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Taiwan Semiconductor Corporation SMDJ11CA
- Part No.:
- SMDJ11CA
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMDJ11CA.pdf
- Description:
- TVS DIODE 11VWM 18.2VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,297
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Product details
Overview
SMDJ11CA from Taiwan Semiconductor is a bidirectional 3000W transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, with a working stand-off voltage of 11 V, breakdown voltage range 12.2–13.5 V at 1 mA, and clamping voltage of 18.2 V at 164.8 A peak pulse current. It protects telecom and industrial circuits against ESD, load-switching transients, and lightning-induced surges.
For engineers reviewing the SMDJ11CA datasheet, SMDJ11CA pinout, SMDJ11CA application, or SMDJ11CA equivalent, key selection criteria include bidirectional clamping capability, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, sub-1 ps response time, 175°C max junction temperature, and DO-214AB mechanical compatibility for automated SMT placement.
Technical Context
The SMDJ11CA is a glass-passivated, single-die, bidirectional TVS diode designed for high-energy transient suppression in DC power rails and signal lines. Its 3000 W peak pulse power rating (1 ms, 10/1000 µs waveform) and 18.2 V clamping voltage at 164.8 A ensure robust protection without device failure under standardized surge events.
It operates across –55°C to +175°C junction temperature range, features 75°C/W junction-to-ambient thermal resistance, and meets J-STD-020 moisture sensitivity level 1. Polarity is marked by cathode band (for unidirectional variants); SMDJ11CA has symmetrical bidirectional behavior with identical electrical specs in both directions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 11 V - Maximum continuous reverse operating voltage before leakage exceeds 1 µA |
| VBR @ IT=1 mA | 12.2–13.5 V - Voltage at which device transitions from high-impedance to low-impedance clamping state |
| VC @ IPPM=164.8 A | 18.2 V - Clamped voltage during 10/1000 µs surge, limiting downstream IC stress |
| PPK | 3000 W - Peak pulse power handling per single 1 ms transient, per Fig.5 waveform |
| TJ max | +175°C - Enables operation in high-temperature industrial enclosures without derating |
| RθJA | 75°C/W - Thermal resistance defining steady-state power dissipation limit (6.5 W at 25°C ambient) |
| Response time | <1.0 ps - Ensures clamping activation before transient energy couples into protected circuitry |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, matte tin-plated leads, UL 94V-0 molding compound, polarity marked by cathode band (not functional in bidirectional SMDJ11CA).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional transient conduction path | No polarity dependency - either terminal serves as input/output for surge current in either direction |
| Case (cathode band marking) | Manufacturing identification only | Band present per DO-214AB outline but electrically irrelevant for SMDJ11CA's bidirectional operation |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures stable VBR tolerance and long-term reliability under repeated surge stress |
| ISO 7637-2 compliance (Pulse 1/2a/2b/3a/3b) | Validated for automotive and industrial supply-line transient immunity testing |
| Moisture sensitivity level 1 | Enables standard SMT reflow without pre-bake, reducing manufacturing overhead |
| RoHS & halogen-free (IEC 61249-2-21) | Meets global environmental compliance requirements for consumer and industrial end equipment |
| Fast response & low clamping ratio | VC/VBR ≈ 1.4 - Minimizes overvoltage exposure to protected ICs during clamping |
Applications
| Industrial Motor Drives | Telecom Power Supplies |
|---|---|
Use Scenario: Protection of 12 V DC bus in PLC I/O modules exposed to inductive kickback from solenoid switching. IC Role / Device Role / Timing Role: Bidirectional TVS placed across rail-to-ground to clamp ±1 kV/50 Ω transients. Use Value: SMDJ11CA clamps to ≤18.2 V within <1 ps, preventing latch-up or gate oxide damage in MOSFET drivers and microcontrollers. | Use Scenario: Input stage surge protection on AC/DC adapter outputs feeding VoIP phone base stations. IC Role / Device Role / Timing Role: Primary rail protector against lightning-induced surges coupled via Ethernet or power lines. Use Value: With 3000 W peak power rating and 164.8 A IPPM, SMDJ11CA absorbs full IEC 61000-4-5 Level 4 surges without degradation. |
| Automotive Body Control Modules | Consumer Audio Amplifiers |
Use Scenario: CAN bus power rail protection in BCMs subjected to ISO 7637-2 Pulse 3b (capacitive discharge). IC Role / Device Role / Timing Role: Bidirectional clamping device across 12 V supply and chassis ground. Use Value: SMDJ11CA's 12.2–13.5 V VBR aligns with 12 V nominal systems, ensuring early turn-on before downstream LDOs or MCUs are overstressed. | Use Scenario: DC bias rail protection in Class D audio amplifiers where fast transients from speaker cable ESD coupling occur. IC Role / Device Role / Timing Role: Low-capacitance TVS placed directly at amplifier IC supply pins. Use Value: Sub-1 ps response ensures clamping occurs before transient propagates through internal gate drivers, avoiding false triggering or output stage damage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC11CA (Littelfuse) | Same DO-214AB package; VBR = 12.2–13.5 V, VC = 19.0 V @ 160 A - 0.8 V higher clamping voltage | Slightly higher clamping increases risk of overvoltage stress on marginally rated downstream ICs | Select when SAC11CA offers better supply chain availability or cost, accepting minor clamping penalty |
| 1.5KE11CA (ON Semiconductor) | Through-hole DO-15 package; same VWM/VBR/VC specs but 1.5 kW rating - 50% lower peak power | Not suitable for 3000 W surge events; requires parallel devices or redesign for equivalent energy handling | Only consider for legacy through-hole designs where board rework is prohibitive and surge severity is confirmed ≤1.5 kW |
Compared with SAC11CA and 1.5KE11CA, the SMDJ11CA delivers superior energy absorption (3000 W vs. 1500 W) in a surface-mount footprint, enabling compact, automated assembly while maintaining tight clamping performance critical for modern 12 V embedded systems.
