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Vishay General Semiconductor - Diodes Division SMC3K30CAHM3_A/I
- Part No.:
- SMC3K30CAHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMC3K30CAHM3_A/I.pdf
- Description:
- 3KW, 30V 5%,BIDIR,SMC TVS
- Quantity:
- Payment:
- Shipping:
Inventory:4,793
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Product details
Overview
SMC3K30CAHM3_A from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed for high-energy surge protection with 3000 W peak pulse power (10/1000 μs), 30 V standoff voltage (VWM), and 48.4 V clamping voltage at 469 A peak pulse current. It protects automotive power lines, sensor signal paths, and MOSFET gate drivers against ISO 7637-2 Pulse 1/2a/3a/3b and ISO 16750-2 Pulse b transients.
For engineers reviewing the SMC3K30CAHM3_A datasheet, SMC3K30CAHM3_A pinout, SMC3K30CAHM3_A application, or SMC3K30CAHM3_A equivalent, this device delivers AEC-Q101 qualification, 30 kV ESD immunity per IEC 61000-4-2, UL 497B recognition, and MSL Level 1 moisture sensitivity - critical for automotive electronics design validation and robust board-level transient suppression.
Technical Context
This bidirectional TVS operates without polarity marking and responds within picoseconds to voltage transients, leveraging low incremental surge resistance (1.0 Ω typical) and fast junction capacitance (≈100 pF at 0 V, decreasing with bias). Its clamping behavior is defined across two standardized waveforms: 10/1000 μs (IEC 61000-4-5) and 8/20 μs (lightning surge), with verified performance up to 175 °C junction temperature.
The device meets stringent automotive reliability requirements including AEC-Q101 stress testing, JESD201 Class 2 whisker resistance, and UL 497B safety certification. Thermal performance is characterized by RthJA = 90 °C/W (JEDEC 51-2A, FR4, 2 oz Cu) and RthJM = 4.0 °C/W (JEDEC 51-14 TDIM), enabling predictable derating in engine control unit (ECU) and body control module (BCM) layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (10/1000 μs) | 3000 W - sustains 469 A transient current at 48.4 V clamp without failure in automotive load dump events |
| Standoff Voltage (VWM) | 30 V - blocks normal 24 V system operation while triggering only above transient threshold |
| Clamping Voltage (VC) | 48.4 V at 469 A - limits downstream IC voltage to safe level during ISO 7637-2 Pulse 1 (−150 V) and Pulse 2a (112 V) |
| Breakdown Voltage (VBR) | 33.3–36.8 V at 1 mA - ensures reliable turn-on margin above VWM for stable protection activation |
| ESD Withstand (IEC 61000-4-2) | 30 kV contact/air - eliminates need for additional ESD stages on exposed connectors or sensors |
| Junction Temperature Range | −55 °C to +175 °C - supports under-hood placement in modern 48 V mild-hybrid and ADAS systems |
| Package | SMC (DO-214AB) - industry-standard footprint compatible with automated SMT assembly and thermal pad layout per JEDEC MO-136 |
Pinout & Package
SMC3K30CAHM3_A uses the standard SMC (DO-214AB) surface-mount package: 7.11 mm × 6.22 mm × 2.62 mm body, matte tin-plated terminals, halogen-free molding compound rated UL 94 V-0. Polarity is unmarked due to bidirectional symmetry.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Anode) | Transient current return path | Both terminals conduct identically during overvoltage - no orientation required during placement |
| Anode (Cathode) | Transient current entry point | Enables symmetric clamping across supply rail and ground, eliminating routing constraints in differential or floating systems |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive powertrain and chassis applications with extended temperature cycling, HTRB, and ESD stress testing |
| 30 kV ESD immunity | Eliminates secondary ESD protection components on CAN/LIN bus interfaces and sensor inputs |
| Low clamping ratio (VC/VBR ≈ 1.35) | Minimizes voltage overshoot during fast transients, protecting 3.3 V/5 V logic and analog front-ends |
| MSL Level 1 (260 °C peak) | Supports lead-free reflow without preconditioning, reducing manufacturing complexity and cost |
| UL 497B recognized (E136766) | Meets safety agency requirements for telecom and industrial power interface designs |
Applications
| Automotive Power Line Protection | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Protecting 24 V supply rails in body control modules (BCM) against ISO 16750-2 Pulse b load dump transients up to 120 V. IC Role / Device Role / Timing Role: Primary clamping element placed directly at connector entry point before DC/DC converter input. Use Value: Limits voltage to ≤48.4 V during 469 A surges, preventing damage to upstream PMICs and microcontrollers. |
Use Scenario: Shielding analog outputs of pressure/temperature sensors in factory automation PLC I/O modules from inductive switching noise. IC Role / Device Role / Timing Role: Low-capacitance shunt protector on 4–20 mA or 0–10 V output lines, placed adjacent to connector. Use Value: Clamps transients to <42 V while maintaining signal integrity via <100 pF junction capacitance at DC bias. |
| Automotive CAN Bus Interface | Consumer Appliance Motor Drive |
Use Scenario: Safeguarding high-speed CAN FD transceivers (e.g., TCAN1042) against ESD and coupled transients on vehicle infotainment networks. IC Role / Device Role / Timing Role: Secondary protection stage after common-mode choke, absorbing residual energy missed by front-end filtering. Use Value: Withstands 30 kV contact ESD and clamps ISO 7637-2 Pulse 3b to ≤42 V, preserving bit error rate (BER) in 5 Mbps CAN FD links. |
Use Scenario: Suppressing commutation spikes from brushed DC motors in smart home appliances (e.g., robotic vacuum cleaners). IC Role / Device Role / Timing Role: Rail-to-rail TVS across motor terminals and H-bridge supply pins to absorb inductive kickback. Use Value: Handles repetitive 3 kW surges without degradation, extending MOSFET lifetime and eliminating snubber RC networks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ30CA | Lower PPPM (400 W), SMA package (smaller thermal mass), higher RthJA (150 °C/W) | Not suitable for sustained load dump; limited to low-energy ESD/signal line use | Select only for space-constrained non-automotive PCBs where 3000 W rating is unnecessary |
| SMCJ30CA | Same SMC package, identical VWM/VC specs, but not AEC-Q101 qualified or UL 497B recognized | Lacks automotive qualification and safety certification - requires additional system-level validation | Acceptable for industrial controls where AEC-Q101 is not mandated, but adds compliance risk in automotive BOMs |
Compared with SMC3K30CAHM3_A, SMAJ30CA trades surge capacity for footprint reduction, while SMCJ30CA omits automotive and safety certifications - making SMC3K30CAHM3_A the only choice when AEC-Q101, UL 497B, and 3000 W capability are jointly required.
