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Vishay General Semiconductor - Diodes Division SMC3K48CA-M3/9A
- Part No.:
- SMC3K48CA-M3/9A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMC3K48CA-M3/9A.pdf
- Description:
- TVS DIODE 48VWM 77.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,640
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Product details
Overview
SMC3K48CA-M3/9A from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) in the SMC (DO-214AB) package, rated for 3000 W peak pulse power (10/1000 μs), with a standoff voltage of 48 V, breakdown voltage range 53.3–58.9 V, and clamping voltage of 77.4 V at 38.8 A peak pulse current. It is AEC-Q101 qualified and used to protect MOSFETs, ICs, and sensor signal lines against inductive switching transients in automotive and industrial systems.
For engineers reviewing the SMC3K48CA-M3/9A datasheet, SMC3K48CA-M3/9A pinout, SMC3K48CA-M3/9A application, or SMC3K48CA-M3/9A equivalent, key selection criteria include bidirectional polarity, 48 V VWM, 77.4 V VC at IPPM, AEC-Q101 qualification, and SMC package compatibility with high-surge PCB layouts requiring UL 497B recognition and J-STD-020 MSL Level 1 compliance.
Technical Context
This TVS diode operates as a clamping device that activates when reverse voltage exceeds its breakdown threshold (53.3–58.9 V), limiting transient energy by diverting surge current away from protected circuitry. Its low incremental surge resistance and fast response time ensure effective suppression of inductive kick and lightning-induced surges.
Designed for unidirectional board-side mounting only, it is not recommended for bottom-side wave soldering. The device sustains operation from –55 °C to +150 °C junction temperature and meets UL 497B safety certification (E136766) and RoHS/halogen-free requirements per M3 suffix.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 48 V - Maximum continuous reverse operating voltage before clamping begins; defines safe working margin for 48 V nominal systems. |
| VBR min/max | 53.3 V / 58.9 V - Breakdown occurs within this range at 1 mA test current; ensures predictable turn-on across manufacturing lot and temperature. |
| VC @ IPPM | 77.4 V - Clamped voltage at 38.8 A peak pulse current; determines maximum stress imposed on downstream components during surge events. |
| PPPM | 3000 W - Peak pulse power handling capability with 10/1000 μs waveform; supports robust protection in high-energy automotive load-dump scenarios. |
| Polarity | Bidirectional - Symmetric clamping for AC-coupled or floating signal lines; no polarity marking required on device body. |
| Package | SMC (DO-214AB) - Standardized 8.0 mm × 8.0 mm copper pad footprint; enables automated placement and reflow compatibility per J-STD-020 MSL Level 1. |
| TJ max | +150 °C - Maximum junction temperature rating; allows reliable operation in under-hood automotive environments and industrial enclosures. |
Pinout & Package
SMC3K48CA-M3/9A uses the standard SMC (DO-214AB) surface-mount package with two terminals: Cathode and Anode. No polarity marking is present on bidirectional variants; orientation is determined by PCB layout symmetry.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient return path | Connected to system ground or low-impedance reference plane; completes clamping loop during overvoltage events. |
| Cathode | Transient input node | Connected to protected line (e.g., CAN_H, LIN, sensor supply); conducts surge current into anode when voltage exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and surge endurance-enables use in engine control, body electronics, and ADAS modules. |
| UL 497B recognition (E136766) | Confirms compliance with telecom and industrial surge protection safety standards; eliminates need for additional external certification in end equipment. |
| MSL Level 1 (J-STD-020) | Zero floor life limitation; supports unlimited storage and standard reflow without baking-reduces manufacturing overhead and risk of moisture-related defects. |
| Halogen-free & RoHS-compliant (M3) | Meets global environmental regulations and IPC-J-STD-020 whisker resistance Class 2; suitable for consumer, medical, and export-sensitive applications. |
Applications
| Automotive Power Line Protection | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Protecting 48 V battery rail inputs in ADAS camera modules from load dump and jump-start transients. IC Role / Device Role: Bidirectional clamping TVS placed between power input and ground, upstream of DC/DC converter. Use Value: Limits transient voltage to ≤77.4 V at 38.8 A, preventing damage to 65 V-rated buck controllers and image sensors. |
Use Scenario: Shielding analog output lines (e.g., 4–20 mA current loop) of pressure sensors in factory automation PLCs. IC Role / Device Role: Low-capacitance TVS connected across signal and return, referenced to local ground plane. Use Value: Maintains signal integrity with <100 pF junction capacitance while suppressing ESD and switching noise up to 3000 W. |
| Telecom Interface Surge Protection | Consumer Device USB Port Clamping |
Use Scenario: Safeguarding RS-485 transceivers in base station backhaul units exposed to lightning-induced surges on long cable runs. IC Role / Device Role: Bidirectional TVS mounted differential across A/B lines, with common-mode grounding via chassis. Use Value: Delivers symmetrical clamping (±77.4 V) without distorting differential signaling, meeting IEC 61000-4-5 Level 4 requirements. |
Use Scenario: Adding secondary-level surge immunity to USB Type-C power delivery paths in smart home hubs. IC Role / Device Role: Standoff-rated TVS on VBUS line, coordinated with primary fuse and polymer PTC. Use Value: Withstands repeated 3000 W pulses without degradation, extending field life beyond 10,000 surge events per JEDEC JESD22-A114. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMC3K48CAHM3/9A | AEC-Q101 qualified version with identical electrical specs; HM3 suffix denotes automotive qualification and same M3 halogen-free construction. | Required for new automotive designs where AEC-Q101 compliance must be documented at part level-not just family level. | Select SMC3K48CAHM3/9A when automotive PPAP submission or OEM audit requires explicit part-level qualification evidence. |
| SMC3K45CA-M3/9A | Lower VWM (45 V) and VBR (50.0–55.3 V); clamps at 72.7 V with higher IPPM (41.3 A) for same PPPM. | Better suited for 42–45 V nominal systems (e.g., 36 V battery platforms) where tighter voltage margin is needed before clamping. | Choose SMC3K45CA-M3/9A when protecting circuits with lower absolute maximum ratings than those tolerating 77.4 V clamping. |
Compared with SMC3K48CA-M3/9A, SMC3K48CAHM3/9A adds mandatory automotive traceability without electrical change, while SMC3K45CA-M3/9A shifts clamping behavior downward for tighter voltage margins-neither is pin-compatible but both share identical SMC footprint and thermal profile.
