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Vishay General Semiconductor - Diodes Division SMC3K24CAHM3/57
- Part No.:
- SMC3K24CAHM3/57
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMC3K24CAHM3/57.pdf
- Description:
- TVS DIODE 24VWM 38.9VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,610
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Product details
Overview
SMC3K24CAHM3/57 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 (VWM), 26.7–29.5 V breakdown voltage (VBR), and 77.1 A peak pulse current (IPPM). It provides clamping at 38.9 V and operates from –55 °C to +150 °C, qualified to AEC-Q101 for automotive electronics protection.
For engineers reviewing the SMC3K24CAHM3/57 datasheet, SMC3K24CAHM3/57 pinout, SMC3K24CAHM3/57 application, or SMC3K24CAHM3/57 equivalent, key selection criteria include its bidirectional polarity, low clamping voltage relative to VWM, MSL Level 1 moisture sensitivity, halogen-free RoHS-compliant construction, and AEC-Q101 qualification for under-hood and sensor-line surge protection.
Technical Context
This TVS diode uses an avalanche-based silicon junction to clamp transient overvoltages before they damage downstream ICs or MOSFETs. Its fast response time (<1 ns) and low incremental surge resistance ensure effective suppression of ESD, inductive switching spikes, and lightning-induced surges on signal or power lines.
Designed for unidirectional PCB top-side mounting only, it meets UL 497B safety recognition (E136766) and J-STD-020 MSL Level 1 with 260 °C reflow peak. The HM3 suffix confirms AEC-Q101 qualification, matte tin plating per J-STD-002, and JESD201 Class 2 whisker resistance.
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 - breakdown occurs within this range at 1 mA test current, defining turn-on threshold |
| VC @ IPPM | 38.9 V - clamped voltage at 77.1 A peak pulse, limiting stress on protected circuitry |
| PPPM | 3000 W - peak transient energy handling capability with standard 10/1000 μs waveform |
| TJ max | +150 °C - maximum junction temperature enabling operation in under-hood automotive environments |
| Polarity | Bidirectional - protects against both positive and negative transients without polarity orientation constraints |
| Package | SMC (DO-214AB) - industry-standard surface-mount outline with 8.0 mm × 8.0 mm copper pad area recommendation |
Pinout & Package
SMC3K24CAHM3/57 is housed in a two-terminal SMC (DO-214AB) package with no polarity marking for bidirectional types. Terminals are matte tin-plated leads, solderable per J-STD-002 and JESD22-B102, and meet JESD201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (unmarked) | Transient current return path | Both terminals function symmetrically; no functional distinction - bidirectional conduction path |
| Anode (unmarked) | Transient current entry point | Same physical terminal as cathode; identical electrical behavior in either direction |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock testing |
| UL 497B recognition | E136766 file number confirms compliance for use in telecom and industrial surge protection circuits |
| MSL Level 1 rating | Zero floor life limitation - can be stored indefinitely before reflow without baking |
| Halogen-free & RoHS | HM3 suffix guarantees compliant materials meeting automotive and EU environmental requirements |
| Low clamping ratio (VC/VWM) | 1.62 - ensures tight voltage margin between operating and clamping levels for sensitive 24 V systems |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load-dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Standby shunt clamping device placed directly at connector or IC input pins. Use Value: Clamps transients to 38.9 V while maintaining 24 V system compatibility and surviving repeated 77.1 A surges. |
Use Scenario: Safeguarding 24 V DC digital input modules in programmable logic controllers against field-wiring induced surges. IC Role / Device Role / Timing Role: Primary front-end transient suppressor on isolated input channels. Use Value: Enables robust operation in factory environments with high EMI and inductive switching noise due to 3000 W pulse rating and AEC-Q101 validation. |
| Telecom Power Interface | Consumer Appliance Motor Control |
Use Scenario: Surge protection on 24 V auxiliary power rails feeding base station RF modules and backhaul interfaces. IC Role / Device Role / Timing Role: Secondary-level TVS on regulated DC supply lines upstream of LDOs or DC-DC converters. Use Value: Prevents latch-up or burnout in power management ICs during lightning-induced common-mode surges on outdoor-facing ports. |
Use Scenario: Suppressing commutation spikes from brushed DC motors in smart home appliances (e.g., washing machines, HVAC blowers). IC Role / Device Role / Timing Role: Low-inductance parallel clamp across motor terminals or H-bridge outputs. Use Value: Limits voltage overshoot to ≤38.9 V during turn-off, protecting MOSFETs rated for 40–60 V drain-source breakdown. |
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/57 | Same electrical specs and AEC-Q101 qualification; updated revision with enhanced traceability and updated packaging documentation | No functional change - intended as direct replacement for legacy SMC3K24CAHM3/57 in new designs | Select when sourcing newly released production lots requiring latest Vishay revision control and documentation alignment |
| SMC3K22CAHM3/57 | Lower VWM (22 V) and VBR (24.4–26.9 V); same PPPM (3000 W), VC (35.5 V), and package | Better suited for 20–22 V nominal systems where tighter clamping margin is required | Choose for 22 V rail protection where lower stand-off avoids leakage concerns near system overvoltage thresholds |
Compared with SMC3K24CAHM3/57, the SMC3K24CAHM3_A/57 offers identical performance with updated manufacturing traceability, while SMC3K22CAHM3/57 trades 2 V lower VWM for improved margin in 22 V systems - neither requires PCB redesign but differ in system voltage alignment and revision status.
