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Vishay General Semiconductor - Diodes Division SMCJ48A-M3/57T
- Part No.:
- SMCJ48A-M3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ48A-M3/57T.pdf
- Description:
- TVS DIODE 48VWM 77.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,283
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Product details
Overview
SMCJ48A-M3/57T from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for robust overvoltage protection of DC power rails and signal lines. It features a 48 V standoff voltage (VWM), 53.3–58.9 V breakdown range (VBR at 1 mA), 77.4 V maximum clamping voltage (VC) at 19.4 A peak pulse current, and 1500 W peak pulse power rating with 10/1000 µs waveform - deployed in automotive power supply inputs and industrial sensor interfaces.
For engineers reviewing the SMCJ48A-M3/57T datasheet, SMCJ48A-M3/57T pinout, SMCJ48A-M3/57T application, or SMCJ48A-M3/57T equivalent, key selection criteria include unidirectional polarity, halogen-free RoHS-compliant construction (M3 suffix), 150 °C max junction temperature, and compatibility with automated SMT placement on 8 mm × 8 mm copper pads per terminal.
Technical Context
The SMCJ48A-M3/57T operates as a silicon avalanche diode that enters controlled breakdown above its VWM to clamp transient surges while maintaining low leakage (<1 µA at 48 V). Its glass-passivated junction ensures stable VBR tolerance (±5%) and fast response time (<1 ns), enabling protection against ESD, lightning-induced spikes, and inductive switching transients.
Thermally, it exhibits RθJA = 75 °C/W (typ.) and RθJL = 15 °C/W (typ.), supporting reliable operation up to 150 °C junction temperature when mounted per recommended pad layout. The device meets MSL Level 1 per J-STD-020 and is rated for 200 A non-repetitive forward surge (8.3 ms half-sine).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 48 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC rail margin for 48 V systems. |
| VBR (min/max) | 53.3 V / 58.9 V at 1 mA - Confirmed breakdown threshold range; ensures predictable turn-on under surge conditions. |
| VC @ IPPM | 77.4 V at 19.4 A - Clamped voltage during 1500 W transient; determines protected circuit's maximum stress level. |
| PPPM | 1500 W - Peak pulse power handling with 10/1000 µs waveform; validates suitability for IEC 61000-4-5 Level 4 surges. |
| IFSM | 200 A - Single half-sine surge current rating (8.3 ms); supports protection of 24/48 V industrial power supplies. |
| TJ max | +150 °C - Maximum junction temperature; enables use in under-hood automotive and high-ambient industrial environments. |
| Package | SMC (DO-214AB) - Standardized surface-mount outline with 8.0 mm × 8.0 mm thermal pad footprint; compatible with JEDEC MS-013. |
Pinout & Package
SMCJ48A-M3/57T uses the SMC (DO-214AB) package: molded plastic body with matte tin-plated leads, cathode indicated by a band on the case. Mounting requires 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal for rated thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection in unidirectional configuration | Connected to ground or return path; completes clamping loop during positive transients on cathode side. |
| Cathode | High-side connection; marked with band | Connected to protected line (e.g., 48 V rail); conducts avalanche current to anode during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| Halogen-free, RoHS-compliant (M3 suffix) | Meets environmental compliance requirements for automotive and industrial OEMs without compromising surge robustness. |
| Glass-passivated junction | Ensures stable VBR tolerance and long-term reliability under repeated surge stress and thermal cycling. |
| MSL Level 1 rating | Supports standard reflow profiles up to 260 °C peak without preconditioning; eliminates moisture sensitivity concerns. |
| 1500 W peak pulse power | Provides headroom for IEC 61000-4-5 combination wave (1.2/50 µs voltage + 8/20 µs current) testing at system level. |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients, improving protection margin for downstream ICs. |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 48 V battery-fed ECUs from load dump and alternator transients in commercial vehicles. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and input filter capacitor to clamp surges above 48 V. Use Value: Limits peak voltage to ≤77.4 V during 1500 W transients, preventing damage to DC-DC controllers and microcontrollers. | Use Scenario: Safeguarding analog outputs of pressure/temperature sensors connected to PLC I/O modules. IC Role / Device Role / Timing Role: TVS installed across sensor output and ground to absorb ESD and cable discharge events. Use Value: Sub-1 ns response and <1 µA leakage at 48 V preserve signal integrity and measurement accuracy in 4–20 mA loops. |
| Telecom DC Power Distribution | Motor Drive Control Board Protection |
Use Scenario: Shielding 48 V telecom rectifier outputs from induced surges on long feeder cables. IC Role / Device Role / Timing Role: Primary clamping device on main DC bus prior to point-of-load regulators. Use Value: 200 A IFSM rating handles repetitive inrush and fault currents without degradation. | Use Scenario: Protecting gate drivers and feedback circuits from cross-talk and inductive kickback in BLDC inverters. IC Role / Device Role / Timing Role: Localized TVS on isolated 15 V gate supply and current sense amplifier inputs. Use Value: 75 °C/W RθJA allows direct PCB mounting near heat sources without derating penalties. |
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-M3/57T | Lower PPPM (600 W), smaller SMB package, same VWM/VC ratings | Limited to lower-energy transients; unsuitable for IEC 61000-4-5 Level 4 | Select when board space is constrained and surge energy is ≤600 W. |
| SMCJ48CA-M3/57T | Bidirectional variant; identical VWM, VBR, VC, and PPPM; no polarity marking | Required for AC-coupled or bidirectional signal lines (e.g., RS-485, CAN FD) | Choose only if protecting symmetric signals or where reverse polarity risk exists. |
Compared with SMBJ48A-M3/57T and SMCJ48CA-M3/57T, the SMCJ48A-M3/57T delivers full 1500 W surge capability in a unidirectional configuration optimized for DC power rail protection - offering superior energy handling over SMBJ while avoiding unnecessary bidirectional complexity in single-polarity systems.