Availability
SMC3K48CA-M3/9A is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interfaces, telecom infrastructure, and consumer USB power protection requiring stable component supply and full traceability.
Supply support for SMC3K48CA-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 is designed for high-energy transient suppression in harsh environments-targeting automotive, industrial, and telecom applications where 3000 W surge handling and AEC-Q101 compliance are critical design requirements.
FAQ
What is the clamping voltage of SMC3K48CA-M3/9A at its rated peak pulse current?
The SMC3K48CA-M3/9A has a maximum clamping voltage (VC) of 77.4 V when subjected to its peak pulse current (IPPM) of 38.8 A using the standardized 10/1000 μs waveform. This value is measured at TA = 25 °C and defines the upper voltage limit imposed on protected circuitry during surge events. The SMC3K48CA-M3/9A maintains this clamping performance across its specified junction temperature range.
Is SMC3K48CA-M3/9A suitable for automotive applications?
Yes, SMC3K48CA-M3/9A is AEC-Q101 qualified and UL 497B recognized (file E136766), making it suitable for automotive applications such as body control modules, infotainment power supplies, and ADAS sensor interfaces. While the M3 suffix indicates commercial-grade qualification, the underlying die and construction meet AEC-Q101 stress test requirements. For full automotive documentation, SMC3K48CAHM3/9A is the explicitly qualified variant.
What does the "-M3/9A" suffix mean in SMC3K48CA-M3/9A?
The "-M3" suffix denotes halogen-free, RoHS-compliant construction meeting JESD201 Class 2 whisker resistance, while "/9A" specifies packaging in 13-inch diameter plastic tape and reel containing 3500 units. This format aligns with Vishay's ordering convention for SMC-packaged devices and ensures compatibility with standard SMT pick-and-place equipment and reflow profiles.
Can SMC3K48CA-M3/9A replace SMC3K45CA-M3/9A in an existing design?
SMC3K48CA-M3/9A is not a direct replacement for SMC3K45CA-M3/9A due to differences in standoff voltage (48 V vs. 45 V) and clamping behavior (77.4 V vs. 72.7 V). Substitution requires verification that downstream components tolerate the higher clamping voltage and that system-level surge testing remains compliant. The SMC3K48CA-M3/9A should only be used where 48 V nominal operation and 77.4 V clamping margin are acceptable.
Does SMC3K48CA-M3/9A have polarity markings on the device body?
No, SMC3K48CA-M3/9A does not feature polarity markings because it is a bidirectional TVS diode. The device functions identically regardless of orientation across the protected line and ground. Layout must follow symmetric SMC (DO-214AB) pad geometry, and no anode/cathode alignment is required during placement. Polarity identification is unnecessary for functional correctness.
SMC3K48CA-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):
- 48V
- Voltage - Breakdown (Min):
- 53.3V
- Voltage - Clamping (Max) @ Ipp:
- 77.4V
- Current - Peak Pulse (10/1000µs):
- 38.8A
- 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)
SMC3K48CA-M3/9A FAQ
1.How can I place an order for SMC3K48CA-M3/9A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMC3K48CA-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 SMC3K48CA-M3/9A reliable?
The price and inventory of SMC3K48CA-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 SMC3K48CA-M3/9A is usually 5 days.
3.What payment methods are accepted for SMC3K48CA-M3/9A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMC3K48CA-M3/9A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMC3K48CA-M3/9A?
SMC3K48CA-M3/9A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMC3K48CA-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 SMC3K48CA-M3/9A?
For technical support, including SMC3K48CA-M3/9A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMC3K48CA-M3/9A requirements.
6.How does Aetrix verify that SMC3K48CA-M3/9A is sourced from the original manufacturer or authorized distributors?
All SMC3K48CA-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 SMC3K48CA-M3/9A meets industry standards.
7.What is the process for return or replacement of SMC3K48CA-M3/9A?
All SMC3K48CA-M3/9A units undergo pre-shipment inspection (PSI). If there is an issue with SMC3K48CA-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 SMC3K48CA-M3/9A part is unused and in its original packaging.
Return procedure for SMC3K48CA-M3/9A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMC3K48CA-M3/9A Tags
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DESD3V3E1BL-7B
Diodes Incorporated
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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