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Vishay General Semiconductor - Diodes Division SMCJ48A-E3/57T
- Part No.:
- SMCJ48A-E3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ48A-E3/57T.pdf
- Description:
- TVS DIODE 48VWM 77.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:26,779
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Product details
Overview
SMCJ48A-E3/57T from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed to protect sensitive electronics against voltage transients induced by inductive load switching and lightning surges. It features a 48 V standoff voltage (VWM), 53.3–58.9 V breakdown voltage (VBR) at 1 mA, 77.4 V maximum clamping voltage (VC) at 19.4 A peak pulse current (IPPM), and 1500 W peak pulse power (PPPM) with 10/1000 µs waveform.
For engineers reviewing the SMCJ48A-E3/57T datasheet, SMCJ48A-E3/57T pinout, SMCJ48A-E3/57T application, or SMCJ48A-E3/57T equivalent, key selection criteria include clamping performance under 19.4 A surge, thermal resistance (RθJA = 75 °C/W), unidirectional polarity with cathode band marking, RoHS-compliant matte tin plating, and suitability for automotive-grade designs when ordered with HE3 suffix.
Technical Context
The SMCJ48A-E3/57T operates as a unidirectional avalanche diode, conducting only in reverse bias above its breakdown threshold to clamp transient overvoltages. Its glass-passivated junction ensures stable breakdown characteristics and low incremental surge resistance, enabling fast response time (<1 ns) and reliable protection of downstream ICs, MOSFETs, and sensor signal lines.
Designed for surface-mount assembly on standard PCB pads (0.31" × 0.31" copper), it meets MSL Level 1 per J-STD-020, supports lead-free reflow up to 260 °C peak, and delivers 1500 W transient energy absorption without degradation when operated within its derated thermal envelope (TJ ≤ 150 °C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 48 V - Maximum continuous reverse operating voltage before clamping begins; defines safe working range for protected circuitry. |
| VBR min/max | 53.3 V / 58.9 V at 1 mA - Confirmed breakdown threshold window; ensures predictable turn-on during transients. |
| VC @ IPPM | 77.4 V at 19.4 A - Clamped voltage seen by protected device during full-rated 1500 W surge; critical for I/O voltage margining. |
| PPPM | 1500 W - Peak transient power dissipation capability with 10/1000 µs waveform; determines survivability against common surge standards. |
| ID @ VWM | 1.0 µA - Reverse leakage at standoff voltage; low value minimizes standby power loss and avoids false triggering. |
| TJ max. | +150 °C - Maximum junction temperature; sets thermal design limits for PCB pad area and ambient operating conditions. |
| RθJA | 75 °C/W - Junction-to-ambient thermal resistance; used to calculate temperature rise under DC power dissipation (PD = 6.5 W). |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Polarity indicated by cathode band on unidirectional devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to system ground or lower-potential rail in unidirectional TVS configuration. |
| Cathode | Reverse-biased clamping terminal | Connected to protected line (e.g., power rail or signal trace); clamps to anode when transient exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power rating | Enables robust protection against IEC 61000-4-5 Level 4 (4 kV/2 Ω) surges on 24–48 V industrial and automotive power rails. |
| Glass passivated junction | Ensures stable VBR tolerance and long-term reliability under repeated surge stress without parameter drift. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow without baking; simplifies manufacturing logistics. |
| RoHS-compliant E3 suffix | Meets EU RoHS Directive 2011/65/EU and JESD201 Class 2 whisker resistance; suitable for commercial and industrial end equipment. |
| Low incremental surge resistance | Minimizes clamping voltage overshoot during fast-rising transients (e.g., ESD or inductive kick), improving protection margin. |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
Use Scenario: Protection of gate drivers and microcontroller I/O lines against back-EMF spikes from relay and solenoid switching in PLCs and HVAC controllers. IC Role / Device Role / Timing Role: Unidirectional TVS placed between 24 V supply rail and ground, clamping transients before they reach logic-level components. Use Value: Limits voltage excursion to ≤77.4 V during 19.4 A surges, preserving 3.3 V/5 V MCU inputs and preventing latch-up or permanent damage. | Use Scenario: Safeguarding LIN bus transceivers and sensor interfaces (e.g., temperature, position) from load dump and jump-start events in vehicle cabin modules. IC Role / Device Role / Timing Role: Standoff-rated TVS on 12 V power input, activated only during overvoltage events exceeding 48 V, with minimal leakage (<1 µA) during normal operation. Use Value: Maintains signal integrity across wide temperature range (−55 °C to +150 °C) while meeting AEC-Q101 qualification when specified with HE3 suffix. |
| Telecom Power Supplies | Consumer Appliance Control Boards |
Use Scenario: Input-stage surge suppression on AC/DC adapter outputs feeding PoE-powered switches and base stations. IC Role / Device Role / Timing Role: Primary clamping device on secondary-side 48 V DC bus, coordinated with upstream MOVs and fuses for multi-level protection. Use Value: Absorbs 1500 W transient energy without failure, reducing need for oversized capacitors or redundant protection stages. | Use Scenario: Protecting touch controller and display interface lines in smart home appliances exposed to user-handling ESD and internal relay noise. IC Role / Device Role / Timing Role: Low-capacitance unidirectional TVS on I²C and UART signal paths, minimizing signal distortion while blocking >48 V transients. Use Value: Delivers <1 ns response time and 77.4 V clamping to preserve timing margins in 400 kHz I²C buses and prevent data corruption. |
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-E3/52T | Lower PPPM (600 W), smaller SMB (DO-214AA) package, same VWM/VBR/VC ratings. | Limited to lower-energy surge environments (e.g., consumer USB ports); not suitable for 1500 W industrial transients. | Select when board space is constrained and surge threat level is ≤600 W (IEC 61000-4-5 Level 2). |
| SMCJ48CA-E3/57T | Bidirectional variant; identical VWM/VBR/VC but symmetrical clamping in both polarities; same 1500 W rating. | Required for AC-coupled or differential signal lines (e.g., RS-485, CAN) where polarity reversal occurs. | Choose for bidirectional protection needs; not interchangeable with SMCJ48A-E3/57T due to polarity architecture. |
Compared with SMBJ48A-E3/52T and SMCJ48CA-E3/57T, the SMCJ48A-E3/57T uniquely balances high-energy 1500 W clamping, unidirectional polarity, and SMC package thermal performance-making it optimal for 24–48 V DC power rail protection where directional surge dominance exists.
