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Vishay General Semiconductor - Diodes Division SMC3K36CA-M3/9A
- Part No.:
- SMC3K36CA-M3/9A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMC3K36CA-M3/9A.pdf
- Description:
- TVS DIODE 36VWM 58.1VC DO214AB
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMC3K36CA-M3/9A from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) in the SMC (DO-214AB) package, designed for high-energy surge protection. It features a 3000 W peak pulse power rating (10/1000 μs), 36 V stand-off voltage (VWM), 40.0–44.2 V breakdown voltage (VBR), and clamps to ≤58.1 V at 51.6 A peak pulse current - deployed on power rails and signal lines of automotive ECUs and industrial sensor interfaces.
For engineers reviewing the SMC3K36CA-M3/9A datasheet, SMC3K36CA-M3/9A pinout, SMC3K36CA-M3/9A application, or SMC3K36CA-M3/9A equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, MSL Level 1 moisture sensitivity, halogen-free RoHS-compliant construction, and compatibility with wave-soldering process constraints excluding bottom-side mounting.
Technical Context
This TVS diode operates as a voltage-clamping device triggered by transient overvoltage events, leveraging avalanche breakdown behavior to shunt surge current away from protected circuitry. Its bidirectional polarity supports AC-coupled or floating signal paths, and its low incremental surge resistance ensures minimal voltage overshoot during fast transients.
The device is rated for junction temperatures from –55 °C to +150 °C and meets UL 497B safety recognition (E136766). It is qualified per AEC-Q101 for automotive under-hood applications and conforms to J-STD-020 MSL Level 1, permitting reflow up to 260 °C peak without preconditioning.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 36 V - maximum continuous reverse operating voltage before clamping begins; defines safe DC/AC working range. |
| VBR min/max | 40.0 V / 44.2 V at 1.0 mA test current - specifies guaranteed avalanche onset window for design margining. |
| VC @ IPPM | ≤58.1 V at 51.6 A - clamped voltage during full 3000 W surge; determines maximum stress on downstream ICs. |
| PPPM | 3000 W (10/1000 μs waveform) - peak surge energy handling capacity; validates robustness against IEC 61000-4-5 Level 4 surges. |
| TJ max | +150 °C - maximum junction temperature; enables operation in under-hood automotive environments. |
| Polarity | Bidirectional - protects both positive and negative transients without polarity-sensitive placement. |
| Package | SMC (DO-214AB) - standardized surface-mount outline with 8.0 mm × 8.0 mm copper pad area for thermal dissipation. |
Pinout & Package
SMC3K36CA-M3/9A uses the SMC (DO-214AB) package: a two-terminal, symmetrical surface-mount case with cathode band omitted for bidirectional types. Terminals are matte tin-plated leads, solderable per J-STD-002 and JESD 22-B102, and meet JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient current path | No polarity marking; either terminal serves as input/output for bidirectional clamping - simplifies PCB layout and eliminates orientation errors. |
| Cathode Band (absent) | N/A | Intentionally omitted per bidirectional design; confirms no unidirectional conduction path exists - critical for AC line or differential signal protection. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - required for engine control, ADAS, and body electronics. |
| MSL Level 1 rating | Zero floor life limitation; supports standard reflow without baking - reduces manufacturing overhead and avoids moisture-related popcorning. |
| UL 497B recognition (E136766) | Meets safety standards for telecom and industrial surge protection circuits - enables compliance in end-equipment safety certifications. |
| Halogen-free & RoHS-compliant (M3 suffix) | Complies with environmental regulations and lead-free assembly requirements - supports global market access and green manufacturing programs. |
| Low incremental surge resistance | Minimizes clamping voltage overshoot during fast-rising transients - improves protection margin for sensitive 3.3 V or 5 V logic interfaces. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
|
Use Scenario: Protecting 12 V battery-fed microcontroller power inputs in engine control units exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Primary clamping element absorbing >3000 W surges while limiting rail voltage to ≤58.1 V for <100 ms. Use Value: Prevents latch-up or permanent damage to MCU VDD pins during alternator load dump events per ISO 16750-2. |
Use Scenario: Shielding analog output lines (e.g., 4–20 mA current loop) of pressure sensors in factory automation systems. IC Role / Device Role / Timing Role: Bidirectional transient shunt placed across signal and return lines to suppress EFT bursts and inductive switching noise. Use Value: Maintains signal integrity below ±5 mV error band during 4 kV EFT (IEC 61000-4-4) without requiring active circuitry or response timing. |
| Telecom Interface Surge Protection | Consumer Device USB Port Protection |
|
Use Scenario: Safeguarding Ethernet PHY interface transformers and magnetics in PoE-powered network switches. IC Role / Device Role / Timing Role: Secondary-level TVS placed after common-mode chokes to clamp differential and common-mode surges. Use Value: Withstands combined lightning-induced surges up to 10/1000 μs waveform without degradation - extends field lifetime beyond 10 years. |
Use Scenario: Adding robustness to USB 2.0 data lines (D+/D−) in portable medical monitors subjected to ESD contact discharge. IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamp minimizing signal distortion while meeting IEC 61000-4-2 ±15 kV air/±8 kV contact. Use Value: Clamps ESD events within <1 ns, limiting voltage seen by USB transceiver to <58.1 V - prevents bit errors and port lockup. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMC3K36CAHM3/9A | AEC-Q101 qualified; identical electrical specs but enhanced reliability screening for automotive use. | Required for new automotive designs; not necessary for commercial/industrial applications where cost optimization is prioritized. | Select SMC3K36CAHM3/9A when AEC-Q101 compliance is mandated; otherwise SMC3K36CA-M3/9A satisfies general-purpose surge needs. |
| SMC3K33CA-M3/9A | Lower VWM (33 V) and VBR (36.7–40.6 V); same PPPM and package. | Suitable where system nominal voltage is ≤30 V and tighter clamping margin is needed before overvoltage threshold. | Choose SMC3K33CA-M3/9A if protecting 3.3 V or 5 V logic rails with lower tolerance; SMC3K36CA-M3/9A better matches 36 V nominal systems. |
Compared with SMC3K36CAHM3/9A, the SMC3K36CA-M3/9A offers identical surge performance at lower qualification cost, while SMC3K33CA-M3/9A provides a 3 V lower stand-off voltage for tighter voltage-margin designs - enabling precise selection based on system voltage architecture and qualification requirements.
