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Vishay General Semiconductor - Diodes Division P4SMA12CA-M3/61
- Part No.:
- P4SMA12CA-M3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA12CA-M3/61.pdf
- Description:
- TVS DIODE 10.2VWM 16.7VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:8,195
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Product details
Overview
P4SMA12CA-M3/61 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 12 V breakdown voltage (VBR = 11.4–12.6 V at 1 mA), 10.2 V maximum standoff voltage (VWM), 16.7 V clamping voltage (VC) at 24.0 A peak pulse current, and 400 W peak pulse power rating with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor signal lines in industrial and automotive electronics.
For engineers reviewing the P4SMA12CA-M3/61 datasheet, P4SMA12CA-M3/61 pinout, P4SMA12CA-M3/61 application, or P4SMA12CA-M3/61 equivalent, this device delivers verified bidirectional transient suppression with halogen-free RoHS compliance, AEC-Q101 qualification readiness (via HM3 suffix), MSL Level 1 moisture sensitivity, and low incremental surge resistance for robust ESD and lightning surge immunity in space-constrained layouts.
Technical Context
The P4SMA12CA-M3/61 operates as a symmetrical avalanche diode, conducting equally in both directions above its breakdown threshold. Its glass-passivated junction ensures stable VBR tolerance (±5%) and fast response time (<1 ns), enabling protection of bidirectional data lines such as RS-485, CAN, and I²C without polarity concerns.
Thermally, it exhibits RθJA = 120 °C/W and RθJL = 30 °C/W, supporting reliable operation up to TJ = 150 °C. With 1.0 µA max reverse leakage at VWM, it minimizes standby power loss while maintaining tight clamping performance under repetitive 0.01% duty-cycle surges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage VBR | 11.4–12.6 V at 1 mA - defines precise conduction onset for bidirectional overvoltage clamping |
| Standoff Voltage VWM | 10.2 V - maximum continuous working voltage before leakage exceeds 1.0 µA |
| Clamping Voltage VC | 16.7 V at 24.0 A (10/1000 µs) - limits downstream voltage stress during surge events |
| Peak Pulse Power PPPM | 400 W - sustains single transient energy without degradation when mounted on 5.0 mm × 5.0 mm copper pads |
| Package | SMA (DO-214AC) - low-profile SMD footprint (5.28 mm × 4.50 mm) compatible with automated placement |
| Compliance | Halogen-free, RoHS-compliant, MSL Level 1, JESD201 Class 2 whisker resistant - suitable for high-reliability commercial and automotive-adjacent designs |
Pinout & Package
SMA (DO-214AC) package: surface-mount, molded plastic case with matte tin-plated leads; no polarity marking for bidirectional devices; terminals are anode and cathode symmetrically arranged across the central axis.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (either direction) | Accepts surge current during positive or negative excursions relative to cathode; symmetrical conduction path |
| Cathode | Transient current exit (either direction) | Completes bidirectional clamping loop; identical electrical behavior to anode under reverse bias |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or differential signal lines (e.g., RS-485, USB D+/D−) without polarity routing constraints |
| 400 W peak pulse power | Withstands IEC 61000-4-5 Level 4 surge (4 kV, 2 Ω source) on 24 V systems when properly laid out |
| Low clamping ratio (VC/VBR ≈ 1.39) | Minimizes voltage overshoot during transients, reducing risk of latch-up or gate oxide damage in protected FETs and ICs |
| MSL Level 1 rating | Allows unlimited floor life and standard reflow profiles up to 260 °C peak, eliminating bake requirements prior to assembly |
Applications
| Industrial Sensor Interfaces | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Protecting analog output lines of pressure/temperature sensors exposed to relay coil flyback and load dump in factory automation cabinets. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed directly at connector entry point to shunt induced spikes before reaching ADC input or op-amp buffer. Use Value: Prevents sensor calibration drift and microcontroller reset events caused by 100 V/µs transients exceeding 300 V peak. |
Use Scenario: Safeguarding LIN bus transceivers and window motor driver ICs against battery reverse connection and jump-start surges in door modules. IC Role / Device Role / Timing Role: Primary line-side transient suppressor on 12 V supply rail and LIN signal line, operating within AEC-Q101-compliant design envelope. Use Value: Maintains functional safety integrity during ISO 7637-2 Pulse 1/2/5a events without derating or parallel staging. |
| Telecom Power Feeds | Consumer USB-C Port Protection |
|
Use Scenario: Shielding PoE-powered Ethernet switch ports from induced lightning surges on outdoor cabling runs. IC Role / Device Role / Timing Role: Secondary-level TVS on DC input side of isolated DC/DC converter, coordinated with primary GDT and series impedance. Use Value: Limits let-through voltage to <20 V during 10/1000 µs 1 kV surges, preserving isolation barrier reliability. |
Use Scenario: Guarding USB-C CC and VBUS lines against ESD (IEC 61000-4-2 ±15 kV contact) and hot-swap voltage overshoot. IC Role / Device Role / Timing Role: Fast-response bidirectional clamp placed adjacent to connector, minimizing trace inductance before protected PMIC or controller. Use Value: Achieves sub-100 ps response with <1 µA leakage at 5 V, ensuring no impact on USB 3.2 Gen 2 signal integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ12CA | Higher 600 W PPPM rating; larger SMB (DO-214AA) package (5.3 mm × 4.1 mm); 16.7 V VC at 32.3 A | Better suited for higher-energy surges but requires 30% more PCB area; less optimal for ultra-dense layouts | Select when system-level surge testing exceeds IEC 61000-4-5 Level 4 and board space permits larger footprint |
| 1.5KE12CA | Through-hole TO-218 package; 1500 W PPPM; same VBR/VC specs; higher thermal mass | Used in legacy industrial power supplies where manual assembly or high-reliability mechanical retention is required | Choose only for through-hole manufacturing environments or where vibration resistance outweighs SMT density benefits |
Compared with SMBJ12CA and 1.5KE12CA, the P4SMA12CA-M3/61 offers optimal balance of compact SMA footprint, 400 W surge handling, and halogen-free compliance - making it preferred for modern high-density automotive and IoT edge node designs where PCB real estate and environmental compliance are critical.