Availability
SMDJ11CA is available at Aetrix Electronics and suitable for industrial motor drives, telecom power supplies, automotive body control modules, and consumer audio amplifiers requiring stable component supply and consistent surge immunity performance.
Supply support for SMDJ11CA 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, with global distribution and AEC-Q200 qualified product lines.
The SMDJ series was developed specifically for high-reliability, high-energy transient suppression in automotive, industrial, and telecom infrastructure applications-emphasizing rugged packaging, ISO 7637-2 compliance, and automated SMT compatibility.
FAQ
What is the maximum clamping voltage of the SMDJ11CA under a 10/1000 µs surge?
The SMDJ11CA has a maximum clamping voltage (VC) of 18.2 V when subjected to its rated peak pulse current of 164.8 A under the standardized 10/1000 µs waveform. This value is measured per JEDEC test conditions and guarantees that protected circuitry sees no more than 18.2 V during worst-case transient events, making SMDJ11CA suitable for safeguarding 12 V logic and power rails.
Is the SMDJ11CA unidirectional or bidirectional, and how does polarity affect its layout?
The SMDJ11CA is a bidirectional TVS diode, meaning it provides symmetrical clamping in both forward and reverse directions. Unlike unidirectional variants (e.g., SMDJ11A), it has no functional polarity - the cathode band marking on the DO-214AB case is retained for manufacturing consistency but carries no electrical significance. Layout requires no orientation alignment, simplifying PCB design and automated placement.
Does the SMDJ11CA meet automotive transient immunity standards?
Yes, the SMDJ11CA meets ISO 7637-2 requirements for Pulse 1, 2a, 2b, 3a, and 3b, making it suitable for automotive body electronics, infotainment power supplies, and BCM applications. Its 3000 W peak power rating and 175°C junction temperature rating further support deployment in under-hood and dashboard environments where thermal and electrical stress are elevated.
What is the thermal resistance and steady-state power dissipation capability of the SMDJ11CA?
The SMDJ11CA has a junction-to-ambient thermal resistance (RθJA) of 75°C/W and a steady-state power dissipation (PD) of 6.5 W at 25°C ambient. This means it can continuously dissipate up to 6.5 W with appropriate PCB copper area and airflow; above 25°C, derating follows the curve in Figure 2 of the datasheet. The RθJA value confirms suitability for compact layouts with moderate thermal management.
How does the SMDJ11CA compare to the SMDJ10CA in terms of voltage ratings and system-level protection?
The SMDJ11CA has a higher working stand-off voltage (11 V vs. 10 V) and breakdown voltage (12.2–13.5 V vs. 11.1–12.3 V) than the SMDJ10CA, offering tighter margin against nuisance tripping on 12 V nominal rails with ripple. Its clamping voltage (18.2 V) remains well below typical 20 V absolute maximum ratings of protected ICs, whereas SMDJ10CA clamps at 17.0 V - a 1.2 V difference that may influence system-level overvoltage margin analysis. Both share identical package, power rating, and response time.
SMDJ11CA 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:
- -
- Bidirectional Channels:
- 1
- 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 ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
SMDJ11CA FAQ
1.How can I place an order for SMDJ11CA through Aetrix?
Please submit a Request for Quotation (RFQ) for SMDJ11CA 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 SMDJ11CA reliable?
The price and inventory of SMDJ11CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMDJ11CA is usually 5 days.
3.What payment methods are accepted for SMDJ11CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMDJ11CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMDJ11CA?
SMDJ11CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMDJ11CA 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 SMDJ11CA?
For technical support, including SMDJ11CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMDJ11CA requirements.
6.How does Aetrix verify that SMDJ11CA is sourced from the original manufacturer or authorized distributors?
All SMDJ11CA 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 SMDJ11CA meets industry standards.
7.What is the process for return or replacement of SMDJ11CA?
All SMDJ11CA units undergo pre-shipment inspection (PSI). If there is an issue with SMDJ11CA, 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 SMDJ11CA part is unused and in its original packaging.
Return procedure for SMDJ11CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMDJ11CA Tags
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