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Vishay General Semiconductor - Diodes Division SMCJ8.0-E3/57T
- Part No.:
- SMCJ8.0-E3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ8.0-E3/57T.pdf
- Description:
- TVS DIODE 8VWM 15VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,488
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Product details
Overview
SMCJ8.0-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 8.0 V stand-off voltage (VWM), 8.89–9.83 V breakdown voltage (VBR) at 10 mA, 13.6 V clamping voltage (VC) at 110.3 A peak pulse current (IPPM), and 1500 W peak pulse power (PPPM) with 10/1000 µs waveform - deployed in automotive ECUs and industrial sensor interfaces.
For engineers reviewing the SMCJ8.0-E3/57T datasheet, SMCJ8.0-E3/57T pinout, SMCJ8.0-E3/57T application, or SMCJ8.0-E3/57T equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, 150 °C max junction temperature, RoHS-compliant matte tin plating, and MSL Level 1 moisture sensitivity - critical for high-reliability automotive and industrial PCB designs.
Technical Context
The SMCJ8.0-E3/57T operates as a silicon avalanche diode, clamping transients by entering breakdown when reverse voltage exceeds VBR (8.89–9.83 V). Its low incremental surge resistance and fast response time (<1 ns) enable effective suppression of ESD, lightning-induced surges, and inductive switching spikes on 5–12 V supply rails.
Designed for surface-mount assembly on 8.0 mm × 8.0 mm copper pads per terminal, it delivers 6.5 W steady-state power dissipation at TA = 50 °C and exhibits thermal resistance RθJA = 75 °C/W and RθJL = 15 °C/W - supporting thermal management in compact, convection-cooled layouts without heatsinks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.0 V - maximum continuous reverse operating voltage before clamping begins; sets upper limit for protected circuit's normal DC rail. |
| VBR (min/max) | 8.89 V / 9.83 V at IT = 10 mA - defines reliable avalanche onset range; ensures consistent triggering across production lots. |
| VC @ IPPM | 13.6 V at 110.3 A - clamped voltage during 1500 W transient; determines worst-case overvoltage seen by downstream ICs. |
| PPPM | 1500 W (10/1000 µs) - peak surge energy handling capacity; qualifies for IEC 61000-4-5 Level 4 (4 kV) system-level surge testing. |
| TJ max | +150 °C - maximum junction temperature; enables operation in under-hood automotive environments and sealed industrial enclosures. |
| Polarity | Unidirectional - cathode marked with band; blocks forward current above ~3.5 V (VF at 100 A), protects only against negative transients on positive rails. |
| MSL Level | Level 1 (J-STD-020) - no floor life limitation; supports standard reflow without dry-pack or baking requirements. |
Pinout & Package
Package: DO-214AB (SMCJ), surface-mount, low-profile case with molded epoxy body and matte tin-plated leads. Cathode identified by a visible band on one end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current path / reference node for clamping | Connected to ground or lower-potential rail; establishes reference for reverse-biased avalanche operation. |
| Cathode | Protected line input / high-side connection | Connected to the line being protected (e.g., +12 V rail); clamps to anode when transient exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures stable VBR tolerance and long-term reliability under repeated surge stress without parameter drift. |
| AEC-Q101 qualified | Validated for automotive applications including engine control, body electronics, and ADAS sensor interfaces. |
| Low incremental surge resistance | Minimizes VC rise under high IPPM, improving clamping precision and reducing stress on downstream MOSFETs or regulators. |
| UL 94 V-0 molding compound | Meets flammability safety requirement for enclosed industrial and automotive assemblies. |
| JESD 201 Class 1A whisker resistance | E3 suffix confirms mitigation of tin whisker growth - critical for long-life, high-reliability solder joints. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed microcontroller power inputs in engine control units against load dump and alternator transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VCC and GND, clamping negative-going spikes and limiting positive overshoot to ≤13.6 V. Use Value: Prevents latch-up or permanent damage to 3.3 V/5 V logic ICs by holding rail voltage within safe operating limits during ISO 7637-2 Pulse 5a events. | Use Scenario: Shielding analog output lines (e.g., 4–20 mA transmitter outputs) from ESD and field-wiring induced surges in factory automation systems. IC Role / Device Role / Timing Role: TVS connected across output and return, absorbing fast transients before they reach precision DAC or op-amp output stages. Use Value: Maintains signal integrity and prevents calibration drift by limiting transient-induced voltage excursions beyond ±15 V on sensitive analog nodes. |
| Consumer Power Adapter Input Protection | Telecom DC Feeder Line Protection |
Use Scenario: Safeguarding primary-side DC bus of USB-C PD adapters against surge coupling from AC mains or hot-plug events. IC Role / Device Role / Timing Role: Unidirectional clamp on 9–20 V intermediate bus, triggered only during overvoltage conditions while remaining transparent during normal operation. Use Value: Enables compliance with UL 62368-1 transient immunity requirements without adding series impedance or affecting regulation loop stability. | Use Scenario: Protecting -48 V DC feeder lines in telecom base station remote radio units from lightning-induced common-mode surges. IC Role / Device Role / Timing Role: Paired unidirectional TVS devices (anode-to-rail, cathode-to-GND) providing coordinated clamping on dual-polarity distribution networks. Use Value: Limits surge-induced voltage excursion to <15 V peak, preventing damage to PoE controllers and Ethernet PHYs without degrading DC power delivery efficiency. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ8.0A-E3/61 | Lower PPPM (400 W), smaller DO-214AC (SMA) package, same VWM/VBR/VC specs. | Not rated for AEC-Q101; limited to commercial-grade consumer/industrial use. | Select when board space is constrained and surge energy demand is ≤400 W (e.g., low-power IoT sensors). |
| SMCJ8.0CA-E3/57T | Bi-directional variant; identical VWM/VBR/VC but symmetric clamping in both polarities. | Required for AC-coupled or bidirectional signal lines (e.g., RS-485, CAN FD) where negative transients must also be suppressed. | Choose when protecting differential buses or floating references where polarity reversal is possible. |
Compared with SMAJ8.0A-E3/61 and SMCJ8.0CA-E3/57T, the SMCJ8.0-E3/57T uniquely balances 1500 W surge capability, AEC-Q101 qualification, and DO-214AB thermal performance - making it optimal for high-energy, automotive-grade DC rail protection where reliability and power handling are non-negotiable.
