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Vishay General Semiconductor - Diodes Division SMC3K24CAHM3/9A
- Part No.:
- SMC3K24CAHM3/9A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMC3K24CAHM3/9A.pdf
- Description:
- TVS DIODE 24VWM 38.9VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,692
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Product details
Overview
SMC3K24CAHM3/9A from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, rated for 3000 W peak pulse power (10/1000 μs), 24 V stand-off voltage, 26.7–29.5 V breakdown voltage at 1 mA, and clamps to ≤38.9 V at 77.1 A surge current. It protects MOSFETs, ICs, and sensor signal lines in automotive and industrial power electronics.
For engineers reviewing the SMC3K24CAHM3/9A datasheet, SMC3K24CAHM3/9A pinout, SMC3K24CAHM3/9A application, or SMC3K24CAHM3/9A equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, 150 °C max junction temperature, UL 497B safety recognition, and compatibility with automated SMT assembly per J-STD-002.
Technical Context
This TVS diode operates as a voltage-clamping protection device across sensitive nodes, responding within picoseconds to transient overvoltages induced by inductive switching or ESD events. Its low incremental surge resistance and fast response time ensure minimal let-through energy during 3000 W surges.
The SMC3K24CAHM3/9A is specifically qualified to AEC-Q101 and built with halogen-free, RoHS-compliant materials. It meets MSL Level 1 per J-STD-020 and supports reflow soldering up to 260 °C peak, but is not recommended for PCB bottom-side wave mounting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 24 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 26.7 V / 29.5 V at 1 mA - Ensures reliable turn-on above system nominal voltage with margin |
| VC @ IPPM | ≤38.9 V at 77.1 A - Clamped voltage limits stress on downstream 3.3 V/5 V/24 V logic or power stages |
| PPPM | 3000 W (10/1000 μs) - Withstands high-energy transients common in automotive load-dump or inductive kick scenarios |
| TJ max | 150 °C - Enables operation in under-hood or industrial ambient environments without derating |
| Polarity | Bidirectional - Protects AC-coupled or dual-rail signal lines without polarity constraints |
| Package | SMC (DO-214AB) - Standardized 8.0 mm × 8.0 mm copper pad footprint compatible with IPC-7351B |
Pinout & Package
SMC3K24CAHM3/9A uses the standard SMC (DO-214AB) surface-mount package: molded epoxy case with matte tin-plated leads, 0.220–0.246 inch cathode-to-anode length, 0.114–0.126 inch width, and 0.079–0.103 inch height. Bidirectional variants have no polarity marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Both terminals function identically; no directional installation required for bidirectional clamping |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per JEDEC standards |
| UL 497B recognition | E136766 file number confirms compliance with safety requirements for telecom and industrial signal-line protection |
| MSL Level 1 rating | Unlimited floor life at ≤30 °C/85 % RH; supports single-reflow without baking |
| Halogen-free & RoHS | Meets IEC 61249-2-21 and EU RoHS Directive 2011/65/EU for green manufacturing |
Applications
| Automotive Power Distribution | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 24 V CAN bus transceivers and microcontroller I/O against load-dump transients and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Voltage-clamping TVS placed directly across power rail or signal line input. Use Value: Limits clamped voltage to ≤38.9 V, preventing damage to 36 V-tolerant CAN PHY and MCU GPIOs during 3000 W surges. | Use Scenario: Shielding analog output lines of pressure/temperature sensors in factory automation PLC modules. IC Role / Device Role / Timing Role: Bidirectional shunt protector on 4–20 mA current-loop or 0–10 V analog outputs. Use Value: Maintains signal integrity under 1 kV EFT bursts by clamping reversals without polarity dependency or DC offset. |
| Consumer Power Adapter Input Stage | Telecom Line Card Surge Protection |
Use Scenario: Secondary-side overvoltage suppression in 12 V/24 V wall adapters exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Standoff-rated TVS placed after rectifier and bulk capacitor to absorb residual transients. Use Value: 24 V VWM ensures no leakage during normal operation; 3000 W PPPM handles worst-case IEC 61000-4-5 combination wave events. | Use Scenario: Primary protection for Ethernet PHY interfaces and POTS line drivers in network edge equipment. IC Role / Device Role / Timing Role: First-stage shunt suppressor on differential pairs or tip/ring lines. Use Value: Bidirectional symmetry enables identical protection on both conductors; UL 497B recognition validates safety compliance for telecom infrastructure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMC3K24CAHM3_A | Same electrical specs and AEC-Q101 qualification; updated suffix denotes revised internal test flow per Vishay revision control | No functional or layout impact; identical SMC package and pinout | Preferred for new designs where long-term supply continuity is prioritized |
| SMAJ24CA | Lower PPPM (400 W), smaller SMA package, same VWM/VBR range, non-AEC-Q101 | Not suitable for automotive or high-energy industrial transients; limited to consumer-grade surge immunity | Select only for cost-sensitive, low-risk applications with <500 W surge exposure |
Compared with SMC3K24CAHM3/9A, SMC3K24CAHM3_A offers identical performance with enhanced long-term manufacturability, while SMAJ24CA trades robustness for size and cost-making it viable only where 3000 W clamping is unnecessary.
