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Vishay General Semiconductor - Diodes Division SMC3K22CAHM3_A/I
- Part No.:
- SMC3K22CAHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMC3K22CAHM3_A/I.pdf
- Description:
- 3KW, 22V 5%,BIDIR,SMC TVS
- Quantity:
- Payment:
- Shipping:
Inventory:2,597
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Product details
Overview
SMC3K22CAHM3_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), 22 V standoff voltage (VWM), and 35.5 V clamping voltage (VC) at 84.5 A IPPM. It protects MOSFETs, ICs, and sensor signal lines in automotive power systems against ISO 7637-2 and ISO 16750-2 transients.
For engineers reviewing the SMC3K22CAHM3_A datasheet, SMC3K22CAHM3_A pinout, SMC3K22CAHM3_A application, or SMC3K22CAHM3_A equivalent, this device is selected for robust ESD immunity (30 kV HBM), AEC-Q101 qualification, and precise clamping performance in 12 V battery-based automotive electronics where low incremental surge resistance and fast response time are critical.
Technical Context
This TVS diode operates bidirectionally to suppress both positive and negative voltage transients without polarity marking. Its breakdown voltage range is 24.4–26.9 V at 1 mA test current, ensuring reliable triggering above system operating voltage while maintaining low leakage (<1.0 μA at VWM).
The device delivers 3000 W peak pulse power under 10/1000 μs waveform and sustains 622 A peak pulse current under 8/20 μs waveform - validated per IEC 61000-4-5 - with thermal resistance RthJM of 4.0 °C/W enabling stable operation up to 175 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 22 V - maximum continuous reverse operating voltage before clamping begins; sets safe margin above 12 V automotive nominal rail. |
| VBR min/max | 24.4 V / 26.9 V - guaranteed breakdown threshold at 1 mA; ensures consistent turn-on across temperature and unit variation. |
| VC @ IPPM | 35.5 V at 84.5 A (10/1000 μs) - clamping voltage limits protected circuit stress during worst-case surge events. |
| PPPM | 3000 W - peak pulse power handling capacity defines survivability against standardized load dump and switching transients. |
| ESD Rating | 30 kV (HBM, contact & air) - exceeds IEC 61000-4-2 Level 4, enabling direct interface protection without additional ESD stages. |
| TJ max | +175 °C - extended junction temperature rating supports under-hood automotive placement with minimal derating. |
| Package | SMC (DO-214AB) - industry-standard surface-mount outline with 7.11 mm × 6.22 mm footprint and 2.62 mm height for automated assembly and thermal reliability. |
Pinout & Package
SMC3K22CAHM3_A uses the standard SMC (DO-214AB) package: a two-terminal, bidirectional surface-mount device with no polarity marking. Terminals are matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (unmarked) | Transient current return path | Acts as common node for bidirectional clamping; connects to ground or reference plane in PCB layout. |
| Anode (unmarked) | Transient current input path | Connects to protected line (e.g., CAN bus, sensor supply); no polarity identification required due to symmetrical construction. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without external polarity management. |
| AEC-Q101 qualification | Validates reliability for automotive powertrain, body control, and ADAS modules under temperature cycling, humidity, and mechanical stress. |
| MSL Level 1 (260 °C peak) | Supports lead-free reflow without moisture sensitivity concerns, eliminating bake requirements prior to assembly. |
| UL 497B recognition (E136766) | Confirms safety compliance for telecom and industrial equipment requiring certified transient protection on primary-side interfaces. |
| Halogen-free & RoHS-compliant | Meets environmental regulations for global OEM supply chains and enables use in green manufacturing programs. |
Applications
| Automotive Power Distribution | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 12 V supply rails in BCM modules against load dump pulses per ISO 16750-2 Pulse B. IC Role / Device Role / Timing Role: Primary transient clamp placed between battery input and DC-DC converter input stage. Use Value: Limits voltage excursion to ≤35.5 V during 101 V/400 ms load dump, preventing overvoltage shutdown or damage to downstream regulators. |
Use Scenario: Shielding analog output lines of pressure/temperature sensors from ESD and inductive switching noise in factory automation PLCs. IC Role / Device Role / Timing Role: Low-capacitance shunt protector mounted directly at connector entry point. Use Value: Clamps 30 kV HBM discharges within nanoseconds while adding <10 pF capacitance, preserving signal integrity up to 1 MHz bandwidth. |
| Automotive CAN Bus Protection | Telecom Line Card Surge Suppression |
|
Use Scenario: Safeguarding CAN-H/CAN-L differential pair against ISO 7637-2 Pulse 2a (112 V, 50 μs) in gateway ECUs. IC Role / Device Role / Timing Role: Bidirectional TVS pair (one per line) placed upstream of CAN transceiver inputs. Use Value: Maintains differential mode immunity with matched clamping (±35.5 V), avoiding common-mode skew that could trigger false dominant states. |
Use Scenario: Front-end protection of Ethernet PHY power and data lines in outdoor telecom base station line cards exposed to lightning-induced surges. IC Role / Device Role / Timing Role: High-power shunt clamp on 48 V bias rail and MDI pairs meeting IEC 61000-4-5 (8/20 μs). Use Value: Absorbs 622 A peak current (8/20 μs) without degradation, ensuring >100,000 surge cycles per Telcordia GR-1089-CORE requirement. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ22CA | Lower PPPM (400 W), smaller SMA package, higher VC (35.5 V same but at lower IPPM = 11.8 A). | Not suitable for ISO 16750-2 Pulse B or high-current load dump; limited to low-energy signal-line protection. | Select only for space-constrained non-automotive designs where 3000 W capability is unnecessary. |
| SMCJ22CA | Same SMC package and 3000 W rating, but VWM = 18.8 V and VC = 30.6 V at 97.4 A - tighter clamping window but lower standoff margin. | Better for 12 V systems with tight voltage margins; less headroom before clamping vs. SMC3K22CAHM3_A's 22 V VWM. | Prefer when lower clamping voltage is prioritized over higher VWM margin; verify compatibility with system overvoltage tolerance. |
Compared with SMAJ22CA and SMCJ22CA, SMC3K22CAHM3_A uniquely balances 22 V standoff, 35.5 V clamping, and full AEC-Q101 qualification - making it the optimal choice for automotive-grade 12 V power rail protection where both voltage margin and surge energy handling are simultaneously critical.