Availability
SMC3K30CAHM3_A is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, and consumer appliance motor drives requiring stable component supply across multi-year production cycles.
Supply support for SMC3K30CAHM3_A 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 high-reliability diodes, MOSFETs, and passive components for automotive, industrial, and computing markets.
The SMC3KxxCAHM3_A series was engineered specifically for AEC-Q101-compliant automotive transient suppression, targeting ISO 7637-2 and ISO 16750-2 compliance in 12 V/24 V battery systems.
FAQ
What is the maximum clamping voltage of SMC3K30CAHM3_A at its rated peak pulse current?
The SMC3K30CAHM3_A clamps to 48.4 V at its specified peak pulse current of 469 A under the 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and confirmed in the Vishay datasheet revision 09-Jan-2024, page 2. The clamping voltage remains stable across temperature and aging, supporting reliable protection in automotive environments where voltage margins are tight.
Is SMC3K30CAHM3_A suitable for 48 V automotive systems?
SMC3K30CAHM3_A is rated for 30 V standoff and 48.4 V clamping, making it unsuitable as primary protection in nominal 48 V systems where transients exceed its VWM. However, it can protect auxiliary 12 V/24 V sub-circuits (e.g., lighting controllers, HVAC actuators) within 48 V architectures. For direct 48 V rail protection, higher-VWM variants like SMC3K60CAHM3_A (60 V VWM) are recommended.
Does SMC3K30CAHM3_A require orientation during PCB placement?
No - SMC3K30CAHM3_A is a bidirectional TVS diode with symmetrical terminal construction. Its marking code "3BFK" appears on one side, but both terminals perform identically during transient events. The datasheet explicitly states "no marking on bidirectional types", confirming zero orientation dependency during SMT placement or manual assembly.
What is the thermal resistance from junction to ambient for SMC3K30CAHM3_A?
The thermal resistance from junction to ambient (RthJA) for SMC3K30CAHM3_A is 90 °C/W, measured per JEDEC 51-2A on a standard FR4 PCB with 2 oz copper and the recommended mounting pad layout. This value assumes no thermal vias; adding ≥4 thermal vias under the cathode/anode pads reduces RthJA by ~25 %, improving surge endurance in high-duty-cycle applications.
How does SMC3K30CAHM3_A meet ISO 7637-2 Pulse 1 protection requirements?
SMC3K30CAHM3_A clamps ISO 7637-2 Pulse 1 (−150 V, 2 ms, 10 Ω source) to −40 V, as verified in the Vishay datasheet page 4. This 110 V suppression margin ensures downstream 3.3 V/5 V microcontrollers and CAN transceivers remain within absolute maximum ratings. Its 3000 W rating and low dynamic impedance enable consistent clamping across repeated pulses without parameter drift.
SMC3K30CAHM3_A/I 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:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
SMC3K30CAHM3_A/I FAQ
1.How can I place an order for SMC3K30CAHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMC3K30CAHM3_A/I 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 SMC3K30CAHM3_A/I reliable?
The price and inventory of SMC3K30CAHM3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMC3K30CAHM3_A/I is usually 5 days.
3.What payment methods are accepted for SMC3K30CAHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMC3K30CAHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMC3K30CAHM3_A/I?
SMC3K30CAHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMC3K30CAHM3_A/I 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 SMC3K30CAHM3_A/I?
For technical support, including SMC3K30CAHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMC3K30CAHM3_A/I requirements.
6.How does Aetrix verify that SMC3K30CAHM3_A/I is sourced from the original manufacturer or authorized distributors?
All SMC3K30CAHM3_A/I 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 SMC3K30CAHM3_A/I meets industry standards.
7.What is the process for return or replacement of SMC3K30CAHM3_A/I?
All SMC3K30CAHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMC3K30CAHM3_A/I, 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 SMC3K30CAHM3_A/I part is unused and in its original packaging.
Return procedure for SMC3K30CAHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMC3K30CAHM3_A/I Tags
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DESD3V3E1BL-7B
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Diodes Incorporated
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Diodes Incorporated
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