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Taiwan Semiconductor Corporation 1.5KE400A
- Part No.:
- 1.5KE400A
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE400A.pdf
- Description:
- TVS DIODE 342VWM 548VC DO201
- Quantity:
- Payment:
- Shipping:
Inventory:7,321
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Product details
Overview
1.5KE400A from Taiwan Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in DO-201 package, rated for 1500W peak pulse power at 10/1000μs, with breakdown voltage 380–420V at 1mA test current, clamping voltage 548V at 2.8A peak impulse current, and working stand-off voltage 342V - deployed for automotive load-dump and inductive switching protection in engine control units and power distribution modules.
For engineers reviewing the 1.5KE400A datasheet, 1.5KE400A pinout, 1.5KE400A application, or 1.5KE400A equivalent, key selection criteria include clamping voltage margin vs. system rail, unidirectional polarity marking, DO-201 thermal derating above 25°C, and compliance with ISO 7637-2 Pulse 1/2a/2b/3a/3b for automotive electronics robustness.
Technical Context
The 1.5KE400A operates as a silicon avalanche diode, triggering into low-impedance conduction when reverse voltage exceeds its VBR range (380–420V), limiting transient energy via controlled clamping to ≤548V. Its fast response time (<1.0ps from 0V to VBR) ensures protection before downstream IC damage occurs.
Designed for unidirectional operation only, it features a cathode band marking, maximum junction temperature of +175°C, and meets AEC-Q101 qualification when ordered with "H" suffix. It exhibits <1μA blocking leakage above 10V and a VBR temperature coefficient of 0.110%/°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR @ IT=1mA | 380–420V - defines precise avalanche onset threshold for reliable overvoltage triggering |
| VWM | 342V - maximum continuous reverse operating voltage without significant leakage |
| VC @ IPP=2.8A | 548V - clamped voltage during 10/1000μs surge, determining protected circuit's voltage stress limit |
| PPK | 1500W - peak transient power handling capability under standardized surge waveform |
| IPP | 2.8A - maximum non-repetitive peak impulse current the device safely clamps |
| Junction Temp Range | −55°C to +175°C - enables deployment in under-hood automotive environments |
| Leakage @ VWM | <1μA - ensures minimal standby power loss and signal integrity in high-impedance circuits |
Pinout & Package
Package: DO-201 axial-leaded plastic package with pure tin-plated leads, UL 94V-0 molding compound, and cathode band marking for unidirectional polarity identification. Weight ≈ 0.090g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference node | Connected to ground or low-voltage return path; forms current sink during clamping |
| Cathode | High-side transient input | Marked with band; connects to protected line (e.g., 24V battery rail); conducts avalanche current to anode |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified option | Available with "H" suffix (e.g., 1.5KE400AH), enabling use in automotive powertrain and body control modules |
| ISO 7637-2 compliance | Validated against Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (ESD-like noise) |
| Low dynamic impedance | Enables tight clamping voltage window (VC − VBR = 128–168V), minimizing voltage overshoot on protected lines |
| Fast response time | <1.0ps rise from 0V to VBR, ensuring suppression initiates before sensitive gate oxides or logic inputs fail |
| Halogen-free & RoHS | Meets IEC 61249-2-21 and EU RoHS Directive, supporting green manufacturing and end-of-life compliance |
Applications
| Automotive Load-Dump Protection | Industrial Power Supply Input Protection |
|---|---|
Use Scenario: 24V vehicle electrical system subjected to alternator load-dump transients up to 120V for 400ms. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and DC-DC converter input to clamp surges before regulator overvoltage shutdown. Use Value: Clamps peak to 548V while absorbing 1500W, preventing destruction of upstream fuse boxes and downstream PMICs. | Use Scenario: 380V industrial AC/DC front-end exposed to lightning-induced surges on mains input. IC Role / Device Role / Timing Role: Primary-level TVS across bulk capacitor input to divert surge energy before rectifier bridge and PFC controller. Use Value: Withstands 2.8A impulse current at 548V clamping, preserving hold-up time and avoiding brownout resets in PLC power supplies. |
| Telecom Line Card Surge Suppression | Renewable Energy Inverter DC Link Protection |
Use Scenario: 48V telecom power shelf encountering EFT bursts per IEC 61000-4-4 during hot-swap module insertion. IC Role / Device Role / Timing Role: TVS mounted at backplane connector to shunt fast transients before reaching digital isolators and MCU power rails. Use Value: Sub-1ps response captures nanosecond-scale EFT edges, limiting voltage excursion to safe levels for 3.3V logic interfaces. | Use Scenario: 400V DC link in solar string inverter facing grid-switching transients and partial shading-induced voltage spikes. IC Role / Device Role / Timing Role: Unidirectional TVS across DC bus capacitors to clamp overvoltage events before IGBT gate drivers and current sensors. Use Value: 175°C max junction rating supports operation near heatsinked power stages, maintaining reliability at elevated ambient temperatures. |
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 SMAJ400A | DO-214AC (SMA) package, 400W rating, VBR = 422–467V, VC = 644V @ 0.62A | Lower power rating and higher clamping voltage; suited for space-constrained PCBs where 1500W surge is not required | Select when board layout favors surface-mount and surge energy is limited to ≤400W |
| ON Semiconductor 1N5388B | DO-201, 5W steady-state, VZ = 390V ±5%, no specified 10/1000μs surge rating | Zener-based, not optimized for transient clamping; lacks ISO 7637-2 validation and AEC-Q101 qualification | Use only for low-energy voltage regulation, not for automotive or industrial surge suppression |
Compared with 1.5KE400A, SMAJ400A offers smaller footprint but sacrifices >60% peak power handling and increases clamping voltage by 96V - critical for systems requiring strict overvoltage margins. 1N5388B lacks transient-rated performance data and cannot replace 1.5KE400A in surge-critical designs.