Availability
SMC3K24CAHM3/57 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, and telecom power interfaces requiring stable component supply, long-term lifecycle support, and AEC-Q101-qualified surge protection.
Supply support for SMC3K24CAHM3/57 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 SMC3KxxCAHM3 series belongs to Vishay's TRANSZORB® TVS platform, engineered specifically for high-energy transient suppression in harsh automotive and industrial environments where AEC-Q101 compliance and 3000 W pulse handling are mandatory.
FAQ
What does the 'HM3' suffix mean in SMC3K24CAHM3/57?
The HM3 suffix in SMC3K24CAHM3/57 indicates halogen-free, RoHS-compliant construction with AEC-Q101 qualification, matte tin-plated leads meeting J-STD-002 solderability, and JESD201 Class 2 whisker resistance. It distinguishes this automotive-grade variant from commercial M3 versions and confirms full compliance with automotive reliability standards.
Is SMC3K24CAHM3/57 suitable for bottom-side wave soldering?
No, SMC3K24CAHM3/57 is not recommended for PCB bottom-side wave mounting per Vishay's datasheet. Its thermal mass and package geometry risk insufficient solder joint formation and potential delamination. Reflow soldering is the validated assembly method, supported by its MSL Level 1 rating and 260 °C peak reflow tolerance.
How does the clamping voltage of SMC3K24CAHM3/57 compare to its stand-off voltage?
SMC3K24CAHM3/57 clamps at 38.9 V under 77.1 A peak pulse, resulting in a clamping ratio (VC/VWM) of 1.62. This tight ratio ensures protected circuits - such as 24 V microcontrollers or CAN transceivers - remain below their absolute maximum ratings during surge events, minimizing risk of overvoltage damage.
Can SMC3K24CAHM3/57 replace older SMC3K24CA-M3/57 parts?
Yes, SMC3K24CAHM3/57 is a drop-in replacement for SMC3K24CA-M3/57 in most applications, offering identical electrical parameters plus AEC-Q101 qualification and enhanced material compliance. However, designers should verify layout thermal relief and reflow profile compatibility, as HM3's qualification adds no dimensional changes but reinforces automotive use cases.
What is the maximum operating temperature range for SMC3K24CAHM3/57?
SMC3K24CAHM3/57 has a specified operating junction and storage temperature range of –55 °C to +150 °C. This wide range supports deployment in under-hood automotive locations, industrial enclosures exposed to ambient extremes, and outdoor telecom equipment, provided PCB copper pad area and airflow meet Vishay's thermal derating guidelines.
SMC3K24CAHM3/57 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)
SMC3K24CAHM3/57 FAQ
1.How can I place an order for SMC3K24CAHM3/57 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMC3K24CAHM3/57 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 SMC3K24CAHM3/57 reliable?
The price and inventory of SMC3K24CAHM3/57 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMC3K24CAHM3/57 is usually 5 days.
3.What payment methods are accepted for SMC3K24CAHM3/57?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMC3K24CAHM3/57 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMC3K24CAHM3/57?
SMC3K24CAHM3/57 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMC3K24CAHM3/57 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 SMC3K24CAHM3/57?
For technical support, including SMC3K24CAHM3/57 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMC3K24CAHM3/57 requirements.
6.How does Aetrix verify that SMC3K24CAHM3/57 is sourced from the original manufacturer or authorized distributors?
All SMC3K24CAHM3/57 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 SMC3K24CAHM3/57 meets industry standards.
7.What is the process for return or replacement of SMC3K24CAHM3/57?
All SMC3K24CAHM3/57 units undergo pre-shipment inspection (PSI). If there is an issue with SMC3K24CAHM3/57, 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 SMC3K24CAHM3/57 part is unused and in its original packaging.
Return procedure for SMC3K24CAHM3/57:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMC3K24CAHM3/57 Tags
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