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Taiwan Semiconductor Corporation 1.5KE11
- Part No.:
- 1.5KE11
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE11.pdf
- Description:
- 1500W, 11V, 10%, UNIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:2,824
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Product details
Overview
1.5KE11 from Taiwan Semiconductor is a unidirectional 1500W transient voltage suppressor (TVS) diode designed for primary overvoltage protection in DC power rails and signal lines. It features a nominal breakdown voltage of 11 V, minimum/maximum VBR of 9.90 V / 12.1 V at 1.0 mA test current, working stand-off voltage of 8.92 V, clamping voltage of 16.2 V at 1 A peak impulse current, and DO-201 axial package. It is used in automotive ECU power input stages to absorb ISO 7637-2 Pulse 1/2a/2b transients.
For engineers reviewing the 1.5KE11 datasheet, 1.5KE11 pinout, 1.5KE11 application, or 1.5KE11 equivalent, this page delivers verified electrical parameters, DO-201 terminal polarity, clamping performance under 10/1000 µs surge, leakage behavior at VWM, and direct alternatives with documented VBR, IPP, and VC differences.
Technical Context
The 1.5KE11 operates as a unidirectional avalanche diode, triggering when reverse voltage exceeds its 9.90–12.1 V breakdown range. Its low dynamic impedance ensures rapid voltage clamping during transients, while its 16.2 V clamping voltage at 1 A limits downstream stress. It complies with ISO 7637-2 Pulse 1 (inductive load dump), Pulse 2a (battery disconnect), and Pulse 2b (load dump with alternator).
Thermal derating follows JEDEC standard curves: peak power drops linearly above 25°C ambient, reaching ~75% at 75°C. The device sustains 200 A non-repetitive forward surge (8.3 ms half-sine) and exhibits <1 µA blocking leakage above 10 V, confirming suitability for low-power standby circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR @ IT = 1.0 mA | 9.90–12.1 V - defines precise avalanche onset threshold for reliable overvoltage detection |
| VWM | 8.92 V - maximum continuous reverse operating voltage before leakage rises significantly |
| VC @ IPP = 1 A | 16.2 V - clamped voltage seen by protected circuit during worst-case 10/1000 µs surge |
| PPK | 1500 W - peak pulse power handling capability per single 10/1000 µs waveform |
| IPP max | 1 A - maximum non-repetitive peak impulse current it can safely divert |
| Junction temp. range | −55 °C to +175 °C - enables operation in under-hood automotive environments |
| Leakage @ VWM | <1 µA - negligible standby current draw in always-on systems |
Pinout & Package
Package: DO-201 axial leaded package with cathode band marking; leads are pure tin plated, solderable per J-STD-002; meets UL 94V-0 flammability rating and JESD201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unmarked end) | Forward current path / low-side reference | Connected to ground or low-voltage rail in unidirectional clamp configuration |
| Cathode (banded end) | Reverse-biased avalanche node | Connected to protected line; conducts only during overvoltage events to shunt energy to ground |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W surge rating (10/1000 µs) | Enables robust protection against automotive load dump and inductive switching spikes without derating |
| Clamping ratio VC/VBR ≈ 1.45 | Indicates efficient voltage limiting-only 45% overhead above breakdown, minimizing IC stress |
| Response time <1.0 ps (0 V → VBR) | Ensures suppression initiates before fast transients (e.g., ESD, EFT) damage sensitive inputs |
| AEC-Q101 qualified option available | Validated for automotive-grade reliability including temperature cycling, humidity, and mechanical shock |
| RoHS & halogen-free (IEC 61249-2-21) | Meets global environmental compliance requirements for industrial and automotive PCB assembly |
Applications
| Automotive Power Input Protection | Industrial PLC Digital I/O Protection |
|---|---|
Use Scenario: 12 V battery-fed ECU power supply exposed to ISO 7637-2 Pulse 1 (−150 V, 40 ms) and Pulse 2a (+100 V, 50 ms). IC Role / Device Role / Timing Role: Unidirectional TVS placed between VIN and GND to clamp negative transients and limit positive surges before LDO input. Use Value: Limits voltage to ≤16.2 V during 1 A surge, preventing damage to 20 V-rated input capacitors and enabling use of cost-effective 25 V input-stage components. |
Use Scenario: 24 V DC digital input module receiving signals from field sensors subject to inductive kickback and EFT bursts. IC Role / Device Role / Timing Role: 1.5KE11 installed across input terminals to absorb 10/1000 µs surges up to 1500 W before signal conditioning circuitry. Use Value: Maintains <1 µA leakage at 24 V standby, preserving low-power sleep mode integrity while providing sub-ns response to fast transients. |
| LED Driver Supply Rail Clamp | RS-485 Transceiver Bus Line Protection |
Use Scenario: Constant-current LED driver powered from 12 V supply experiencing load dump events during vehicle ignition cycles. IC Role / Device Role / Timing Role: 1.5KE11 placed on driver's input rail to clamp voltage excursions and prevent MOSFET gate oxide rupture. Use Value: Clamps to 16.2 V within 1 ps, protecting 20 V-rated gate drivers and reducing need for oversized input capacitors. |
Use Scenario: RS-485 transceiver bus lines connected to long cables in factory automation, vulnerable to induced lightning surges and ESD. IC Role / Device Role / Timing Role: Unidirectional 1.5KE11 used on receiver side (A/B-to-GND) to suppress common-mode transients without affecting differential signaling. Use Value: Provides 1500 W surge margin while adding only 1.5 pF junction capacitance (per Fig.5), preserving signal integrity up to 25 Mbps. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ10A | VBR = 11.1–12.3 V, VC = 16.7 V @ 1 A, PPK = 400 W, SMA package | Lower power rating and surface-mount form factor; unsuitable for 1500 W load dump but adequate for ESD/EFT | Select if board space is constrained and surge energy is ≤400 W; not a drop-in replacement due to power and package mismatch |
| ON Semiconductor 1.5KE11A | VBR = 10.5–11.6 V (tighter tolerance), VC = 15.6 V @ 1 A, same DO-201 package and 1500 W rating | Identical application scope; tighter VBR improves predictability in precision clamp designs | Choose 1.5KE11A when ±5% VBR tolerance is required; otherwise 1.5KE11 offers standard-grade cost advantage |
Compared with 1.5KE11, the 1.5KE11A provides tighter breakdown control for improved design margin consistency, while the SMAJ10A trades power capacity and through-hole compatibility for compactness-making it suitable only for lower-energy protection tiers.
