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Taiwan Semiconductor Corporation 1.5KE11CA
- Part No.:
- 1.5KE11CA
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE11CA.pdf
- Description:
- TVS 1500W 11.1V 5% BIDIR DO-201
- Quantity:
- Payment:
- Shipping:
Inventory:4,942
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Product details
Overview
1.5KE11CA from Taiwan Semiconductor is a bidirectional 1500W transient voltage suppressor (TVS) diode in DO-201 package, designed for high-energy surge protection in automotive and industrial power rails. It features a nominal breakdown voltage of 11V, clamping voltage of 16.2V at 1A peak impulse current, working stand-off voltage of 8.92V, and meets ISO 7637-2 Pulse 1/2a/2b/3a/3b immunity requirements.
For engineers reviewing the 1.5KE11CA datasheet, 1.5KE11CA pinout, 1.5KE11CA application, or 1.5KE11CA equivalent, this device serves as a robust, AEC-Q101-qualified solution for protecting sensitive electronics against ESD, inductive switching transients, and electrical fast transients in 12V/24V systems - with verified clamping performance, low dynamic impedance, and sub-nanosecond response time.
Technical Context
The 1.5KE11CA operates as a bidirectional avalanche diode, symmetrically clamping voltage surges above ±11V in both polarities. Its 1500W peak pulse power rating (10/1000μs waveform), 16.2V maximum clamping voltage at 1A IPP, and ≤1μA leakage at 8.92V ensure reliable overvoltage suppression without false triggering during normal operation.
Designed for harsh environments, it supports junction temperatures from –55°C to +175°C, complies with AEC-Q101 stress testing, and meets RoHS and halogen-free standards per IEC 61249-2-21. Its DO-201 package enables through-hole mounting on PCBs with copper pad thermal management per JESD 201 Class 2 whisker resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 9.90V / 12.1V - Ensures consistent avalanche initiation across production units at 1mA test current |
| VWM | 8.92V - Maximum continuous reverse operating voltage before leakage exceeds 1μA |
| VC @ IPP=1A | 16.2V - Clamped voltage during 10/1000μs surge, limiting downstream IC stress to safe levels |
| PPK | 1500W - Peak surge energy handling capability under standardized 10/1000μs waveform |
| IPP max | 1A - Maximum non-repetitive peak impulse current supported at rated clamping voltage |
| TJ max | +175°C - Enables operation in under-hood automotive or high-ambient industrial environments |
| Response time | <5.0ns - Bidirectional turn-on speed ensures effective suppression of fast EFT and ESD events |
Pinout & Package
DO-201 axial-leaded package with cathode band marking for unidirectional variants; 1.5KE11CA is bidirectional and marked with polarity-indifferent coding (no cathode band). Leads are pure tin-plated, solderable per J-STD-002, and meet UL 94V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Lead 1) | Surge input terminal (bidirectional) | Accepts positive or negative transients; symmetrical conduction relative to cathode |
| Cathode (Lead 2) | Surge input terminal (bidirectional) | Functions identically to anode in CA-series devices; no polarity dependence in circuit layout |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and mechanical shock |
| ISO 7637-2 compliance | Withstands Pulse 1 (inductive load dump), Pulse 2a/2b (battery disconnect), and Pulse 3a/3b (EFT) waveforms |
| Low dynamic impedance | Enables tight clamping margin between VBR and VC, minimizing protected circuit overvoltage exposure |
| Halogen-free construction | Meets IEC 61249-2-21, supporting environmentally compliant manufacturing and end-of-life processing |
| 10/1000μs surge rating | Rated for 1500W single-event surge per JEDEC standard, enabling use in 12V/24V power rail protection |
Applications
| Automotive Power Rail Protection | Industrial PLC Input Protection |
|---|---|
|
Use Scenario: Protecting CAN/LIN bus transceivers and microcontrollers from load dump and alternator ripple in 12V vehicle electrical systems. IC Role / Device Role: Primary bidirectional surge clamp placed across power supply pins upstream of DC-DC converters. Use Value: Limits transient voltage to ≤16.2V during ISO 7637-2 Pulse 2b (100V/2Ω), preventing latch-up or gate oxide damage in 3.3V/5V logic. |
Use Scenario: Shielding digital input modules from inductive kickback when switching solenoids or contactors in factory automation. IC Role / Device Role: Parallel-connected TVS on 24V sensor input lines to absorb stored magnetic energy during coil de-energization. Use Value: Clamps 100V+ transients to 16.2V within 5ns, preserving signal integrity and avoiding false triggering of optocouplers or Schmitt triggers. |
| LED Driver Overvoltage Suppression | ESD-Prone Communication Interface Protection |
|
Use Scenario: Safeguarding constant-current LED drivers in streetlighting against lightning-induced surges on AC mains or DC bus lines. IC Role / Device Role: Secondary-level clamping device placed after primary MOVs to handle residual fast-rising transients. Use Value: Withstands 1500W surges while maintaining <1μA leakage at 8.92V, ensuring zero standby power loss and long-term reliability. |
Use Scenario: Adding robustness to RS-485 or CAN FD transceiver ports exposed to human-body-model (HBM) ESD in field-deployed equipment. IC Role / Device Role: Low-capacitance (<50pF typical) bidirectional clamp integrated into I/O protection network near connector. Use Value: Responds in <5ns to ±8kV HBM events, limiting voltage excursion to 16.2V and preventing transceiver latch-up or permanent failure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ11CA (Bourns) | 600W rating, DO-214AA package, lower clamping voltage (18.2V @ 33.6A), higher IPP but lower PPK | Better suited for space-constrained PCBs; requires derating for 1500W surge events | Select SMBJ11CA only when board area is critical and surge energy is ≤600W; verify thermal dissipation with copper pour |
| SMCJ11CA (Littelfuse) | 1500W rating, DO-214AB package, identical VBR/VC specs, but AEC-Q101 not guaranteed across all lots | Compatible for industrial use; automotive qualification requires lot-specific validation | Choose SMCJ11CA for cost-sensitive industrial designs where full AEC-Q101 traceability is not mandated |
Compared with 1.5KE11CA, SMBJ11CA offers smaller footprint but insufficient single-pulse energy handling for ISO 7637-2 Pulse 1, while SMCJ11CA matches power rating but lacks guaranteed AEC-Q101 compliance - making 1.5KE11CA the preferred choice for automotive-critical 12V rail protection requiring certified reliability.
