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Vishay General Semiconductor - Diodes Division SMCJ11-E3/57T
- Part No.:
- SMCJ11-E3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ11-E3/57T.pdf
- Description:
- TVS DIODE 11VWM 20.1VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,959
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Product details
Overview
SMCJ11-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 sensitive electronics. It features a 11 V stand-off voltage (VWM), 12.2–13.5 V breakdown voltage (VBR) at 1 mA, 18.2 V clamping voltage (VC) at 82.4 A peak pulse current (IPPM), and 1500 W peak pulse power (PPPM) with 10/1000 µs waveform - deployed on power rails and signal lines in automotive ECUs and industrial motor drives.
For engineers reviewing the SMCJ11-E3/57T datasheet, SMCJ11-E3/57T pinout, SMCJ11-E3/57T application, or SMCJ11-E3/57T equivalent, key selection criteria include clamping performance under 82.4 A surge, thermal resistance (RθJA = 75 °C/W), AEC-Q101 qualification, RoHS compliance, and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads.
Technical Context
The SMCJ11-E3/57T operates as a silicon avalanche diode with glass-passivated junction, delivering fast response (<1 ns) to transient events such as ESD, load dump, and inductive switching spikes. Its unidirectional polarity uses a cathode band marking and supports reverse-biased protection only - not suitable for AC or bidirectional line protection without external circuitry.
Thermally, it sustains operation from –55 °C to +150 °C junction temperature, with 6.5 W steady-state power dissipation at TA = 50 °C and 200 A non-repetitive forward surge rating (IFSM, 8.3 ms half-sine). Derating applies above 25 °C ambient per Fig. 2 in the datasheet.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 11 V - maximum continuous reverse operating voltage before clamping begins; defines safe DC/AC working limit on protected line |
| VBR min/max | 12.2 V / 13.5 V at IT = 1 mA - guaranteed avalanche initiation range; ensures consistent turn-on across production lots |
| VC @ IPPM | 18.2 V at 82.4 A - clamped voltage during 10/1000 µs surge; determines maximum stress imposed on downstream ICs |
| PPPM | 1500 W - peak transient power handling capability; enables protection against ISO 7637-2 Pulse 5a (load dump) in 12 V systems |
| RθJA | 75 °C/W - junction-to-ambient thermal resistance on standard 8.0 mm × 8.0 mm pads; informs board-level thermal design margin |
| IFSM | 200 A - single half-sine surge rating (8.3 ms); validates robustness against motor commutation or relay bounce transients |
| AEC-Q101 | Qualified - certified for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per JESD22 standards |
Pinout & Package
Package: DO-214AB (SMCJ), surface-mount, low-profile, matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards. Molding compound meets UL 94 V-0. Polarity indicated by 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) in unidirectional configuration |
| Cathode (banded end) | Reverse-blocking / clamping terminal | Connected to protected line (e.g., 12 V rail); avalanche conduction occurs when line exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable, repeatable avalanche characteristics and long-term reliability under repeated surge stress |
| MSL Level 1 (260 °C peak) | Enables standard lead-free reflow without moisture-induced failure; no bake required prior to assembly |
| J-STD-201 Class 1A whisker resistance | Mitigates tin whisker growth risk in high-reliability applications including automotive control modules |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., EFT bursts), improving system immunity |
| Automated placement compatibility | DO-214AB footprint and lead geometry support high-speed pick-and-place with >99.9% placement yield |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V supply inputs in engine control units (ECUs) against load dump transients per ISO 7637-2 Pulse 5a. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and input filter capacitor, clamping surges up to 1500 W. Use Value: Limits peak voltage to ≤18.2 V during 82.4 A surge, preventing damage to upstream regulators and microcontrollers. | Use Scenario: Safeguarding analog sensor outputs (e.g., pressure, temperature) connected to PLC I/O modules exposed to field wiring noise. IC Role / Device Role / Timing Role: TVS mounted at connector entry point, shunting fast transients induced by nearby motor switching or lightning coupling. Use Value: Sub-1 ns response and 18.2 V clamping preserve signal integrity and prevent ADC saturation or latch-up in precision front-end circuits. |
| Consumer Power Adapter Input | Telecom Line Card Surge Suppression |
Use Scenario: Secondary-side DC output protection in wall adapters powering USB-C PD devices, guarding against reverse-polarity misconnection and inrush surges. IC Role / Device Role / Timing Role: Unidirectional TVS on +5 V or +9 V output rail, oriented with cathode toward supply and anode to ground. Use Value: Withstands 200 A IFSM and maintains <10 µA leakage at 11 V, ensuring no standby power penalty while enabling fail-safe shutdown. | Use Scenario: Primary protection stage on Ethernet PHY power pins (e.g., 3.3 V bias rails) in telecom base station line cards subjected to NEBS Level 3 surge requirements. IC Role / Device Role / Timing Role: Standoff-rated TVS absorbing repetitive 10/1000 µs surges up to 1500 W without degradation over 1000+ events. Use Value: AEC-Q101 qualification and RθJL = 15 °C/W ensure stable clamping performance across extended temperature ranges (–40 °C to +85 °C ambient). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ11A-E3/61T | Lower PPPM (400 W), smaller SMA package (DO-214AC), higher RθJA (110 °C/W) | Restricted to lower-energy transients; unsuitable for load dump or high-current industrial surges | Select only for space-constrained consumer applications where peak surge energy ≤400 W |
| SMCJ11CA-E3/57T | Bi-directional variant; same VWM (11 V), symmetric clamping in both polarities; identical PPPM and package | Required for AC-coupled or floating signal lines (e.g., RS-485, CAN bus) where polarity reversal occurs | Choose when protecting bidirectional data lines or ungrounded sensors - not interchangeable with SMCJ11-E3/57T without circuit redesign |
Compared with SMAJ11A-E3/61T, the SMCJ11-E3/57T delivers 3.75× higher surge power handling and superior thermal performance; versus SMCJ11CA-E3/57T, it offers optimized unidirectional clamping but cannot protect against negative-going transients without additional components.
