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Vishay General Semiconductor - Diodes Division SMC3K45CAHM3/57
- Part No.:
- SMC3K45CAHM3/57
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMC3K45CAHM3/57.pdf
- Description:
- TVS DIODE 45VWM 72.7VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,513
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Product details
Overview
SMC3K45CAHM3/57 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), 45 V standoff voltage (VWM), 50.0–55.3 V breakdown voltage (VBR), and 41.3 A peak pulse current (IPPM). It provides clamping at 72.7 V and is AEC-Q101 qualified for automotive electronics protection.
For engineers reviewing the SMC3K45CAHM3/57 datasheet, SMC3K45CAHM3/57 pinout, SMC3K45CAHM3/57 application, or SMC3K45CAHM3/57 equivalent, key selection criteria include bidirectional surge capability, clamping voltage margin relative to protected ICs, AEC-Q101 qualification status, and compatibility with automated SMT assembly using 7″ tape-and-reel delivery.
Technical Context
The SMC3K45CAHM3/57 operates as a voltage-clamping device triggered by transient overvoltage events, with fast response time and low incremental surge resistance enabling effective suppression of inductive switching spikes and ESD-induced transients. Its bidirectional polarity supports AC-coupled signal line protection without polarity concerns.
Designed for surface-mount use in high-reliability environments, it features halogen-free, RoHS-compliant construction, meets MSL Level 1 per J-STD-020, and withstands lead-free reflow up to 260 °C. The device is not recommended for bottom-side wave soldering due to thermal stress limitations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 45 V - maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 50.0 V / 55.3 V - breakdown occurs within this range at 1 mA test current, defining turn-on threshold |
| VC @ IPPM | 72.7 V - clamped voltage during 41.3 A 10/1000 μs surge, limiting stress on downstream components |
| PPPM | 3000 W - peak pulse power handling capacity under standardized 10/1000 μs waveform |
| IPPM | 41.3 A - maximum non-repetitive surge current the device can safely divert |
| TJ max | +150 °C - maximum junction temperature, supporting operation in under-hood automotive environments |
| Polarity | Bidirectional - protects both positive and negative transients on same line, ideal for AC or differential signals |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, matte tin-plated leads, halogen-free and RoHS-compliant, qualified to AEC-Q101. Dimensions: 7.75 mm × 6.22 mm × 2.62 mm (L × W × H).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (marked side) | Transient current sink terminal | Connected to ground or low-impedance return path to shunt surge energy away from protected circuit |
| Anode | Transient current source terminal | Connected to line being protected; bidirectional symmetry means either terminal may serve as input depending on transient polarity |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock testing |
| 3000 W peak pulse power | Enables robust protection against high-energy transients such as load dump or ISO 7637-2 Pulse 5a |
| MSL Level 1 rating | Allows unlimited floor life and compatibility with standard SMT reflow profiles without dry-pack requirements |
| UL 497B recognition | Confirms safety compliance for use in telecom and industrial equipment requiring certified surge protection |
| Halogen-free & RoHS | Meets environmental compliance mandates for global electronics manufacturing and end-of-life recycling |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump and alternator transients per ISO 7637-2. IC Role / Device Role / Timing Role: Voltage-clamping TVS placed between power rail and chassis ground to limit surge voltage to safe levels. Use Value: Clamps to 72.7 V during 41.3 A surges, ensuring downstream regulators and microcontrollers remain within absolute maximum ratings. | Use Scenario: Safeguarding analog sensor outputs (e.g., pressure, temperature) connected to PLC I/O modules. IC Role / Device Role / Timing Role: Bidirectional transient suppressor on differential or single-ended signal lines exposed to field wiring noise. Use Value: Fast response and low clamping voltage preserve signal integrity while surviving repeated 1 kV EFT bursts per IEC 61000-4-4. |
| Telecom Line Interface Protection | Consumer Equipment DC Power Input Protection |
Use Scenario: Shielding Ethernet PHY or RS-485 transceivers from lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Primary-level TVS on data line pairs, coordinated with secondary GDT or polymer PTC devices. Use Value: 3000 W capability handles multi-kA induced currents; bidirectional design accommodates common-mode transients without polarity constraints. | Use Scenario: Hardening USB-C or barrel-jack DC inputs in smart home hubs against user-induced plug-in surges and ESD. IC Role / Device Role / Timing Role: Standoff-rated TVS on main input rail upstream of DC-DC converters and LDOs. Use Value: 45 V VWM matches typical 48 V PoE or 36–42 V adapter outputs; 72.7 V VC prevents latch-up in downstream silicon. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMC3K45CAHM3_A/57 | Same electrical specs and AEC-Q101 qualification; updated suffix denotes revised internal revision control and traceability | No functional difference; identical use cases and layout compatibility | Select when new design requires latest Vishay revision with enhanced lot traceability |
| SMAJ45A | Lower 400 W PPPM rating, 38.2 V VWM, 45.5 V VBR, 58.1 V VC, and no AEC-Q101 qualification | Suitable only for commercial-grade, lower-energy surge environments (e.g., IEC 61000-4-5 Level 2) | Choose for cost-sensitive non-automotive designs where 3000 W capability is unnecessary |
Compared with SMC3K45CAHM3/57, SMC3K45CAHM3_A/57 offers identical performance with improved manufacturing traceability, while SMAJ45A provides reduced surge robustness and lacks automotive qualification-making it unsuitable for under-hood or safety-critical systems.