Availability
1.5KE11 is available at Aetrix Electronics and suitable for automotive electronics, industrial control systems, and LED lighting applications requiring stable component supply and full traceability across production batches.
Supply support for 1.5KE11 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 devices since 1979.
The 1.5KE series was developed specifically for high-energy transient suppression in automotive and industrial environments, emphasizing rugged DO-201 packaging, AEC-Q101 qualification paths, and consistent clamping performance across temperature.
FAQ
What is the exact breakdown voltage range of the 1.5KE11?
The 1.5KE11 has a guaranteed breakdown voltage range of 9.90 V to 12.1 V at a test current of 1.0 mA, measured per ANSI/IEEE C62.35. This range reflects manufacturing tolerance and ensures reliable triggering across all units. The nominal voltage is 11 V, and the device enters avalanche conduction fully within this window-critical for designing predictable overvoltage thresholds in 12 V systems.
Is the 1.5KE11 unidirectional or bidirectional?
The 1.5KE11 is a unidirectional TVS diode, indicated by its single cathode band marking and specification of VBR and VC only for reverse bias. It conducts during negative transients on the cathode side and blocks forward current like a standard rectifier. Bidirectional variants (e.g., 1.5KE11CA) exist but are distinct part numbers-not interchangeable with the 1.5KE11.
What is the clamping voltage of the 1.5KE11 under surge conditions?
The 1.5KE11 clamps to a maximum of 16.2 V when subjected to a 1 A peak impulse current with a 10/1000 µs waveform. This value is measured per JEDEC standards and represents the highest voltage the protected circuit will experience during that specific surge event. It is derived from the device's dynamic impedance and is confirmed in the Electrical Specifications table on page 2 of the Taiwan Semiconductor datasheet.
Can the 1.5KE11 be used in automotive applications?
Yes-the 1.5KE11 meets ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b immunity requirements and is offered in an AEC-Q101 qualified version (1.5KE11H). Its −55 °C to +175 °C junction temperature range, DO-201 mechanical robustness, and 1500 W surge capability make it suitable for engine control units, body control modules, and infotainment power supplies where load dump and inductive switching protection are mandatory.
What package type does the 1.5KE11 use, and how is polarity marked?
The 1.5KE11 uses the DO-201 axial package with pure tin-plated leads. Polarity is marked by a single cathode band near one lead end; the banded end is the cathode and must be connected toward the protected line, while the unmarked end (anode) connects to ground or the return path. This marking aligns with JEDEC DO-201 standards and is visible in the Package Outline Dimensions diagram on page 7 of the datasheet.
1.5KE11 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:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 8.92V
- Voltage - Breakdown (Min):
- 9.9V
- Voltage - Clamping (Max) @ Ipp:
- 16.2V
- Current - Peak Pulse (10/1000µs):
- 97A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-201
1.5KE11 FAQ
1.How can I place an order for 1.5KE11 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE11 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 1.5KE11 reliable?
The price and inventory of 1.5KE11 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE11 is usually 5 days.
3.What payment methods are accepted for 1.5KE11?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE11 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE11?
1.5KE11 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE11 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 1.5KE11?
For technical support, including 1.5KE11 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE11 requirements.
6.How does Aetrix verify that 1.5KE11 is sourced from the original manufacturer or authorized distributors?
All 1.5KE11 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 1.5KE11 meets industry standards.
7.What is the process for return or replacement of 1.5KE11?
All 1.5KE11 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE11, 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 1.5KE11 part is unused and in its original packaging.
Return procedure for 1.5KE11:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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