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Vishay General Semiconductor - Diodes Division SMC3K30CA-M3/9A
- Part No.:
- SMC3K30CA-M3/9A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMC3K30CA-M3/9A.pdf
- Description:
- TVS DIODE 30VWM 48.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,674
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Product details
Overview
SMC3K30CA-M3/9A from Vishay General Semiconductor is a bidirectional surface-mount TRANSZORB® transient voltage suppressor (TVS) in SMC (DO-214AB) package, rated for 3000 W peak pulse power (10/1000 μs), 30 V stand-off voltage (VWM), 33.3–36.8 V breakdown voltage (VBR), and 62.0 A peak pulse current (IPPM). It protects MOSFETs, ICs, and sensor signal lines against inductive switching transients and lightning surges in automotive and industrial systems.
For engineers reviewing the SMC3K30CA-M3/9A datasheet, SMC3K30CA-M3/9A pinout, SMC3K30CA-M3/9A application, or SMC3K30CA-M3/9A equivalent, key selection criteria include clamping voltage (48.4 V at IPPM), AEC-Q101 qualification, MSL Level 1 moisture sensitivity, and halogen-free RoHS-compliant construction - critical for high-reliability automotive PCB designs requiring robust ESD and surge immunity.
Technical Context
This TVS diode operates as a voltage-clamping protection device triggered by overvoltage events exceeding its breakdown threshold. Its bidirectional polarity enables symmetrical clamping on AC-coupled or differential signal lines without polarity concerns.
Designed for fast response (<1 ns) and low incremental surge resistance, it delivers stable clamping performance across -55 °C to +150 °C junction temperature range while maintaining 2.0 μA max reverse leakage at 30 V stand-off. The SMC package supports automated placement and meets J-STD-002 solderability standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 30 V - Maximum continuous reverse operating voltage before conduction begins; defines safe working margin below breakdown. |
| VBR (min/max) | 33.3 V / 36.8 V - Breakdown occurs within this range at 1 mA test current; ensures predictable turn-on behavior under surge conditions. |
| VC @ IPPM | 48.4 V - Clamped voltage during 62.0 A 10/1000 μs surge; determines maximum stress imposed on protected downstream circuitry. |
| PPPM | 3000 W - Peak pulse power handling capability with standard 10/1000 μs waveform; quantifies transient energy absorption capacity. |
| TJ max. | +150 °C - Maximum allowable junction temperature; enables operation in under-hood automotive environments. |
| Polarity | Bidirectional - Provides symmetrical overvoltage protection on AC or floating nodes without polarity orientation constraints. |
| Package | SMC (DO-214AB) - Industry-standard surface-mount outline with 8.0 mm × 8.0 mm copper pad area recommendation for thermal management. |
Pinout & Package
SMC3K30CA-M3/9A uses a 2-terminal SMC (DO-214AB) package with no polarity marking for bidirectional operation. Terminals are matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability requirements.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (unmarked) | Transient current return path | Both terminals function identically in bidirectional mode; no cathode/anode distinction required in layout. |
| Anode (unmarked) | Transient current entry point | Terminal symmetry allows flexible PCB routing; no silkscreen polarity marking needed. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity testing, and mechanical shock per AEC specification. |
| MSL Level 1 | Unlimited floor life at ≤30 °C / 85 % RH; eliminates bake requirements prior to reflow assembly. |
| UL 497B recognition | E136766 file number confirms safety compliance for telecom and industrial surge protection applications. |
| Halogen-free & RoHS | M3 suffix denotes halogen-free molding compound and lead-free terminations meeting EU RoHS Directive 2011/65/EU. |
| Low clamping ratio | VC/VWM = 1.61 - High clamping efficiency minimizes voltage overshoot during surge events. |
Applications
| Automotive Powertrain Sensors | Industrial Motor Drive Inputs |
|---|---|
Use Scenario: Protecting crankshaft/camshaft position sensor signal lines from load dump and alternator ripple-induced transients in engine control units. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed directly at connector interface to limit induced surges before reaching analog front-end amplifier. Use Value: Maintains signal integrity under ISO 7637-2 Pulse 5a (load dump) with 48.4 V clamping, preventing ADC saturation and false triggering. |
Use Scenario: Safeguarding isolated gate driver inputs in variable-frequency drives exposed to IGBT switching noise and ground bounce. IC Role / Device Role / Timing Role: Transient suppressor on logic-level enable/disable lines between controller and half-bridge driver ICs. Use Value: Withstands repetitive 3000 W surges without degradation, ensuring uninterrupted PWM command delivery during motor startup/stall events. |
| Telecom Line Interface Cards | Consumer Appliance Control Boards |
Use Scenario: Shielding Ethernet PHY differential pairs and PoE power detection circuits from lightning-induced common-mode surges on outdoor-facing ports. IC Role / Device Role / Timing Role: Bidirectional TVS array element integrated into RJ45 magnetics module footprint for balanced line protection. Use Value: UL 497B recognition validates suitability for telecom infrastructure; 2.0 μA leakage preserves low-power sleep mode current budget. |
Use Scenario: Securing microcontroller GPIOs connected to push-button interfaces and relay feedback lines in washing machine main control boards. IC Role / Device Role / Timing Role: Primary overvoltage barrier against relay coil flyback and ESD discharge from user interaction. Use Value: AEC-Q101 qualification ensures long-term stability in humid, thermally cycled environments where consumer appliances operate. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMC3K30CAHM3/9A | AEC-Q101 qualified version with identical electrical specs; HM3 suffix indicates automotive qualification grade. | Required for new automotive designs needing formal AEC-Q101 certification documentation. | Select SMC3K30CAHM3/9A when automotive OEM compliance reporting (e.g., PPAP) is mandatory. |
| SMC3K33CA-M3/9A | Higher VWM (33 V) and VBR (36.7–40.6 V); same PPPM (3000 W) and package. | Better suited for 3.3 V rail protection where higher stand-off avoids false triggering. | Choose SMC3K33CA-M3/9A when protecting 3.3 V logic interfaces with tighter margin above nominal supply. |
Compared with SMC3K30CA-M3/9A, the HM3 variant adds formal automotive qualification traceability without electrical change, while SMC3K33CA-M3/9A trades 3 V higher stand-off for reduced clamping headroom - enabling selective use based on system voltage tolerance and compliance requirements.
