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Vishay General Semiconductor - Diodes Division SMC3K75CAHM3/57
- Part No.:
- SMC3K75CAHM3/57
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMC3K75CAHM3/57.pdf
- Description:
- TVS DIODE 75VWM 121VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,106
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Product details
Overview
SMC3K75CAHM3/57 from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the SMC (DO-214AB) package, rated for 3000 W peak pulse power (10/1000 μs), with a breakdown voltage range of 83.3–92.1 V, stand-off voltage of 75 V, and clamping voltage of 121 V at 24.8 A peak pulse current. It is AEC-Q101 qualified and used to protect automotive sensor signal lines and power rails against inductive switching transients.
For engineers reviewing the SMC3K75CAHM3/57 datasheet, SMC3K75CAHM3/57 pinout, SMC3K75CAHM3/57 application, or SMC3K75CAHM3/57 equivalent, key selection criteria include verified bidirectional clamping performance, AEC-Q101 qualification status, 121 V clamping voltage at 24.8 A, SMC package thermal and mechanical compliance, and compatibility with automated SMT assembly per J-STD-002 and JESD 22-B102.
Technical Context
This TVS diode operates as a voltage-clamped surge protector with symmetrical bidirectional avalanche conduction. Its low incremental surge resistance and fast response time enable effective suppression of transient energy from load dump, ESD, and inductive kickback events in automotive and industrial systems.
The device features a maximum junction temperature of 150 °C, MSL Level 1 moisture sensitivity, and halogen-free, RoHS-compliant construction with matte tin-plated leads. The HM3 suffix confirms AEC-Q101 qualification and JESD 201 Class 2 whisker resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 3000 W (10/1000 μs waveform) - sustains high-energy transients without failure |
| Stand-off Voltage (VWM) | 75 V - blocks normal operating voltage while remaining non-conductive |
| Breakdown Voltage (VBR) | 83.3–92.1 V at 1 mA - defines onset of controlled avalanche conduction |
| Clamping Voltage (VC) | 121 V at 24.8 A IPPM - limits downstream voltage stress during surge |
| Junction Temperature Range | −55 °C to +150 °C - supports under-hood automotive and industrial ambient conditions |
| Package | SMC (DO-214AB) - standardized surface-mount outline with 8.0 mm × 8.0 mm copper pad requirement |
| Polarity | Bidirectional - protects AC-coupled or differential signal paths without orientation dependency |
Pinout & Package
SMC3K75CAHM3/57 uses the standard SMC (DO-214AB) package: a two-terminal surface-mount device with cathode band marking omitted on bidirectional variants. Terminals are matte tin-plated, solderable per J-STD-002 and JESD 22-B102, and meet JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Both terminals function identically in bidirectional mode; no polarity-sensitive placement required |
| Case (cathode band absent) | Thermal and mechanical interface | Exposed metal slug provides primary thermal path to PCB copper; no electrical isolation |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated reliability for automotive electronics including engine control, ADAS sensors, and body modules |
| 3000 W peak pulse rating | Withstands high-energy transients from ISO 7637-2 Pulse 5a (load dump) without degradation |
| Low clamping ratio (VC/VBR ≈ 1.31) | Minimizes overvoltage stress on protected ICs such as CAN transceivers and microcontrollers |
| MSL Level 1 rating | Enables standard reflow without baking or special handling prior to assembly |
| Halogen-free & RoHS-compliant | Meets automotive OEM environmental requirements and EU regulatory mandates |
Applications
| Automotive Sensor Protection | Industrial Motor Drive I/O |
|---|---|
Use Scenario: Protecting analog output lines of pressure and temperature sensors in engine compartments exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across sensor supply and ground pins to limit transient excursions. Use Value: Prevents latch-up or permanent damage to 5 V or 12 V sensor ASICs by clamping surges to ≤121 V at 24.8 A. |
Use Scenario: Shielding digital I/O and feedback signal lines in variable-frequency drives subject to inductive switching noise. IC Role / Device Role / Timing Role: Transient suppressor mounted at connector entry point to shunt EFT and surge energy before reaching logic-level circuitry. Use Value: Maintains signal integrity for encoder and Hall-effect inputs by limiting reverse recovery-induced overshoot to <121 V. |
| Telecom Line Interface | Consumer Power Adapter Input |
Use Scenario: Safeguarding Ethernet PHY interfaces and PoE injectors against lightning-induced surges on twisted-pair cables. IC Role / Device Role / Timing Role: Primary protection element placed upstream of common-mode chokes and data-line TVS arrays. Use Value: Absorbs up to 3000 W of coupled surge energy while maintaining <100 pF junction capacitance to avoid signal distortion. |
Use Scenario: Secondary-side overvoltage protection in AC-DC adapters for smart home devices subjected to mains transients. IC Role / Device Role / Timing Role: Standoff-rated clamp across DC output rails to prevent overvoltage propagation to USB-PD controllers and battery management ICs. Use Value: Ensures regulated 5 V/9 V/12 V outputs remain within ±5 % tolerance during 10/1000 μs line surges up to 3 kV. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMC3K75CAHM3_A | Same electrical specs; updated revision with enhanced traceability and updated packaging documentation | No functional difference; intended as direct replacement for legacy SMC3K75CAHM3/57 in new designs | Select when sourcing newly released production lots with full AEC-Q101 test report traceability |
| SMAJ75A | Lower peak pulse power (400 W), SMA package (smaller thermal mass), unidirectional only | Limited to lower-energy transients; unsuitable for automotive load dump or industrial motor drive protection | Consider only for cost-sensitive consumer applications with sub-1 kV surge exposure |
Compared with SMC3K75CAHM3/57, SMC3K75CAHM3_A offers identical clamping and surge performance with improved manufacturing documentation, while SMAJ75A trades 7.5× lower pulse power and unidirectional operation for reduced size and cost-making it viable only in non-automotive, low-energy contexts.
