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Vishay General Semiconductor - Diodes Division SMA6J11A-E3/5A
- Part No.:
- SMA6J11A-E3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA6J11A-E3/5A.pdf
- Description:
- TVS DIODE 11VWM 21.5VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:9,698
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Product details
Overview
SMA6J11A-E3/5A from Vishay General Semiconductor is a unidirectional surface-mount TransZORB® transient voltage suppressor in SMA (DO-214AC) package, with 11 V stand-off voltage (VWM), 12.2–13.5 V breakdown voltage (VBR at IT = 1 mA), 17.2 V max clamping voltage (VC at IPP = 34.8 A, 10/1000 µs), 600 W peak pulse power (10/1000 µs), and 50 A peak forward surge current - used to protect MOSFETs and signal lines in industrial sensor units against inductive switching transients.
For engineers reviewing the SMA6J11A-E3/5A datasheet, SMA6J11A-E3/5A pinout, SMA6J11A-E3/5A application, or SMA6J11A-E3/5A equivalent, key selection criteria include clamping voltage margin vs. protected IC's absolute maximum rating, thermal resistance (RθJA = 120 °C/W), unidirectional polarity requirement, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This device operates as a silicon avalanche diode optimized for transient suppression in DC power rails and low-speed signal paths. Its unidirectional configuration provides reverse-biased clamping only, with forward conduction limited to 3.5 V at 25 A (300 µs pulse). The dynamic resistance (RD = 0.107 Ω) directly determines clamping voltage rise under surge current per VCL = RD × IPP + VBRmax.
Thermal performance is defined by RθJA = 120 °C/W (on standard PCB pads) and RθJL = 25 °C/W, enabling operation up to TJ = 150 °C. Derating above TA = 25 °C follows Fig. 2, and leakage current remains ≤1 µA at VWM = 11 V, ensuring minimal standby power loss in battery-powered sensor interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 11 V - maximum continuous reverse voltage before significant leakage; sets upper limit for protected circuit's operating rail. |
| VBR min/max | 12.2 V / 13.5 V at IT = 1 mA - defines guaranteed avalanche initiation range; used to calculate worst-case clamping. |
| VC @ IPP | 17.2 V at 34.8 A (10/1000 µs) - peak clamped voltage seen by downstream IC during standard surge event. |
| PPPM (10/1000 µs) | 600 W - energy-handling capacity for long-duration transients like inductive kickback. |
| IFSM | 50 A - surge current tolerance in forward direction; relevant for fault conditions or bidirectional system miswiring. |
| TJ max | +150 °C - maximum junction temperature; requires thermal design using RθJA = 120 °C/W on specified pad layout. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, unidirectional polarity indicated by cathode band. Matte tin-plated leads, RoHS-compliant (E3 suffix), MSL level 1, LF peak 260 °C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / transient return path | Connected to ground or low-impedance return in unidirectional TVS configuration; must handle 50 A IFSM surges. |
| Cathode | Clamping node / protected line connection | Connected to line being protected (e.g., sensor VDD); clamps to ≤17.2 V when transient exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| Low-profile SMA package | Enables high-density PCB layouts and compatibility with standard SMT pick-and-place equipment. |
| MSL Level 1 rating | Allows unlimited floor life and reflow at 260 °C peak without baking, simplifying manufacturing flow. |
| Clamping ratio VC/VBR | 1.39 (17.2 V / 12.2 V) - tight ratio ensures predictable overvoltage limiting with minimal margin overhead. |
| Leakage current ≤1 µA at VWM | Minimizes quiescent power draw in always-on sensor nodes and extends battery life. |
Applications
| Industrial Sensor Protection | Automotive Body Control Module |
|---|---|
Use Scenario: Protecting 12 V supply rail of an industrial temperature sensor exposed to relay coil de-energization spikes. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VDD and GND, clamping transients before they reach the sensor's LDO and ADC. Use Value: Limits voltage excursion to ≤17.2 V, staying below the 20 V absolute maximum rating of typical industrial-grade analog front-end ICs. | Use Scenario: Safeguarding LIN bus signal line (12 V nominal) in door module against load dump and ESD events. IC Role / Device Role / Timing Role: TVS connected between LIN line and chassis ground, suppressing 8/20 µs ESD and 10/1000 µs load dump surges. Use Value: With 4000 W PPPM (8/20 µs), it absorbs automotive-level ESD pulses without degradation, preserving signal integrity. |
| Consumer Appliance Motor Drive | Telecom Power Interface |
Use Scenario: Shielding microcontroller I/O pins driving small DC motors in smart home appliances. IC Role / Device Role / Timing Role: Discrete TVS on motor driver output traces, shunting inductive flyback energy away from MCU GPIOs. Use Value: 50 A IFSM rating withstands repeated motor stall currents, while 17.2 V clamping prevents GPIO latch-up. | Use Scenario: Protecting 12 V DC input of PoE-powered telecom gateway against lightning-induced surges on outdoor wiring. IC Role / Device Role / Timing Role: Primary-stage TVS on DC input rail upstream of DC/DC converter, absorbing bulk surge energy. Use Value: 600 W (10/1000 µs) rating handles sustained inductive transients from nearby lightning strikes on building infrastructure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA6J11CA-E3/5A | Bidirectional version; symmetric clamping for AC-coupled or floating lines; VBR = 12.2–13.5 V, VC = 19.9 V @ 30.1 A. | Required where line polarity reverses or differential signals need protection on both polarities. | Select SMA6J11CA-E3/5A only if bidirectional clamping is explicitly needed; SMA6J11A-E3/5A is optimal for DC rails with fixed polarity. |
| 1.5KE11A | Through-hole DO-201 package; same VWM/VBR/VC specs but higher RθJA (~65 °C/W), lower IFSM (40 A), and no MSL-1 rating. | Suitable for prototyping or legacy through-hole designs; not recommended for high-volume SMT production. | Choose SMA6J11A-E3/5A for automated assembly, thermal reliability on PCB, and industrial-grade process compliance. |
Compared with SMA6J11CA-E3/5A and 1.5KE11A, the SMA6J11A-E3/5A offers superior manufacturability (MSL-1, SMT-compatible), tighter clamping (17.2 V vs. 19.9 V), and better thermal performance on standard pads - making it the preferred choice for new industrial and automotive PCB designs requiring unidirectional DC rail protection.
