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Taiwan Semiconductor Corporation 1.5KE400
- Part No.:
- 1.5KE400
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE400.pdf
- Description:
- 1500W, 400V, 10%, UNIDIRECTIONAL
- Quantity:
- Payment:
- Shipping:
Inventory:7,136
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Product details
Overview
1.5KE400 from Taiwan Semiconductor is a unidirectional 1500W transient voltage suppressor (TVS) diode in DO-201 package, with nominal breakdown voltage 400V, clamping voltage 574V at 2.7A peak impulse current, and working stand-off voltage 324V. It protects automotive and industrial power rails against ISO 7637-2 Pulse 1/2a/2b/3a/3b transients.
For engineers reviewing the 1.5KE400 datasheet, 1.5KE400 pinout, 1.5KE400 application, or 1.5KE400 equivalent, this page delivers verified electrical parameters, mechanical package details, real-world protection use cases, and validated alternative parts for ESD and surge immunity design.
Technical Context
The 1.5KE400 operates as a unidirectional avalanche diode, triggering at VBR = 360–440V (tested at 1.0mA), clamping transients to ≤574V at IPP = 2.7A under 10/1000μs waveform. Its low dynamic impedance ensures rapid energy diversion during fast-rising surges.
Designed for high-energy pulse handling, it sustains 1500W non-repetitive peak power at TA = 25°C, derates linearly above ambient temperature, and maintains junction operation from −55°C to +175°C. Polarity is marked by cathode band per DO-201 outline.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 360V / 440V - Confirmed breakdown range at 1.0mA test current; defines reliable turn-on threshold for overvoltage events. |
| VWM | 324V - Maximum continuous reverse operating voltage; sets safe DC bias margin before leakage rises sharply. |
| VC @ IPP | 574V at 2.7A - Clamping voltage under 10/1000μs surge; determines maximum stress imposed on protected downstream circuitry. |
| PPK | 1500W - Peak pulse power rating; enables robust protection against automotive load dump and inductive switching spikes. |
| IPP | 2.7A - Peak impulse current capacity; quantifies maximum transient energy absorption capability per standardized waveform. |
| TJ max | +175°C - Maximum junction temperature; supports operation in under-hood and industrial power supply environments. |
| Package | DO-201 - Axial-leaded, UL 94V-0 molded case; compatible with through-hole PCB assembly and manual rework. |
Pinout & Package
DO-201 package: axial-leaded, cathode indicated by band-marked end; leads are pure tin plated, solderable per J-STD-002; weight ≈ 0.090g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Ground reference terminal | Connected to system ground or low-side return path; completes conduction loop during reverse-biased clamping. |
| Cathode | Protected line terminal | Connected to line being protected (e.g., battery rail); avalanche conduction initiates here when VAK exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| 1500W surge capability | Handles ISO 7637-2 Pulse 5a (load dump) up to 100V with 10/1000μs profile without degradation. |
| Clamping ratio (VC/VBR) | ≤1.60 - Low ratio ensures minimal overvoltage overshoot during clamping, preserving sensitive ICs. |
| Leakage current | <1μA at 324V - Enables low-power standby mode compatibility without excessive quiescent drain. |
| AEC-Q101 qualification option | Available with "H" suffix (e.g., 1.5KE400H) - Validated for automotive-grade reliability including temperature cycling and HTRB. |
| Fast response time | <1.0ps - Sub-picosecond turn-on enables protection of high-speed interfaces against ESD and EFT. |
Applications
| Automotive Battery Rail Protection | Industrial DC Power Input Stage |
|---|---|
Use Scenario: Protecting engine control unit (ECU) power input against load dump transients up to 120V per ISO 7637-2 Pulse 5a. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery+ and chassis ground; clamps within 1ps after overvoltage onset. Use Value: Limits peak voltage seen by downstream DC/DC converter to ≤574V, preventing MOSFET gate oxide rupture and regulator latch-up. |
Use Scenario: Safeguarding programmable logic controller (PLC) 24V DC input against inductive kickback from solenoid drivers. IC Role / Device Role / Timing Role: Standoff device mounted at connector entry point; absorbs 1500W surge energy in <1ms. Use Value: Eliminates need for series resistors or RC snubbers while maintaining <1μA leakage at nominal 24V operation. |
| LED Streetlight Driver Input | Telecom Power Feeding Interface |
Use Scenario: Shielding constant-current LED driver ICs from lightning-induced surges on outdoor AC/DC front-end inputs. IC Role / Device Role / Timing Role: Primary-level TVS on rectified DC bus; triggered by >324V transients exceeding normal 350V DC bus. Use Value: Withstands repeated 10/1000μs surges up to 2.7A without parameter drift, extending field life beyond 10 years. |
Use Scenario: Protecting PoE-powered equipment (e.g., IP cameras) from induced surges on 48V DC feed lines. IC Role / Device Role / Timing Role: Bidirectional-capable variant (1.5KE400CA) used across differential pairs; clamps common-mode spikes. Use Value: Meets IEC 61000-4-5 Level 3 (1kV/2kA) requirements with single-device placement, reducing BOM count. |
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 P6SMB400A | Same DO-214AA (SMB) package; lower PPK = 600W; VC = 548V @ 2.2A; ±5% VBR tolerance vs. ±10% for 1.5KE400. | Not rated for ISO 7637-2 Pulse 5a; suitable only for lower-energy ESD/EFT, not automotive load dump. | Select when space-constrained SMB layout exists and surge energy is limited to ≤600W. |
| ON Semiconductor 1N6286A | DO-201 package; lower VBR = 40.9–45.2V; VC = 59.3V @ 26A; same 1500W rating but optimized for 43V systems. | Targets 36V nominal battery systems (e.g., commercial vehicles); incompatible with 400V rail protection. | Choose only for 43V applications; not a voltage-range substitute for 1.5KE400. |
Compared with P6SMB400A and 1N6286A, the 1.5KE400 uniquely combines DO-201 through-hole robustness, 400V standoff, and full 1500W ISO 7637-2 compliance-making it irreplaceable for high-voltage automotive and industrial DC bus protection where both energy handling and voltage range are critical.
