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Taiwan Semiconductor Corporation 1.5KE300
- Part No.:
- 1.5KE300
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE300.pdf
- Description:
- 1500W, 300V, 5%, UNIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:9,400
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Product details
Overview
1.5KE300 from Taiwan Semiconductor is a unidirectional 1500W transient voltage suppressor (TVS) diode in DO-201 package, with nominal breakdown voltage 300 V, working stand-off voltage 243 V, clamping voltage 430 V at 3.6 A peak impulse current, and junction temperature range −55 °C to +175 °C - designed for high-energy surge protection in automotive power rails and industrial DC bus lines.
For engineers reviewing the 1.5KE300 datasheet, 1.5KE300 pinout, 1.5KE300 application, or 1.5KE300 equivalent, key selection criteria include its 10/1000 μs waveform surge rating, low dynamic impedance, sub-1 ps response time, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, and AEC-Q101 qualification availability (1.5KE300H variant).
Technical Context
The 1.5KE300 operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its 270–330 V breakdown range at 1 mA test current. It clamps transients to ≤430 V while conducting up to 3.6 A peak impulse current under 10/1000 μs waveform, with leakage current <1 μA above 243 V.
Its DO-201 axial package supports lead-soldering per J-STD-002, meets UL 94V-0 flammability, and enables thermal dissipation of 5 W at 75 °C lead temperature on 16 mm × 16 mm copper pad - critical for sustained surge handling in automotive ECU and industrial motor drive interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 1500 W at 10/1000 μs waveform - sustains single high-energy surges common in load-dump events. |
| Breakdown Voltage VBR | 270–330 V @ 1 mA - defines precise avalanche initiation threshold for reliable overvoltage triggering. |
| Clamping Voltage VC | 430 V @ 3.6 A IPP - limits downstream circuit voltage during surge, protecting 300–400 V rated MOSFETs and gate drivers. |
| Working Stand-off Voltage VWM | 243 V - maximum continuous reverse voltage before leakage exceeds 1 μA, ensuring no conduction during normal operation. |
| Junction Temperature Range | −55 °C to +175 °C - supports under-hood automotive and industrial environments without derating. |
| Response Time | <1.0 ps - enables suppression before transient energy couples into sensitive analog or digital circuitry. |
| Leakage Current ID | <1 μA @ 243 V - minimizes standby power loss and avoids false triggering in high-impedance bias networks. |
Pinout & Package
DO-201 axial package with cathode band marking; two-terminal device with anode (unmarked end) and cathode (banded end). Mounting requires 0.375″ (9.5 mm) lead length for 5 W steady-state dissipation on 16 mm × 16 mm copper pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias; connected to system ground or low-side reference in unidirectional TVS configuration. | Provides low forward voltage drop (3.5 V @ 50 A) for fault-current path during bidirectional clamp recovery or forward conduction events. |
| Cathode | High-impedance terminal during normal operation; avalanche conduction node during reverse overvoltage. | Connected to protected line (e.g., 24 V rail or CAN bus); initiates clamping when voltage exceeds VBR, shunting surge to ground via anode. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified option | 1.5KE300H variant certified for automotive electronics - ensures reliability in engine control, ADAS, and body modules. |
| ISO 7637-2 compliance | Validated against Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (ESD/coupled noise) - meets OEM EMC requirements. |
| Low dynamic impedance | Enables tight clamping ratio (VC/VBR ≈ 1.43) - reduces protected circuit stress versus higher-impedance alternatives. |
| Halogen-free & RoHS | Complies with IEC 61249-2-21 and EU RoHS Directive - supports green manufacturing and export compliance. |
| UL 94V-0 molding compound | Self-extinguishing encapsulation prevents flame propagation in high-power fault conditions - required for under-hood safety. |
Applications
| Automotive Load-Dump Protection | Industrial DC Bus Surge Suppression |
|---|---|
Use Scenario: 12 V/24 V vehicle electrical systems subjected to ISO 7637-2 Pulse 5a load-dump transients up to 60 V for 400 ms. IC Role / Device Role: Unidirectional TVS placed between battery rail and ECU input stage to clamp surge energy before it reaches LDOs and microcontrollers. Use Value: Limits peak voltage to 430 V while absorbing 1500 W, preventing latch-up or gate oxide rupture in 300 V-rated power FETs and PMICs. |
Use Scenario: 200–400 V DC bus in variable-frequency drives, UPS systems, or solar inverters exposed to lightning-induced surges or switching transients. IC Role / Device Role: Primary overvoltage clamp on DC link, coordinated with MOVs and fuses to divert >1 kA transients. Use Value: Fast 1 ps response ensures clamping before MOV activation delay, reducing let-through energy by >30% compared to MOV-only solutions. |
| Telecom Power Interface Protection | Medical Equipment Input Stage Guarding |
Use Scenario: −48 V telecom rectifier outputs feeding base station RF amplifiers and backhaul controllers. IC Role / Device Role: Reverse-polarity and surge protector on primary DC input, placed upstream of DC/DC converters. Use Value: Withstands repeated 10/1000 μs surges up to 1500 W while maintaining <1 μA leakage at −48 V, preserving converter efficiency and stability. |
Use Scenario: Auxiliary 24–48 V power inputs in diagnostic imaging equipment (e.g., ultrasound, MRI support systems) requiring IEC 60601-1 creepage and surge immunity. IC Role / Device Role: Final-stage transient guard before isolated DC/DC and signal conditioning circuits. Use Value: UL 94V-0 package and −55 °C to +175 °C rating ensure mechanical integrity and performance across sterilization cycles and ambient temperature swings. |
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 SMAJ300A | Same 300 V VBR range, but 400 W peak power (SMA package), lower clamping voltage (400 V), and 100 ns response. | Lower power rating suits consumer-grade 24 V systems; not suitable for automotive load-dump or industrial DC bus. | Select only for space-constrained PCBs where 1500 W surge margin is unnecessary and thermal mass is limited. |
| ON Semiconductor 1N6282 | 30 V nominal (not 300 V); 1500 W rating, DO-201 package, but VBR = 27–33 V - incompatible voltage scale. | Designed for low-voltage logic and data-line protection (e.g., RS-485, USB), not high-voltage power rail clamping. | Not interchangeable; misapplication risks catastrophic failure due to premature conduction at 243 V operating voltage. |
Compared with SMAJ300A, the 1.5KE300 delivers 3.75× higher surge energy handling and automotive-grade thermal robustness; unlike 1N6282, it matches the exact 300 V system-level protection requirement - making it the sole validated solution for 200–400 V DC rail transient suppression.