Availability
SMCJ11-E3/57T is available at Aetrix Electronics and suitable for automotive ECU designs, industrial PLC I/O modules, consumer power adapter outputs, and telecom line card protection requiring stable component supply and AEC-Q101 assurance.
Supply support for SMCJ11-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 automotive-grade qualification.
The SMCJ series targets high-energy transient suppression in harsh environments, engineered specifically for ISO 7637-2 and IEC 61000-4-5 compliance in automotive, industrial, and telecom infrastructure applications.
FAQ
What is the clamping voltage of the SMCJ11-E3/57T under maximum rated surge current?
The SMCJ11-E3/57T has a maximum clamping voltage (VC) of 18.2 V when subjected to its rated peak pulse current (IPPM) of 82.4 A using a 10/1000 µs waveform. This value is measured at the device terminals under standardized test conditions and defines the upper voltage limit imposed on protected circuitry during surge events. The SMCJ11-E3/57T maintains this clamping performance consistently across its qualified temperature range.
Is the SMCJ11-E3/57T suitable for bidirectional signal line protection?
No, the SMCJ11-E3/57T is a unidirectional TVS diode and is not suitable for bidirectional signal line protection. Its cathode-band marking indicates polarity-specific operation: it conducts only when the cathode is at higher potential than the anode. For bidirectional protection (e.g., RS-485, CAN, or AC-coupled lines), the bi-directional variant SMCJ11CA-E3/57T must be used instead. Using SMCJ11-E3/57T on bidirectional lines risks failure during negative transients.
Does the SMCJ11-E3/57T meet automotive reliability standards?
Yes, the SMCJ11-E3/57T is AEC-Q101 qualified, confirming compliance with stress tests including high-temperature reverse bias (HTRB), temperature cycling, and ESD per JESD22 standards. The "E3" suffix also denotes RoHS compliance and JESD201 Class 1A whisker resistance - critical for automotive module longevity. These qualifications apply directly to the SMCJ11-E3/57T, not inferred from family data.
What is the recommended PCB pad layout for optimal thermal performance of the SMCJ11-E3/57T?
Vishay specifies a minimum 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pad area for each terminal of the SMCJ11-E3/57T to achieve rated power dissipation and thermal resistance (RθJA = 75 °C/W). Use internal plane connections or thermal vias beneath pads if ambient temperatures exceed 50 °C. The SMCJ11-E3/57T's thermal performance degrades predictably above 25 °C ambient, per Fig. 2 in the datasheet.
Can the SMCJ11-E3/57T replace the SMAJ11A-E3/61T in an existing design?
The SMCJ11-E3/57T is not a drop-in replacement for the SMAJ11A-E3/61T due to package incompatibility (DO-214AB vs. DO-214AC) and significantly higher surge rating (1500 W vs. 400 W). While both share 11 V VWM and unidirectional polarity, the larger SMCJ footprint requires PCB layout revision. Additionally, the SMCJ11-E3/57T's lower RθJA improves thermal margin but demands revised copper pour design. Direct substitution without validation is not recommended.
SMCJ11-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):
- 11V
- Voltage - Breakdown (Min):
- 12.2V
- Voltage - Clamping (Max) @ Ipp:
- 20.1V
- Current - Peak Pulse (10/1000µs):
- 74.6A
- 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)
SMCJ11-E3/57T FAQ
1.How can I place an order for SMCJ11-E3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ11-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 SMCJ11-E3/57T reliable?
The price and inventory of SMCJ11-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 SMCJ11-E3/57T is usually 5 days.
3.What payment methods are accepted for SMCJ11-E3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ11-E3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ11-E3/57T?
SMCJ11-E3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ11-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 SMCJ11-E3/57T?
For technical support, including SMCJ11-E3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ11-E3/57T requirements.
6.How does Aetrix verify that SMCJ11-E3/57T is sourced from the original manufacturer or authorized distributors?
All SMCJ11-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 SMCJ11-E3/57T meets industry standards.
7.What is the process for return or replacement of SMCJ11-E3/57T?
All SMCJ11-E3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ11-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 SMCJ11-E3/57T part is unused and in its original packaging.
Return procedure for SMCJ11-E3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ11-E3/57T Tags
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