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Vishay General Semiconductor - Diodes Division SMC3K26CAHM3/9A
- Part No.:
- SMC3K26CAHM3/9A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMC3K26CAHM3/9A.pdf
- Description:
- TVS DIODE 26VWM 42.1VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,882
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Product details
Overview
SMC3K26CAHM3/9A from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, rated for 3000 W peak pulse power (10/1000 μs), 26 V standoff voltage (VWM), 28.9–31.9 V breakdown voltage (VBR), and 42.1 V clamping voltage (VC) at 71.3 A surge current. It is AEC-Q101 qualified and used to protect MOSFETs, ICs, and sensor signal lines against inductive switching transients and lightning surges in automotive and industrial systems.
For engineers reviewing the SMC3K26CAHM3/9A datasheet, SMC3K26CAHM3/9A pinout, SMC3K26CAHM3/9A application, or SMC3K26CAHM3/9A equivalent, key selection criteria include bidirectional polarity, 150 °C max junction temperature, halogen-free RoHS-compliant HM3 suffix construction, and compatibility with wave-soldering restrictions on PCB bottom side mounting.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector, responding within picoseconds to transient overvoltages exceeding its VWM threshold. Its low incremental surge resistance ensures stable clamping performance under high-current 10/1000 μs pulses, while meeting J-STD-020 MSL Level 1 moisture sensitivity and JESD 201 Class 2 whisker resistance requirements.
The SMC3K26CAHM3/9A is designed for unidirectional board-side placement with no polarity marking, leveraging silicon avalanche structure for repeatable breakdown behavior. Its thermal design supports continuous operation up to TJ = 150 °C, with derating applied above TA = 25 °C per Fig. 2 in the datasheet.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26 V - Maximum reverse working voltage before clamping begins; defines safe operating margin below breakdown. |
| VBR (min/max) | 28.9 V / 31.9 V - Breakdown voltage range at 1 mA test current; ensures consistent turn-on across production lots. |
| VC @ IPPM | 42.1 V - Clamping voltage at 71.3 A peak pulse current; limits downstream voltage stress during surge events. |
| PPPM | 3000 W - Peak pulse power handling with 10/1000 μs waveform; determines survivability under standardized surge tests. |
| IPPM | 71.3 A - Maximum non-repetitive surge current supported; sets minimum trace width and layout clearance requirements. |
| TJ max | 150 °C - Maximum junction temperature; constrains thermal design of PCB copper area and ambient operating conditions. |
| Polarity | Bidirectional - Symmetric clamping for AC-coupled or floating signal lines without polarity dependency. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, molded plastic case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Dimensions: 7.11 mm × 6.22 mm × 2.62 mm (L × W × H); recommended copper pad area: 8.0 mm × 8.0 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (marked end) | Anode/Cathode terminal pair | Non-polarized device - both terminals function identically; no marking on bidirectional types per datasheet note. |
| Anode (unmarked end) | Anode/Cathode terminal pair | Electrically symmetric; either terminal may connect to protected line or ground depending on layout constraints. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock testing. |
| MSL Level 1 rating | Zero floor life limitation - can be stored indefinitely at ≤30 °C/85 % RH without baking prior to reflow. |
| Halogen-free & RoHS-compliant (HM3) | Meets EU RoHS Directive 2011/65/EU and JEDEC JS709E halogen content limits (<900 ppm Br, <900 ppm Cl). |
| UL 497B recognition | Approved for primary circuit protection in telecom and industrial equipment with file E136766. |
| Low incremental surge resistance | Enables tighter clamping window (VC – VBR) and reduced energy dissipation during transient events. |
Applications
| Automotive Powertrain ECUs | Industrial Motor Drive Inputs |
|---|---|
Use Scenario: Protection of 12 V CAN bus transceivers and microcontroller I/O pins against load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Shunt-type transient suppressor placed between signal line and chassis ground to clamp voltage spikes before reaching sensitive logic. Use Value: Maintains signal integrity under ISO 7637-2 Pulse 5a (load dump) with VC = 42.1 V limiting stress on 5 V tolerant receivers. | Use Scenario: Safeguarding analog input channels of PLC analog modules connected to 4–20 mA current loops exposed to relay coil flyback. IC Role / Device Role / Timing Role: Bidirectional clamping element across differential sensor inputs to suppress ±1 kV EFT bursts per IEC 61000-4-4. Use Value: Prevents latch-up in op-amps by limiting common-mode voltage excursion to ≤42.1 V during 71.3 A surge events. |
| Consumer Appliance Control Boards | Telecom Line Interface Circuits |
Use Scenario: Shielding microcontroller reset lines and button debounce circuits from ESD and relay contact bounce in washing machine control boards. IC Role / Device Role / Timing Role: Low-capacitance TVS placed directly at connector entry point to divert fast transients before PCB routing. Use Value: Delivers sub-nanosecond response with 2.0 μA leakage at 26 V, minimizing standby power impact on battery-backed systems. | Use Scenario: Protecting Ethernet PHY interface transformers and PoE detection circuitry from lightning-induced surges on RJ45 ports. IC Role / Device Role / Timing Role: Primary-level surge suppression on secondary side of isolation transformer, coordinated with gas discharge tube (GDT) upstream. Use Value: Handles 3000 W peak pulse without degradation, enabling compliance with ITU-T K.21 basic protection level for outdoor telecom equipment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMC3K26CAHM3_A/9A | Same electrical specs; updated revision with enhanced process control and tighter VBR tolerance (±5 % vs. ±10 % in legacy version). | Identical footprint and thermal profile; suitable for new designs requiring latest qualification data. | Select when long-term supply continuity and latest AEC-Q101 test reports are required. |
| SMAJ26A | Lower PPPM (400 W), smaller SMA package (DO-214AC), VC = 42.1 V same but IPPM = 9.5 A only. | Limited to low-energy transients; insufficient for ISO 7637-2 Pulse 5a or IEC 61000-4-5 Level 3. | Use only in space-constrained consumer applications where surge threat level is classified as low. |
Compared with SMC3K26CAHM3/9A, the SMC3K26CAHM3_A/9A offers improved parametric consistency for automotive qualification audits, while SMAJ26A trades robustness for size - making the original part optimal for high-reliability industrial and automotive surge protection where 3000 W capability and AEC-Q101 validation are mandatory.
