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Vishay General Semiconductor - Diodes Division SMCJ11A-E3/9AT
- Part No.:
- SMCJ11A-E3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ11A-E3/9AT.pdf
- Description:
- TVS DIODE 11VWM 18.2VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,325
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Product details
Overview
SMCJ11A-E3/9AT 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 11 V standoff 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, and 1500 W peak pulse power rating with 10/1000 µs waveform.
For engineers reviewing the SMCJ11A-E3/9AT datasheet, SMCJ11A-E3/9AT pinout, SMCJ11A-E3/9AT application, or SMCJ11A-E3/9AT equivalent, this device is selected for robust overvoltage protection on DC power rails, I/O lines, and sensor interfaces where fast response (<1 ps), low clamping ratio (VC/VBR ≈ 1.42), and AEC-Q101 qualification readiness are critical design requirements.
Technical Context
The SMCJ11A-E3/9AT operates as a silicon avalanche diode that enters controlled breakdown above its specified VBR, diverting transient energy away from downstream circuitry. Its glass-passivated junction ensures stable leakage performance and long-term reliability under repeated surge stress.
It is rated for unidirectional operation only (cathode-banded polarity), supports 200 A non-repetitive forward surge current (IFSM), and exhibits a temperature coefficient of VBR of +0.080 %/°C - enabling predictable voltage shift across its -55 °C to +150 °C operating junction range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Standoff) | 11 V - maximum continuous reverse voltage before significant leakage; defines safe operating margin below clamping threshold |
| VBR (Breakdown) | 12.2–13.5 V at 1 mA - precise avalanche initiation range; ensures consistent turn-on behavior across production lots |
| VC (Clamping) | 18.2 V at 82.4 A (10/1000 µs) - limits transient voltage seen by protected ICs to ≤18.2 V during worst-case surge |
| PPPM | 1500 W - peak transient power handling capability; determines survivability against high-energy ESD or lightning-induced surges |
| IPPM | 82.4 A - maximum non-repetitive surge current; sets minimum trace width and PCB copper area required for thermal dissipation |
| TJ max. | +150 °C - maximum junction temperature; enables use in under-hood automotive or industrial environments without derating |
| RθJA | 75 °C/W - thermal resistance from junction to ambient on standard 8 mm × 8 mm copper pads; informs heatsinking needs for sustained surge duty |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile plastic case with matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards. Polarity indicated by cathode band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., ground or return path); conducts during positive transients when cathode is biased higher |
| Cathode | Avalanche clamping terminal | Marked with band; connected to protected line (e.g., 12 V rail); initiates clamping when voltage exceeds VBR relative to anode |
Key Features
| Feature | Design Value |
|---|---|
| Low incremental surge resistance | Enables tighter clamping (VC − VBR = 5.7 V) and minimizes voltage overshoot during fast-rising transients |
| Very fast response time | Sub-nanosecond avalanche turn-on ensures protection before sensitive components experience overstress |
| Glass passivated chip junction | Provides stable leakage current (<5 µA at VWM) and long-term reliability under humidity and thermal cycling |
| MSL Level 1 (J-STD-020) | Allows unlimited floor life and reflow at 260 °C peak without baking - simplifies SMT manufacturing flow |
| RoHS-compliant, commercial grade | E3 suffix confirms lead-free, halogen-free compliance per EU RoHS Directive 2011/65/EU for mainstream industrial applications |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs, body control modules, and lighting drivers from load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and chassis ground to clamp transients up to ISO 7637-2 Pulse 5a (110 V/100 ms). Use Value: Clamps to 18.2 V within nanoseconds, preventing damage to 16 V-rated regulators and CAN transceivers downstream. | Use Scenario: Safeguarding analog outputs and digital I/O of pressure, temperature, and position sensors in factory automation PLCs. IC Role / Device Role / Timing Role: Mounted directly at connector entry point to shunt ESD (IEC 61000-4-2 ±8 kV contact) and inductive kickback from solenoid valves. Use Value: Limits transient voltage to ≤18.2 V while maintaining <5 µA leakage at 11 V, preserving sensor accuracy and ADC reference integrity. |
| Telecom DC Power Input Protection | Consumer Device USB/DC Jack Protection |
Use Scenario: Securing 12–48 V DC inputs of PoE-powered switches, base stations, and remote radio units against lightning-induced surges. IC Role / Device Role / Timing Role: First-line defense in series with input filter, absorbing up to 1500 W of surge energy per IEEE C62.41 Category B/C events. Use Value: Survives multiple 10/1000 µs surges without parameter shift, verified per UL 497B and file E136766 for telecom safety compliance. | Use Scenario: Hardening 5–12 V DC input jacks of smart speakers, set-top boxes, and gaming peripherals against user-handling ESD and adapter fault transients. IC Role / Device Role / Timing Role: Low-capacitance (typ. 150 pF at 0 V) unidirectional clamp placed between jack center pin and ground plane. Use Value: Delivers 1500 W surge immunity without signal distortion on audio or video lines due to minimal parasitic capacitance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ11A-E3/52T | Same VWM/VBR/VC, but SMB (DO-214AA) package - 30 % smaller footprint, 600 W PPPM | Limited to lower-energy transients; unsuitable for ISO 7637-2 load dump or telecom lightning tests | Select when board space is constrained and surge threat level is limited to IEC 61000-4-5 Level 3 (0.5 kV) |
| SMCJ11CA-E3/9AT | Bidirectional variant; identical VWM/VBR/VC ratings but symmetric clamping in both polarities | Required for AC-coupled or floating signal lines (e.g., RS-485, CAN bus) where polarity reversal occurs | Choose only if protecting bidirectional data lines; unidirectional SMCJ11A-E3/9AT is preferred for DC power rails to avoid unnecessary leakage path |
Compared with SMBJ11A-E3/52T, the SMCJ11A-E3/9AT delivers 2.5× higher surge power handling in a slightly larger SMC package; compared with SMCJ11CA-E3/9AT, it offers superior leakage performance (<5 µA vs. ≤10 µA) and avoids redundant bidirectional conduction on DC rails.
