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Vishay General Semiconductor - Diodes Division SMC3K24CAHM3_A/I
- Part No.:
- SMC3K24CAHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMC3K24CAHM3_A/I.pdf
- Description:
- 3KW, 24V 5%,BIDIR,SMC TVS
- Quantity:
- Payment:
- Shipping:
Inventory:3,490
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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 sensitive electronics. It features 24 V standoff voltage (VWM), 26.7–29.5 V breakdown voltage (VBR), 38.9 V clamping voltage at 77.1 A (10/1000 μs), 3000 W peak pulse power, and AEC-Q101 qualification - deployed in automotive power line and sensor interface protection.
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, 30 kV ESD immunity per IEC 61000-4-2, bidirectional clamping behavior, thermal resistance (RthJA = 90 °C/W), and halogen-free RoHS-compliant construction.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector with fast response (<1 ns) and low incremental surge resistance, enabling effective suppression of transients induced by inductive load switching and load dump events. Its bidirectional architecture allows symmetric clamping above and below ground without polarity sensitivity.
It meets ISO 16750-2 Pulse b (load dump) and ISO 7637-2 Pulse 1 (inductive switch-off), delivering verified clamping voltages of –33 V / +33 V (Pulse 1) and –30 V / +35 V (Pulse 3b) under 12 V battery system conditions. Junction temperature range spans –55 °C to +175 °C, supporting under-hood automotive deployment.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 24 V - Maximum continuous reverse operating voltage before conduction begins; defines safe signal/power line operating margin. |
| VBR (min/max) | 26.7 V / 29.5 V - Breakdown voltage range at 1 mA test current; ensures reliable turn-on within defined tolerance band. |
| VC @ IPPM (10/1000 μs) | 38.9 V at 77.1 A - Clamping voltage during standardized surge; determines maximum stress imposed on protected IC or MOSFET. |
| PPPM | 3000 W - Peak pulse power handling capability with 10/1000 μs waveform; enables survival of high-energy automotive transients. |
| ESD Rating | ±30 kV (IEC 61000-4-2 contact/air) - Robust electrostatic discharge immunity; eliminates need for additional ESD staging in sensor interfaces. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and mechanical shock per AEC standard. |
| Package | SMC (DO-214AB) - Industry-standard surface-mount outline with 90 °C/W junction-to-ambient thermal resistance; compatible with automated reflow assembly. |
Pinout & Package
SMC3K24CAHM3_A uses the SMC (DO-214AB) package: molded plastic case with matte tin-plated leads, UL 94 V-0 flammability rating, and no polarity marking due to bidirectional functionality. Mounting pad layout follows JEDEC MS-013AC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Anode) | Surge current return path | Both terminals are electrically symmetrical; either terminal serves as current sink/source during transient events - no orientation required on PCB. |
| Anode (Cathode) | Surge current return path | Identical role to opposite terminal; bidirectional operation eliminates need for polarity-aware routing or silkscreen marking. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without external polarity management circuitry. |
| 3000 W peak pulse power (10/1000 μs) | Supports sustained suppression of high-energy transients common in 12 V automotive systems, including ISO 7637-2 Pulse 1 and Pulse 3b. |
| AEC-Q101 qualification | Validates long-term reliability under automotive environmental stresses (temperature cycling, humidity, vibration), reducing qualification burden for Tier 1 suppliers. |
| Halogen-free & RoHS-compliant (HM3 suffix) | Meets global environmental regulations and JESD201 Class 2 whisker resistance, ensuring solder joint integrity in high-reliability production. |
| MSL Level 1 (260 °C peak) | Allows unlimited floor life and compatibility with standard lead-free reflow profiles without baking or special handling. |
Applications
| Automotive Power Line Protection | Automotive Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V supply rails in engine control units (ECUs), body control modules (BCMs), and infotainment head units against load dump and inductive switching spikes. IC Role / Device Role / Timing Role: Shunt-type transient suppressor placed between power rail and ground, activated only during overvoltage events exceeding VWM. Use Value: Limits clamped voltage to ≤38.9 V during 77.1 A surges, preventing damage to downstream DC-DC converters and microcontrollers rated for 36 V max input. |
Use Scenario: Safeguarding analog and digital signal lines (e.g., LIN bus, analog sensor outputs) connected to pressure, temperature, or position sensors in harsh under-hood environments. IC Role / Device Role / Timing Role: Bidirectional voltage clamp on differential or single-ended sensor traces, responding within <1 ns to ESD or coupled noise. Use Value: Withstands ±30 kV ESD strikes and clamps ISO 7637-2 Pulse 3a (–220 V, 150 ns) to ±30 V, preserving ADC reference integrity and preventing false triggering. |
| Industrial Motor Drive Control | Telecom Power Input Stage |
Use Scenario: Shielding gate drivers and logic-level inputs in variable frequency drives (VFDs) and motor controllers from flyback transients generated by IGBT/MOSFET switching. IC Role / Device Role / Timing Role: Fast-acting parallel protector across control signal paths and auxiliary power supplies feeding isolated gate drivers. Use Value: Low clamping voltage (38.9 V) and high surge current capacity (77.1 A) prevent latch-up or permanent damage to 24 V-rated optocouplers and level translators. |
Use Scenario: Front-end surge protection for 48 V telecom rectifier outputs and PoE-powered equipment exposed to lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Primary clamping device in multi-stage protection architecture, absorbing bulk energy before downstream MOVs or GDTs engage. Use Value: 3000 W peak power rating and 8/20 μs clamping performance (51.6 V at 581 A) enable compliance with IEC 61000-4-5 Level 4 requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ24A-E3/5A (Vishay) | Lower PPPM (400 W), SMA package (higher RthJA ≈ 150 °C/W), unidirectional only. | Limited to lower-energy transients; requires polarity-aware placement; unsuitable for ISO 16750-2 Pulse b load dump. | Select when space-constrained layouts demand smaller footprint and surge energy is limited to <500 W. |
| 1.5KE24CA (ON Semiconductor) | Through-hole DO-201 package, same VWM/VBR/VC specs, but no AEC-Q101 qualification or MSL Level 1 rating. | Not qualified for automotive production; requires manual insertion or wave soldering; higher thermal resistance limits power density. | Choose for cost-sensitive industrial prototypes where AEC-Q101 and reflow compatibility are not mandatory. |
Compared with SMAJ24A-E3/5A and 1.5KE24CA, SMC3K24CAHM3_A delivers 7.5× higher pulse power, automotive-grade reliability, and surface-mount scalability - making it the preferred choice for production-grade 12 V automotive electronics requiring ISO 7637-2 and AEC-Q101 compliance.