Availability
SMC3K26CAHM3/9A is available at Aetrix Electronics and suitable for automotive powertrain ECUs, industrial motor drive inputs, and telecom line interface circuits requiring stable component supply, full traceability, and AEC-Q101 compliance.
Supply support for SMC3K26CAHM3/9A 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, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The SMC3KxxCA series was developed to meet stringent automotive and industrial surge immunity standards, delivering high-power transient suppression in ruggedized surface-mount packages for harsh-environment electronics.
FAQ
What does the "HM3" suffix mean in SMC3K26CAHM3/9A?
The HM3 suffix in SMC3K26CAHM3/9A indicates halogen-free, RoHS-compliant construction with AEC-Q101 qualification. It confirms compliance with JESD 201 Class 2 whisker resistance, UL 497B safety recognition (file E136766), and MSL Level 1 moisture sensitivity - distinguishing it from commercial-grade M3 variants.
Is SMC3K26CAHM3/9A suitable for protecting CAN FD interfaces?
Yes, SMC3K26CAHM3/9A is suitable for CAN FD interface protection due to its 26 V VWM, 42.1 V VC, and fast response time. Its clamping voltage stays well below typical CAN transceiver absolute maximum ratings (e.g., 40–58 V), and its bidirectional nature matches differential bus requirements - provided layout minimizes parasitic inductance.
Does SMC3K26CAHM3/9A have polarity markings on the package?
No, SMC3K26CAHM3/9A has no polarity markings because it is a bidirectional TVS diode. The datasheet explicitly states "no marking on bidirectional types." Both terminals are functionally identical, allowing flexible PCB placement without orientation constraints.
What is the maximum allowable PCB temperature during reflow for SMC3K26CAHM3/9A?
The maximum peak reflow temperature for SMC3K26CAHM3/9A is 260 °C, per J-STD-020 MSL Level 1. The device supports lead-free reflow profiles with ramp rates and dwell times compliant with IPC/JEDEC J-STD-020, and requires no pre-baking due to unlimited floor life.
How does SMC3K26CAHM3/9A compare to SMC3K26CA-M3/9A in terms of reliability?
SMC3K26CAHM3/9A provides higher reliability than SMC3K26CA-M3/9A due to AEC-Q101 qualification, which includes extended temperature cycling, highly accelerated life testing (HALT), and failure analysis not required for commercial M3 variants. The HM3 version also meets stricter whisker resistance (JESD 201 Class 2) and safety certification (UL 497B).
SMC3K26CAHM3/9A 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):
- 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)
SMC3K26CAHM3/9A FAQ
1.How can I place an order for SMC3K26CAHM3/9A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMC3K26CAHM3/9A 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 SMC3K26CAHM3/9A reliable?
The price and inventory of SMC3K26CAHM3/9A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMC3K26CAHM3/9A is usually 5 days.
3.What payment methods are accepted for SMC3K26CAHM3/9A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMC3K26CAHM3/9A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMC3K26CAHM3/9A?
SMC3K26CAHM3/9A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMC3K26CAHM3/9A 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 SMC3K26CAHM3/9A?
For technical support, including SMC3K26CAHM3/9A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMC3K26CAHM3/9A requirements.
6.How does Aetrix verify that SMC3K26CAHM3/9A is sourced from the original manufacturer or authorized distributors?
All SMC3K26CAHM3/9A 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 SMC3K26CAHM3/9A meets industry standards.
7.What is the process for return or replacement of SMC3K26CAHM3/9A?
All SMC3K26CAHM3/9A units undergo pre-shipment inspection (PSI). If there is an issue with SMC3K26CAHM3/9A, 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 SMC3K26CAHM3/9A part is unused and in its original packaging.
Return procedure for SMC3K26CAHM3/9A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMC3K26CAHM3/9A Tags
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