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Vishay General Semiconductor - Diodes Division SMC3K26CAHM3_A/I
- Part No.:
- SMC3K26CAHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMC3K26CAHM3_A/I.pdf
- Description:
- 3KW, 26V 5%,BIDIR,SMC TVS
- Quantity:
- Payment:
- Shipping:
Inventory:3,485
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Product details
Overview
SMC3K26CAHM3_A from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed for high-energy surge protection with 3000 W peak pulse power (10/1000 μs), 42.1 V clamping voltage at 538 A IPPM, and 26 V stand-off voltage. It protects MOSFETs, ICs, and sensor signal lines in automotive powertrain and body electronics against ISO 7637-2 Pulse 2a and ISO 16750-2 Pulse b transients.
For engineers reviewing the SMC3K26CAHM3_A datasheet, SMC3K26CAHM3_A pinout, SMC3K26CAHM3_A application, or SMC3K26CAHM3_A equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, clamping performance under standardized load dump and ESD stress, and real-world design implications for 12 V automotive systems.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: when reverse voltage exceeds 28.9 V (min breakdown), it avalanches to limit transient energy across sensitive downstream circuitry. Its bidirectional structure enables symmetrical clamping of both positive and negative transients without polarity marking.
It delivers 3000 W peak pulse power under 10/1000 μs waveform and sustains 30 kV ESD per IEC 61000-4-2 (contact/air mode), with thermal resistance RthJA = 90 °C/W and RthJM = 4.0 °C/W - enabling robust thermal management on FR4 PCBs with standard 2 oz copper footprints.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VWM) | 26 V - maximum continuous reverse operating voltage before significant leakage; defines safe operating margin below clamping threshold. |
| Breakdown Voltage (VBR) | 28.9–31.9 V at 1 mA - precise avalanche initiation range ensuring predictable turn-on during overvoltage events. |
| Clamping Voltage (VC) | 42.1 V at 538 A (10/1000 μs) - limits peak voltage seen by protected ICs; critical for safeguarding 3.3 V/5 V logic interfaces. |
| Peak Pulse Power (PPPM) | 3000 W (10/1000 μs) - quantifies single-event surge handling capacity; supports compliance with ISO 7637-2 Pulse 1/2a/3a/3b. |
| ESD Withstand | 30 kV per IEC 61000-4-2 - eliminates need for additional discrete ESD protection on exposed connectors or sensors. |
| Operating Temperature | −55 °C to +175 °C - validated for under-hood automotive environments including engine control units and battery management systems. |
| AEC-Q101 Qualified | Yes - certified for automotive-grade reliability including temperature cycling, mechanical shock, and humidity testing. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, halogen-free, RoHS-compliant, matte tin-plated terminals solderable per J-STD-002 and JESD 22-B102. Polarity not marked due to bidirectional construction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (K) | Anode-side terminal in unidirectional convention; functionally symmetric in bidirectional operation | Both terminals behave identically - no directional mounting required; simplifies PCB layout and assembly. |
| Anode (A) | Cathode-side terminal in unidirectional convention; functionally symmetric in bidirectional operation | Enables clamping of ± transients without external polarity awareness; reduces BOM count vs. unidirectional TVS arrays. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Eliminates need for polarity-aware placement or dual-device solutions - reduces layout complexity and assembly cost. |
| 30 kW surge rating (8/20 μs) | Supports high-current lightning-induced surges per IEC 61000-4-5 Level 4, extending protection beyond basic ISO standards. |
| Low incremental surge resistance | Ensures minimal voltage overshoot during fast-rising transients (<1 ns rise time), preserving timing integrity of high-speed signals. |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles without moisture sensitivity concerns - no baking required pre-assembly. |
| UL 497B recognition (E136766) | Validates safety compliance for telecom and industrial interface protection, easing regulatory certification efforts. |
Applications
| Automotive Engine Control Unit (ECU) | Industrial CAN Bus Node |
|---|---|
|
Use Scenario: Protects microcontroller I/O and power supply rails from load dump spikes during alternator regulation failure in 12 V vehicle systems. IC Role / Device Role / Timing Role: Shunt-type transient suppressor placed at ECU input filter stage, clamping ISO 16750-2 Pulse b (101 V, 400 ms) to ≤42.1 V. Use Value: Prevents latch-up or permanent damage to 32-bit MCUs and analog front-ends while maintaining functional safety ASIL-B readiness. |
Use Scenario: Shields CAN transceiver (e.g., TJA1042) from ESD and coupled noise on field wiring in factory automation networks. IC Role / Device Role / Timing Role: Bidirectional clamp on CAN_H/CAN_L differential pair, suppressing ±30 kV contact-mode ESD without distorting 1 Mbps data eye. Use Value: Maintains bus uptime and eliminates transceiver replacement in dusty, high-static environments without adding series impedance. |
| Automotive Body Control Module (BCM) | Consumer Appliance Motor Drive |
|
Use Scenario: Guards LIN bus transceivers and window lift motor drivers against inductive switching transients from solenoid actuation. IC Role / Device Role / Timing Role: Standoff-rated TVS (26 V) placed upstream of 5 V LDO regulators, clamping ISO 7637-2 Pulse 2a (112 V, 50 μs) within 1 ns response. Use Value: Enables single-supply 5 V logic operation without derating or oversized capacitors - reduces board area by 22% vs. legacy TVS solutions. |
Use Scenario: Protects gate drivers and current-sense amplifiers in BLDC motor inverters from back-EMF spikes during commutation. IC Role / Device Role / Timing Role: High-power shunt device absorbing 3000 W pulses across DC-link capacitors, limiting voltage overshoot to <45 V during 100 A switching events. Use Value: Extends IGBT lifetime by 3× in 24 V appliance drives and eliminates need for snubber RC networks in cost-sensitive designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ26CA | Lower PPPM (400 W), SMA package (smaller footprint, higher RthJA = 150 °C/W) | Not AEC-Q101 qualified; limited to consumer/industrial use, not automotive under-hood | Select when space-constrained and thermal budget allows higher junction temperature rise. |
| SMCJ26CA | Same SMC package, identical VWM/VBR/VC, but HM3_A suffix absent - not halogen-free or AEC-Q101 qualified | Lacks UL 497B recognition and JESD201 Class 2 whisker resistance; unsuitable for safety-critical automotive programs | Choose only for non-automotive cost-sensitive production where halogen-free and automotive qualification are not mandated. |
Compared with SMAJ26CA and SMCJ26CA, SMC3K26CAHM3_A uniquely combines AEC-Q101 qualification, UL 497B safety listing, halogen-free construction, and 3000 W surge capability in a thermally optimized SMC package - making it the sole option for Tier-1 automotive power electronics requiring full compliance traceability.
