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Vishay General Semiconductor - Diodes Division SMC3K48CA-M3/57
- Part No.:
- SMC3K48CA-M3/57
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMC3K48CA-M3/57.pdf
- Description:
- TVS DIODE 48VWM 77.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,442
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Product details
Overview
SMC3K48CA-M3/57 from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, rated for 3000 W peak pulse power (10/1000 μs), 48 V stand-off voltage (VWM), 53.3–58.9 V breakdown voltage (VBR), and 77.4 V maximum clamping voltage (VC) at 38.8 A peak pulse current - used to protect MOSFETs, ICs, and sensor signal lines against inductive switching transients in automotive and industrial systems.
For engineers reviewing the SMC3K48CA-M3/57 datasheet, SMC3K48CA-M3/57 pinout, SMC3K48CA-M3/57 application, or SMC3K48CA-M3/57 equivalent, key selection criteria include verified bidirectional clamping performance, AEC-Q101 qualification status, M3 halogen-free RoHS-compliant construction, and compatibility with wave-soldering restrictions and thermal derating above 25 °C ambient.
Technical Context
This TVS diode operates as a voltage-clamped surge protection device across bidirectional signal or power rails, responding within nanoseconds to transient overvoltages exceeding its VWM threshold while maintaining low incremental surge resistance. Its clamping action limits downstream voltage stress to ≤77.4 V under 38.8 A (10/1000 μs) surges, with junction temperature rated from –55 °C to +150 °C.
The SMC3K48CA-M3/57 uses an avalanche-based silicon junction structure optimized for high-energy transients, meets J-STD-020 MSL Level 1 moisture sensitivity, and is not recommended for PCB bottom-side wave mounting due to thermal exposure limitations. It carries UL 497B safety recognition (E136766) and complies with ANSI/IEEE C62.35 surge waveform standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 48 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC/AC working margin. |
| VBR min/max | 53.3 V / 58.9 V - Breakdown voltage range at 1 mA test current; ensures consistent turn-on across production lots. |
| VC @ IPPM | 77.4 V - Clamped voltage at 38.8 A peak pulse current; determines worst-case voltage seen by protected circuitry. |
| PPPM | 3000 W - Peak pulse power handling per 10/1000 μs waveform; quantifies single-event surge energy absorption capability. |
| Polarity | Bidirectional - Symmetric clamping for AC-coupled or floating signal lines; no polarity marking required. |
| Package | SMC (DO-214AB) - Standardized 8.0 mm × 8.0 mm copper pad footprint; supports automated placement and reflow. |
| TJ max | +150 °C - Maximum junction temperature; sets thermal design limit for sustained operation and surge duty cycles. |
Pinout & Package
SMC3K48CA-M3/57 is housed in the SMC (DO-214AB) surface-mount package: molded epoxy case meeting UL 94 V-0 flammability rating, matte tin-plated leads solderable per J-STD-002 and JESD 22-B102, and qualified to JESD 201 Class 2 whisker resistance. Bidirectional polarity means both terminals are functionally identical; no cathode/anode marking is applied.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (unmarked) | Surge conduction path | Both terminals serve as symmetrical avalanche junction endpoints; interchangeable in layout. |
| Cathode band (absent) | N/A - bidirectional device | No polarity marking; orientation independent during placement; eliminates assembly errors. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated reliability for automotive electronics including engine control, body modules, and ADAS sensor interfaces. |
| 3000 W peak pulse power (10/1000 μs) | Enables robust protection against ISO 7637-2 Load Dump and IEC 61000-4-5 surge events without cascading failure. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (<1 ns response), improving clamping fidelity. |
| MSL Level 1 (260 °C peak) | Permits standard lead-free reflow profiles without preconditioning; simplifies manufacturing flow. |
| UL 497B recognition (E136766) | Confirms compliance with telecom and industrial safety standards for primary-side surge protection circuits. |
Applications
| Automotive Power Distribution | Industrial Sensor Signal Lines |
|---|---|
Use Scenario: Protecting 12 V/24 V power rails in vehicle ECUs from load dump and alternator ripple. IC Role / Device Role / Timing Role: Primary clamping element placed upstream of DC-DC converters and microcontrollers. Use Value: Limits rail voltage to ≤77.4 V during 3000 W surges, preventing latch-up or gate oxide damage in downstream ICs. |
Use Scenario: Shielding analog outputs of pressure/temperature sensors from ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance shunt protector on differential or single-ended sensor outputs. Use Value: Maintains signal integrity with <100 pF junction capacitance while clamping ±77.4 V transients. |
| Telecom Line Interface | Consumer Appliance Motor Control |
Use Scenario: Safeguarding Ethernet PHY or RS-485 transceivers connected to unshielded outdoor cabling. IC Role / Device Role / Timing Role: Secondary-level surge suppressor between connector and interface IC. Use Value: Absorbs induced lightning surges up to 38.8 A without degradation, preserving data link uptime. |
Use Scenario: Suppressing commutation spikes from brushed DC motors in washing machines or HVAC blowers. IC Role / Device Role / Timing Role: Freewheeling path clamp across motor terminals or H-bridge outputs. Use Value: Dissipates inductive energy without requiring snubber RC networks, reducing BOM count and board space. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMC3K48CAHM3/57 | AEC-Q101 qualified variant with identical electrical specs; HM3 suffix denotes automotive-grade qualification and whisker testing. | Required for new automotive designs where AEC-Q101 compliance is mandatory; same footprint and clamping behavior. | Select SMC3K48CAHM3/57 when automotive qualification is contractually required or for long-lifecycle programs. |
| SMC3K45CA-M3/57 | Lower VWM (45 V) and VBR (50.0–55.3 V); clamps at 72.7 V with higher IPPM (41.3 A). | Better suited for 36 V nominal systems or where tighter clamping margin below 75 V is critical. | Choose SMC3K45CA-M3/57 if system operating voltage is ≤36 V and lower VC is prioritized over 48 V standoff. |
Compared with SMC3K48CA-M3/57, the HM3 variant adds formal automotive qualification without altering electrical performance, while SMC3K45CA-M3/57 trades 3 V lower standoff for tighter clamping - enabling optimization for either qualification rigor or voltage margin in 36–48 V applications.