Availability
SMC3K45CAHM3/57 is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interface, telecom line protection, and consumer DC input protection requiring stable component supply and long-term lifecycle support.
Supply support for SMC3K45CAHM3/57 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, efficiency, and application-specific optimization.
The SMC3KxxCAHM3 series belongs to Vishay's TRANSZORB® TVS family, engineered specifically for high-energy transient suppression in harsh automotive and industrial environments where AEC-Q101 compliance and 3000 W surge capability are mandatory.
FAQ
What is the clamping voltage of SMC3K45CAHM3/57 at its rated peak pulse current?
The SMC3K45CAHM3/57 has a maximum clamping voltage (VC) of 72.7 V when subjected to its rated peak pulse current (IPPM) of 41.3 A under the standard 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and ensures predictable voltage limiting during surge events, protecting downstream ICs rated for ≤80 V absolute maximum.
Is SMC3K45CAHM3/57 suitable for automotive applications?
Yes, SMC3K45CAHM3/57 is AEC-Q101 qualified and explicitly designed for automotive use, including engine control units, body electronics, and ADAS sensor interfaces. Its 150 °C maximum junction temperature, MSL Level 1 rating, and halogen-free construction meet stringent automotive manufacturing and operational requirements.
What does the "HM3" suffix indicate in SMC3K45CAHM3/57?
The "HM3" suffix in SMC3K45CAHM3/57 denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. It distinguishes this grade from the commercial "M3" variant and confirms compliance with automotive reliability standards, whisker resistance (JESD 201 Class 2), and lead-free reflow compatibility up to 260 °C.
Can SMC3K45CAHM3/57 be used in bidirectional signal line protection?
Yes, SMC3K45CAHM3/57 is a bidirectional TVS diode, making it appropriate for protecting AC-coupled or differential signal lines such as RS-485, CAN, or audio paths. Its symmetrical breakdown behavior ensures equal clamping for both polarities without requiring orientation-specific placement on PCBs.
What is the packaging format for SMC3K45CAHM3/57?
SMC3K45CAHM3/57 is supplied in 7″ diameter plastic tape-and-reel packaging with a base quantity of 850 units per reel (package code "57"). This format supports high-speed automated pick-and-place assembly and complies with EIA-481 standards for SMT manufacturing.
SMC3K45CAHM3/57 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):
- 45V
- Voltage - Breakdown (Min):
- 50V
- Voltage - Clamping (Max) @ Ipp:
- 72.7V
- Current - Peak Pulse (10/1000µs):
- 41.3A
- Power - Peak Pulse:
- 3000W (3kW)
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
SMC3K45CAHM3/57 FAQ
1.How can I place an order for SMC3K45CAHM3/57 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMC3K45CAHM3/57 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 SMC3K45CAHM3/57 reliable?
The price and inventory of SMC3K45CAHM3/57 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMC3K45CAHM3/57 is usually 5 days.
3.What payment methods are accepted for SMC3K45CAHM3/57?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMC3K45CAHM3/57 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMC3K45CAHM3/57?
SMC3K45CAHM3/57 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMC3K45CAHM3/57 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 SMC3K45CAHM3/57?
For technical support, including SMC3K45CAHM3/57 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMC3K45CAHM3/57 requirements.
6.How does Aetrix verify that SMC3K45CAHM3/57 is sourced from the original manufacturer or authorized distributors?
All SMC3K45CAHM3/57 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 SMC3K45CAHM3/57 meets industry standards.
7.What is the process for return or replacement of SMC3K45CAHM3/57?
All SMC3K45CAHM3/57 units undergo pre-shipment inspection (PSI). If there is an issue with SMC3K45CAHM3/57, 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 SMC3K45CAHM3/57 part is unused and in its original packaging.
Return procedure for SMC3K45CAHM3/57:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMC3K45CAHM3/57 Tags
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