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Vishay General Semiconductor - Diodes Division SMC3K75CA-M3/9A
- Part No.:
- SMC3K75CA-M3/9A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMC3K75CA-M3/9A.pdf
- Description:
- TVS DIODE 75VWM 121VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,101
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Product details
Overview
SMC3K75CA-M3/9A from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, rated for 3000 W peak pulse power (10/1000 μs), 83.3–92.1 V breakdown voltage, and 75 V standoff voltage. It clamps transients to ≤121 V at 24.8 A surge current and is AEC-Q101 qualified for automotive electronics protection.
For engineers reviewing the SMC3K75CA-M3/9A datasheet, SMC3K75CA-M3/9A pinout, SMC3K75CA-M3/9A application, or SMC3K75CA-M3/9A equivalent, key selection criteria include bidirectional clamping capability, 3000 W surge rating, 150 °C max junction temperature, RoHS-compliant halogen-free construction, and compatibility with automated SMT assembly per J-STD-002.
Technical Context
The SMC3K75CA-M3/9A operates as a silicon avalanche diode designed for unidirectional or bidirectional transient suppression in DC power rails and signal lines. Its clamping behavior follows IEEE C62.35 standards, with low incremental surge resistance enabling stable voltage limiting during fast-rising ESD or inductive-switching events.
It features a 10/1000 μs waveform response, meets MSL Level 1 per J-STD-020, and supports reflow soldering up to 260 °C peak. The device is not recommended for bottom-side wave soldering and requires derating above 25 °C ambient per published thermal curves.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 83.3 V / 92.1 V - ensures reliable avalanche conduction onset across manufacturing lot and temperature range |
| VWM | 75 V - maximum continuous reverse operating voltage before leakage exceeds 2 μA |
| IPPM | 24.8 A - peak surge current it sustains at 10/1000 μs waveform without failure |
| VC @ IPPM | 121 V - clamped voltage seen by protected circuit during full-rated surge event |
| PPPM | 3000 W - peak pulse power handling capacity under standardized transient conditions |
| TJ max | 150 °C - maximum allowable junction temperature for long-term reliability |
| Polarity | Bidirectional - protects both positive and negative polarity transients without external polarity management |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, matte tin-plated leads, UL 94 V-0 molding compound, halogen-free and RoHS-compliant. Dimensions: 7.11 mm × 6.22 mm × 2.62 mm (L × W × H).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (marked side) | Reference terminal for bidirectional operation | No polarity marking on bidirectional types; terminals are symmetrical and interchangeable in layout |
| Anode | Reference terminal for bidirectional operation | Identical physical terminal; device functions identically regardless of orientation in PCB layout |
Key Features
| Feature | Design Value |
|---|---|
| 3000 W peak pulse power | Enables robust protection against high-energy transients such as ISO 7637-2 Pulse 5a/b in automotive power nets |
| AEC-Q101 qualification | Validates reliability for under-hood automotive applications including engine control units and body electronics |
| MSL Level 1 rating | Supports standard reflow profiles without moisture-related popcorn failure risk |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (<1 ns rise time), improving IC-level immunity |
| UL 497B recognition (E136766) | Confirms safety compliance for telecom and industrial interface port protection |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V/24 V battery-connected ECUs from load dump and alternator switching transients. IC Role / Device Role / Timing Role: Primary clamping element placed at power entry point before DC-DC converters and microcontrollers. Use Value: Limits transient voltage to ≤121 V at 24.8 A, preventing latch-up or gate oxide damage in downstream semiconductors. | Use Scenario: Safeguarding analog sensor outputs (e.g., pressure, temperature) connected to PLC I/O modules. IC Role / Device Role / Timing Role: Bidirectional shunt protector on differential or single-ended signal lines exposed to EMI and cable discharge. Use Value: Maintains signal integrity by clamping ±121 V surges while adding <100 pF capacitance at 0 V bias. |
| Telecom Line Interface Protection | Consumer Power Adapter Input Protection |
Use Scenario: Shielding Ethernet PHY interfaces and PoE injectors from lightning-induced surges on twisted-pair cables. IC Role / Device Role / Timing Role: Secondary-level TVS placed after gas discharge tube (GDT) or primary MOV in hybrid protection schemes. Use Value: Provides precise low-clamping-voltage stage with sub-nanosecond response, reducing let-through energy to sensitive PHY ICs. | Use Scenario: Guarding AC-DC adapter input rectifier stages against mains-borne transients per IEC 61000-4-5. IC Role / Device Role / Timing Role: Fast-acting parallel clamp across bulk capacitor input, triggered before overvoltage damages bridge rectifier or controller. Use Value: Absorbs 3000 W surge energy without degradation, supporting repeated surge events in consumer-grade adapters. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMC3K75CAHM3_A | AEC-Q101 qualified; identical electrical specs but marked HM3_A suffix indicating automotive grade screening | Required for new automotive designs where AEC-Q101 compliance must be documented per part number | Select SMC3K75CAHM3_A when automotive qualification traceability is mandatory; SMC3K75CA-M3/9A is commercial-grade with same clamping performance |
| SMBJ75CA | Lower 600 W peak pulse power; SMB (DO-214AA) package; 75 V VWM, 120 V VC @ 5 A | Suitable only for lower-energy transients (e.g., IEC 61000-4-2 ESD, not load dump) | Choose SMBJ75CA only if system-level testing confirms 600 W rating suffices and board space constraints favor smaller SMB footprint |
Compared with SMC3K75CAHM3_A and SMBJ75CA, the SMC3K75CA-M3/9A delivers full 3000 W surge capability in commercial-grade SMC packaging, offering cost-effective protection where AEC-Q101 documentation is not required but high-energy clamping is essential.