Availability
SMA6J11A-E3/5A is available at Aetrix Electronics and suitable for industrial sensor units, automotive body control modules, and consumer appliance motor drives requiring stable component supply, RoHS-compliant packaging, and automated SMT placement support.
Supply support for SMA6J11A-E3/5A 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 devices, and optoelectronics with emphasis on reliability and application-specific performance.
The SMA6JxxA series is designed specifically for robust, surface-mount transient suppression in harsh environments - targeting industrial automation, automotive subsystems, and telecom infrastructure where high-energy surge immunity and manufacturing scalability are critical.
FAQ
What is the maximum clamping voltage of the SMA6J11A-E3/5A under a 10/1000 µs surge?
The SMA6J11A-E3/5A has a maximum clamping voltage (VC) of 17.2 V when subjected to a 10/1000 µs waveform at its rated peak pulse current of 34.8 A. This value is measured per the test conditions specified in the Vishay datasheet (Document Number: 89460), with the device mounted on 5.0 mm × 5.0 mm copper pads. The SMA6J11A-E3/5A maintains this clamping performance across its operational temperature range.
Is the SMA6J11A-E3/5A suitable for protecting a 12 V automotive circuit?
Yes, the SMA6J11A-E3/5A is suitable for 12 V automotive circuits such as body control modules, provided the protected IC's absolute maximum voltage rating exceeds 17.2 V. Its 11 V stand-off voltage (VWM) aligns with nominal 12 V systems, and its 4000 W peak pulse power rating (8/20 µs) meets common automotive ESD and load-dump immunity requirements. The SMA6J11A-E3/5A is rated for TJ = 150 °C and qualified to MSL level 1, supporting under-hood thermal and manufacturing demands.
Does the SMA6J11A-E3/5A have bidirectional capability?
No, the SMA6J11A-E3/5A is strictly unidirectional. It clamps only in reverse bias (cathode positive relative to anode) and conducts forward current up to 50 A (IFSM). For bidirectional protection - such as on AC-coupled or floating signal lines - the SMA6J11CA-E3/5A variant must be used. The "A" suffix in SMA6J11A-E3/5A explicitly denotes unidirectional polarity, confirmed in the Vishay datasheet section "FEATURES" and "Polarity: color band denotes cathode end".
What is the thermal resistance of the SMA6J11A-E3/5A, and how does it affect PCB layout?
The SMA6J11A-E3/5A has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on the minimum recommended pad layout: 5.0 mm × 5.0 mm copper pads per terminal. This value assumes no additional heatsinking. To maintain TJ ≤ 150 °C at full 4 W steady-state dissipation (PD at TA = 50 °C), the PCB must provide adequate copper area and airflow. Reducing pad size or omitting thermal vias will increase RθJA and risk thermal runaway during repeated surge events. The SMA6J11A-E3/5A datasheet specifies this layout in "MECHANICAL DATA".
How does the leakage current of the SMA6J11A-E3/5A impact low-power sensor applications?
The SMA6J11A-E3/5A exhibits ≤1 µA reverse leakage current at its 11 V stand-off voltage (VWM), measured at TA = 25 °C. This ultra-low leakage ensures negligible impact on battery life in always-on industrial sensors - for example, adding less than 0.01 mAh per day to a 10 µA sleep-mode system. Leakage remains within specification up to 85 °C, per the "ELECTRICAL CHARACTERISTICS" table, making the SMA6J11A-E3/5A appropriate for extended outdoor deployments where ambient temperature varies widely.
SMA6J11A-E3/5A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- 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:
- 21.5V
- Current - Peak Pulse (10/1000µs):
- 172A (8/20µs)
- Power - Peak Pulse:
- 4000W (4kW)
- 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-214AC (SMA)
SMA6J11A-E3/5A FAQ
1.How can I place an order for SMA6J11A-E3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA6J11A-E3/5A 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 SMA6J11A-E3/5A reliable?
The price and inventory of SMA6J11A-E3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA6J11A-E3/5A is usually 5 days.
3.What payment methods are accepted for SMA6J11A-E3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA6J11A-E3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA6J11A-E3/5A?
SMA6J11A-E3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA6J11A-E3/5A 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 SMA6J11A-E3/5A?
For technical support, including SMA6J11A-E3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA6J11A-E3/5A requirements.
6.How does Aetrix verify that SMA6J11A-E3/5A is sourced from the original manufacturer or authorized distributors?
All SMA6J11A-E3/5A 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 SMA6J11A-E3/5A meets industry standards.
7.What is the process for return or replacement of SMA6J11A-E3/5A?
All SMA6J11A-E3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMA6J11A-E3/5A, 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 SMA6J11A-E3/5A part is unused and in its original packaging.
Return procedure for SMA6J11A-E3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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