Availability
1.5KE400A is available at Aetrix Electronics and suitable for automotive power distribution, industrial DC power supplies, telecom infrastructure, and renewable energy inverters requiring stable component supply across extended production lifecycles.
Supply support for 1.5KE400A 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 MOSFETs, with global distribution and AEC-Q101-qualified product lines.
The 1.5KE series was designed specifically for high-energy transient suppression in harsh automotive and industrial environments, emphasizing robust clamping, thermal stability, and compliance with ISO 7637-2 and AEC-Q101 standards.
FAQ
What is the exact breakdown voltage range for 1.5KE400A at 1mA test current?
The 1.5KE400A has a guaranteed breakdown voltage (VBR) range of 380V to 420V when tested at IT = 1mA per JEDEC standard. This range reflects manufacturing tolerance and ensures consistent triggering behavior across production lots. The nominal voltage is 400V, and the device is fully characterized per Taiwan Semiconductor's O2104 datasheet revision.
Is 1.5KE400A suitable for bidirectional transient protection?
No, 1.5KE400A is strictly unidirectional. Its cathode band marking and electrical specifications apply only in reverse-bias mode. For bidirectional protection, select a part with "CA" suffix (e.g., 1.5KE400CA) or verify bipolar configuration in the 1.5KE series datasheet - 1.5KE400A does not conduct or clamp in forward direction beyond its VF specification.
Does 1.5KE400A meet AEC-Q101 qualification out of the box?
The base 1.5KE400A is not AEC-Q101 qualified; qualification requires the "H" suffix (e.g., 1.5KE400AH). Taiwan Semiconductor explicitly states AEC-Q101 qualification is available - not standard - and applies only to parts ordered with the H variant. Always verify ordering code and certificate documentation before automotive deployment.
What is the maximum clamping voltage of 1.5KE400A and under what test condition?
The maximum clamping voltage (VC) of 1.5KE400A is 548V, measured at peak impulse current (IPP) = 2.8A using the standardized 10/1000μs double-exponential surge waveform. This value represents worst-case voltage seen by downstream circuitry during full-rated transient events and is confirmed in the Electrical Specifications table on page 3 of the O2104 datasheet.
Can 1.5KE400A be used in place of 1.5KE400 without redesign?
Yes - 1.5KE400A replaces 1.5KE400 with tighter VBR tolerance (380–420V vs. 360–440V) and lower clamping voltage (548V vs. 574V), offering improved precision and reduced voltage stress. Both share identical DO-201 package, pinout, and thermal characteristics; no PCB or schematic changes are needed for drop-in replacement in new designs or field upgrades.
1.5KE400A 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):
- 342V
- Voltage - Breakdown (Min):
- 380V
- Voltage - Clamping (Max) @ Ipp:
- 548V
- Current - Peak Pulse (10/1000µs):
- 2.8A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-201
1.5KE400A FAQ
1.How can I place an order for 1.5KE400A through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE400A 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 1.5KE400A reliable?
The price and inventory of 1.5KE400A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE400A is usually 5 days.
3.What payment methods are accepted for 1.5KE400A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE400A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE400A?
1.5KE400A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE400A 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 1.5KE400A?
For technical support, including 1.5KE400A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE400A requirements.
6.How does Aetrix verify that 1.5KE400A is sourced from the original manufacturer or authorized distributors?
All 1.5KE400A 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 1.5KE400A meets industry standards.
7.What is the process for return or replacement of 1.5KE400A?
All 1.5KE400A units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE400A, 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 1.5KE400A part is unused and in its original packaging.
Return procedure for 1.5KE400A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE400A Tags
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