Availability
SMCJ48A-M3/57T is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interface design, and telecom DC infrastructure requiring stable component supply and halogen-free compliance.
Supply support for SMCJ48A-M3/57T 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The SMCJ series is engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where robustness, thermal stability, and AEC-Q101 qualification matter.
FAQ
What is the clamping voltage of the SMCJ48A-M3/57T under maximum rated surge current?
The SMCJ48A-M3/57T has a maximum clamping voltage (VC) of 77.4 V at its rated peak pulse current (IPPM) of 19.4 A, measured with a 10/1000 µs waveform. This value defines the upper voltage limit imposed on the protected circuit during a full 1500 W transient event, and is confirmed in Vishay's official datasheet revision 09-Jan-2024 (Document Number: 88394). The SMCJ48A-M3/57T maintains this clamping performance across its specified operating temperature range.
Does the SMCJ48A-M3/57T meet automotive qualification standards?
The base SMCJ48A-M3/57T is not AEC-Q101 qualified; it is a commercial-grade, halogen-free, RoHS-compliant part. However, Vishay offers AEC-Q101 variants under ordering codes such as SMCJ48A-HM3/57T (with HM3 suffix), which include additional stress testing and traceability. The SMCJ48A-M3/57T itself is widely used in automotive subsystems where full qualification is not mandated, but its thermal and surge ratings align with under-hood ambient requirements up to +150 °C.
How does the M3 suffix affect the SMCJ48A-M3/57T's material composition and compliance?
The M3 suffix on SMCJ48A-M3/57T indicates halogen-free, RoHS-compliant construction per Vishay's material categorization standard (www.vishay.com/doc?99912). This means brominated flame retardants and chlorine-based compounds are excluded from the molding compound and plating, meeting stringent environmental regulations for industrial and consumer electronics. The SMCJ48A-M3/57T retains identical electrical and thermal specifications as its E3 counterpart, differing only in material content.
Can the SMCJ48A-M3/57T be used in bidirectional signal protection applications?
No - the SMCJ48A-M3/57T is strictly unidirectional, with polarity marked by a cathode band. For bidirectional protection (e.g., RS-485, CAN, or AC-coupled lines), the SMCJ48CA-M3/57T must be used instead. Attempting to use the SMCJ48A-M3/57T in reverse-biased configurations risks permanent failure, as it lacks symmetrical breakdown characteristics. The SMCJ48A-M3/57T is intended solely for DC rail or unidirectional signal line clamping.
What is the recommended PCB pad layout for optimal thermal and surge performance of the SMCJ48A-M3/57T?
Vishay specifies a minimum 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pad area for each terminal of the SMCJ48A-M3/57T to achieve rated thermal resistance (RθJA = 75 °C/W) and full 1500 W pulse power capability. The pads must be solid, unbroken, and directly connected to internal ground/power planes via multiple thermal vias. Deviating from this layout - such as using smaller pads or isolated traces - will increase junction temperature and reduce surge endurance. This requirement applies to the SMCJ48A-M3/57T regardless of ambient temperature or airflow.
SMCJ48A-M3/57T 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):
- 19.4A
- Power - Peak Pulse:
- 1500W (1.5kW)
- 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)
SMCJ48A-M3/57T FAQ
1.How can I place an order for SMCJ48A-M3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ48A-M3/57T 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 SMCJ48A-M3/57T reliable?
The price and inventory of SMCJ48A-M3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ48A-M3/57T is usually 5 days.
3.What payment methods are accepted for SMCJ48A-M3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ48A-M3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ48A-M3/57T?
SMCJ48A-M3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ48A-M3/57T 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 SMCJ48A-M3/57T?
For technical support, including SMCJ48A-M3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ48A-M3/57T requirements.
6.How does Aetrix verify that SMCJ48A-M3/57T is sourced from the original manufacturer or authorized distributors?
All SMCJ48A-M3/57T 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 SMCJ48A-M3/57T meets industry standards.
7.What is the process for return or replacement of SMCJ48A-M3/57T?
All SMCJ48A-M3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ48A-M3/57T, 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 SMCJ48A-M3/57T part is unused and in its original packaging.
Return procedure for SMCJ48A-M3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ48A-M3/57T Tags
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