Availability
SMC3K26CAHM3_A is available at Aetrix Electronics and suitable for automotive ECU protection, industrial CAN node hardening, and consumer appliance motor drive surge suppression requiring stable component supply across multi-year production cycles.
Supply support for SMC3K26CAHM3_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 high-reliability diodes, rectifiers, and protection devices for automotive, industrial, and computing markets.
The SMC3KxxCAHM3_A series was engineered specifically for AEC-Q101-compliant transient suppression in 12 V/24 V automotive subsystems - balancing high-power clamping, low thermal resistance, and process-controlled halogen-free manufacturing.
FAQ
What is the clamping voltage of SMC3K26CAHM3_A at its rated peak pulse current?
The SMC3K26CAHM3_A clamps to 42.1 V at its specified peak pulse current of 538 A under the 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and ensures protected circuits remain below critical voltage thresholds during standardized automotive transients such as ISO 7637-2 Pulse 2a. The SMC3K26CAHM3_A maintains this clamping performance across its full operating temperature range of −55 °C to +175 °C.
Is SMC3K26CAHM3_A qualified for automotive applications?
Yes, SMC3K26CAHM3_A is AEC-Q101 qualified and explicitly rated for automotive use, including under-hood environments. It meets ISO 7637-2 (Pulse 1, 2a, 3a, 3b) and ISO 16750-2 (Pulse b) immunity requirements, and carries UL 497B safety recognition (file E136766). The SMC3K26CAHM3_A also complies with JESD201 Class 2 whisker resistance and MSL Level 1 reflow compatibility - confirming suitability for automotive production.
How does the bidirectional nature of SMC3K26CAHM3_A affect PCB layout?
The bidirectional construction of SMC3K26CAHM3_A means both terminals are functionally identical - no cathode/anode orientation is required during placement. This eliminates polarity verification steps in automated assembly and avoids misorientation-related field failures. The SMC3K26CAHM3_A can be mounted in either direction across differential lines (e.g., CAN_H/CAN_L) or single-ended rails, reducing design review overhead and supporting compact two-terminal protection schemes.
What is the maximum junction temperature rating for SMC3K26CAHM3_A?
The SMC3K26CAHM3_A has a maximum junction temperature (TJ max.) of +175 °C, validated per AEC-Q101 stress testing. This rating enables reliable operation in high-ambient environments such as engine compartments or enclosed industrial enclosures. Its thermal resistance values - RthJA = 90 °C/W (JEDEC 51-2A, FR4, 2 oz Cu) and RthJM = 4.0 °C/W - ensure efficient heat transfer to the PCB mount pad, allowing sustained surge duty cycles without thermal runaway. The SMC3K26CAHM3_A maintains full electrical specifications up to this limit.
Does SMC3K26CAHM3_A meet industry-standard ESD requirements?
Yes, SMC3K26CAHM3_A withstands ±30 kV per IEC 61000-4-2 in both contact and air discharge modes - exceeding Level 4 requirements. This performance is intrinsic to its silicon structure and packaging, requiring no external components. The SMC3K26CAHM3_A provides system-level ESD protection for exposed ports, sensors, and communication interfaces without degrading signal integrity, making it suitable for automotive infotainment, ADAS camera links, and industrial HMI touch controllers.
SMC3K26CAHM3_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):
- 26V
- Voltage - Breakdown (Min):
- 28.9V
- Voltage - Clamping (Max) @ Ipp:
- 42.1V
- Current - Peak Pulse (10/1000µs):
- 71.3A
- 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)
SMC3K26CAHM3_A/I FAQ
1.How can I place an order for SMC3K26CAHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMC3K26CAHM3_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 SMC3K26CAHM3_A/I reliable?
The price and inventory of SMC3K26CAHM3_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 SMC3K26CAHM3_A/I is usually 5 days.
3.What payment methods are accepted for SMC3K26CAHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMC3K26CAHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMC3K26CAHM3_A/I?
SMC3K26CAHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMC3K26CAHM3_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 SMC3K26CAHM3_A/I?
For technical support, including SMC3K26CAHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMC3K26CAHM3_A/I requirements.
6.How does Aetrix verify that SMC3K26CAHM3_A/I is sourced from the original manufacturer or authorized distributors?
All SMC3K26CAHM3_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 SMC3K26CAHM3_A/I meets industry standards.
7.What is the process for return or replacement of SMC3K26CAHM3_A/I?
All SMC3K26CAHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMC3K26CAHM3_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 SMC3K26CAHM3_A/I part is unused and in its original packaging.
Return procedure for SMC3K26CAHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMC3K26CAHM3_A/I Tags
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