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Diodes Incorporated 1.5KE11CA-T
- Part No.:
- 1.5KE11CA-T
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE11CA-T.pdf
- Description:
- TVS DIODE 9.4VWM 15.6VC DO201
- Quantity:
- Payment:
- Shipping:
Inventory:3,196
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Product details
Overview
1.5KE11CA-T from Diodes Incorporated is a bidirectional 1500W transient voltage suppressor (TVS) diode in DO-201 package, designed for primary-level overvoltage protection in DC power rails and signal lines. It features a 9.4V reverse standoff voltage, 10.5V minimum breakdown voltage at 1mA test current, 15.6V maximum clamping voltage at 96A peak pulse current, and operates across –55°C to +175°C.
For engineers reviewing the 1.5KE11CA-T datasheet, 1.5KE11CA-T pinout, 1.5KE11CA-T application, or 1.5KE11CA-T equivalent, key selection criteria include clamping voltage margin relative to protected IC VDD, peak pulse current handling under IEC 61000-4-5 surge waveforms, thermal derating above +25°C ambient, and bidirectional symmetry for AC-coupled or floating bus protection.
Technical Context
This TVS diode uses a glass-passivated silicon junction to achieve fast response time (<1 ps) and stable clamping performance under repetitive 1.0ms 8/20μs surge pulses. Its bidirectional construction enables symmetrical clamping for both positive and negative transients without polarity dependency.
The device is rated for 1500W peak pulse power dissipation with 5.0W steady-state power at 75°C lead temperature, and exhibits a low 0.075%/°C voltage temperature coefficient-critical for maintaining clamping accuracy across automotive and industrial operating ranges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 1500 W - sustains single 1.0ms 8/20μs surge events per IEC 61000-4-5 Level 4 without degradation |
| Reverse Standoff Voltage (VRWM) | 9.4 V - maximum continuous DC or RMS voltage before significant leakage; sets upper limit for protected circuit operating voltage |
| Breakdown Voltage (VBR) | 10.5 V min @ 1mA - onset of avalanche conduction; defines threshold where clamping begins |
| Clamping Voltage (VC) | 15.6 V max @ 96A IPP - maximum voltage seen by downstream circuit during full-rated surge; determines required IC overvoltage margin |
| Peak Pulse Current (IPP) | 96 A - maximum non-repetitive surge current the device can safely divert while maintaining specified VC |
| Operating Temperature | –55°C to +175°C - supports under-hood automotive, industrial motor drives, and outdoor power supply applications |
| Leakage Current (IR) | 5.0 μA max @ 9.4V - ensures minimal standby power loss and no false triggering on nominal rail voltage |
Pinout & Package
Package: DO-201 axial-leaded through-hole package with transfer-molded epoxy body (UL 94V-0), tin-plated leads, and approximate weight of 1.12 g. Marking consists of "1.5KE11CA" only (bidirectional version has no cathode band).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current sink (negative half-cycle) | Connects to protected line; conducts during negative surges relative to cathode reference |
| Cathode | Transient current sink (positive half-cycle) | Connects to protected line; conducts during positive surges relative to anode reference |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated die construction | Enables stable avalanche characteristics and long-term reliability under repeated surge stress |
| Bidirectional clamping symmetry | Provides identical 9.4V VRWM and 15.6V VC for both polarities-ideal for AC signal lines and floating buses |
| Low voltage temperature coefficient | 0.075%/°C ensures clamping voltage drift remains within ±5% over full –55°C to +175°C range |
| RoHS-compliant, halogen-free | Meets EU Directive 2015/863/EU with <900ppm Br, <900ppm Cl, <1000ppm Sb-supports green manufacturing requirements |
Applications
| Automotive Power Supply Protection | Industrial PLC I/O Module Protection |
|---|---|
Use Scenario: 12V battery rail in engine control units exposed to load dump (ISO 7637-2 Pulse 5a) and alternator ripple. IC Role / Device Role: Primary overvoltage clamp placed upstream of DC-DC converters and microcontroller power inputs. Use Value: Limits transient excursions to ≤15.6V, preserving 16V-rated input capacitors and preventing brownout resets in safety-critical ECUs. |
Use Scenario: 24V digital input channels in programmable logic controllers subject to field-wiring induced surges (IEC 61000-4-4 EFT). IC Role / Device Role: Front-end transient suppressor on isolated optocoupler input side, before series current-limiting resistor. Use Value: Absorbs 96A pulses without latch-up, enabling robust immunity to 4kV EFT bursts while maintaining <5μA leakage at 24V nominal. |
| AC-DC Adapter Secondary-Side Clamp | RS-485 Transceiver Bus Protection |
Use Scenario: Output rectifier rail in offline flyback adapters where output capacitor overvoltage must be limited during no-load or short-circuit recovery. IC Role / Device Role: Bidirectional clamp across secondary winding or output capacitor to suppress ringing and transformer reset spikes. Use Value: Symmetric 9.4V standoff prevents conduction during normal 12V/19V output regulation, yet clamps both positive and negative overshoots to ≤15.6V. |
