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Vishay General Semiconductor - Diodes Division P4SMA68CAHM3/I
- Part No.:
- P4SMA68CAHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA68CAHM3/I.pdf
- Description:
- TVS DIODE 58.1VWM 92VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,179
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Product details
Overview
P4SMA68CAHM3/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, and 400 W peak pulse power rating with 10/1000 µs waveform - suitable for protecting automotive sensor interfaces and industrial I/O lines.
For engineers reviewing the P4SMA68CAHM3/I datasheet, P4SMA68CAHM3/I pinout, P4SMA68CAHM3/I application, or P4SMA68CAHM3/I equivalent, this device delivers AEC-Q101 qualification, halogen-free RoHS compliance, MSL Level 1 moisture sensitivity, and verified clamping performance under repetitive surge conditions - critical for automotive-grade ESD and load-dump protection design validation.
Technical Context
The P4SMA68CAHM3/I operates as a bidirectional TVS diode with symmetrical avalanche clamping in both polarities, enabling transient suppression on AC-coupled or floating signal paths without polarity constraints. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 µA at VWM), while the SMA package supports automated SMT placement and meets UL 94 V-0 flammability requirements.
Thermally, it exhibits RθJA = 120 °C/W (junction-to-ambient) and RθJL = 30 °C/W (junction-to-lead), with a maximum operating junction temperature of +150 °C. Derating above 25 °C ambient follows Fig. 2 in the datasheet, and its 3.3 W steady-state power dissipation is defined at TA = 50 °C on infinite heatsink conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 58.1 V - Maximum continuous reverse voltage before significant leakage; defines safe operating margin below clamping threshold |
| VBR (Breakdown Voltage) | 64.6–71.4 V at 1 mA - Confirmed avalanche onset range; ensures predictable turn-on during overvoltage events |
| VC (Clamping Voltage) | 92.0 V at IPPM = 4.3 A - Peak voltage seen by protected circuit during 10/1000 µs surge; determines downstream component stress |
| PPPM (Peak Pulse Power) | 400 W - Sustained transient energy absorption capability per single 10/1000 µs pulse; rated at TA = 25 °C |
| IPPM (Peak Pulse Current) | 4.3 A - Maximum non-repetitive surge current the device can clamp without failure; derived from VC and PPPM |
| TJmax | +150 °C - Absolute maximum junction temperature; enables operation in under-hood automotive environments |
| AEC-Q101 Qualified | Yes - Validated for automotive electronic systems per stress test requirements including HTGB, HTRB, and temperature cycling |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, bidirectional configuration with no polarity marking. Dimensions: 4.93 mm × 3.99 mm × 2.29 mm (L × W × H); cathode band absent per bidirectional construction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (positive half-cycle) | One terminal of symmetrical avalanche junction; conducts during positive surges relative to other terminal |
| Anode / Cathode (shared) | Transient current return (negative half-cycle) | Same physical terminal serves as cathode during negative surges; bidirectional conduction path |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables protection of AC signals, differential buses, and floating nodes without external polarity management |
| 400 W peak pulse power (10/1000 µs) | Handles high-energy transients such as ISO 7637-2 Pulse 1/2a/5a in automotive applications |
| AEC-Q101 qualified (HM3 suffix) | Validated reliability for automotive electronics including engine control, ADAS sensors, and body modules |
| Halogen-free & RoHS-compliant | Meets environmental compliance requirements for global automotive and industrial OEM supply chains |
| MSL Level 1 (260 °C peak reflow) | Compatible with standard lead-free SMT reflow profiles without pre-baking or special handling |
Applications
| Automotive Sensor Protection | Industrial I/O Interface |
|---|---|
|
Use Scenario: Protecting CAN, LIN, or analog sensor outputs (e.g., pressure, temperature) from load dump and ESD in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional TVS clamping element placed directly at connector or IC input pins to limit transient voltage excursions. Use Value: Maintains signal integrity under ISO 16750-2 load dump (up to 120 V) and IEC 61000-4-2 ESD (±15 kV air), preventing latch-up or damage to MCU analog front-ends. |
Use Scenario: Safeguarding PLC digital input modules against field-wiring induced surges and ground bounce in factory automation. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 24 V DC input channels, positioned before optocoupler or Schmitt trigger input stage. Use Value: Limits transient voltage to ≤92.0 V during 400 W surges, ensuring reliable logic-level recognition and extending optocoupler lifetime. |
| Telecom Line Interface | Consumer Device USB/UART Lines |
|
Use Scenario: Shielding RS-485 transceivers in base station backhaul equipment from lightning-induced surges on long cable runs. IC Role / Device Role / Timing Role: Secondary protection device located after gas discharge tube (GDT) primary stage, providing fast-response clamping. Use Value: Responds in <1 ps to sub-microsecond transients, clamping residual voltage to 92.0 V before GDT crowbars - preserving transceiver data integrity. |
Use Scenario: ESD hardening of USB 2.0 D+/D− or UART TX/RX lines in smart home hubs and portable medical devices. IC Role / Device Role / Timing Role: Low-capacitance (typ. <100 pF at VWM) bidirectional TVS placed adjacent to connector to shunt ESD current away from PHY IC. Use Value: Passes IEC 61000-4-2 ±15 kV contact discharge with <1 ns response, preventing bit errors and interface lockup without signal distortion. |
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 (58.1 V vs. 55.1 V), same VC (92.0 V), larger SMB package (DO-214AA) | Lower board density; better thermal dissipation in high-duty-cycle scenarios | Select when PCB layout allows larger footprint and higher steady-state power handling is needed |
| 1.5KE68CA | Through-hole TO-218 package, identical VWM/VBR/VC, higher PPPM (1500 W) | Not suitable for automated SMT; used in legacy or high-reliability power supply designs | Choose only for through-hole prototyping or where manual assembly and higher surge margin are prioritized |
Compared with P4SMA68CAHM3/I, SMBJ64CA offers improved thermal performance in larger footprint applications, while 1.5KE68CA provides higher surge capacity but sacrifices SMT compatibility and board space efficiency - making P4SMA68CAHM3/I optimal for modern automotive and industrial SMT designs requiring AEC-Q101 compliance and compactness.
