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Taiwan Semiconductor Corporation SMDJ11A
- Part No.:
- SMDJ11A
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMDJ11A.pdf
- Description:
- TVS DIODE 11VWM 18.2VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,747
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Product details
Overview
SMDJ11A from Taiwan Semiconductor is a unidirectional 3000W surface-mount transient voltage suppressor (TVS) diode with a 11V working stand-off voltage (VWM), 12.2–13.5V breakdown voltage (VBR), and 18.2V maximum clamping voltage (VC) at 164.8A peak pulse current. It is designed for primary-level surge protection in DC power rails and signal lines of industrial control systems, telecom interfaces, and automotive ECUs.
For engineers reviewing the SMDJ11A datasheet, SMDJ11A pinout, SMDJ11A application, or SMDJ11A equivalent, key selection criteria include clamping performance under ISO 7637-2 Pulse 1/2a/2b/3a/3b, DO-214AB (SMC) package compatibility, junction temperature range (−55°C to +175°C), and unidirectional polarity marking.
Technical Context
The SMDJ11A operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its specified VBR (12.2–13.5V @ 1mA). Its glass-passivated junction ensures stable breakdown characteristics and fast response (<1.0ps), enabling effective suppression of ESD and lightning-induced transients per IEC 61000-4-2 and ISO 7637-2.
Thermally, it features RθJA = 75°C/W and RθJL = 15°C/W, supporting sustained operation up to TJ = 175°C. Its 3000W peak pulse power rating (tp = 1ms, 10/1000μs waveform) and 6.5W steady-state dissipation define its robustness in high-energy surge environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 11 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 12.2 V / 13.5 V @ 1 mA - Confirmed avalanche onset range for reliable trigger threshold |
| VC @ IPPM | 18.2 V @ 164.8 A - Clamped voltage during full 3000W transient, limiting downstream stress |
| PPK | 3000 W - Peak pulse power handling per 10/1000μs waveform, per Fig.5 |
| TJ max | +175 °C - Maximum junction temperature, enabling use in under-hood or enclosed industrial enclosures |
| IR @ VWM | 1 µA - Low leakage ensures minimal standby power loss in always-on circuits |
| Package | DO-214AB (SMC) - Standardized surface-mount outline with 7.11 mm x 6.22 mm footprint and cathode band marking |
Pinout & Package
DO-214AB (SMC) package: molded plastic case with matte tin-plated leads, polarity indicated by cathode band on one end. Weight ≈ 0.290 g. Complies with UL 94V-0 and JESD201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., GND or return path) in unidirectional configuration |
| Cathode | Reverse-biased clamping terminal | Connected to protected line (e.g., 12V 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 thermal cycling |
| ISO 7637-2 compliance | Validated for automotive load-dump and switching transient immunity (Pulse 1/2a/2b/3a/3b) |
| Fast response time | <1.0 ps - Limits voltage overshoot before clamping engages |
| Moisture sensitivity level | MSL Level 1 - No bake requirement prior to reflow, compatible with standard SMT assembly |
| RoHS & halogen-free | Complies with IEC 61249-2-21 and EU RoHS Directive 2011/65/EU |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
Use Scenario: Protection of 24V DC input stage against load dump and inductive kickback from solenoids and relays. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VIN and GND, clamping transients before they reach DC-DC converters and microcontrollers. Use Value: Limits peak voltage to ≤18.2V during 3000W surges, preventing latch-up or gate oxide damage in downstream ICs. | Use Scenario: Surge suppression on LIN bus or sensor supply lines exposed to battery transients and ESD. IC Role / Device Role / Timing Role: Standoff-rated TVS on 12V auxiliary rail, activated only during overvoltage events >11V. Use Value: Maintains <1 µA leakage at 11V, avoiding interference with low-current sensor biasing while delivering sub-ns response. |
| Telecom Power Feeds | Renewable Energy Inverters |
Use Scenario: Input protection for PoE-powered equipment subjected to lightning-induced surges on Ethernet pairs. IC Role / Device Role / Timing Role: Primary-stage TVS on DC input derived from midspan PSE, coordinated with secondary-stage MOVs. Use Value: 18.2V clamping enables safe interface with 12V-rated PHY ICs without derating margin loss. | Use Scenario: DC-link surge protection in solar charge controllers exposed to grid-switching transients. IC Role / Device Role / Timing Role: Unidirectional clamp on PV input rail, absorbing repetitive 10/1000μs pulses from nearby lightning strikes. Use Value: 175°C max junction temperature supports operation in sealed outdoor enclosures with limited airflow. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC11A (Littelfuse) | Same DO-214AB package; VBR = 12.2–13.5V, VC = 18.2V, but rated for 2500W (not 3000W) | Lower peak power limits suitability in high-energy automotive load-dump scenarios | Select SMDJ11A where full 3000W capability per ISO 7637-2 Pulse 5a is required |
| P6SMB11A (ON Semiconductor) | DO-214AA (SMB) package (smaller footprint); identical VWM/VBR/VC specs but lower PPK = 600W | Not suitable for 3000W surge events; intended for lower-energy ESD-only protection | Choose SMDJ11A when board layout allows DO-214AB and system-level surge testing demands 3000W rating |
Compared with SAC11A and P6SMB11A, the SMDJ11A delivers higher peak power headroom (3000W vs. 2500W/600W) in the same mechanical form factor as SAC11A but with larger thermal mass than P6SMB11A-making it optimal for industrial and automotive applications requiring validated ISO 7637-2 immunity.