Availability
SMCJ8.0-E3/57T is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor modules, and telecom DC power distribution systems requiring stable component supply and full traceability.
Supply support for SMCJ8.0-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, TVS, MOSFETs, and optoelectronics with emphasis on reliability, ruggedness, and automotive qualification.
The SMCJ series belongs to Vishay's TRANSZORB® family of transient voltage suppressors, engineered specifically for high-energy surge immunity in harsh environments - targeting automotive, industrial, and telecom infrastructure applications demanding AEC-Q101 and UL recognition.
FAQ
What is the clamping voltage of the SMCJ8.0-E3/57T under maximum surge conditions?
The SMCJ8.0-E3/57T clamps to 13.6 V at its rated peak pulse current of 110.3 A (10/1000 µs waveform). This value represents the maximum voltage imposed on the protected circuit during a full 1500 W transient event - a critical parameter for ensuring downstream ICs remain within absolute maximum ratings. The clamping behavior is repeatable and specified across temperature and production lot variations.
Is the SMCJ8.0-E3/57T suitable for automotive applications?
Yes, the SMCJ8.0-E3/57T is AEC-Q101 qualified and explicitly rated for automotive use. Its construction - including glass-passivated junction, matte tin plating compliant with JESD 201 Class 1A, UL 94 V-0 molding, and guaranteed operation from –55 °C to +150 °C - meets stringent requirements for engine control, body electronics, and ADAS subsystems. The "E3" suffix confirms RoHS compliance and commercial/AEC-Q101 dual qualification.
How does the SMCJ8.0-E3/57T differ from the bi-directional SMCJ8.0CA-E3/57T?
The SMCJ8.0-E3/57T is unidirectional and clamps only reverse-polarity transients (cathode-to-anode), while the SMCJ8.0CA-E3/57T is bi-directional and suppresses surges of either polarity. Both share identical VWM (8.0 V), VBR (8.89–9.83 V), and VC (13.6 V), but the CA version has no polarity marking and is used where AC signals or reversible voltage rails require symmetrical protection - such as in CAN, RS-485, or audio line interfaces.
What is the recommended PCB layout for optimal thermal and electrical performance of the SMCJ8.0-E3/57T?
Vishay specifies mounting the SMCJ8.0-E3/57T on minimum 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal to achieve rated PPPM and thermal derating. Use short, wide traces to minimize inductance; avoid vias in high-current paths. The DO-214AB package's low RθJL (15 °C/W) relies on direct thermal conduction through leads - so ensure full-solder coverage on both terminals and consider internal copper planes for enhanced heat spreading in high-duty-cycle applications.
Does the SMCJ8.0-E3/57T require derating at elevated ambient temperatures?
Yes, the SMCJ8.0-E3/57T must be derated above TA = 25 °C per Figure 2 in the Vishay datasheet (Doc. #88394). At TA = 85 °C, its peak pulse power drops to approximately 75 % of 1500 W (~1125 W), and at TA = 125 °C, it falls to ~40 %. Derating ensures junction temperature remains ≤150 °C during surge events. For continuous operation, its 6.5 W power dissipation rating applies only at TA = 50 °C - further derating is required at higher ambient temperatures.
SMCJ8.0-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):
- 8V
- Voltage - Breakdown (Min):
- 8.89V
- Voltage - Clamping (Max) @ Ipp:
- 15V
- Current - Peak Pulse (10/1000µs):
- 100A
- 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)
SMCJ8.0-E3/57T FAQ
1.How can I place an order for SMCJ8.0-E3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ8.0-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 SMCJ8.0-E3/57T reliable?
The price and inventory of SMCJ8.0-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 SMCJ8.0-E3/57T is usually 5 days.
3.What payment methods are accepted for SMCJ8.0-E3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ8.0-E3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ8.0-E3/57T?
SMCJ8.0-E3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ8.0-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 SMCJ8.0-E3/57T?
For technical support, including SMCJ8.0-E3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ8.0-E3/57T requirements.
6.How does Aetrix verify that SMCJ8.0-E3/57T is sourced from the original manufacturer or authorized distributors?
All SMCJ8.0-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 SMCJ8.0-E3/57T meets industry standards.
7.What is the process for return or replacement of SMCJ8.0-E3/57T?
All SMCJ8.0-E3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ8.0-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 SMCJ8.0-E3/57T part is unused and in its original packaging.
Return procedure for SMCJ8.0-E3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ8.0-E3/57T Tags
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