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Vishay General Semiconductor - Diodes Division SMC3K24CAHM3_A/H
- Part No.:
- SMC3K24CAHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMC3K24CAHM3_A/H.pdf
- Description:
- 3KW, 24V 5%,BIDIR,SMC TVS
- Quantity:
- Payment:
- Shipping:
Inventory:1,335
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Product details
Overview
SMC3K24CAHM3_A from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) in SMC (DO-214AB) package, designed for robust overvoltage protection of 24 V DC systems. It delivers 3000 W peak pulse power (10/1000 μs), clamps at 38.9 V under 77.1 A surge current, and features 26.7–29.5 V breakdown voltage with ≤1.0 μA leakage at 24 V stand-off.
For engineers reviewing the SMC3K24CAHM3_A datasheet, SMC3K24CAHM3_A pinout, SMC3K24CAHM3_A application, or SMC3K24CAHM3_A equivalent, key selection criteria include ISO 7637-2 Pulse 1/2a/3a/3b compliance, AEC-Q101 qualification, 30 kV ESD immunity per IEC 61000-4-2, and suitability for automotive load-dump and inductive-switching transient suppression on 12–24 V power rails and signal lines.
Technical Context
This TVS diode operates as a voltage-clamping device that enters avalanche conduction when reverse voltage exceeds its breakdown range (26.7–29.5 V), limiting transient energy to protected downstream circuitry. Its low incremental surge resistance ensures stable clamping performance across repetitive pulses.
Designed for automotive-grade reliability, it meets AEC-Q101 stress testing, UL 497B safety recognition (E136766), and J-STD-020 MSL Level 1 moisture sensitivity - enabling reflow soldering up to 260 °C peak. Thermal resistance is 90 °C/W (junction-to-ambient) and 4.0 °C/W (junction-to-mount).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage (VBR) | 26.7 V min / 29.5 V max at 1.0 mA - defines precise turn-on threshold for reliable clamping onset |
| Stand-off Voltage (VWM) | 24 V - maximum continuous reverse operating voltage without significant leakage |
| Clamping Voltage (VC) | 38.9 V at 77.1 A (10/1000 μs) - limits peak voltage seen by protected IC/MOSFET during surge |
| Peak Pulse Power (PPPM) | 3000 W (10/1000 μs) - supports high-energy transients common in automotive load dump |
| ESD Rating | ±30 kV (IEC 61000-4-2 contact/air) - protects against human-body-model electrostatic discharge |
| Operating Temperature | −55 °C to +175 °C - enables deployment in under-hood and industrial environments |
| Package | SMC (DO-214AB) - industry-standard surface-mount outline with 7.75 mm × 6.22 mm footprint |
Pinout & Package
SMC3K24CAHM3_A uses the standard SMC (DO-214AB) package: molded plastic case with matte tin-plated leads, RoHS-compliant and halogen-free (HM3 suffix), meeting UL 94 V-0 flammability rating and JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Marked End) | Reverse-biased terminal for bidirectional clamping | No polarity marking on bidirectional variants; terminals are functionally symmetric for AC/DC line protection |
| Anode (Unmarked End) | Reverse-biased terminal for bidirectional clamping | Both terminals conduct equally in reverse avalanche - no functional distinction between anode/cathode in operation |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Protects both positive and negative transients on same device - eliminates need for dual-diode arrangements |
| 30 kW surge capability (8/20 μs) | Handles high-current lightning-induced surges per IEC 61000-4-5 - critical for telecom and industrial interfaces |
| AEC-Q101 qualification | Validated for automotive electronics including engine control units, body modules, and ADAS sensors |
| Low clamping ratio (VC/VBR ≈ 1.39) | Minimizes voltage overshoot during fast transients - preserves margin for 24 V system ICs with 40 V absolute max ratings |
| MSL Level 1 rating | Enables single-pass lead-free reflow without baking - reduces manufacturing complexity and cost |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Suppressing load-dump transients (ISO 16750-2 Pulse b) on 24 V battery-fed ECUs in commercial vehicles. IC Role / Device Role / Timing Role: Primary clamping element placed upstream of DC-DC converters and microcontrollers. Use Value: Limits peak voltage to ≤38.9 V during 101 V/400 ms pulses - prevents latch-up or gate oxide damage in 40 V-rated MOSFETs and LDOs. |
Use Scenario: Protecting analog sensor outputs (e.g., pressure, temperature) connected to CAN or LIN buses in factory automation. IC Role / Device Role / Timing Role: Low-capacitance (<100 pF) shunt protector on differential or single-ended signal traces. Use Value: Clamps ISO 7637-2 Pulse 3a/b transients to ±35 V while adding <0.5 pF parasitic capacitance - preserves signal integrity up to 1 MHz. |
| Telecom DC Power Interface | Consumer Appliance Motor Drive Protection |
Use Scenario: Safeguarding PoE-powered equipment inputs against induced surges from nearby AC wiring or lightning coupling. IC Role / Device Role / Timing Role: First-stage transient suppressor on 24–48 V DC input before primary filtering and regulation. Use Value: Absorbs 3000 W (10/1000 μs) without degradation - maintains >1000-cycle lifetime under repeated 24 V telecom surge profiles. |
Use Scenario: Shielding MCU GPIOs and H-bridge drivers from back-EMF spikes generated by brushed DC motors in smart home appliances. IC Role / Device Role / Timing Role: Localized TVS mounted adjacent to motor connector and driver ICs. Use Value: Responds in <1 ns to 200 V/50 ns spikes - clamps within 38.9 V before driver ICs exceed 40 V absolute maximum ratings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ24CA | Lower PPPM (600 W), SMB package (smaller footprint, higher RthJA = 110 °C/W) | Suitable for lower-energy transients (e.g., consumer USB ports); not rated for ISO 16750-2 load dump | Select when space-constrained and surge energy ≤600 W; verify thermal derating for ambient >85 °C |
| SMCJ24CA | Same SMC package, identical VBR/VC, but non-AEC-Q101 and no UL 497B recognition | Acceptable for industrial/commercial use where automotive qualification is not mandated | Choose for cost-sensitive non-automotive designs requiring identical electrical performance and footprint |
Compared with SMC3K24CAHM3_A, SMBJ24CA offers smaller size but reduced surge handling and thermal robustness, while SMCJ24CA matches form/fit/function but lacks automotive and safety certifications required for Tier 1 vehicle integration.