Availability
SMC3K30CA-M3/9A is available at Aetrix Electronics and suitable for automotive powertrain sensors, industrial motor drive inputs, and telecom line interface cards requiring stable component supply and long-term production continuity.
Supply support for SMC3K30CA-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 and application-specific performance.
The SMC3KxxCA series belongs to Vishay's TRANSZORB® TVS family engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom systems demanding AEC-Q101 validation and UL safety recognition.
FAQ
What is the clamping voltage of SMC3K30CA-M3/9A at its rated peak pulse current?
The SMC3K30CA-M3/9A has a maximum clamping voltage (VC) of 48.4 V when subjected to its rated 62.0 A peak pulse current (IPPM) with a 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during surge events. The clamping performance remains stable across the full operating temperature range of -55 °C to +150 °C.
Is SMC3K30CA-M3/9A suitable for new automotive designs?
No - SMC3K30CA-M3/9A is marked "Not for New Designs" in Vishay documentation. For new automotive projects, engineers should select the AEC-Q101-qualified SMC3K30CAHM3/9A variant instead. The SMC3K30CA-M3/9A remains available for legacy production and repair, but lacks the formal qualification documentation required for current automotive OEM approvals.
What does the "M3" suffix mean in SMC3K30CA-M3/9A?
The "M3" suffix in SMC3K30CA-M3/9A indicates halogen-free, RoHS-compliant construction with matte tin-plated leads that meet JESD 201 Class 2 whisker resistance requirements. It also signifies commercial-grade qualification (not AEC-Q101), distinguishing it from the "HM3" suffix used for automotive-qualified versions of the same device family.
Does SMC3K30CA-M3/9A have polarity markings on the package?
No, SMC3K30CA-M3/9A has no polarity markings because it is a bidirectional TVS diode. Both terminals are functionally identical, allowing unrestricted orientation during PCB placement. The SMC (DO-214AB) package uses symmetric lead geometry and unmarked body, eliminating risk of incorrect installation in AC-coupled or differential protection configurations.
What is the moisture sensitivity level (MSL) rating for SMC3K30CA-M3/9A?
SMC3K30CA-M3/9A is rated MSL Level 1 per J-STD-020, meaning it has unlimited floor life at standard conditions (≤30 °C / 85 % RH) and requires no baking prior to reflow soldering. This simplifies manufacturing flow and reduces handling overhead in high-volume SMT assembly environments.
SMC3K30CA-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):
- 30V
- Voltage - Breakdown (Min):
- 33.3V
- Voltage - Clamping (Max) @ Ipp:
- 48.4V
- Current - Peak Pulse (10/1000µs):
- 62A
- 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)
SMC3K30CA-M3/9A FAQ
1.How can I place an order for SMC3K30CA-M3/9A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMC3K30CA-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 SMC3K30CA-M3/9A reliable?
The price and inventory of SMC3K30CA-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 SMC3K30CA-M3/9A is usually 5 days.
3.What payment methods are accepted for SMC3K30CA-M3/9A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMC3K30CA-M3/9A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMC3K30CA-M3/9A?
SMC3K30CA-M3/9A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMC3K30CA-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 SMC3K30CA-M3/9A?
For technical support, including SMC3K30CA-M3/9A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMC3K30CA-M3/9A requirements.
6.How does Aetrix verify that SMC3K30CA-M3/9A is sourced from the original manufacturer or authorized distributors?
All SMC3K30CA-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 SMC3K30CA-M3/9A meets industry standards.
7.What is the process for return or replacement of SMC3K30CA-M3/9A?
All SMC3K30CA-M3/9A units undergo pre-shipment inspection (PSI). If there is an issue with SMC3K30CA-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 SMC3K30CA-M3/9A part is unused and in its original packaging.
Return procedure for SMC3K30CA-M3/9A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMC3K30CA-M3/9A Tags
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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