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Vishay General Semiconductor - Diodes Division SMCJ48-E3/57T
- Part No.:
- SMCJ48-E3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ48-E3/57T.pdf
- Description:
- TVS DIODE 48VWM 85.5VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,951
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Product details
Overview
SMCJ48-E3/57T from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in DO-214AB (SMCJ) package, designed for robust overvoltage protection of DC power rails and signal lines. It features a 48 V stand-off voltage (VWM), 53.3–58.9 V breakdown voltage (VBR), 77.4 V clamping voltage (VC) at 19.4 A peak pulse current, and 1500 W peak pulse power dissipation with 10/1000 µs waveform - suitable for automotive power supply input stages and industrial sensor interface protection.
For engineers reviewing the SMCJ48-E3/57T datasheet, SMCJ48-E3/57T pinout, SMCJ48-E3/57T application, or SMCJ48-E3/57T equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance (RθJA = 75 °C/W), RoHS-compliant packaging, and real-world use context for ESD/surge hardening in 12 V/24 V systems.
Technical Context
The SMCJ48-E3/57T operates as a unidirectional avalanche diode, clamping transients above its reverse stand-off voltage (48 V) by entering avalanche breakdown. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low leakage (<1.0 µA at VWM), while the DO-214AB package supports automated placement and meets UL 94 V-0 flammability rating.
It is rated for 150 °C maximum junction temperature, derated linearly above 25 °C ambient per Fig. 2, and exhibits 15 °C/W junction-to-lead thermal resistance - enabling effective heat transfer to PCB copper pads (0.31" × 0.31") during surge events. The device is AEC-Q101 qualified and passes JESD 201 Class 1A whisker testing.
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 12 V/24 V systems. |
| VBR min/max | 53.3 V / 58.9 V - Breakdown occurs within this range at 1 mA test current; ensures predictable turn-on timing under surge. |
| VC @ IPPM | 77.4 V - Clamped voltage at 19.4 A peak pulse current; determines maximum stress on downstream ICs during 10/1000 µs transients. |
| PPPM | 1500 W - Peak pulse power handling capability with standard 10/1000 µs waveform; supports IEC 61000-4-5 Level 4 surge immunity. |
| RθJA | 75 °C/W - Junction-to-ambient thermal resistance on recommended pad layout; guides heatsinking requirements for repeated surge duty. |
| TJ max | +150 °C - Maximum allowable junction temperature; enables operation in under-hood automotive environments. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD per AEC-Q101 Rev D. |
Pinout & Package
Package: DO-214AB (SMCJ), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Polarity marked with cathode band on one end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., ground or return path); conducts during forward surges only in uni-directional mode. |
| Cathode | Reverse-biased clamping terminal | Connected to protected line (e.g., +12 V rail); initiates avalanche clamping when reverse voltage exceeds VWM. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR tolerance (±5%), low leakage (<1.0 µA), and long-term reliability under thermal cycling. |
| Low incremental surge resistance | Minimizes clamping voltage overshoot during fast-rising transients (e.g., ISO 7637-2 pulse 1/2a), improving protection margin. |
| MSL Level 1 (J-STD-020) | Allows unlimited floor life and reflow up to 260 °C peak - compatible with standard lead-free SMT assembly without baking. |
| AEC-Q101 qualification | Validates suitability for automotive applications including engine control units, body electronics, and ADAS sensor interfaces. |
| RoHS-compliant (E3 suffix) | Meets EU Directive 2011/65/EU; no lead, mercury, cadmium, hexavalent chromium, PBB, or PBDE in construction. |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 12 V/24 V power inputs in automotive ECUs against load dump (ISO 16750-2) and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and LDO/regulator input to clamp transients before they reach sensitive power management ICs. Use Value: With 77.4 V clamping at 19.4 A and 1500 W rating, it safely absorbs ISO 16750-2 Pulse 5a (12 V system) without failure or degradation. | Use Scenario: Shielding analog output lines (e.g., 4–20 mA current loop) of pressure/temperature sensors in factory automation. IC Role / Device Role / Timing Role: Placed across signal and return lines to shunt ESD (IEC 61000-4-2) and inductive switching noise from solenoid drivers. Use Value: Sub-100 ns response time and <1.0 µA leakage at 48 V ensure minimal signal distortion and zero impact on loop accuracy. |
| Telecom DC Power Feeds | Consumer Device USB Power Ports |
Use Scenario: Safeguarding -48 V DC telecom power distribution boards against lightning-induced surges on outdoor plant wiring. IC Role / Device Role / Timing Role: Mounted at board edge on -48 V feed lines to divert common-mode surges before reaching DC/DC converters and line cards. Use Value: Bidirectional variants exist, but SMCJ48-E3/57T's 48 V VWM aligns precisely with nominal -48 V telecom systems, enabling accurate clamping without false triggering. | Use Scenario: Hardening USB Type-A power delivery paths (VBUS) in smart home hubs against hot-plug transients and cable ESD. IC Role / Device Role / Timing Role: Connected between VBUS and GND to clamp ±15 kV contact ESD per IEC 61000-4-2, preventing latch-up in USB controllers. Use Value: 77.4 V clamping voltage provides >2× margin above 5 V USB spec, ensuring downstream USB PHY ICs remain undamaged. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ48A-E3/61 | Lower PPPM (400 W), smaller SMA package (DO-214AC), higher RθJA (~125 °C/W) | Not suitable for high-energy surges (e.g., ISO 16750-2); limited to low-power signal lines or secondary protection. | Select SMCJ48-E3/57T when primary protection against 1500 W surges is required; choose SMAJ48A-E3/61 only for space-constrained, low-energy zones. |
| SMCJ48CA-E3/57T | Bi-directional version; identical VWM (48 V), same PPPM (1500 W), but symmetric clamping in both polarities | Required for AC-coupled or floating signal lines (e.g., RS-485, CAN bus) where polarity reversal may occur. | Use SMCJ48-E3/57T for DC rails with defined polarity; use SMCJ48CA-E3/57T only when bidirectional clamping is explicitly needed. |
Compared with SMAJ48A-E3/61 and SMCJ48CA-E3/57T, the SMCJ48-E3/57T offers optimal balance of high-energy handling (1500 W), automotive qualification, and unidirectional precision - making it the preferred choice for primary DC rail protection where polarity is fixed and surge energy exceeds 400 W.
