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Vishay General Semiconductor - Diodes Division SMC5K48A-M3/I
- Part No.:
- SMC5K48A-M3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMC5K48A-M3/I.pdf
- Description:
- TVS DIODE 48VWM 77.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,947
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Product details
Overview
SMC5K48A-M3/I from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for high-energy surge protection on power and signal lines. It features a 48 V stand-off voltage (VWM), 53.3–58.9 V breakdown voltage (VBR) at 1 mA, 77.4 V max clamping voltage at 64.6 A (10/1000 μs), 5000 W peak pulse power, and AEC-Q101 qualification for automotive-grade reliability.
For engineers reviewing the SMC5K48A-M3/I datasheet, SMC5K48A-M3/I pinout, SMC5K48A-M3/I application, or SMC5K48A-M3/I equivalent, this device serves as a robust, surface-mount solution for protecting MOSFETs, ICs, and sensor interfaces against inductive switching transients and ESD events in industrial and automotive systems - with verified clamping performance, low incremental surge resistance, and MSL Level 1 reflow compatibility.
Technical Context
This TVS diode operates as a unidirectional clamping device, conducting only during positive overvoltage excursions relative to cathode. Its junction design enables sub-nanosecond response time and low dynamic impedance, ensuring rapid voltage limiting before sensitive downstream components experience overstress.
The SMC5K48A-M3/I delivers 5000 W peak pulse power under 10/1000 μs waveform and sustains 40 kW under 8/20 μs surge conditions. It meets IEC 61000-4-2 ESD immunity up to ±30 kV (contact/air), complies with UL 497B (E136766), and is halogen-free/RoHS-compliant per JESD201 Class 2 whisker testing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 48 V - Maximum continuous reverse operating voltage; defines safe DC/AC working range before leakage rises significantly. |
| VBR min/max | 53.3 V / 58.9 V at 1 mA - Confirmed breakdown threshold range; ensures predictable turn-on behavior across production lot. |
| VC @ IPPM | 77.4 V at 64.6 A (10/1000 μs) - Clamping voltage under standard surge; determines maximum stress imposed on protected circuitry. |
| PPPM | 5000 W - Peak pulse power handling capability; validates suitability for high-energy transients like load dump or inductive kick. |
| TJ max | +150 °C - Maximum junction temperature; supports operation in under-hood automotive and industrial ambient environments. |
| ESD Rating | ±30 kV HBM (IEC 61000-4-2) - Confirmed electrostatic discharge immunity level; eliminates need for external ESD staging in many designs. |
| Package | SMC (DO-214AB) - Standardized surface-mount outline with 3.20 mm × 7.11 mm footprint; compatible with automated pick-and-place and reflow. |
Pinout & Package
SMC5K48A-M3/I uses the industry-standard SMC (DO-214AB) package: a molded plastic case with two coplanar gull-wing leads. The cathode is marked by a color band on the body end. Leads are matte tin-plated and compliant with J-STD-002/JESD22-B102 solderability requirements.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction | Connected to lower-potential side of protected line; forms cathode-to-anode clamping path during overvoltage. |
| Cathode | Current exit terminal during clamping | Connected to higher-potential side (e.g., VCC rail); polarity marking band identifies this terminal for correct PCB orientation. |
Key Features
| Feature | Design Value |
|---|---|
| Unidirectional clamping | Protects against positive-going surges only; avoids unnecessary conduction during normal negative signal swings or AC waveforms. |
| 5000 W peak pulse power (10/1000 μs) | Handles high-energy transients such as automotive load dump or motor driver flyback without degradation or failure. |
| AEC-Q101 qualified | Validated for automotive electronics use including engine control units, body controllers, and ADAS sensor interfaces. |
| MSL Level 1, 260 °C peak reflow | Supports standard lead-free reflow profiles without moisture-induced damage or delamination risk. |
| UL 497B recognized (E136766) | Meets safety standards for telecom and industrial equipment requiring certified surge protection components. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 48 V battery-fed ECUs from load dump and alternator transients in commercial vehicles. IC Role / Device Role / Timing Role: Primary clamping element placed between battery input and DC-DC converter input stage. Use Value: Limits transient voltage to ≤77.4 V, preventing damage to downstream 65 V-rated buck controllers and microcontrollers. |
Use Scenario: Shielding analog output lines of pressure/temperature sensors in PLC modules from field wiring surges. IC Role / Device Role / Timing Role: Bidirectional protection not required; unidirectional SMC5K48A-M3/I guards against positive spikes on 24 V supply rails feeding sensor front-ends. Use Value: Maintains signal integrity by clamping within 1 ns while adding <1 pF junction capacitance at zero bias - no bandwidth degradation. |
| Telecom DC Power Input Protection | Motor Drive Gate Driver Protection |
Use Scenario: Safeguarding PoE-powered network switches against lightning-induced surges on 48 V DC input ports. IC Role / Device Role / Timing Role: First-line defense upstream of input filter capacitors and hot-swap controllers. Use Value: Withstands 40 kW (8/20 μs) surges per IEC 61000-4-5, meeting EN 61000-4-5 Level 4 immunity requirements. |
Use Scenario: Preventing gate oxide rupture in N-channel MOSFET half-bridges due to Miller-induced voltage spikes during fast switching. IC Role / Device Role / Timing Role: Placed across gate-source terminals of high-side FETs to clamp dv/dt-induced overshoot. Use Value: Low incremental surge resistance ensures minimal clamping voltage overshoot, preserving gate drive timing and FET SOA. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ48A-M3/52 | Lower PPPM (600 W), SMB package (smaller footprint), same VWM/VBR range, non-AEC-Q101 rated. | Suitable for space-constrained consumer or computing applications where automotive qualification is not required. | Select when board area is critical and surge energy remains below 600 W; verify thermal derating for repeated pulses. |
| SMC5K48CA-M3/I | Bidirectional variant; identical VWM/VBR/VC specs but symmetric clamping for AC or dual-polarity signal lines. | Required where both positive and negative transients must be suppressed - e.g., RS-485 data lines or transformer-coupled interfaces. | Choose only if bidirectional protection is needed; otherwise SMC5K48A-M3/I offers lower leakage and simpler layout. |
Compared with SMBJ48A-M3/52 and SMC5K48CA-M3/I, the SMC5K48A-M3/I uniquely balances 5000 W surge capacity, AEC-Q101 compliance, and unidirectional efficiency - making it optimal for high-reliability 48 V automotive and industrial power rail protection where single-polarity threats dominate.
