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Vishay General Semiconductor - Diodes Division SMC3K24CA-M3/9A
- Part No.:
- SMC3K24CA-M3/9A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMC3K24CA-M3/9A.pdf
- Description:
- TVS DIODE 24VWM 38.9VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,155
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Product details
Overview
SMC3K24CA-M3/9A 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, and 38.9 V maximum clamping voltage at 77.1 A surge current. It protects MOSFETs, ICs, and sensor signal lines against inductive switching transients and lightning surges in automotive and industrial electronics.
For engineers reviewing the SMC3K24CA-M3/9A datasheet, SMC3K24CA-M3/9A pinout, SMC3K24CA-M3/9A application, or SMC3K24CA-M3/9A equivalent, key selection criteria include bidirectional polarity, AEC-Q101 qualification, MSL Level 1 moisture sensitivity, 26.7–29.5 V breakdown range, and halogen-free RoHS-compliant construction with matte tin-plated leads.
Technical Context
This TVS diode operates as a voltage-clamping protection device across sensitive nodes, responding within picoseconds to transient overvoltages exceeding its breakdown threshold. Its low incremental surge resistance and fast response time ensure minimal let-through energy during 10/1000 μs surges up to 77.1 A.
The device is designed for unidirectional PCB mounting only - not recommended for bottom-side wave soldering - and features UL 497B recognition (E136766), JESD201 Class 2 whisker resistance, and compliance with ANSI/IEEE C62.35 surge standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (10/1000 μs) | 3000 W - sustains high-energy transients without failure in automotive load-dump or inductive switch-off events |
| Stand-off Voltage (VWM) | 24 V - maximum continuous reverse operating voltage before conduction begins |
| Breakdown Voltage (VBR) | 26.7–29.5 V at 1 mA - defined voltage range where avalanche conduction initiates reliably |
| Clamping Voltage (VC) | 38.9 V at 77.1 A - maximum voltage seen by protected circuit during full-rated surge |
| Junction Temperature Range | −55 °C to +150 °C - supports operation in under-hood automotive and industrial ambient environments |
| Package | SMC (DO-214AB) - standardized surface-mount outline with 8.0 mm × 8.0 mm copper pad area for thermal dissipation |
| Polarity | Bidirectional - symmetric clamping for AC-coupled or floating signal lines without polarity concerns |
Pinout & Package
SMC3K24CA-M3/9A uses the standard SMC (DO-214AB) package: molded plastic case with two coplanar cathode/anode terminals, no polarity marking on bidirectional variants, matte tin-plated leads compliant with J-STD-002 and JESD22-B102 solderability requirements.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during negative transient | One of two symmetrical terminals; bidirectional operation means either terminal serves as anode or cathode depending on transient polarity |
| Cathode | Current exit terminal during positive transient | Electrically identical to anode in bidirectional configuration; no physical marking distinguishes terminals |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per stress test conditions |
| MSL Level 1 rating | Unlimited floor life at ≤30 °C/85 % RH - no baking required prior to reflow assembly |
| UL 497B recognition | E136766 file number confirms safety compliance for telecom and industrial surge protection applications |
| Halogen-free & RoHS | M3 suffix denotes halogen-free molding compound and lead-free matte tin plating meeting EU RoHS Directive 2011/65/EU |
| Low clamping ratio (VC/VWM) | 1.62 - ensures protected circuit remains below critical overvoltage thresholds during worst-case surge |
Applications
| Automotive Powertrain Control | Industrial Sensor Signal Protection |
|---|---|
Use Scenario: Protecting microcontroller I/O and gate drivers in engine control units exposed to alternator load dump and solenoid coil flyback. IC Role / Device Role / Timing Role: Voltage-clamping TVS placed across power rails and signal lines to limit transient excursions below IC absolute maximum ratings. Use Value: Enables robust operation at junction temperatures up to 150 °C while maintaining 38.9 V clamping at 77.1 A - sufficient to suppress ISO 7637-2 Pulse 5a transients. |
Use Scenario: Shielding analog output lines of pressure/temperature sensors in factory automation PLC modules from EMI and relay contact bounce. IC Role / Device Role / Timing Role: Bidirectional shunt protector on 4–20 mA current loop outputs and differential RS-485 bus lines. Use Value: Symmetric clamping prevents signal distortion on AC-coupled or floating interfaces; 2.0 μA leakage at 24 V minimizes measurement error in precision analog paths. |
| Telecom Line Interface | Consumer Appliance Motor Drive |
Use Scenario: Safeguarding Ethernet PHY transceivers and PoE injectors against lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Primary-level TVS on RJ45 jack secondary side, coordinated with GDT or polymer PTC upstream. Use Value: 3000 W peak power rating handles IEC 61000-4-5 Combination Wave (10/700 μs) surges when used with appropriate series impedance. |
Use Scenario: Suppressing commutation spikes from universal motor brushes in washing machines and HVAC blowers. IC Role / Device Role / Timing Role: Across-motor terminals and across TRIAC/SCR gate drive lines to prevent false triggering and latch-up. Use Value: Fast response time limits voltage overshoot to <40 V, preserving gate oxide integrity of driving semiconductors and reducing EMI emissions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMC3K24CAHM3/9A | AEC-Q101 qualified version with identical electrical specs; HM3 suffix indicates automotive qualification grade | Required for new automotive designs requiring formal AEC-Q101 certification documentation | Select SMC3K24CAHM3/9A when automotive PPAP or qualification traceability is mandated |
| SMC3K24CA-M3/57 | Same electrical and mechanical specs; differs only in packaging - 7" tape reel (850 pcs) vs. 13" reel (3500 pcs) | Suitable for low-volume prototyping or small-batch production where reel size impacts feeder compatibility | Choose SMC3K24CA-M3/57 for evaluation boards or pilot runs with standard 7" pick-and-place feeders |
Compared with SMC3K24CA-M3/9A, the HM3 variant adds formal AEC-Q101 qualification evidence for automotive OEM programs, while the /57 variant offers smaller reel quantity for design validation - neither changes clamping behavior, thermal performance, or PCB layout.