Availability
SMDJ11A is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, and telecom power feeds requiring stable component supply, traceable sourcing, and long-lifecycle availability.
Supply support for SMDJ11A 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
Taiwan Semiconductor Corporation (TSC) is a vertically integrated semiconductor manufacturer specializing in discrete power devices, TVS diodes, rectifiers, and MOSFETs for industrial and automotive markets.
The SMDJ11A belongs to TSC's high-power surface-mount TVS family, engineered specifically for robust transient immunity in harsh environments where ISO 7637-2 and IEC 61000-4-5 compliance is mandatory.
FAQ
What is the maximum clamping voltage of the SMDJ11A under full-rated surge conditions?
The SMDJ11A exhibits a maximum clamping voltage (VC) of 18.2 V when subjected to its peak pulse current (IPPM) of 164.8 A, corresponding to its full 3000W rating under the standardized 10/1000μs waveform. This value is measured per test condition defined in the datasheet and ensures predictable voltage limiting during surge events.
Is the SMDJ11A suitable for bidirectional transient protection?
No, the SMDJ11A is a unidirectional TVS diode. For bidirectional protection, the SMDJ11CA variant must be used. The SMDJ11A has polarity marking (cathode band) and conducts only in reverse breakdown; forward conduction is not rated for surge suppression.
What is the junction-to-ambient thermal resistance (RθJA) of the SMDJ11A?
The SMDJ11A has a typical junction-to-ambient thermal resistance (RθJA) of 75°C/W under standard JEDEC PCB mounting conditions (2s2p copper). This value informs thermal design margins when estimating steady-state temperature rise under continuous power dissipation up to 6.5W.
Does the SMDJ11A meet automotive surge immunity standards?
Yes, the SMDJ11A meets ISO 7637-2 requirements for Pulse 1, 2a, 2b, 3a, and 3b, making it suitable for automotive electronic control units, body electronics, and infotainment systems where load-dump and switching transient immunity is mandated.
What is the moisture sensitivity level (MSL) rating for the SMDJ11A?
The SMDJ11A is rated MSL Level 1 per J-STD-020, meaning it may be stored indefinitely at ambient conditions and requires no pre-reflow baking-fully compatible with standard automated SMT assembly processes without special handling.
SMDJ11A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AB, SMC
- Series:
- SMDJ
- 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):
- 164.8A
- Power - Peak Pulse:
- 3000W (3kW)
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
SMDJ11A FAQ
1.How can I place an order for SMDJ11A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMDJ11A 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 SMDJ11A reliable?
The price and inventory of SMDJ11A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMDJ11A is usually 5 days.
3.What payment methods are accepted for SMDJ11A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMDJ11A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMDJ11A?
SMDJ11A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMDJ11A 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 SMDJ11A?
For technical support, including SMDJ11A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMDJ11A requirements.
6.How does Aetrix verify that SMDJ11A is sourced from the original manufacturer or authorized distributors?
All SMDJ11A 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 SMDJ11A meets industry standards.
7.What is the process for return or replacement of SMDJ11A?
All SMDJ11A units undergo pre-shipment inspection (PSI). If there is an issue with SMDJ11A, 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 SMDJ11A part is unused and in its original packaging.
Return procedure for SMDJ11A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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