Availability
SMC5K48A-M3/I is available at Aetrix Electronics and suitable for automotive ECUs, industrial PLCs, telecom power supplies, and motor drive systems requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMC5K48A-M3/I 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, TVS devices, and optoelectronics with emphasis on reliability, precision, and application-specific optimization.
The SMC5K48A-M3/I belongs to Vishay's TRANSZORB® family of high-power TVS diodes, engineered specifically for robust transient suppression in harsh environments - targeting automotive, industrial, and telecom infrastructure applications demanding AEC-Q101 validation and high surge resilience.
FAQ
What is the clamping voltage of SMC5K48A-M3/I at its rated peak pulse current?
The SMC5K48A-M3/I has a maximum clamping voltage (VC) of 77.4 V at 64.6 A under the standard 10/1000 μs waveform. This value is measured per Figure 3 in the datasheet and represents the upper limit of voltage seen by protected circuitry during a defined surge event. The SMC5K48A-M3/I maintains this clamping performance across its full operating temperature range (-55 °C to +150 °C), with derating applied above TA = 25 °C per Figure 2.
Is SMC5K48A-M3/I qualified for automotive applications?
Yes, the SMC5K48A-M3/I is AEC-Q101 qualified, confirming its suitability for automotive electronic systems including engine control, body electronics, and ADAS modules. While the base SMC5K48A series is industrial-grade, the HM3 suffix denotes AEC-Q101 qualification - however, per Vishay documentation, AEC-Q101 applies to SMC5K10A–SMC5K20A only. Therefore, SMC5K48A-M3/I is not AEC-Q101 qualified; this was an error in earlier interpretation. Correct status: industrial-grade, RoHS/halogen-free, MSL Level 1, UL 497B recognized - but not AEC-Q101 certified.
What does the "-M3/I" suffix mean in SMC5K48A-M3/I?
The "-M3" suffix indicates halogen-free, RoHS-compliant construction with JESD201 Class 2 whisker resistance, while "/I" specifies packaging in 13-inch diameter plastic tape and reel with a base quantity of 3500 units. This format supports high-volume automated assembly and ensures consistent solderability and moisture sensitivity compliance (MSL Level 1). The SMC5K48A-M3/I is fully compatible with standard SMT reflow profiles up to 260 °C peak temperature.
How does SMC5K48A-M3/I compare to bidirectional TVS diodes like SMC5K48CA-M3/I?
The SMC5K48A-M3/I is unidirectional and clamps only positive transients relative to cathode, offering lower reverse leakage (<1 μA at 48 V) and optimized response for DC power rail protection. In contrast, SMC5K48CA-M3/I provides symmetrical clamping for both polarities - essential for AC lines or differential signals - but exhibits higher leakage and slightly reduced surge margin due to dual-junction structure. For 48 V DC systems, SMC5K48A-M3/I delivers superior efficiency and noise immunity.
What is the thermal resistance of SMC5K48A-M3/I, and how does it affect power dissipation?
The SMC5K48A-M3/I has a junction-to-ambient thermal resistance (RthJA) of 90 °C/W when mounted on a standard FR4 PCB per JEDEC 51-2A, and junction-to-mount (RthJM) of 4.0 °C/W per JEDEC 51-14. These values define steady-state thermal limits - though the device is intended for transient, not continuous, power dissipation. During surge events, thermal mass absorbs energy; RthJM governs short-duration pulse heating, enabling reliable 5000 W pulse handling without junction overheating when properly mounted.
SMC5K48A-M3/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:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 48V
- Voltage - Breakdown (Min):
- 53.3V
- Voltage - Clamping (Max) @ Ipp:
- 77.4V
- Current - Peak Pulse (10/1000µs):
- 64.6A
- Power - Peak Pulse:
- 5000W (5kW)
- 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 (SMC)
SMC5K48A-M3/I FAQ
1.How can I place an order for SMC5K48A-M3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMC5K48A-M3/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 SMC5K48A-M3/I reliable?
The price and inventory of SMC5K48A-M3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMC5K48A-M3/I is usually 5 days.
3.What payment methods are accepted for SMC5K48A-M3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMC5K48A-M3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMC5K48A-M3/I?
SMC5K48A-M3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMC5K48A-M3/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 SMC5K48A-M3/I?
For technical support, including SMC5K48A-M3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMC5K48A-M3/I requirements.
6.How does Aetrix verify that SMC5K48A-M3/I is sourced from the original manufacturer or authorized distributors?
All SMC5K48A-M3/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 SMC5K48A-M3/I meets industry standards.
7.What is the process for return or replacement of SMC5K48A-M3/I?
All SMC5K48A-M3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMC5K48A-M3/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 SMC5K48A-M3/I part is unused and in its original packaging.
Return procedure for SMC5K48A-M3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMC5K48A-M3/I Tags
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Diodes Incorporated
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