Availability
SMC3K75CAHM3/57 is available at Aetrix Electronics and suitable for automotive sensor protection, industrial motor drive I/O safeguarding, and telecom line interface surge suppression requiring stable component supply across extended production lifecycles.
Supply support for SMC3K75CAHM3/57 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 supplier of discrete semiconductors, specializing in diodes, rectifiers, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific validation.
The SMC3KxxCA series was designed specifically for high-power transient suppression in harsh environments, targeting AEC-Q101-compliant automotive subsystems and industrial equipment where robustness against repetitive surge stress is critical.
FAQ
What is the clamping voltage of SMC3K75CAHM3/57 at its rated peak pulse current?
The SMC3K75CAHM3/57 has a maximum clamping voltage (VC) of 121 V at its rated peak pulse current (IPPM) of 24.8 A, measured using the standard 10/1000 μs double-exponential waveform. This value is guaranteed per the Vishay datasheet revision dated 13-Sep-2022 and defines the upper voltage limit imposed on protected circuitry during surge events. The SMC3K75CAHM3/57 maintains this clamping performance across its qualified operating temperature range.
Is SMC3K75CAHM3/57 suitable for new automotive designs?
No - Vishay explicitly marks SMC3K75CAHM3/57 as "Not for New Designs" and recommends SMC3K75CAHM3_A as the alternative. While SMC3K75CAHM3/57 remains AEC-Q101 qualified and fully functional, new designs should use the updated SMC3K75CAHM3_A variant to ensure long-term supply continuity and access to current test reports and packaging specifications. The SMC3K75CAHM3/57 is supported for existing production but not endorsed for design-in.
What does the 'HM3' suffix indicate in SMC3K75CAHM3/57?
The 'HM3' suffix in SMC3K75CAHM3/57 denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification and JESD 201 Class 2 whisker resistance. It distinguishes this grade from the commercial 'M3' variant, which lacks automotive qualification. The HM3 suffix confirms that the SMC3K75CAHM3/57 meets stringent reliability and material requirements for under-hood and safety-critical automotive applications.
Can SMC3K75CAHM3/57 be used in bidirectional signal line protection?
Yes - SMC3K75CAHM3/57 is specified for bidirectional polarity only, making it inherently suitable for protecting AC-coupled, differential, or floating signal lines such as CAN bus, RS-485, or sensor bridge outputs. Its symmetrical breakdown behavior ensures equal clamping in both directions without requiring orientation-specific placement, and the absence of polarity marking on the SMC package reflects this design intent. The SMC3K75CAHM3/57 delivers consistent 121 V clamping regardless of surge polarity.
What is the maximum operating junction temperature for SMC3K75CAHM3/57?
The SMC3K75CAHM3/57 has a maximum operating junction temperature (TJ max.) of +150 °C, as specified in the Vishay datasheet. This rating enables reliable operation in high-ambient environments such as automotive engine bays or industrial motor control enclosures. Derating curves in the datasheet show that peak pulse power must be reduced above TA = 25 °C, and the SMC3K75CAHM3/57 remains within safe thermal limits up to its rated TJ when mounted on a minimum 8.0 mm × 8.0 mm copper pad per the recommended layout.
SMC3K75CAHM3/57 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):
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
SMC3K75CAHM3/57 FAQ
1.How can I place an order for SMC3K75CAHM3/57 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMC3K75CAHM3/57 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 SMC3K75CAHM3/57 reliable?
The price and inventory of SMC3K75CAHM3/57 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMC3K75CAHM3/57 is usually 5 days.
3.What payment methods are accepted for SMC3K75CAHM3/57?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMC3K75CAHM3/57 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMC3K75CAHM3/57?
SMC3K75CAHM3/57 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMC3K75CAHM3/57 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 SMC3K75CAHM3/57?
For technical support, including SMC3K75CAHM3/57 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMC3K75CAHM3/57 requirements.
6.How does Aetrix verify that SMC3K75CAHM3/57 is sourced from the original manufacturer or authorized distributors?
All SMC3K75CAHM3/57 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 SMC3K75CAHM3/57 meets industry standards.
7.What is the process for return or replacement of SMC3K75CAHM3/57?
All SMC3K75CAHM3/57 units undergo pre-shipment inspection (PSI). If there is an issue with SMC3K75CAHM3/57, 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 SMC3K75CAHM3/57 part is unused and in its original packaging.
Return procedure for SMC3K75CAHM3/57:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMC3K75CAHM3/57 Tags
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