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Taiwan Semiconductor Corporation 1.5SMC11A
- Part No.:
- 1.5SMC11A
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
1.5SMC11A.pdf
- Description:
- 1500W, 11V, 5%, UNIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:7,451
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Product details
Overview
1.5SMC11A from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, rated for 1500W peak pulse power, 10.5–11.6V breakdown voltage at 1mA test current, and 15.6V maximum clamping voltage at 100A peak impulse current. It protects DC power rails and signal lines in telecom interfaces against ESD, lightning-induced surges, and load-switch transients.
For engineers reviewing the 1.5SMC11A datasheet, 1.5SMC11A pinout, 1.5SMC11A application, or 1.5SMC11A equivalent, key selection criteria include working stand-off voltage (9.40V), leakage current (<1µA at VWM), clamping ratio (VC/VBR ≈ 1.43), thermal resistance (RθJA = 50°C/W), and compliance with ISO 7637-2 Pulse 1/2a/2b/3a/3b.
Technical Context
The 1.5SMC11A operates as a unidirectional avalanche diode, leveraging glass-passivated junction technology for stable breakdown behavior and low leakage. Its fast response time (<1.0ps) enables suppression of sub-nanosecond ESD events per IEC 61000-4-2, while its 150°C maximum junction temperature supports operation in industrial ambient environments up to 125°C with derating.
Designed for single-die configuration in DO-214AB, it delivers 1500W peak pulse power under 10/1000μs waveform per Fig.5, with clamping performance validated at 100A IPPM. Thermal performance is characterized by RθJC = 15°C/W and RθJA = 50°C/W, enabling reliable power dissipation in compact PCB layouts without forced airflow.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR min/max | 10.5V / 11.6V at IT = 1mA - defines precise avalanche initiation window for predictable turn-on during overvoltage events |
| VWM | 9.40V - maximum continuous reverse operating voltage before significant leakage begins; sets safe margin below VBR |
| VC @ IPPM | 15.6V at IPPM = 100A - clamped voltage seen by protected circuit during worst-case 1500W surge, limiting stress on downstream ICs |
| PPK | 1500W - peak pulse power handling per 10/1000μs waveform, enabling robust protection against automotive load dump and lightning surges |
| IR @ VWM | <1µA - ultra-low reverse leakage ensures minimal standby power loss and no signal integrity impact on high-impedance nodes |
| TJ max | +150°C - allows sustained operation in under-hood or enclosed industrial enclosures with limited airflow |
| RθJA | 50°C/W - quantifies thermal bottleneck from junction to ambient; requires ≥ 100mm² copper pour for full 1500W capability at TA = 25°C |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, unidirectional configuration with cathode band marking. Case meets UL 94V-0 flammability rating; matte tin-plated leads comply with J-STD-002 solderability and JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference node | Connected to ground or low-voltage rail; forms return path during clamping; polarity must match PCB silkscreen cathode band |
| Cathode | Protected line input | Connected to line being protected (e.g., +12V rail); conducts avalanche current to anode when VAK exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR over temperature and lifetime, with <0.075%/°C tempco and <5% parametric drift after 1000 surge cycles |
| ISO 7637-2 compliance | Validated for Pulse 1 (inductive load disconnect), Pulse 2a/2b (switching transients), and Pulse 3a/3b (capacitive coupling), meeting automotive EMC requirements |
| Moisture sensitivity level 1 | Enables standard SMT reflow without baking; eliminates moisture-related popcorning risk during assembly |
| RoHS & halogen-free | Complies with IEC 61249-2-21 and EU RoHS Directive 2011/65/EU; suitable for green manufacturing and export-controlled applications |
| Fast response <1.0ps | Responds before ESD event reaches peak voltage, preventing latch-up or gate oxide damage in CMOS interfaces |
Applications
| Telecom Line Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting RS-485 transceiver inputs against induced surges on long cable runs in factory automation networks. IC Role / Device Role: Unidirectional TVS placed between A/B differential lines and ground to clamp common-mode transients up to ±1kV. Use Value: Limits clamped voltage to ≤15.6V, keeping transceiver inputs within absolute maximum ratings while maintaining signal integrity via low capacitance (<100pF). | Use Scenario: Safeguarding 24V DC sensor inputs on programmable logic controller (PLC) modules exposed to relay coil flyback and motor drive noise. IC Role / Device Role: Standoff protection on each 24V input channel, absorbing repetitive 1500W pulses without degradation. Use Value: Withstands >1000 surges at rated PPK and maintains VBR stability across -55°C to +150°C, ensuring field reliability in harsh environments. |
| Automotive Body Control Module | Consumer Power Adapter Input |
Use Scenario: Suppressing load dump transients on 12V supply lines feeding microcontrollers and CAN transceivers in body control units. IC Role / Device Role: Primary clamping device on main 12V rail, coordinated with upstream fuse and downstream LC filter. Use Value: Meets ISO 7637-2 Pulse 5a (load dump) with 15.6V clamping, preventing brownout resets and overvoltage damage during alternator regulation failure. | Use Scenario: Protecting AC-DC adapter primary-side rectifier output from surge events caused by mains switching or nearby lightning strikes. IC Role / Device Role: Secondary-side TVS on DC output rail (e.g., 12V or 19V), placed after bulk capacitor to absorb residual transients. Use Value: Low IR (<1µA) avoids loading regulated output; DO-214AB footprint enables automated placement alongside electrolytic capacitors and DC jacks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ11A | Same VBR (10.5–11.6V), lower PPK (600W), SMB package (smaller footprint, higher RθJA = 65°C/W) | Limited to lower-energy surges; unsuitable for ISO 7637-2 Pulse 5a or lightning-level threats | Select when board space is constrained and surge energy is capped at 600W; verify thermal margin with reduced copper area |
| 1.5KE11A | Same electrical specs but axial DO-15 through-hole package; 1500W rating, identical VBR/VC, but manual assembly required | Not compatible with automated SMT lines; higher profile limits use in low-height enclosures | Choose only for legacy through-hole designs or prototyping where reflow compatibility is not required |
Compared with SMBJ11A and 1.5KE11A, the 1.5SMC11A uniquely balances 1500W surge capacity, SMT manufacturability, and thermal performance (RθJA = 50°C/W) in a surface-mount DO-214AB package-making it optimal for high-reliability automotive and industrial power rail protection where both energy handling and assembly scalability matter.