Availability
P4SMA68CAHM3/I is available at Aetrix Electronics and suitable for automotive sensor protection, industrial I/O interface hardening, and telecom line surge suppression requiring stable component supply across production lifecycles.
Supply support for P4SMA68CAHM3/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 and automotive-grade qualification.
The P4SMA Series is engineered for robust transient suppression in harsh environments, targeting automotive, industrial, and telecom applications where AEC-Q101 compliance, low-profile SMT packaging, and repeatable clamping performance are essential.
FAQ
What is the clamping voltage of P4SMA68CAHM3/I at its rated peak pulse current?
The P4SMA68CAHM3/I has a maximum clamping voltage (VC) of 92.0 V at its specified peak pulse current (IPPM) of 4.3 A, measured under the standardized 10/1000 µs double-exponential waveform. This value is guaranteed per the Vishay datasheet revision 09-Jan-2024 and defines the upper voltage limit imposed on protected circuits during surge events. The P4SMA68CAHM3/I maintains this clamping performance across its full operating temperature range.
Is P4SMA68CAHM3/I suitable for automotive applications?
Yes, P4SMA68CAHM3/I is AEC-Q101 qualified and carries the HM3 suffix indicating halogen-free, RoHS-compliant, and automotive-grade construction. It is validated for use in engine control units, ADAS sensor interfaces, and body electronics where resistance to thermal cycling, humidity, and mechanical shock is required. The P4SMA68CAHM3/I meets all stress tests defined in AEC-Q101 including HTGB, HTRB, and temperature cycling.
What does the "CA" suffix mean in P4SMA68CAHM3/I?
The "CA" suffix in P4SMA68CAHM3/I denotes a bidirectional Transient Voltage Suppressor configuration, meaning the device provides symmetrical clamping in both forward and reverse directions. Unlike unidirectional variants (e.g., P4SMA68AHM3/I), the P4SMA68CAHM3/I has no polarity marking and is used where AC signals, differential lines, or floating nodes require transient protection without directional biasing.
What is the standoff voltage (VWM) of P4SMA68CAHM3/I?
The standoff voltage (VWM) of P4SMA68CAHM3/I is 58.1 V - the maximum DC or RMS voltage that can be continuously applied without causing significant leakage current (≤1.0 µA). This parameter establishes the operational margin between normal system voltage and the onset of avalanche conduction. For P4SMA68CAHM3/I, VWM is selected to accommodate 48 V automotive systems and 24 V industrial rails with safety headroom.
Does P4SMA68CAHM3/I have moisture sensitivity level (MSL) rating?
Yes, P4SMA68CAHM3/I is rated MSL Level 1 per J-STD-020, with a maximum peak reflow temperature of 260 °C. This means the device can be exposed to unlimited floor life under standard factory conditions and requires no baking prior to soldering. The MSL Level 1 rating is confirmed in the Vishay P4SMA Series datasheet (Document Number: 88367, Revision: 09-Jan-2024) and applies specifically to the HM3 packaging variant of P4SMA68CAHM3/I.
P4SMA68CAHM3/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:
- Discontinued at Digi-Key
- 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:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
P4SMA68CAHM3/I FAQ
1.How can I place an order for P4SMA68CAHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA68CAHM3/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 P4SMA68CAHM3/I reliable?
The price and inventory of P4SMA68CAHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA68CAHM3/I is usually 5 days.
3.What payment methods are accepted for P4SMA68CAHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA68CAHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA68CAHM3/I?
P4SMA68CAHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA68CAHM3/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 P4SMA68CAHM3/I?
For technical support, including P4SMA68CAHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA68CAHM3/I requirements.
6.How does Aetrix verify that P4SMA68CAHM3/I is sourced from the original manufacturer or authorized distributors?
All P4SMA68CAHM3/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 P4SMA68CAHM3/I meets industry standards.
7.What is the process for return or replacement of P4SMA68CAHM3/I?
All P4SMA68CAHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA68CAHM3/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 P4SMA68CAHM3/I part is unused and in its original packaging.
Return procedure for P4SMA68CAHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA68CAHM3/I Tags
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