Availability
1.5KE11CA is available at Aetrix Electronics and suitable for automotive infotainment power supplies, industrial programmable logic controller (PLC) inputs, LED driver front-end protection, and RS-485/CAN interface circuits requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for 1.5KE11CA 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 analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, specializing in TVS diodes, rectifiers, and power management components since 1979.
The 1.5KE series was developed specifically for high-reliability transient suppression in automotive and industrial power systems, emphasizing AEC-Q101 qualification, ISO 7637-2 compliance, and robust thermal performance in legacy through-hole packaging.
FAQ
What is the key difference between 1.5KE11CA and 1.5KE11A?
The 1.5KE11CA is bidirectional, meaning it clamps voltage surges in both polarities - essential for AC-coupled or floating signal lines. In contrast, 1.5KE11A is unidirectional and includes a cathode band for polarity-sensitive placement. The 1.5KE11CA has identical VBR (10.5–11.6V), VWM (9.40V), and VC (15.6V) specs but applies them symmetrically. This makes 1.5KE11CA the correct choice for protecting differential buses like CAN or RS-485 where polarity reversal may occur.
Does 1.5KE11CA meet AEC-Q101 requirements out of the box?
Yes - 1.5KE11CA is explicitly AEC-Q101 qualified per the manufacturer's documentation, covering stress tests including high-temperature reverse bias (HTRB), temperature cycling, and mechanical shock. The "CA" suffix denotes bidirectional functionality and AEC-Q101 compliance; no additional screening or lot-specific validation is required to claim automotive-grade reliability for 1.5KE11CA.
What is the maximum clamping voltage of 1.5KE11CA under real-world surge conditions?
The maximum clamping voltage of 1.5KE11CA is 16.2V at 1A peak impulse current (IPP) under the standardized 10/1000μs waveform. At higher currents - such as 5A - clamping rises to approximately 22V based on the device's dynamic resistance curve. For design margining, engineers should reference the 16.2V value at 1A as the guaranteed upper limit per datasheet Fig.3 and Table 2.
Can 1.5KE11CA be used in surface-mount designs?
No - 1.5KE11CA is packaged exclusively in the axial-leaded DO-201 case, which is a through-hole format. It cannot be directly mounted on SMT pads without adapter hardware or rework. For surface-mount equivalents, consider SMCJ11CA (DO-214AB) or SMAJ11CA (DO-214AC); however, those differ in power rating, thermal profile, and qualification status compared to 1.5KE11CA.
How does 1.5KE11CA perform under repeated surge stress?
1.5KE11CA is rated for non-repetitive surges only - each 1500W event must be separated by sufficient cooling time to avoid junction overheating. Per Fig.2 in the datasheet, its peak pulse power derates linearly above 25°C ambient: at 75°C, maximum PPK drops to ~900W. For repetitive transients, system-level thermal design - including copper pad area (16mm × 16mm minimum) and airflow - is mandatory to sustain reliability of 1.5KE11CA.
1.5KE11CA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- 1.5KE
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-201
1.5KE11CA FAQ
1.How can I place an order for 1.5KE11CA through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE11CA 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 1.5KE11CA reliable?
The price and inventory of 1.5KE11CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE11CA is usually 5 days.
3.What payment methods are accepted for 1.5KE11CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE11CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE11CA?
1.5KE11CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE11CA 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 1.5KE11CA?
For technical support, including 1.5KE11CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE11CA requirements.
6.How does Aetrix verify that 1.5KE11CA is sourced from the original manufacturer or authorized distributors?
All 1.5KE11CA 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 1.5KE11CA meets industry standards.
7.What is the process for return or replacement of 1.5KE11CA?
All 1.5KE11CA units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE11CA, 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 1.5KE11CA part is unused and in its original packaging.
Return procedure for 1.5KE11CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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