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Vishay General Semiconductor - Diodes Division SMCJ48CA-E3/57T
- Part No.:
- SMCJ48CA-E3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ48CA-E3/57T.pdf
- Description:
- TVS DIODE 48VWM 77.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,390
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Product details
Overview
SMCJ48CA-E3/57T from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed for high-energy surge protection with 48 V standoff voltage, 1500 W peak pulse power rating, and clamping voltage of 77.4 V at 19.4 A peak pulse current. It protects sensitive ICs, MOSFETs, and sensor signal lines in automotive, industrial, and telecom systems against inductive switching transients and lightning-induced surges.
For engineers reviewing the SMCJ48CA-E3/57T datasheet, SMCJ48CA-E3/57T pinout, SMCJ48CA-E3/57T application, or SMCJ48CA-E3/57T equivalent, key selection criteria include bidirectional clamping capability, 1500 W 10/1000 μs surge rating, 77.4 V max clamping voltage at rated IPPM, RoHS-compliant matte tin-plated terminals, and MSL Level 1 moisture sensitivity per J-STD-020.
Technical Context
The SMCJ48CA-E3/57T operates as a silicon avalanche diode with symmetrical breakdown in both directions, enabling robust protection of AC-coupled or differential signal paths without polarity concerns. Its glass-passivated junction ensures stable VBR tolerance (±5% min/max at IT = 1 mA), low incremental surge resistance, and fast sub-nanosecond response to transient events.
Thermally, it features RθJA = 75 °C/W and RθJL = 15 °C/W, supporting reliable operation up to TJ = +150 °C. The device meets UL 497B recognition (QVGQ2) and is rated for 1000 μA max reverse leakage at 48 V standoff, ensuring minimal system loading during normal operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Standoff Voltage (VWM) | 48 V - Maximum continuous reverse operating voltage before clamping begins |
| Breakdown Voltage (VBR) | 53.3–58.9 V at IT = 1 mA - Confirmed symmetric avalanche threshold for bidirectional conduction |
| Clamping Voltage (VC) | 77.4 V at IPPM = 19.4 A (10/1000 μs) - Peak voltage seen by protected circuit during worst-case surge |
| Peak Pulse Power (PPPM) | 1500 W - Sustains standardized 10/1000 μs surge without failure under specified mounting conditions |
| Package | SMC (DO-214AB) - Surface-mount outline with 8.0 mm × 8.0 mm copper pad thermal requirement |
| Operating Temperature | −55 °C to +150 °C - Validated junction temperature range for automotive and industrial environments |
| RoHS Compliance | E3 suffix - Lead-free, halogen-free compliant per JEDEC JESD201 Class 2 whisker test |
Pinout & Package
SMCJ48CA-E3/57T uses the SMC (DO-214AB) package: a surface-mount, molded plastic case with two coplanar matte tin-plated leads. Bidirectional construction means no polarity marking; both terminals are functionally identical and interchangeable in circuit layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient conduction path | Both terminals serve as bidirectional avalanche junction endpoints; no cathode band or polarity identification required |
| Lead 1 / Lead 2 | Thermal and electrical interface | Matte tin-plated, solderable per J-STD-002; each requires 8.0 mm × 8.0 mm copper pad for rated PPPM derating |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals, differential buses (e.g., RS-485), and ungrounded sensor interfaces without polarity constraints |
| 1500 W peak pulse rating | Withstands IEC 61000-4-5 Level 4 (4 kV surge) when properly mounted on 8 mm² copper pads per terminal |
| Low clamping ratio (VC/VWM = 1.61) | Minimizes overvoltage stress on downstream components compared to higher-ratio TVS devices |
| MSL Level 1 rating | Allows unlimited floor life and reflow compatibility up to 260 °C peak without baking or special handling |
| UL 497B recognized (QVGQ2) | Validated for use in telecom and industrial protectors requiring third-party safety certification |
Applications
| Automotive Sensor Protection | Industrial RS-485 Interface |
|---|---|
Use Scenario: Protecting wheel speed, pressure, or temperature sensor outputs in engine control units exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional TVS clamp absorbing ±100 V transients while maintaining signal integrity on analog or PWM sensor lines. Use Value: Prevents latch-up or gate oxide damage in downstream op-amps or microcontroller ADC inputs during vehicle battery disconnect events. | Use Scenario: Safeguarding half-duplex RS-485 transceivers (e.g., SN65HVD230) in factory automation PLCs subjected to EFT and surge coupling from motor drives. IC Role / Device Role / Timing Role: Symmetric clamping across A/B differential pair limits common-mode overvoltage to <80 V during 1 kV/500 A surges. Use Value: Eliminates need for separate unidirectional TVS on each line, reducing BOM count and PCB area while meeting IEC 61000-4-4/5 immunity requirements. |
| Telecom Line Card Surge Protection | Consumer Power Adapter Input Stage |
Use Scenario: Front-end protection of DSL or POTS line interface circuits in central office equipment facing lightning-induced surges on twisted-pair feeds. IC Role / Device Role / Timing Role: Primary surge arrestor placed before hybrid transformer and line driver ICs, clamping transients before they reach active components. Use Value: Withstands repeated 10/1000 μs surges up to 1500 W without degradation, extending field lifetime beyond 10 years in outdoor cabinets. | Use Scenario: Secondary-side transient suppression on 48 V DC input rails of smart home hubs or PoE-powered devices after AC/DC conversion. IC Role / Device Role / Timing Role: Standoff-rated TVS shunting inductive kickback from relay coils or fan motors connected to same rail. Use Value: Limits voltage excursions to ≤77.4 V, preventing overvoltage shutdown or damage to 60 V-rated DC-DC controllers and USB-PD interface ICs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ48CA-E3/52T | Lower PPPM (600 W), smaller SMB (DO-214AA) package, same VWM/VC specs | Suitable only for lower-energy threats (IEC 61000-4-5 Level 2); limited thermal mass reduces surge endurance | Select when board space is constrained and surge threat level is ≤600 W; verify copper pad area reduction does not exceed derating curve limits |
| SMCJ48A-E3/57T | Unidirectional version; includes cathode band marking; identical VWM, VC, and PPPM | Requires correct polarity placement; unsuitable for AC or floating differential signals | Choose only for DC-biased single-ended lines where polarity is fixed and reverse conduction must be blocked |
Compared with SMBJ48CA-E3/52T and SMCJ48A-E3/57T, the SMCJ48CA-E3/57T uniquely delivers bidirectional 1500 W surge capability in the SMC footprint-enabling robust, polarity-agnostic protection where space permits and threat levels demand full-rated energy absorption.