Availability
SMCJ48A-E3/57T is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, telecom power supplies, and consumer appliance control boards requiring stable component supply and consistent surge immunity performance.
Supply support for SMCJ48A-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, precision, and application-specific optimization.
The SMCJ series is engineered for high-power transient suppression in harsh environments, targeting automotive, industrial, and telecom systems where robustness against lightning, ESD, and inductive switching is mission-critical.
FAQ
What is the clamping voltage of the SMCJ48A-E3/57T under full-rated surge current?
The SMCJ48A-E3/57T has a maximum clamping voltage (VC) of 77.4 V at 19.4 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is measured under standardized test conditions and defines the upper voltage limit imposed on protected circuitry during a full 1500 W transient event. Designers must verify that downstream components tolerate this clamped voltage with appropriate margin.
Is the SMCJ48A-E3/57T suitable for automotive applications?
The SMCJ48A-E3/57T itself is commercial-grade (E3 suffix), but Vishay offers AEC-Q101 qualified versions under ordering codes like SMCJ48AHE3_A/H. For automotive use, specify the HE3 variant to ensure qualification for temperature cycling, humidity, and mechanical shock per AEC-Q101. The SMCJ48A-E3/57T remains suitable for non-automotive industrial or telecom applications requiring the same electrical specs.
How does the SMCJ48A-E3/57T differ from the SMCJ48CA-E3/57T?
The SMCJ48A-E3/57T is unidirectional, with a cathode band marking and clamping action only in reverse bias; the SMCJ48CA-E3/57T is bidirectional, offering symmetrical clamping in both polarities with no polarity marking. Their VWM (48 V), VBR (53.3–58.9 V), VC (77.4 V), and PPPM (1500 W) are identical, but they are not functionally interchangeable due to fundamental polarity architecture differences.
What is the thermal resistance and maximum junction temperature of the SMCJ48A-E3/57T?
The SMCJ48A-E3/57T has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W and a maximum junction temperature (TJ max.) of +150 °C. These values assume mounting on the recommended 0.31" × 0.31" copper pad per terminal. Exceeding TJ max. risks parametric shift or catastrophic failure, so thermal design must account for both DC power dissipation (PD = 6.5 W) and transient heating.
Does the SMCJ48A-E3/57T require special PCB layout considerations?
Yes-the SMCJ48A-E3/57T should be mounted using the minimum recommended pad layout (0.31" × 0.31" copper per terminal) to achieve rated thermal and surge performance. Short, low-inductance traces to ground and protected line minimize voltage overshoot during fast transients. Avoid routing high-speed signals near the device, and ensure the cathode band aligns with the protected net to maintain correct polarity orientation.
SMCJ48A-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:
- 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 (SMCJ)
SMCJ48A-E3/57T FAQ
1.How can I place an order for SMCJ48A-E3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ48A-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 SMCJ48A-E3/57T reliable?
The price and inventory of SMCJ48A-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 SMCJ48A-E3/57T is usually 5 days.
3.What payment methods are accepted for SMCJ48A-E3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ48A-E3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ48A-E3/57T?
SMCJ48A-E3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ48A-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 SMCJ48A-E3/57T?
For technical support, including SMCJ48A-E3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ48A-E3/57T requirements.
6.How does Aetrix verify that SMCJ48A-E3/57T is sourced from the original manufacturer or authorized distributors?
All SMCJ48A-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 SMCJ48A-E3/57T meets industry standards.
7.What is the process for return or replacement of SMCJ48A-E3/57T?
All SMCJ48A-E3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ48A-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 SMCJ48A-E3/57T part is unused and in its original packaging.
Return procedure for SMCJ48A-E3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ48A-E3/57T Tags
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