Availability
SMC3K22CAHM3_A is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, telecom line card surge protection, and CAN bus subsystems requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMC3K22CAHM3_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, rectifiers, and protection devices for demanding industrial and automotive environments.
The SMC3K series is engineered specifically for high-energy transient suppression in 12 V and 24 V automotive systems, targeting compliance with ISO 7637-2, ISO 16750-2, and IEC 61000-4-5 standards while delivering AEC-Q101 reliability.
FAQ
What is the clamping voltage of SMC3K22CAHM3_A at its rated peak pulse current?
The SMC3K22CAHM3_A has a maximum clamping voltage (VC) of 35.5 V at 84.5 A peak pulse current under the 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees that protected circuits will not experience voltages exceeding 35.5 V during standardized surge events - a key parameter for validating system-level overvoltage resilience in automotive designs using SMC3K22CAHM3_A.
Is SMC3K22CAHM3_A qualified for automotive applications?
Yes, SMC3K22CAHM3_A is AEC-Q101 qualified and explicitly rated for automotive use, including under-hood environments. It meets ISO 7637-2 (Pulse 1, 2a, 3a, 3b) and ISO 16750-2 (Pulse b) requirements, and its MSL Level 1 rating supports lead-free reflow. These qualifications are documented in Vishay's official datasheet (Doc. #98241, Rev. 09-Jan-2024), confirming SMC3K22CAHM3_A's suitability for engine control, body electronics, and ADAS modules.
What is the standoff voltage (VWM) and why does it matter for SMC3K22CAHM3_A?
The standoff voltage (VWM) of SMC3K22CAHM3_A is 22 V - the maximum continuous reverse voltage the device can withstand without entering conduction. This value provides a 10 % margin above a nominal 12 V automotive system and ensures the SMC3K22CAHM3_A remains non-conductive during normal operation, minimizing leakage (<1.0 μA) and avoiding interference with system functionality while remaining ready to clamp transients above 24.4 V.
How does SMC3K22CAHM3_A compare to standard SMAJ-series TVS diodes?
SMC3K22CAHM3_A delivers 3000 W peak pulse power (vs. 400 W for SMAJ22CA), uses the larger SMC package for superior thermal dissipation, and is AEC-Q101 qualified - unlike most SMAJ variants. Its 22 V VWM offers higher system margin than SMAJ22CA's 18.8 V, and its 30 kV HBM ESD rating exceeds typical SMAJ performance. These distinctions make SMC3K22CAHM3_A appropriate for high-reliability automotive and industrial applications where SMAJ22CA would be underspecified.
What packaging options are available for SMC3K22CAHM3_A?
SMC3K22CAHM3_A is supplied in 13-inch plastic tape and reel format with a base quantity of 3500 units (package code "I"). The device features matte tin-plated leads compliant with J-STD-002 and JESD 22-B102, and passes JESD 201 Class 2 whisker testing. This packaging supports high-volume SMT assembly and ensures long-term solderability and interconnect reliability for SMC3K22CAHM3_A in production environments.
SMC3K22CAHM3_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):
- 22V
- Voltage - Breakdown (Min):
- 24.4V
- Voltage - Clamping (Max) @ Ipp:
- 35.5V
- Current - Peak Pulse (10/1000µs):
- 84.5A
- 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)
SMC3K22CAHM3_A/I FAQ
1.How can I place an order for SMC3K22CAHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMC3K22CAHM3_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 SMC3K22CAHM3_A/I reliable?
The price and inventory of SMC3K22CAHM3_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 SMC3K22CAHM3_A/I is usually 5 days.
3.What payment methods are accepted for SMC3K22CAHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMC3K22CAHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMC3K22CAHM3_A/I?
SMC3K22CAHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMC3K22CAHM3_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 SMC3K22CAHM3_A/I?
For technical support, including SMC3K22CAHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMC3K22CAHM3_A/I requirements.
6.How does Aetrix verify that SMC3K22CAHM3_A/I is sourced from the original manufacturer or authorized distributors?
All SMC3K22CAHM3_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 SMC3K22CAHM3_A/I meets industry standards.
7.What is the process for return or replacement of SMC3K22CAHM3_A/I?
All SMC3K22CAHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMC3K22CAHM3_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 SMC3K22CAHM3_A/I part is unused and in its original packaging.
Return procedure for SMC3K22CAHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMC3K22CAHM3_A/I Tags
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ESD9B5.0ST5G
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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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onsemi
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DESD5V0U1BB-7
Diodes Incorporated
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D12V0L1B2LP-7B
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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