Availability
SMC3K75CA-M3/9A is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, and telecom line surge suppression requiring stable component supply and consistent SMC (DO-214AB) form factor.
Supply support for SMC3K75CA-M3/9A 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, power efficiency, and application-specific validation.
The SMC3KxxCA series was developed for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom systems where 3000 W surge immunity and AEC-Q101 or commercial-grade consistency are critical.
FAQ
What is the maximum clamping voltage of the SMC3K75CA-M3/9A at its rated peak pulse current?
The SMC3K75CA-M3/9A clamps to a maximum of 121 V when subjected to its rated peak pulse current of 24.8 A under a 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and represents the upper limit of voltage imposed on protected circuitry during worst-case surge events. The SMC3K75CA-M3/9A maintains this clamping performance across its specified operating temperature range.
Is the SMC3K75CA-M3/9A suitable for automotive applications?
The SMC3K75CA-M3/9A is not AEC-Q101 qualified - it carries the M3 suffix denoting commercial-grade construction. For automotive use, Vishay specifies the SMC3K75CAHM3_A variant. While the SMC3K75CA-M3/9A shares identical electrical characteristics and SMC package, its qualification level limits deployment to non-safety-critical or non-automotive-tier applications unless validated per customer-specific reliability requirements.
What does the "/9A" suffix indicate in SMC3K75CA-M3/9A?
The "/9A" suffix denotes the preferred packaging configuration: 3500 units per 13-inch diameter plastic tape and reel. This differs from "/57", which indicates 850 units per 7-inch reel. Both share identical electrical and mechanical specifications; the suffix solely identifies reel size and quantity, facilitating automated pick-and-place integration and inventory planning for the SMC3K75CA-M3/9A.
Does the SMC3K75CA-M3/9A have polarity markings on the package?
No, the SMC3K75CA-M3/9A does not feature polarity markings because it is a bidirectional TVS diode. Its SMC (DO-214AB) package has symmetrical terminals with no functional distinction between anode and cathode. Layout orientation is arbitrary, and the device provides identical clamping for positive and negative transients regardless of PCB placement direction.
What is the junction-to-ambient thermal resistance (RθJA) for the SMC3K75CA-M3/9A?
Vishay does not publish a fixed RθJA value for the SMC3K75CA-M3/9A, as thermal performance depends entirely on PCB copper pad area and layout. Per datasheet Figure 4, a 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pad reduces thermal impedance significantly. Derating curves in the SMC3K75CA-M3/9A datasheet show power capability falling to ~1500 W at 100 °C ambient, confirming strong dependence on board-level thermal design.
SMC3K75CA-M3/9A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 75V
- Voltage - Breakdown (Min):
- 83.3V
- Voltage - Clamping (Max) @ Ipp:
- 121V
- Current - Peak Pulse (10/1000µs):
- 24.8A
- Power - Peak Pulse:
- 3000W (3kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
SMC3K75CA-M3/9A FAQ
1.How can I place an order for SMC3K75CA-M3/9A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMC3K75CA-M3/9A 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 SMC3K75CA-M3/9A reliable?
The price and inventory of SMC3K75CA-M3/9A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMC3K75CA-M3/9A is usually 5 days.
3.What payment methods are accepted for SMC3K75CA-M3/9A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMC3K75CA-M3/9A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMC3K75CA-M3/9A?
SMC3K75CA-M3/9A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMC3K75CA-M3/9A 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 SMC3K75CA-M3/9A?
For technical support, including SMC3K75CA-M3/9A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMC3K75CA-M3/9A requirements.
6.How does Aetrix verify that SMC3K75CA-M3/9A is sourced from the original manufacturer or authorized distributors?
All SMC3K75CA-M3/9A 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 SMC3K75CA-M3/9A meets industry standards.
7.What is the process for return or replacement of SMC3K75CA-M3/9A?
All SMC3K75CA-M3/9A units undergo pre-shipment inspection (PSI). If there is an issue with SMC3K75CA-M3/9A, 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 SMC3K75CA-M3/9A part is unused and in its original packaging.
Return procedure for SMC3K75CA-M3/9A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMC3K75CA-M3/9A Tags
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