Availability
SMC3K24CAHM3/9A is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interface protection, and telecom line card surge protection requiring stable component supply and AEC-Q101 assurance.
Supply support for SMC3K24CAHM3/9A 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 validation.
The SMC3KxxCA family was designed for high-energy transient suppression in harsh environments-including automotive under-hood, industrial motor drives, and telecom infrastructure-where 3000 W surge handling and AEC-Q101 compliance are mandatory.
FAQ
What does the "HM3" suffix indicate in SMC3K24CAHM3/9A?
The HM3 suffix denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. It distinguishes this grade from commercial M3 variants and confirms compliance with automotive reliability standards, including temperature cycling, highly accelerated life testing, and electrostatic discharge robustness per JESD22-A114.
Is SMC3K24CAHM3/9A suitable for new designs?
No-Vishay explicitly marks SMC3K24CAHM3/9A as "Not for New Designs." The recommended alternative is SMC3K24CAHM3_A, which maintains identical electrical and mechanical specifications while incorporating updated process controls and extended product lifecycle support.
What is the maximum clamping voltage of SMC3K24CAHM3/9A under surge conditions?
The maximum clamping voltage VC of SMC3K24CAHM3/9A is 38.9 V when subjected to its rated peak pulse current of 77.1 A (10/1000 μs waveform). This value is guaranteed per Vishay's Electrical Characteristics table and defines the upper voltage limit imposed on protected circuitry during transient events.
Does SMC3K24CAHM3/9A require orientation during PCB placement?
No-SMC3K24CAHM3/9A is a bidirectional TVS diode with symmetrical anode/cathode terminals and no polarity marking. It can be placed in either orientation on the PCB without affecting clamping behavior or electrical performance.
What tape-and-reel packaging does SMC3K24CAHM3/9A use?
SMC3K24CAHM3/9A ships in 13-inch diameter plastic tape and reel format with a base quantity of 3500 units per reel (package code "9A"). This configuration supports high-speed pick-and-place assembly and aligns with IPC-7351B land pattern recommendations for the SMC (DO-214AB) outline.
SMC3K24CAHM3/9A 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
SMC3K24CAHM3/9A FAQ
1.How can I place an order for SMC3K24CAHM3/9A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMC3K24CAHM3/9A 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 SMC3K24CAHM3/9A reliable?
The price and inventory of SMC3K24CAHM3/9A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMC3K24CAHM3/9A is usually 5 days.
3.What payment methods are accepted for SMC3K24CAHM3/9A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMC3K24CAHM3/9A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMC3K24CAHM3/9A?
SMC3K24CAHM3/9A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMC3K24CAHM3/9A 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 SMC3K24CAHM3/9A?
For technical support, including SMC3K24CAHM3/9A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMC3K24CAHM3/9A requirements.
6.How does Aetrix verify that SMC3K24CAHM3/9A is sourced from the original manufacturer or authorized distributors?
All SMC3K24CAHM3/9A 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 SMC3K24CAHM3/9A meets industry standards.
7.What is the process for return or replacement of SMC3K24CAHM3/9A?
All SMC3K24CAHM3/9A units undergo pre-shipment inspection (PSI). If there is an issue with SMC3K24CAHM3/9A, 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 SMC3K24CAHM3/9A part is unused and in its original packaging.
Return procedure for SMC3K24CAHM3/9A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMC3K24CAHM3/9A Tags
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