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Vishay General Semiconductor - Diodes Division SMC3K26CAHM3/57
- Part No.:
- SMC3K26CAHM3/57
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMC3K26CAHM3/57.pdf
- Description:
- TVS DIODE 26VWM 42.1VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:1,653
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Product details
Overview
SMC3K26CAHM3/57 from Vishay General Semiconductor is a bidirectional surface-mount TRANSZORB® transient voltage suppressor (TVS) in SMC (DO-214AB) package, rated for 3000 W peak pulse power (10/1000 μs), 28.9–31.9 V breakdown voltage, and 42.1 V maximum clamping voltage at 71.3 A surge current. It protects MOSFETs, ICs, and sensor signal lines against inductive switching transients and lightning surges in automotive and industrial systems.
For engineers reviewing the SMC3K26CAHM3/57 datasheet, SMC3K26CAHM3/57 pinout, SMC3K26CAHM3/57 application, or SMC3K26CAHM3/57 equivalent, key selection criteria include bidirectional polarity, AEC-Q101 qualification, 150 °C max junction temperature, halogen-free RoHS-compliant construction, and compatibility with wave-soldering restrictions on PCB bottom side mounting.
Technical Context
This TVS diode operates as a voltage-clamping protection device triggered by overvoltage events exceeding its standoff voltage (VWM = 26 V). Its low incremental surge resistance and fast response time ensure minimal let-through energy during transient suppression.
The device is designed for unidirectional layout integration despite bidirectional polarity - no polarity marking on the case - and meets J-STD-020 MSL level 1 with 260 °C reflow peak. It is qualified per AEC-Q101 and UL 497B (E136766), confirming suitability for automotive-grade electronics.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 3000 W (10/1000 μs waveform): sustains high-energy transients without failure in automotive load-dump or inductive kick scenarios |
| Breakdown Voltage (VBR) | 28.9–31.9 V at 1 mA: defines precise voltage threshold where clamping initiates, ensuring reliable protection margin above 26 V system rail |
| Standoff Voltage (VWM) | 26 V: maximum continuous reverse operating voltage before leakage exceeds 2 μA, compatible with 24 V nominal automotive systems |
| Clamping Voltage (VC) | 42.1 V at 71.3 A IPPM: limits downstream voltage stress to safe levels for 3.3 V/5 V logic and gate drivers during surge events |
| Junction Temperature Range | −55 °C to +150 °C: supports operation in under-hood automotive environments and industrial enclosures without derating |
| Package | SMC (DO-214AB): industry-standard 8.0 mm × 8.0 mm copper pad footprint enabling thermal dissipation up to 3 kW |
| Qualification | AEC-Q101 qualified & UL 497B recognized (E136766): validated for automotive safety-critical circuits and regulatory compliance |
Pinout & Package
SMC3K26CAHM3/57 uses a 2-terminal SMC (DO-214AB) package with no polarity marking for bidirectional operation. Terminals are matte tin-plated leads, solderable per J-STD-002 and JESD 22-B102, and meet JESD 201 class 2 whisker test requirements.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Anode) | Transient conduction path (bidirectional) | Both terminals function identically; no DC polarity dependency - connects across protected line and ground or between differential lines |
| Anode (Cathode) | Transient conduction path (bidirectional) | Identical terminal behavior; enables placement flexibility without orientation constraints on PCB layout |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional polarity only | Eliminates need for orientation verification during automated placement; simplifies design for AC-coupled or floating signal lines |
| 3000 W peak pulse power (10/1000 μs) | Handles severe ISO 7637-2 Pulse 5a/b load-dump events in 24 V vehicle systems without degradation |
| AEC-Q101 qualification | Validated for automotive under-hood use including temperature cycling, humidity bias, and mechanical shock per stress test requirements |
| Halogen-free, RoHS-compliant HM3 suffix | Meets automotive OEM material compliance mandates and supports lead-free reflow profiles up to 260 °C peak |
| MSL level 1 moisture sensitivity | Enables direct placement from dry pack without baking; reduces manufacturing overhead and handling risk |
Applications
| Automotive Power Distribution | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 24 V supply rails in junction boxes and body control modules from alternator load dump and inductive switching spikes. IC Role / Device Role / Timing Role: Voltage-clamping TVS placed between power rail and chassis ground to limit transient overvoltage to ≤42.1 V. Use Value: Prevents latch-up or permanent damage to downstream PMICs and microcontrollers during ISO 16750-2 compliant 120 V/100 ms transients. |
Use Scenario: Safeguarding analog outputs of pressure/temperature sensors connected to PLC I/O modules in factory automation. IC Role / Device Role / Timing Role: Bidirectional clamping element across sensor output and reference ground to absorb ESD and cable discharge events. Use Value: Maintains signal integrity below ±1 kV contact ESD (IEC 61000-4-2) while preserving <1 nA leakage at 26 V operating voltage. |
| Telecom Line Card Surge Protection | Consumer Appliance Motor Drive Inputs |
Use Scenario: Shielding Ethernet PHY power pins and auxiliary DC feeds in outdoor telecom base station line cards exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Primary transient shunt on 3.3 V/5 V bias rails feeding PHY ICs and clock buffers. Use Value: Clamps 10/1000 μs 1 kA surge to ≤42.1 V within <1 ns, preventing data corruption and PHY reset during field deployment. |
Use Scenario: Guarding half-bridge gate driver inputs in smart appliance motor inverters against cross-conduction transients and back-EMF coupling. IC Role / Device Role / Timing Role: Fast-response clamp on isolated gate drive supply lines referenced to high-side switch node. Use Value: Limits voltage overshoot to <45 V during 71.3 A surge, avoiding unintended IGBT turn-on and shoot-through failure modes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMC3K26CAHM3_A/57 | Same electrical specs and AEC-Q101 qualification; updated revision with enhanced surge life testing per latest Vishay internal standards | Identical use cases; approved for new designs where long-term supply continuity is prioritized | Select when sourcing from post-2022 production lots requiring extended reliability validation |
| SMAJ26A-HF | Lower peak power (400 W), SMA package (smaller thermal mass), unidirectional only, no AEC-Q101 qualification | Limited to non-automotive consumer or low-energy industrial signal lines; unsuitable for load-dump or automotive under-hood use | Choose only for cost-sensitive, space-constrained, non-automotive applications with sub-500 W surge exposure |
Compared with SMC3K26CAHM3/57, the SMC3K26CAHM3_A/57 offers identical performance with improved long-term surge endurance, while SMAJ26A-HF trades robustness for size and cost - making it viable only where 3000 W clamping capability and automotive qualification are not required.