Availability
SMCJ48CA-E3/57T is available at Aetrix Electronics and suitable for automotive sensor modules, industrial RS-485 networks, telecom line cards, and consumer power adapter designs requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMCJ48CA-E3/57T 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, rectifiers, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMCJ series is engineered for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom infrastructure where sustained surge immunity and AEC-Q101 qualification are critical design requirements.
FAQ
What is the clamping voltage of the SMCJ48CA-E3/57T at its rated peak pulse current?
The SMCJ48CA-E3/57T has a maximum clamping voltage (VC) of 77.4 V when subjected to its rated peak pulse current (IPPM) of 19.4 A under the standard 10/1000 μs waveform. This value is measured with the device mounted on 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal, as specified in the Vishay datasheet document 88394. The SMCJ48CA-E3/57T maintains this clamping performance bidirectionally due to its symmetrical avalanche structure.
Is the SMCJ48CA-E3/57T suitable for automotive applications?
Yes, the SMCJ48CA-E3/57T is suitable for automotive applications as a transient suppressor, though the base part number itself is commercial-grade. An AEC-Q101 qualified variant exists under the ordering code SMCJ48CAHE3_X (where "_X" denotes revision), which shares identical electrical specs including 48 V VWM, 77.4 V VC, and 1500 W PPPM. The SMCJ48CA-E3/57T is commonly used in non-safety-critical automotive subsystems such as body control modules and infotainment power rails where full qualification is not mandated.
How does the bidirectional design of the SMCJ48CA-E3/57T affect PCB layout?
The bidirectional design of the SMCJ48CA-E3/57T eliminates polarity constraints: no cathode band marking is present, and either terminal may connect to either side of a differential or AC-coupled signal path. This simplifies layout by removing orientation checks during automated placement and allows reuse across complementary signal pairs. The SMCJ48CA-E3/57T must still be mounted on minimum 8.0 mm × 8.0 mm copper pads per lead to sustain its 1500 W rating, per Vishay's thermal guidelines in document 88394.
What is the maximum reverse leakage current for the SMCJ48CA-E3/57T at its standoff voltage?
The SMCJ48CA-E3/57T exhibits a maximum reverse leakage current (ID) of 1.0 μA at its standoff voltage (VWM) of 48 V, tested at TA = 25 °C. This low leakage ensures minimal quiescent power draw and signal distortion in high-impedance sensor or communication lines. The value is confirmed in the Electrical Characteristics table of Vishay's SMCJ5.0A–SMCJ188CA datasheet (document 88394), and applies equally in both directions due to the device's symmetrical construction.
Does the SMCJ48CA-E3/57T meet UL safety certification requirements?
Yes, the SMCJ48CA-E3/57T is Underwriters Laboratories (UL) recognized under standard UL 497B for protectors, with file number E136766 covering both unidirectional and bidirectional variants. This certification validates its suitability for use in telecom, industrial, and consumer equipment requiring third-party safety approval. The SMCJ48CA-E3/57T achieves this rating without external components, and the UL mark applies directly to the device's construction and performance per Vishay's QVGQ2 classification.
SMCJ48CA-E3/57T 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:
- -
- Bidirectional Channels:
- 1
- 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 (SMCJ)
SMCJ48CA-E3/57T FAQ
1.How can I place an order for SMCJ48CA-E3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ48CA-E3/57T 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 SMCJ48CA-E3/57T reliable?
The price and inventory of SMCJ48CA-E3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ48CA-E3/57T is usually 5 days.
3.What payment methods are accepted for SMCJ48CA-E3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ48CA-E3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ48CA-E3/57T?
SMCJ48CA-E3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ48CA-E3/57T 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 SMCJ48CA-E3/57T?
For technical support, including SMCJ48CA-E3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ48CA-E3/57T requirements.
6.How does Aetrix verify that SMCJ48CA-E3/57T is sourced from the original manufacturer or authorized distributors?
All SMCJ48CA-E3/57T 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 SMCJ48CA-E3/57T meets industry standards.
7.What is the process for return or replacement of SMCJ48CA-E3/57T?
All SMCJ48CA-E3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ48CA-E3/57T, 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 SMCJ48CA-E3/57T part is unused and in its original packaging.
Return procedure for SMCJ48CA-E3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ48CA-E3/57T Tags
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