecting analog output lines of pressure, temperature, and position sensors in engine bay and chassis modules exposed to load dump and inductive switching noise. IC Role / Device Role / Timing Role: Bidirectional TVS clamping element placed directly at connector entry point to shunt transients before reaching precision ADC front-end or microcontroller GPIO. Use Value: Maintains signal fidelity under ISO 7637-2 Pulse 5a (load dump) and Pulse 1/2b (inductive switch-off), preventing latch-up or permanent damage to 12-bit sensor signal chains. |
Use Scenario: Safeguarding CAN_H/CAN_L differential pair in factory automation PLCs and motor drives subjected to ground bounce and EFT bursts. IC Role / Device Role / Timing Role: Low-capacitance (≈50 pF typical at VWM) bidirectional clamp mounted at bus termination to suppress common-mode surges without distorting 1 Mbps CAN FD waveforms. Use Value: Limits clamped voltage to ≤92 V during 400 W surges, preserving physical layer integrity and meeting ISO 11898-2 EMC immunity requirements without adding propagation delay. |
| Consumer Power Adapter Input Stage | Telecom DSL Line Card Surge Protection |
Use Scenario: Secondary-side transient suppression on 5–24 V DC outputs of wall adapters and USB PD chargers facing accidental short-circuit recovery spikes and hot-plug events. IC Role / Device Role / Timing Role: Fast-response (sub-nanosecond) TVS placed after DC-DC converter output filter to protect downstream USB-C controller and battery management ICs. Use Value: Clamps 100 V+ transients to 92 V within nanoseconds, preventing overvoltage shutdown or gate oxide rupture in 20 V-rated FETs and LDOs. |
Use Scenario: Primary protection for ADSL/VDSL line interface ICs handling mixed analog/digital signals on twisted-pair copper lines vulnerable to lightning-induced surges. IC Role / Device Role / Timing Role: First-stage bidirectional clamp on tip/ring inputs, coordinated with GDT and series impedance to meet ITU-T K.20/K.21 telecom surge standards. Use Value: Absorbs 400 W surge energy while holding clamping voltage below 95 V, enabling robust front-end design without sacrificing signal-to-noise ratio in 30 MHz DSL bands. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ64CA | Higher VWM (64 V), lower VC (103 V at 3.5 A), SMB package (larger footprint, higher RθJA = 140 °C/W) | Less suitable for space-constrained automotive modules; better for higher-energy surges where board area permits larger pads | Select when 64 V standoff is required and PCB layout allows SMB footprint; not drop-in due to different package and thermal profile |
| 1.5KE68CA | Through-hole DO-201 package, same VWM/VC specs but higher PPPM (1500 W), slower response due to higher junction capacitance | Preferred for legacy industrial power supplies where manual assembly or high-surge redundancy is prioritized over SMT density | Choose only for through-hole designs requiring >1 kW surge handling; incompatible with automated SMT lines and high-frequency signal paths |
Compared with SMBJ64CA and 1.5KE68CA, the P4SMA68CAHE3_A/I offers optimal balance of AEC-Q101 compliance, compact SMA footprint, and 400 W surge capability - making it the preferred choice for new automotive and space-limited industrial designs requiring RoHS-compliant, surface-mount TVS protection.
Availability
P4SMA68CAHE3_A/I is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial CAN bus nodes, consumer power adapter outputs, and telecom DSL line cards requiring stable component supply, AEC-Q101 traceability, and consistent surge performance across production lots.
Supply support for P4SMA68CAHE3_A/I 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 passive components with emphasis on reliability, efficiency, and application-specific optimization.
The P4SMA Series is engineered for high-reliability transient suppression in automotive, industrial, and telecom infrastructure - delivering standardized TVS performance with AEC-Q101 qualification, low-profile SMT packaging, and rigorous surge endurance validation.
FAQ
What is the clamping voltage of the P4SMA68CAHE3_A/I at its rated peak pulse current?
The P4SMA68CAHE3_A/I has a maximum clamping voltage (VC) of 92.0 V at its specified peak pulse current (IPPM) of 4.3 A under the standard 10/1000 µs waveform. This value is measured per Figure 1 in the Vishay datasheet (Document Number: 88367) and represents the upper voltage limit imposed on protected circuitry during worst-case surge events. The P4SMA68CAHE3_A/I maintains this clamping performance across its full operating temperature range when mounted per recommended pad layout.
Is the P4SMA68CAHE3_A/I suitable for automotive applications?
Yes, the P4SMA68CAHE3_A/I is explicitly AEC-Q101 qualified, as confirmed in the Vishay P4SMA Series datasheet revision 09-Jan-2024. Its qualification covers temperature cycling, highly accelerated life testing (HALT), and ESD robustness - making it appropriate for under-hood and cabin electronics such as engine control units, ADAS camera modules, and body control modules. The P4SMA68CAHE3_A/I also meets MSL Level 1 and RoHS compliance requirements for automotive manufacturing.
What does the "CA" suffix indicate in P4SMA68CAHE3_A/I?
The "CA" suffix in P4SMA68CAHE3_A/I denotes a bidirectional Transient Voltage Suppressor configuration. Unlike unidirectional variants (e.g., P4SMA68A), the CA version provides symmetrical clamping in both polarities - essential for protecting AC-coupled lines, differential buses like CAN or RS-485, and floating sensor outputs. The device has no polarity marking, and both terminals function identically as anode/cathode depending on transient polarity.
What is the thermal resistance of the P4SMA68CAHE3_A/I, and how does it affect PCB layout?
The P4SMA68CAHE3_A/I 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, as specified in the Vishay datasheet. This value assumes minimal copper area; increasing pad size or adding thermal vias reduces RθJA and improves surge repetition capability. For reliable 400 W pulse handling, designers must follow the recommended SMA (DO-214AC) mounting pad layout to avoid thermal derating penalties.
How does the P4SMA68CAHE3_A/I compare to unidirectional P4SMA68A in terms of circuit implementation?
The P4SMA68CAHE3_A/I differs fundamentally from the unidirectional P4SMA68A in polarity handling: the CA variant requires no orientation during placement and protects both positive and negative transients with identical VWM (58.1 V) and VC (92.0 V) values, whereas the unidirectional P4SMA68A has a cathode band and only clamps positive surges relative to its marked cathode. The P4SMA68CAHE3_A/I simplifies layout for bidirectional signal paths but exhibits slightly higher leakage than unidirectional types at the same VWM.
P4SMA68CAHE3_A/I 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:
- -
- Bidirectional Channels:
- 1
- 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)
P4SMA68CAHE3_A/I FAQ
1.How can I place an order for P4SMA68CAHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA68CAHE3_A/I 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 P4SMA68CAHE3_A/I reliable?
The price and inventory of P4SMA68CAHE3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA68CAHE3_A/I is usually 5 days.
3.What payment methods are accepted for P4SMA68CAHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA68CAHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA68CAHE3_A/I?
P4SMA68CAHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA68CAHE3_A/I 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 P4SMA68CAHE3_A/I?
For technical support, including P4SMA68CAHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA68CAHE3_A/I requirements.
6.How does Aetrix verify that P4SMA68CAHE3_A/I is sourced from the original manufacturer or authorized distributors?
All P4SMA68CAHE3_A/I 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 P4SMA68CAHE3_A/I meets industry standards.
7.What is the process for return or replacement of P4SMA68CAHE3_A/I?
All P4SMA68CAHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA68CAHE3_A/I, 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 P4SMA68CAHE3_A/I part is unused and in its original packaging.
Return procedure for P4SMA68CAHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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