Availability
SMC3K24CA-M3/9A is available at Aetrix Electronics and suitable for automotive powertrain control, industrial sensor signal protection, telecom line interface, and consumer appliance motor drive applications requiring stable component supply and long-term manufacturability assurance.
Supply support for SMC3K24CA-M3/9A 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 high-reliability, high-power, and automotive-qualified components.
The SMC3KxxCA series was developed specifically for high-energy transient suppression in harsh-environment applications, targeting automotive, industrial, and telecom systems where 3000 W surge handling and AEC-Q101 compliance are mandatory.
FAQ
What does the "-M3/9A" suffix mean in SMC3K24CA-M3/9A?
The "-M3" suffix indicates halogen-free, RoHS-compliant construction with matte tin-plated leads meeting JESD201 Class 2 whisker resistance, while "/9A" specifies packaging in a 13-inch diameter plastic tape and reel containing 3500 units. This format aligns with Vishay's standardized ordering nomenclature for commercial-grade SMC-packaged TVS diodes. The SMC3K24CA-M3/9A is not AEC-Q101 qualified - that requires the HM3 suffix.
Is SMC3K24CA-M3/9A suitable for automotive applications?
SMC3K24CA-M3/9A is not AEC-Q101 qualified and is explicitly marked "Not for New Designs" in Vishay's documentation. While it shares identical electrical characteristics with the AEC-Q101-qualified SMC3K24CAHM3/9A, the -M3 version lacks formal automotive stress-test validation. For new automotive programs, engineers must specify SMC3K24CAHM3/9A; SMC3K24CA-M3/9A may be used only in legacy non-automotive or industrial contexts.
What is the clamping voltage of SMC3K24CA-M3/9A at its rated surge current?
The SMC3K24CA-M3/9A has a maximum clamping voltage (VC) of 38.9 V when subjected to its rated peak pulse current (IPPM) of 77.1 A using the standard 10/1000 μs waveform. This value is measured at TJ = 25 °C and defines the upper voltage limit imposed on protected circuitry during full-rated transient events. Clamping voltage increases slightly with junction temperature but remains within specification up to TJ = 150 °C.
Does SMC3K24CA-M3/9A have polarity markings on the package?
No, SMC3K24CA-M3/9A does not have polarity markings because it is a bidirectional TVS diode. The SMC (DO-214AB) package contains two electrically symmetrical terminals - either can serve as anode or cathode depending on transient polarity. Vishay specifies "no marking on bidirectional types," and board layout must treat both terminals identically. Polarity-sensitive designs require unidirectional variants like SMC3K24A-M3/9A.
What is the maximum operating temperature for SMC3K24CA-M3/9A?
The SMC3K24CA-M3/9A has a maximum junction temperature (TJ max.) of +150 °C and an operating junction/storage temperature range of −55 °C to +150 °C. This rating enables use in under-hood automotive locations, industrial motor drives, and other high-ambient environments. Derating curves in the datasheet show peak pulse power decreases linearly above TA = 25 °C, reaching ~70 % of 3000 W at TA = 100 °C.
SMC3K24CA-M3/9A 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
SMC3K24CA-M3/9A FAQ
1.How can I place an order for SMC3K24CA-M3/9A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMC3K24CA-M3/9A 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 SMC3K24CA-M3/9A reliable?
The price and inventory of SMC3K24CA-M3/9A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMC3K24CA-M3/9A is usually 5 days.
3.What payment methods are accepted for SMC3K24CA-M3/9A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMC3K24CA-M3/9A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMC3K24CA-M3/9A?
SMC3K24CA-M3/9A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMC3K24CA-M3/9A 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 SMC3K24CA-M3/9A?
For technical support, including SMC3K24CA-M3/9A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMC3K24CA-M3/9A requirements.
6.How does Aetrix verify that SMC3K24CA-M3/9A is sourced from the original manufacturer or authorized distributors?
All SMC3K24CA-M3/9A 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 SMC3K24CA-M3/9A meets industry standards.
7.What is the process for return or replacement of SMC3K24CA-M3/9A?
All SMC3K24CA-M3/9A units undergo pre-shipment inspection (PSI). If there is an issue with SMC3K24CA-M3/9A, 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 SMC3K24CA-M3/9A part is unused and in its original packaging.
Return procedure for SMC3K24CA-M3/9A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMC3K24CA-M3/9A Tags
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