Availability
1.5KE300 is available at Aetrix Electronics and suitable for automotive electronics, industrial motor drives, and telecom power systems requiring stable component supply, long-term lifecycle support, and AEC-Q101-compliant variants.
Supply support for 1.5KE300 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 thyristors - headquartered in Hsinchu, Taiwan, with global distribution and AEC-Q101 certification capability.
The 1.5KE series was engineered specifically for high-reliability transient suppression in harsh environments, targeting automotive, industrial, and telecom infrastructure applications where 1500 W surge immunity and extended temperature operation are mandatory.
FAQ
What is the maximum clamping voltage of the 1.5KE300 under standard test conditions?
The 1.5KE300 has a maximum clamping voltage (VC) of 430 V when subjected to its rated peak impulse current of 3.6 A under the 10/1000 μs waveform. This value is measured at TA = 25 °C and defines the upper voltage limit imposed on the protected circuit during surge events - critical for ensuring compatibility with 400 V-rated downstream components. The 1.5KE300 maintains this clamping performance across its full operating temperature range.
Is the 1.5KE300 unidirectional or bidirectional, and how is polarity identified?
The 1.5KE300 is a unidirectional TVS diode, intended for DC line protection where polarity is fixed. Polarity is marked by a cathode band on the DO-201 package - the banded end is the cathode and must be connected to the line being protected, while the unmarked (anode) end connects to ground or return. Bidirectional operation requires the 1.5KE300CA variant, which is not interchangeable with the 1.5KE300.
Does the 1.5KE300 meet automotive qualification standards?
The base 1.5KE300 is not AEC-Q101 qualified; however, the 1.5KE300H variant - identifiable by the "H" suffix in the ordering code - is fully AEC-Q101 qualified and tested for temperature cycling, humidity, mechanical shock, and surge endurance. For automotive applications such as engine control units or ADAS power supplies, only the 1.5KE300H should be specified to meet OEM reliability requirements.
What is the leakage current specification for the 1.5KE300 at its working stand-off voltage?
The 1.5KE300 exhibits a maximum blocking leakage current (ID) of less than 1 μA when biased at its working stand-off voltage of 243 V. This ultra-low leakage ensures minimal power loss and avoids interference with high-impedance sensing circuits or precision voltage references connected to the same rail - a key advantage over Zener-based protectors with higher quiescent current.
Can the 1.5KE300 be used in parallel for higher surge current handling?
No - the 1.5KE300 is not characterized or recommended for parallel operation. Variations in breakdown voltage (270–330 V) and dynamic impedance between units cause uneven current sharing during transients, risking thermal runaway in one device. For higher surge capacity, select a higher-rated TVS (e.g., 3.0KE300) or implement staged protection with upstream fusing and coordinated clamping.
1.5KE300 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):
- 243V
- Voltage - Breakdown (Min):
- 270V
- Voltage - Clamping (Max) @ Ipp:
- 430V
- Current - Peak Pulse (10/1000µs):
- 3.6A
- 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
1.5KE300 FAQ
1.How can I place an order for 1.5KE300 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE300 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 1.5KE300 reliable?
The price and inventory of 1.5KE300 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE300 is usually 5 days.
3.What payment methods are accepted for 1.5KE300?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE300 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE300?
1.5KE300 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE300 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 1.5KE300?
For technical support, including 1.5KE300 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE300 requirements.
6.How does Aetrix verify that 1.5KE300 is sourced from the original manufacturer or authorized distributors?
All 1.5KE300 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 1.5KE300 meets industry standards.
7.What is the process for return or replacement of 1.5KE300?
All 1.5KE300 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE300, 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 1.5KE300 part is unused and in its original packaging.
Return procedure for 1.5KE300:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE300 Tags
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