Availability
SMC3K24CAHM3_A is available at Aetrix Electronics and suitable for automotive ECUs, industrial motor drives, telecom power inputs, and sensor interface circuits requiring stable component supply across extended temperature ranges and high-reliability manufacturing.
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 automotive, industrial, and computing applications.
The SMC3KxxCAHM3_A series is part of Vishay's TRANSZORB® TVS portfolio, engineered specifically for high-power, bidirectional transient suppression in automotive and industrial environments demanding AEC-Q101 validation and robust ISO 7637-2 immunity.
FAQ
What is the clamping voltage of SMC3K24CAHM3_A under a 10/1000 μs surge?
The SMC3K24CAHM3_A clamps to 38.9 V at its rated peak pulse current of 77.1 A with a 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 standards and represents the maximum voltage seen by protected circuitry during such an event - critical for ensuring downstream components remain within their absolute maximum ratings.
Is SMC3K24CAHM3_A suitable for automotive applications?
Yes, SMC3K24CAHM3_A is AEC-Q101 qualified and explicitly tested to ISO 7637-2 (Pulse 1, 2a, 3a, 3b) and ISO 16750-2 (Pulse b) standards. Its –55 °C to +175 °C operating range, MSL Level 1 reflow compatibility, and halogen-free HM3 construction make it certified for under-hood and chassis-mounted automotive electronics.
Does SMC3K24CAHM3_A have polarity markings on the package?
No, SMC3K24CAHM3_A is a bidirectional TVS diode and carries no polarity marking on the SMC (DO-214AB) case. Both terminals are functionally identical, allowing flexible PCB layout without orientation constraints - a key advantage for differential signal protection and space-constrained designs.
What is the maximum junction temperature rating for SMC3K24CAHM3_A?
The maximum junction temperature (TJ max.) for SMC3K24CAHM3_A is +175 °C, validated per JEDEC standards. This high thermal limit supports operation in under-hood automotive environments and high-power industrial applications where ambient temperatures exceed 125 °C, provided board-level thermal design maintains RthJA ≤ 90 °C/W.
How does SMC3K24CAHM3_A perform under IEC 61000-4-2 ESD testing?
SMC3K24CAHM3_A achieves ±30 kV contact discharge and ±30 kV air discharge per IEC 61000-4-2 - among the highest ESD immunity ratings for discrete TVS diodes. This performance eliminates secondary ESD protection stages in sensor interfaces and communication ports, simplifying BOM and improving system-level robustness.
SMC3K24CAHM3_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):
- 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/I FAQ
1.How can I place an order for SMC3K24CAHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMC3K24CAHM3_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 SMC3K24CAHM3_A/I reliable?
The price and inventory of SMC3K24CAHM3_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 SMC3K24CAHM3_A/I is usually 5 days.
3.What payment methods are accepted for SMC3K24CAHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMC3K24CAHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMC3K24CAHM3_A/I?
SMC3K24CAHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMC3K24CAHM3_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 SMC3K24CAHM3_A/I?
For technical support, including SMC3K24CAHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMC3K24CAHM3_A/I requirements.
6.How does Aetrix verify that SMC3K24CAHM3_A/I is sourced from the original manufacturer or authorized distributors?
All SMC3K24CAHM3_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 SMC3K24CAHM3_A/I meets industry standards.
7.What is the process for return or replacement of SMC3K24CAHM3_A/I?
All SMC3K24CAHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMC3K24CAHM3_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 SMC3K24CAHM3_A/I part is unused and in its original packaging.
Return procedure for SMC3K24CAHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMC3K24CAHM3_A/I Tags
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DESD3V3E1BL-7B
Diodes Incorporated
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