Availability
1.5SMC11A is available at Aetrix Electronics and suitable for telecom line protection, industrial PLC I/O safeguarding, automotive body control modules, and consumer power adapter input stages requiring stable component supply and repeatable surge immunity performance.
Supply support for 1.5SMC11A 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 ISO 9001 and IATF 16949 certified facilities.
The 1.5SMCxx(A) series is engineered for high-energy transient suppression in automotive, industrial, and telecom infrastructure-delivering consistent 1500W clamping performance across 6.8V–200V variants in standardized SMC packaging.
FAQ
What is the polarity configuration of the 1.5SMC11A?
The 1.5SMC11A is a unidirectional TVS diode, configured with cathode band marking indicating the cathode terminal. It conducts avalanche current only when the cathode is at a higher potential than the anode-making it suitable for DC rail protection where polarity is fixed. Bidirectional variants require "C" or "CA" suffixes (e.g., 1.5SMC11CA), which are distinct part numbers.
Does the 1.5SMC11A meet automotive EMC standards?
Yes, the 1.5SMC11A meets ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b requirements for transient immunity in 12V automotive systems. Its 15.6V clamping voltage at 100A and 1500W peak power rating enable compliance with load dump (Pulse 5a) when used with appropriate system-level filtering-verified per TSC's characterization data in Version S2207.
What is the maximum steady-state power dissipation for the 1.5SMC11A?
The 1.5SMC11A has a steady-state power dissipation (PD) rating of 6.5W at TA = 25°C. This value applies only to continuous DC or low-frequency conditions-not surge events. In practice, PD is rarely approached in TVS applications; thermal design focuses instead on pulse derating using Fig.2 from the datasheet, where RθJA = 50°C/W governs junction temperature rise during transient conduction.
How does the 1.5SMC11A compare to the 1.5SMC11 in terms of clamping performance?
The 1.5SMC11A offers tighter VBR tolerance (10.5–11.6V vs. 9.9–12.1V for 1.5SMC11) and lower clamping voltage (15.6V vs. 16.2V at 100A), resulting in improved protection margin for sensitive 12V logic. Both share identical package, PPK, and thermal specs-but the "A" suffix denotes enhanced parameter grading for critical applications demanding tighter VBR control and lower VC.
Is the 1.5SMC11A suitable for protecting high-speed data lines like USB or HDMI?
No-the 1.5SMC11A is not optimized for high-speed data line protection due to its relatively high junction capacitance (typically >100pF at VR = 0V, inferred from family curves) and unidirectional architecture. For USB 2.0/3.0 or HDMI, low-capacitance bidirectional TVS arrays (e.g., TPD4E001 or SP1001) with sub-1pF capacitance are recommended. The 1.5SMC11A is intended for power rail and low-frequency signal line protection only.
1.5SMC11A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AB, SMC
- Series:
- 1.5SMC
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 9.4V
- Voltage - Breakdown (Min):
- 10.5V
- Voltage - Clamping (Max) @ Ipp:
- 15.6V
- Current - Peak Pulse (10/1000µs):
- 100A
- Power - Peak Pulse:
- 1500W (1.5kW)
- 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)
1.5SMC11A FAQ
1.How can I place an order for 1.5SMC11A through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5SMC11A 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 1.5SMC11A reliable?
The price and inventory of 1.5SMC11A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5SMC11A is usually 5 days.
3.What payment methods are accepted for 1.5SMC11A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5SMC11A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5SMC11A?
1.5SMC11A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5SMC11A 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 1.5SMC11A?
For technical support, including 1.5SMC11A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5SMC11A requirements.
6.How does Aetrix verify that 1.5SMC11A is sourced from the original manufacturer or authorized distributors?
All 1.5SMC11A 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 1.5SMC11A meets industry standards.
7.What is the process for return or replacement of 1.5SMC11A?
All 1.5SMC11A units undergo pre-shipment inspection (PSI). If there is an issue with 1.5SMC11A, 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 1.5SMC11A part is unused and in its original packaging.
Return procedure for 1.5SMC11A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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