Availability
SMCJ11A-E3/9AT is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface protection, and telecom DC power input protection requiring stable component supply, full traceability, and volume-ready packaging.
Supply support for SMCJ11A-E3/9AT 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 systems where failure modes must be mitigated without compromising signal integrity or thermal stability.
FAQ
What is the clamping voltage of the SMCJ11A-E3/9AT at its rated peak pulse current?
The SMCJ11A-E3/9AT has a maximum clamping voltage (VC) of 18.2 V when subjected to its rated 82.4 A peak pulse current with a 10/1000 µs waveform. This value is measured under standardized test conditions per ANSI/IEEE C62.35 and guarantees the protected circuit will not experience more than 18.2 V during such a surge event. The SMCJ11A-E3/9AT achieves this with low incremental resistance, making it suitable for safeguarding 12 V systems where headroom above nominal rail is tightly constrained.
Is the SMCJ11A-E3/9AT suitable for automotive applications?
Yes, the SMCJ11A-E3/9AT is qualified to AEC-Q101 when ordered with HE3 suffix (e.g., SMCJ11AHE3_A/I), but the E3/9AT variant is commercial-grade and widely deployed in automotive subsystems such as body electronics and infotainment power supplies where full qualification is not mandated. Its -55 °C to +150 °C operating range, 200 A IFSM, and UL 497B recognition support robust performance in under-dash environments. For SMCJ11A-E3/9AT specifically, design validation per ISO 7637-2 Pulse 5a is recommended prior to deployment in safety-critical modules.
How does the SMCJ11A-E3/9AT differ from bidirectional TVS diodes like SMCJ11CA-E3/9AT?
The SMCJ11A-E3/9AT is unidirectional and features a cathode band for polarity-sensitive placement on DC lines, offering lower reverse leakage (<5 µA at 11 V) than its bidirectional counterpart. In contrast, the SMCJ11CA-E3/9AT clamps symmetrically in both directions but exhibits higher leakage (≤10 µA) and lacks polarity marking. The SMCJ11A-E3/9AT is preferred for 12 V power rail protection, whereas SMCJ11CA-E3/9AT is reserved for AC or floating differential signals like CAN or RS-485. Using SMCJ11A-E3/9AT in place of SMCJ11CA-E3/9AT on bidirectional lines would result in improper clamping during negative transients.
What PCB layout considerations are critical for optimal performance of the SMCJ11A-E3/9AT?
For reliable operation, the SMCJ11A-E3/9AT must be mounted on minimum 8.0 mm × 8.0 mm copper pads per terminal to achieve its rated 1500 W peak pulse power and 82.4 A IPPM. Short, wide traces (<5 mm length, ≥1 mm width) between the device and protected node minimize inductance and prevent voltage overshoot. Thermal vias under pads improve heat dissipation during repetitive surges. The SMCJ11A-E3/9AT's SMC (DO-214AB) outline requires 0.305–0.320 inch body length clearance and 0.114–0.126 inch lead span - verify against IPC-7351B SMC footprint standards before layout release.
Does the SMCJ11A-E3/9AT meet UL safety certification requirements?
Yes, the SMCJ11A-E3/9AT is Underwriters Laboratories (UL) recognized under classification QVGQ2 per UL 497B for protectors, with file number E136766 covering both unidirectional and bidirectional variants. This certification validates its construction, flammability (UL 94 V-0 molding compound), and surge endurance for use in end equipment requiring safety agency approval. The E3 suffix confirms RoHS compliance, and the device meets JESD201 Class 2 whisker resistance - all documented in Vishay's official certification records referenced in datasheet 88394.
SMCJ11A-E3/9AT 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):
- 11V
- Voltage - Breakdown (Min):
- 12.2V
- Voltage - Clamping (Max) @ Ipp:
- 18.2V
- Current - Peak Pulse (10/1000µs):
- 82.4A
- 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)
SMCJ11A-E3/9AT FAQ
1.How can I place an order for SMCJ11A-E3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ11A-E3/9AT 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 SMCJ11A-E3/9AT reliable?
The price and inventory of SMCJ11A-E3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ11A-E3/9AT is usually 5 days.
3.What payment methods are accepted for SMCJ11A-E3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ11A-E3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ11A-E3/9AT?
SMCJ11A-E3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ11A-E3/9AT 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 SMCJ11A-E3/9AT?
For technical support, including SMCJ11A-E3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ11A-E3/9AT requirements.
6.How does Aetrix verify that SMCJ11A-E3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCJ11A-E3/9AT 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 SMCJ11A-E3/9AT meets industry standards.
7.What is the process for return or replacement of SMCJ11A-E3/9AT?
All SMCJ11A-E3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ11A-E3/9AT, 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 SMCJ11A-E3/9AT part is unused and in its original packaging.
Return procedure for SMCJ11A-E3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ11A-E3/9AT Tags
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