Availability
SMC3K24CAHM3_A is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor nodes, telecom power interfaces, and appliance motor control systems requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMC3K24CAHM3_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 diodes, rectifiers, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMC3K series is part of Vishay's TRANSZORB® TVS portfolio, engineered specifically for high-power transient suppression in harsh automotive and industrial environments where AEC-Q101 compliance and ISO 7637/16750 immunity are mandatory.
FAQ
What is the breakdown voltage tolerance for SMC3K24CAHM3_A?
The SMC3K24CAHM3_A has a specified breakdown voltage range of 26.7 V minimum to 29.5 V maximum at 1.0 mA test current, representing a ±5.2% tolerance about the nominal 24 V stand-off rating. This tight VBR distribution ensures consistent clamping behavior across production lots and supports reliable design margining for 24 V system protection.
Does SMC3K24CAHM3_A support lead-free reflow soldering?
Yes, SMC3K24CAHM3_A is qualified to MSL Level 1 per J-STD-020 and supports lead-free reflow with a maximum peak temperature of 260 °C. Its matte tin-plated leads comply with J-STD-002 and JESD 22-B102 solderability standards, and the HM3 suffix confirms halogen-free, RoHS-compliant construction with JESD 201 Class 2 whisker resistance.
How does SMC3K24CAHM3_A perform under ISO 7637-2 Pulse 1 conditions?
Under ISO 7637-2 Pulse 1 (−150 V, 2 ms, 10 Ω), the SMC3K24CAHM3_A clamps to −33 V, limiting the negative transient seen by downstream circuitry. This performance is verified in the Vishay datasheet (Document 98241, page 4) and confirms its suitability for protecting 24 V automotive electronics against inductive switching transients from relay or solenoid de-energization.
Is SMC3K24CAHM3_A suitable for protecting CAN bus lines?
SMC3K24CAHM3_A is not optimized for direct CAN bus line protection due to its relatively high junction capacitance (>100 pF at 0 V) and clamping voltage (38.9 V), which exceeds typical CAN transceiver common-mode limits. For CAN FD or high-speed CAN, lower-capacitance unidirectional TVS arrays like Vishay's ESD9L5.0ST5G are recommended; SMC3K24CAHM3_A is better suited for 24 V power rail or low-speed signal line protection.
What is the thermal resistance of SMC3K24CAHM3_A in standard PCB mounting?
The SMC3K24CAHM3_A has a junction-to-ambient thermal resistance (RthJA) of 90 °C/W when mounted on a standard FR4 PCB with 2 oz. copper per JEDEC 51-2A, and a junction-to-mount thermal resistance (RthJM) of 4.0 °C/W per JEDEC 51-14 TDIM method. These values enable accurate thermal derating calculations for sustained surge duty cycles in enclosed or high-ambient environments.
SMC3K24CAHM3_A/H 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):
- 24V
- Voltage - Breakdown (Min):
- 26.7V
- Voltage - Clamping (Max) @ Ipp:
- 38.9V
- Current - Peak Pulse (10/1000µs):
- 77.1A
- 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)
SMC3K24CAHM3_A/H FAQ
1.How can I place an order for SMC3K24CAHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMC3K24CAHM3_A/H 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 SMC3K24CAHM3_A/H reliable?
The price and inventory of SMC3K24CAHM3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMC3K24CAHM3_A/H is usually 5 days.
3.What payment methods are accepted for SMC3K24CAHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMC3K24CAHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMC3K24CAHM3_A/H?
SMC3K24CAHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMC3K24CAHM3_A/H 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 SMC3K24CAHM3_A/H?
For technical support, including SMC3K24CAHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMC3K24CAHM3_A/H requirements.
6.How does Aetrix verify that SMC3K24CAHM3_A/H is sourced from the original manufacturer or authorized distributors?
All SMC3K24CAHM3_A/H 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 SMC3K24CAHM3_A/H meets industry standards.
7.What is the process for return or replacement of SMC3K24CAHM3_A/H?
All SMC3K24CAHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMC3K24CAHM3_A/H, 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 SMC3K24CAHM3_A/H part is unused and in its original packaging.
Return procedure for SMC3K24CAHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMC3K24CAHM3_A/H Tags
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ESD9B5.0ST5G
onsemi
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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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