Availability
1.5KE400 is available at Aetrix Electronics and suitable for automotive ECU power conditioning, industrial PLC input protection, and LED driver surge immunity requiring stable component supply across multi-year production cycles.
Supply support for 1.5KE400 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, serving global automotive, industrial, and consumer markets since 1979.
The 1.5KE series was engineered specifically for high-energy transient suppression in harsh environments, emphasizing AEC-Q101 qualification, wide VBR coverage (6.8V–440V), and DO-201 mechanical reliability for under-hood and factory-floor deployment.
FAQ
What is the maximum clamping voltage of the 1.5KE400 under standard test conditions?
The 1.5KE400 exhibits a maximum clamping voltage (VC) of 574V when subjected to a 10/1000μs surge waveform at IPP = 2.7A, as specified in the official Taiwan Semiconductor datasheet revision O2104. This value defines the upper voltage limit imposed on protected circuitry during worst-case transient events and is measured with strict adherence to ANSI/IEEE C62.35 standards.
Is the 1.5KE400 suitable for bidirectional transient protection?
No, the 1.5KE400 is a unidirectional TVS diode intended for DC line protection with defined anode/cathode polarity. For bidirectional applications, Taiwan Semiconductor offers the 1.5KE400CA variant-explicitly designated for bipolar use with symmetrical breakdown in both directions and identical VBR, VC, and PPK ratings.
Does the 1.5KE400 meet AEC-Q101 reliability requirements?
The base 1.5KE400 is not AEC-Q101 qualified; however, the 1.5KE400H variant-identifiable by the "H" suffix in the ordering code-is fully qualified per AEC-Q101 Rev D, including stress testing for temperature cycling, highly accelerated life testing (HALT), and unbiased high-temperature operating life (UHAST). Always verify the suffix when sourcing for automotive applications.
What is the working stand-off voltage (VWM) of the 1.5KE400, and why does it matter?
The 1.5KE400 has a working stand-off voltage (VWM) of 324V, representing the maximum continuous reverse voltage it can block without significant leakage current. This parameter ensures reliable operation below the breakdown threshold-critical for protecting 300–350V DC bus systems where sustained overvoltage must be avoided while retaining headroom for transient clamping.
How does the 1.5KE400 compare to the 1.5KE400A in terms of electrical performance?
The 1.5KE400A offers tighter VBR tolerance (380–420V vs. 360–440V for 1.5KE400) and slightly lower clamping voltage (548V vs. 574V at same IPP), due to enhanced process control. Both share identical DO-201 packaging, 1500W rating, and thermal limits. The "A" suffix indicates improved parametric consistency-not a different product family.
1.5KE400 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):
- 324V
- Voltage - Breakdown (Min):
- 360V
- Voltage - Clamping (Max) @ Ipp:
- 574V
- Current - Peak Pulse (10/1000µs):
- 2.7A
- 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
1.5KE400 FAQ
1.How can I place an order for 1.5KE400 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE400 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 1.5KE400 reliable?
The price and inventory of 1.5KE400 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE400 is usually 5 days.
3.What payment methods are accepted for 1.5KE400?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE400 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE400?
1.5KE400 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE400 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 1.5KE400?
For technical support, including 1.5KE400 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE400 requirements.
6.How does Aetrix verify that 1.5KE400 is sourced from the original manufacturer or authorized distributors?
All 1.5KE400 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 1.5KE400 meets industry standards.
7.What is the process for return or replacement of 1.5KE400?
All 1.5KE400 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE400, 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 1.5KE400 part is unused and in its original packaging.
Return procedure for 1.5KE400:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE400 Tags
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