Availability
SMC3K26CAHM3/57 is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interface protection, telecom line card surge protection, and consumer appliance motor drive inputs requiring stable component supply and long-term lifecycle support.
Supply support for SMC3K26CAHM3/57 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 high-reliability and automotive-grade components.
The SMC3KxxCA series targets high-power transient suppression in harsh environments, engineered specifically for AEC-Q101-compliant automotive and industrial systems demanding 3000 W surge resilience and 150 °C operation.
FAQ
What is the polarity configuration of SMC3K26CAHM3/57?
SMC3K26CAHM3/57 is a bidirectional TVS diode with no polarity marking on the case. Both terminals behave identically under reverse or forward surge conditions, enabling flexible PCB placement across differential lines or symmetric power-ground paths without orientation constraints. This configuration is confirmed in the Vishay datasheet Document Number 89433, Section "MECHANICAL DATA" and "PRIMARY CHARACTERISTICS".
Is SMC3K26CAHM3/57 suitable for automotive under-hood applications?
Yes, SMC3K26CAHM3/57 is AEC-Q101 qualified and rated for −55 °C to +150 °C junction temperature, making it suitable for under-hood automotive environments. Its 3000 W peak pulse power rating handles ISO 7637-2 Pulse 5a/b load-dump events, and its UL 497B recognition (file E136766) confirms compliance with automotive safety standards. These attributes are explicitly stated in the Vishay datasheet revision 13-Sep-2022.
What does the "HM3" suffix indicate in SMC3K26CAHM3/57?
The "HM3" suffix in SMC3K26CAHM3/57 denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification and matte tin-plated leads meeting JESD 201 class 2 whisker resistance. It distinguishes this grade from the commercial "M3" variant and confirms suitability for automotive production. This designation is defined in the "MECHANICAL DATA" section of Vishay Document Number 89433.
Can SMC3K26CAHM3/57 be used in place of SMC3K26CA-M3/57?
No - SMC3K26CAHM3/57 and SMC3K26CA-M3/57 are not interchangeable without design review. While both share identical electrical parameters, only SMC3K26CAHM3/57 is AEC-Q101 qualified and intended for automotive applications. The "M3" version lacks automotive qualification and may not meet required reliability or traceability standards. This distinction is clearly documented in Vishay's ordering information table and qualification notes.
What is the maximum clamping voltage of SMC3K26CAHM3/57 at rated surge current?
The maximum clamping voltage of SMC3K26CAHM3/57 is 42.1 V at 71.3 A peak pulse current (IPPM) under the standard 10/1000 μs waveform. This value ensures downstream 24 V system components remain within safe operating voltage margins during transient events. It is specified in the "ELECTRICAL CHARACTERISTICS" table of Vishay Document Number 89433, row for SMC3K26CA.
SMC3K26CAHM3/57 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):
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
SMC3K26CAHM3/57 FAQ
1.How can I place an order for SMC3K26CAHM3/57 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMC3K26CAHM3/57 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 SMC3K26CAHM3/57 reliable?
The price and inventory of SMC3K26CAHM3/57 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMC3K26CAHM3/57 is usually 5 days.
3.What payment methods are accepted for SMC3K26CAHM3/57?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMC3K26CAHM3/57 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMC3K26CAHM3/57?
SMC3K26CAHM3/57 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMC3K26CAHM3/57 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 SMC3K26CAHM3/57?
For technical support, including SMC3K26CAHM3/57 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMC3K26CAHM3/57 requirements.
6.How does Aetrix verify that SMC3K26CAHM3/57 is sourced from the original manufacturer or authorized distributors?
All SMC3K26CAHM3/57 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 SMC3K26CAHM3/57 meets industry standards.
7.What is the process for return or replacement of SMC3K26CAHM3/57?
All SMC3K26CAHM3/57 units undergo pre-shipment inspection (PSI). If there is an issue with SMC3K26CAHM3/57, 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 SMC3K26CAHM3/57 part is unused and in its original packaging.
Return procedure for SMC3K26CAHM3/57:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMC3K26CAHM3/57 Tags
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