Availability
SMCJ48-E3/57T is available at Aetrix Electronics and suitable for automotive power modules, industrial sensor interfaces, and telecom DC distribution systems requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SMCJ48-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 part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-energy transient suppression in harsh environments - including automotive, industrial, and telecom infrastructure where AEC-Q101 compliance and 1500 W surge capability are critical.
FAQ
What is the clamping voltage of the SMCJ48-E3/57T at its rated peak pulse current?
The SMCJ48-E3/57T has a maximum clamping voltage (VC) of 77.4 V at its rated peak pulse current (IPPM) of 19.4 A, measured using the standard 10/1000 µs waveform. This value is guaranteed per the Vishay datasheet (Document Number: 88394, Rev. 11-Dec-12) and defines the upper voltage limit imposed on protected circuits during surge events. Maintaining VC below downstream IC absolute maximum ratings is essential for reliable protection - the SMCJ48-E3/57T achieves this while delivering 1500 W power handling.
Is the SMCJ48-E3/57T suitable for automotive applications?
Yes, the SMCJ48-E3/57T is AEC-Q101 qualified and explicitly rated for automotive use per Vishay's documentation. Its construction includes glass-passivated junction, MSL Level 1 moisture sensitivity, JESD 201 Class 1A whisker resistance, and operation up to +150 °C junction temperature - all validated under AEC-Q101 Rev D test conditions. It is commonly deployed in engine control units, body control modules, and ADAS sensor power supplies where ISO 16750-2 load dump immunity is required. The SMCJ48-E3/57T meets these demands without derating in typical under-hood thermal environments.
What does the "E3/57T" suffix indicate in SMCJ48-E3/57T?
The "E3" suffix denotes RoHS-compliant, commercial-grade construction with matte tin-plated leads and JESD 201 Class 1A whisker resistance. The "57T" indicates packaging in 7-inch diameter plastic tape and reel, with a base quantity of 850 units per reel - optimized for high-volume SMT assembly. This ordering code distinguishes it from alternatives like SMCJ48-E3/9AT (13-inch reel, 3500 units) or SMCJ48HE3/57T (AEC-Q101 qualified variant). All versions share identical electrical specs, but only HE3 variants carry full automotive qualification documentation.
How does the SMCJ48-E3/57T differ from bi-directional TVS diodes like SMCJ48CA-E3/57T?
The SMCJ48-E3/57T is unidirectional, meaning it clamps only in reverse bias (above 48 V) and conducts forward current like a standard diode below ~3.5 V. In contrast, SMCJ48CA-E3/57T is bi-directional, providing symmetrical clamping for both positive and negative transients - ideal for AC signals or floating lines. The unidirectional SMCJ48-E3/57T offers tighter leakage control (<1.0 µA at VWM) and is preferred for DC power rails with known polarity. Its cathode band marking also simplifies orientation during placement - a practical advantage in automated manufacturing.
What PCB layout guidance applies to the SMCJ48-E3/57T for optimal thermal and surge performance?
Vishay specifies mounting the SMCJ48-E3/57T on minimum 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal to achieve rated 1500 W pulse power and 75 °C/W thermal resistance. Traces should be short and wide to minimize inductance, especially on the cathode side, since parasitic inductance increases clamping voltage during fast transients. Avoid thermal relief on pads - solid copper connections maximize heat dissipation. The device must be placed as close as possible to the protected port, with ground plane continuity beneath the pads. These practices ensure the SMCJ48-E3/57T performs to datasheet specifications under real-world surge conditions.
SMCJ48-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:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 48V
- Voltage - Breakdown (Min):
- 53.3V
- Voltage - Clamping (Max) @ Ipp:
- 85.5V
- Current - Peak Pulse (10/1000µs):
- 17.5A
- 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)
SMCJ48-E3/57T FAQ
1.How can I place an order for SMCJ48-E3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ48-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 SMCJ48-E3/57T reliable?
The price and inventory of SMCJ48-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 SMCJ48-E3/57T is usually 5 days.
3.What payment methods are accepted for SMCJ48-E3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ48-E3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ48-E3/57T?
SMCJ48-E3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ48-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 SMCJ48-E3/57T?
For technical support, including SMCJ48-E3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ48-E3/57T requirements.
6.How does Aetrix verify that SMCJ48-E3/57T is sourced from the original manufacturer or authorized distributors?
All SMCJ48-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 SMCJ48-E3/57T meets industry standards.
7.What is the process for return or replacement of SMCJ48-E3/57T?
All SMCJ48-E3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ48-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 SMCJ48-E3/57T part is unused and in its original packaging.
Return procedure for SMCJ48-E3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ48-E3/57T Tags
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