Availability
SMC3K48CA-M3/57 is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor protection, telecom line interface, and consumer appliance motor control requiring stable component supply and long-term obsolescence management.
Supply support for SMC3K48CA-M3/57 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 reliability, power efficiency, and automotive-grade validation.
The SMC3KxxCA series targets high-energy transient suppression in harsh environments, designed specifically for AEC-Q101-compliant automotive subsystems and industrial equipment exposed to repetitive surge stress.
FAQ
What is the maximum clamping voltage of the SMC3K48CA-M3/57 under surge conditions?
The SMC3K48CA-M3/57 exhibits a maximum clamping voltage (VC) of 77.4 V when subjected to its rated 38.8 A peak pulse current (IPPM) using the standardized 10/1000 μs waveform. This value is measured at the device terminals and represents the upper voltage limit imposed on protected circuitry during transient events - critical for ensuring downstream components remain within their absolute maximum ratings.
Is the SMC3K48CA-M3/57 suitable for automotive applications?
Yes, the SMC3K48CA-M3/57 is AEC-Q101 qualified and UL 497B recognized (file E136766), making it suitable for automotive applications including powertrain control units, body electronics, and ADAS sensor interfaces. While the base M3 version meets commercial-grade reliability, its HM3 counterpart provides full automotive qualification - both share identical electrical characteristics and SMC package dimensions.
Does the SMC3K48CA-M3/57 have polarity markings?
No, the SMC3K48CA-M3/57 is a bidirectional TVS diode and carries no polarity markings on its SMC (DO-214AB) package. Both terminals function identically as symmetrical avalanche junction endpoints, allowing unrestricted orientation during PCB placement - eliminating risk of reverse installation and simplifying automated assembly.
What is the thermal derating behavior of the SMC3K48CA-M3/57 above 25 °C ambient?
The SMC3K48CA-M3/57 follows standard JEDEC thermal derating curves: peak pulse power (PPPM) decreases linearly above TA = 25 °C, reaching ~50 % of rated 3000 W at TJ ≈ 100 °C and zero at +150 °C maximum junction temperature. Designers must apply derating based on actual board thermal resistance and expected surge repetition rate to avoid junction overheating.
Can the SMC3K48CA-M3/57 be used in bottom-side wave soldering processes?
No, the SMC3K48CA-M3/57 is explicitly not recommended for PCB bottom-side wave mounting per Vishay's datasheet. Its SMC package construction and internal thermal constraints make it susceptible to damage under prolonged high-temperature exposure typical of bottom-side wave soldering - reflow soldering or top-side selective wave is preferred for reliable assembly.
SMC3K48CA-M3/57 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):
- 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-M3/57 FAQ
1.How can I place an order for SMC3K48CA-M3/57 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMC3K48CA-M3/57 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 SMC3K48CA-M3/57 reliable?
The price and inventory of SMC3K48CA-M3/57 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMC3K48CA-M3/57 is usually 5 days.
3.What payment methods are accepted for SMC3K48CA-M3/57?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMC3K48CA-M3/57 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMC3K48CA-M3/57?
SMC3K48CA-M3/57 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMC3K48CA-M3/57 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 SMC3K48CA-M3/57?
For technical support, including SMC3K48CA-M3/57 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMC3K48CA-M3/57 requirements.
6.How does Aetrix verify that SMC3K48CA-M3/57 is sourced from the original manufacturer or authorized distributors?
All SMC3K48CA-M3/57 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 SMC3K48CA-M3/57 meets industry standards.
7.What is the process for return or replacement of SMC3K48CA-M3/57?
All SMC3K48CA-M3/57 units undergo pre-shipment inspection (PSI). If there is an issue with SMC3K48CA-M3/57, 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 SMC3K48CA-M3/57 part is unused and in its original packaging.
Return procedure for SMC3K48CA-M3/57:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMC3K48CA-M3/57 Tags
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