Use Scenario: Data lines of RS-485 transceivers installed in factory automation networks with long cable runs susceptible to lightning-induced surges. IC Role / Device Role: Line-to-line and line-to-ground TVS pair protecting differential A/B bus pins against common-mode and differential-mode transients. Use Value: Matches RS-485 common-mode range (±7V) with 9.4V VRWM and clamps 10/1000μs surges to ≤15.6V-preserving transceiver integrity per TIA-485-A. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ11CA | 600W rating, DO-214AA (SMB) package, 11.1V VRWM, 18.2V VC @ 33A | Lower power handling; suited for PCB space-constrained designs with lower surge exposure | Select when board area is critical and IEC 61000-4-5 Level 3 (1kV/2kA) suffices |
| 1.5SMC11CA | 1500W rating, DO-214AB (SMC) package, 9.4V VRWM, 15.6V VC @ 96A, same electrical specs | Surface-mount alternative with identical clamping but higher thermal resistance than axial DO-201 | Choose for automated assembly where through-hole mounting is impractical and thermal mass is managed via copper pour |
Compared with SMBJ11CA and 1.5SMC11CA, the 1.5KE11CA-T delivers identical clamping performance at full 1500W surge rating but offers superior thermal dissipation via axial leads and higher mechanical robustness in high-vibration environments-making it preferred for under-hood and heavy-industrial deployments.
Availability
1.5KE11CA-T is available at Aetrix Electronics and suitable for automotive power rail protection, industrial I/O surge hardening, AC-DC adapter overvoltage limiting, and RS-485 bus protection requiring stable component supply across extended product lifecycles.
Supply support for 1.5KE11CA-T 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability protection, power management, and signal integrity solutions for automotive, industrial, and computing markets.
The 1.5KE series was engineered specifically for high-energy transient suppression in harsh-environment applications, emphasizing rugged packaging, wide temperature operation, and consistent clamping under repetitive surge stress.
FAQ
What is the difference between 1.5KE11CA-T and 1.5KE11A-T?
The "C" suffix denotes bidirectional construction: 1.5KE11CA-T clamps symmetrically for both positive and negative transients, while 1.5KE11A-T is unidirectional with a cathode band marking and conducts only during positive surges relative to cathode. Their VRWM, VBR, and VC values are identical, but CA devices are used where polarity is undefined or AC-coupled.
Can 1.5KE11CA-T be used in place of a 12V Zener diode for voltage regulation?
No-it is not designed for continuous regulation. The 1.5KE11CA-T operates only during transient overvoltage events and lacks the tight tolerance, low dynamic impedance, and thermal stability required for DC voltage reference or regulation. Its 9.4V VRWM and 10.5V VBR are surge thresholds, not regulated output voltages.
What is the maximum allowable PCB trace length between 1.5KE11CA-T and the protected IC?
To maintain effective clamping, total inductance from TVS to protected node must be minimized. For 96A/1.0ms pulses, keep trace length under 10 mm with ≥1 oz copper and direct connection to ground plane. Longer traces increase clamping voltage due to L·di/dt; measured overshoot exceeds 15.6V if inductance exceeds ~15 nH.
Is 1.5KE11CA-T qualified to AEC-Q101 for automotive use?
No-this specific part is not AEC-Q101 qualified. While Diodes offers AEC-Q101 versions in the same 1.5KE family (e.g., 1.5KE11CAQ), the -T suffix indicates standard commercial-grade packaging. Automotive designs requiring qualification must specify the Q-suffix variant and confirm PPAP documentation availability.
1.5KE11CA-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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):
- 9A
- 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-T FAQ
1.How can I place an order for 1.5KE11CA-T through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE11CA-T 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-T reliable?
The price and inventory of 1.5KE11CA-T 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-T is usually 5 days.
3.What payment methods are accepted for 1.5KE11CA-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE11CA-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE11CA-T?
1.5KE11CA-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE11CA-T 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-T?
For technical support, including 1.5KE11CA-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE11CA-T requirements.
6.How does Aetrix verify that 1.5KE11CA-T is sourced from the original manufacturer or authorized distributors?
All 1.5KE11CA-T 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-T meets industry standards.
7.What is the process for return or replacement of 1.5KE11CA-T?
All 1.5KE11CA-T units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE11CA-T, 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-T part is unused and in its original packaging.
Return procedure for 1.5KE11CA-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE11CA-T Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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onsemi
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Diodes Incorporated
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Diodes Incorporated
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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