Availability
P4SMA12CA-M3/61 is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive body control modules, telecom power feeds, and consumer USB-C port protection requiring stable component supply and halogen-free compliance.
Supply support for P4SMA12CA-M3/61 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 passive components with emphasis on reliability, efficiency, and application-specific optimization.
The P4SMA Series targets cost-sensitive, high-volume transient protection needs in automotive, industrial, and communications equipment - delivering standardized TVS performance in compact, automated-assembly-ready packages.
FAQ
What is the maximum clamping voltage of the P4SMA12CA-M3/61 under standard test conditions?
The P4SMA12CA-M3/61 has a maximum clamping voltage (VC) of 16.7 V when subjected to a 10/1000 µs waveform at 24.0 A peak pulse current. This value is measured per JEDEC standards and reflects worst-case voltage seen by downstream circuitry during transient events - critical for verifying margin against IC absolute maximum ratings. The P4SMA12CA-M3/61 maintains this clamping performance across its full operating temperature range (-65 °C to +150 °C).
Is the P4SMA12CA-M3/61 suitable for automotive applications?
The P4SMA12CA-M3/61 carries the HM3 suffix, indicating halogen-free, RoHS-compliant construction and qualification to AEC-Q101 when ordered with revision code "B" (e.g., P4SMA12CAHM3_B/H). While the base P4SMA12CA-M3/61 meets all electrical and mechanical requirements for automotive use, full AEC-Q101 certification applies only to variants explicitly marked with HE3 or HM3 plus revision suffix. Always verify the full ordering code's qualification status via Vishay's official documentation before deployment in safety-critical automotive systems.
How does the bidirectional nature of the P4SMA12CA-M3/61 affect PCB layout?
The P4SMA12CA-M3/61 has no polarity marking and conducts identically in both directions, eliminating orientation constraints during placement. This simplifies layout for differential or AC-coupled signals - such as RS-485, CAN, or audio lines - where traditional unidirectional TVS diodes would require careful anode/cathode alignment. However, symmetric trace routing and equal copper pad sizing remain essential to preserve balanced clamping impedance. The P4SMA12CA-M3/61 must still be placed as close as possible to the protected interface connector.
What is the thermal resistance of the P4SMA12CA-M3/61, and how does it impact power dissipation?
The P4SMA12CA-M3/61 has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W and junction-to-lead resistance (RθJL) of 30 °C/W when mounted on minimum recommended 5.0 mm × 5.0 mm copper pads. This means that at its rated 3.3 W steady-state power dissipation, junction temperature rise above ambient will be ~396 °C - which exceeds safe limits. Therefore, the P4SMA12CA-M3/61 is intended for transient, not continuous, power dissipation; its 3.3 W rating applies only with infinite heatsinking and derates significantly at elevated ambient temperatures.
Can the P4SMA12CA-M3/61 replace a unidirectional TVS like P4SMA12A-M3/61 in an existing design?
No - the P4SMA12CA-M3/61 is electrically and physically distinct from the unidirectional P4SMA12A-M3/61. While both share identical VBR, VWM, and VC values, the "CA" suffix denotes bidirectional symmetry, meaning it lacks cathode band marking and conducts in both directions. Substituting it into a unidirectional circuit (e.g., DC power rail protection) may cause unintended conduction during normal operation. The P4SMA12CA-M3/61 must only be used where bidirectional clamping is explicitly required and validated in the system-level surge profile.
P4SMA12CA-M3/61 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:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 10.2V
- Voltage - Breakdown (Min):
- 11.4V
- Voltage - Clamping (Max) @ Ipp:
- 16.7V
- Current - Peak Pulse (10/1000µs):
- 24A
- 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)
P4SMA12CA-M3/61 FAQ
1.How can I place an order for P4SMA12CA-M3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA12CA-M3/61 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 P4SMA12CA-M3/61 reliable?
The price and inventory of P4SMA12CA-M3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA12CA-M3/61 is usually 5 days.
3.What payment methods are accepted for P4SMA12CA-M3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA12CA-M3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA12CA-M3/61?
P4SMA12CA-M3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA12CA-M3/61 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 P4SMA12CA-M3/61?
For technical support, including P4SMA12CA-M3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA12CA-M3/61 requirements.
6.How does Aetrix verify that P4SMA12CA-M3/61 is sourced from the original manufacturer or authorized distributors?
All P4SMA12CA-M3/61 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 P4SMA12CA-M3/61 meets industry standards.
7.What is the process for return or replacement of P4SMA12CA-M3/61?
All P4SMA12CA-M3/61 units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA12CA-M3/61, 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 P4SMA12CA-M3/61 part is unused and in its original packaging.
Return procedure for P4SMA12CA-M3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA12CA-M3/61 Tags
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