Availability
SMC3K36CA-M3/9A is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, and telecom surge suppression requiring stable component supply and long-term manufacturability.
Supply support for SMC3K36CA-M3/9A 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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMC3KxxCA series was developed to deliver high-power transient suppression in compact surface-mount packages for automotive, industrial, and telecom infrastructure - balancing clamping precision, surge endurance, and process compatibility.
FAQ
What is the maximum clamping voltage of the SMC3K36CA-M3/9A during a 3000 W surge event?
The SMC3K36CA-M3/9A clamps to a maximum of 58.1 V when subjected to its rated 51.6 A peak pulse current (10/1000 μs waveform). This value is measured under standardized test conditions per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during worst-case surge events. The SMC3K36CA-M3/9A maintains this clamping performance across its full operating temperature range.
Is the SMC3K36CA-M3/9A suitable for automotive applications?
The SMC3K36CA-M3/9A is not AEC-Q101 qualified, though it shares identical electrical specifications with the AEC-Q101–rated SMC3K36CAHM3/9A variant. It is suitable for non-safety-critical automotive subsystems where qualification is not mandated, such as infotainment power supplies or cabin sensors. For engine bay or ADAS applications, the SMC3K36CAHM3/9A is the recommended version. The SMC3K36CA-M3/9A remains fully compatible in footprint and function.
What does the "M3" suffix indicate in SMC3K36CA-M3/9A?
The "M3" suffix in SMC3K36CA-M3/9A denotes halogen-free, RoHS-compliant construction with matte tin-plated leads that pass JESD 201 Class 2 whisker testing. It also indicates commercial-grade qualification (non-AEC-Q101), distinguishing it from the "HM3" suffix used for AEC-Q101–qualified versions. The SMC3K36CA-M3/9A is intended for industrial and consumer applications where environmental compliance and solderability are required but automotive qualification is not.
Can the SMC3K36CA-M3/9A be mounted using wave soldering?
The SMC3K36CA-M3/9A is not recommended for PCB bottom-side wave mounting due to thermal stress limitations identified in Vishay's packaging guidelines. It supports standard reflow soldering per J-STD-020 MSL Level 1 (peak 260 °C), but wave soldering should only be applied to the top side with controlled dwell time and preheat profile. The SMC3K36CA-M3/9A's thermal mass and package geometry require careful process validation to avoid delamination or solder joint voiding.
What is the standoff voltage (VWM) and why is it critical for SMC3K36CA-M3/9A selection?
The SMC3K36CA-M3/9A has a 36 V standoff voltage (VWM), meaning it remains non-conductive up to this DC or RMS voltage level. Selecting a VWM ≥10–20 % above the system's maximum normal operating voltage prevents leakage or premature conduction. For a 30 V nominal automotive rail, the SMC3K36CA-M3/9A provides appropriate margin; choosing a lower VWM (e.g., SMC3K33CA-M3/9A) risks false triggering, while higher values reduce clamping effectiveness. The SMC3K36CA-M3/9A balances margin and protection responsiveness.
SMC3K36CA-M3/9A 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):
- 36V
- Voltage - Breakdown (Min):
- 40V
- Voltage - Clamping (Max) @ Ipp:
- 58.1V
- Current - Peak Pulse (10/1000µs):
- 51.6A
- Power - Peak Pulse:
- 3000W (3kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
SMC3K36CA-M3/9A FAQ
1.How can I place an order for SMC3K36CA-M3/9A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMC3K36CA-M3/9A 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 SMC3K36CA-M3/9A reliable?
The price and inventory of SMC3K36CA-M3/9A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMC3K36CA-M3/9A is usually 5 days.
3.What payment methods are accepted for SMC3K36CA-M3/9A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMC3K36CA-M3/9A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMC3K36CA-M3/9A?
SMC3K36CA-M3/9A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMC3K36CA-M3/9A 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 SMC3K36CA-M3/9A?
For technical support, including SMC3K36CA-M3/9A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMC3K36CA-M3/9A requirements.
6.How does Aetrix verify that SMC3K36CA-M3/9A is sourced from the original manufacturer or authorized distributors?
All SMC3K36CA-M3/9A 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 SMC3K36CA-M3/9A meets industry standards.
7.What is the process for return or replacement of SMC3K36CA-M3/9A?
All SMC3K36CA-M3/9A units undergo pre-shipment inspection (PSI). If there is an issue with SMC3K36CA-M3/9A, 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 SMC3K36CA-M3/9A part is unused and in its original packaging.
Return procedure for SMC3K36CA-M3/9A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMC3K36CA-M3/9A Tags
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Diodes Incorporated
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Diodes Incorporated
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