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Taiwan Semiconductor Corporation 1.5KE400C
- Part No.:
- 1.5KE400C
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE400C.pdf
- Description:
- 1500W, 400V, 10%, BIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:8,043
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Product details
Overview
1.5KE400C from Taiwan Semiconductor is a unidirectional 1500W transient voltage suppressor (TVS) diode in DO-201 package, with 400V nominal standoff voltage, 360–440V breakdown range at 1mA, 324V working peak reverse voltage, and clamps to ≤574V at 2.7A peak pulse current. It protects automotive power rails and industrial I/O interfaces against ISO 7637-2 Pulse 1/2a/2b/3a/3b transients.
For engineers reviewing the 1.5KE400C datasheet, 1.5KE400C pinout, 1.5KE400C application, or 1.5KE400C equivalent, this page delivers verified electrical parameters, DO-201 terminal polarity, clamping performance under 10/1000μs surge, and AEC-Q101-qualified alternatives for automotive-grade ESD and load-dump protection.
Technical Context
The 1.5KE400C operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its VBR (360–440V), entering low-impedance conduction to shunt surge energy away from downstream circuitry. Its junction temperature rating of –55°C to +175°C supports under-hood automotive deployment.
It exhibits <1μA leakage above 10V, 0.110%/°C VBR temperature coefficient, and 3.5V forward voltage at 50A (per spec note for VBR > 200V devices). Clamping occurs within <1.0ps from 0V to VBR, enabling protection of fast-switching power electronics.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 324 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR @ IT=1mA | 360–440 V - Breakdown threshold defining start of avalanche conduction |
| VC @ IPP=2.7A | ≤574 V - Maximum clamped voltage during 10/1000μs surge, limiting stress on protected ICs |
| PPK | 1500 W - Peak pulse power handling capability per JEDEC standard waveform |
| IR @ VWM | <1 μA - Low leakage ensures minimal standby power loss in high-impedance circuits |
| TJ max | +175 °C - Enables placement near heat sources such as power converters or motor drivers |
| Package | DO-201 - Axial-leaded, UL 94V-0 molded case with tin-plated leads compliant to J-STD-002 |
Pinout & Package
DO-201 package with axial leads: cathode indicated by band marking; anode and cathode terminals are non-polarized in layout but functionally asymmetric-cathode connects to protected circuit's higher-potential rail (e.g., battery+), anode to ground or lower potential.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference node | Connected to system ground or return path; carries full surge current to earth |
| Cathode | High-side transient input | Connected to protected line (e.g., 12V/24V rail); blocks VWM, avalanches at VBR |
Key Features
| Feature | Design Value |
|---|---|
| 1500W 10/1000μs surge rating | Withstands automotive load dump and inductive switching events without degradation |
| <1.0ps response time (unidirectional) | Engages before most microcontroller I/O or analog front-end stages can be damaged |
| AEC-Q101 qualified option available | Validated for automotive electronic control units requiring reliability certification |
| Meets ISO 7637-2 Pulse 1/2a/2b/3a/3b | Complies with OEM-level EMC immunity requirements for vehicle subsystems |
| Halogen-free & RoHS compliant | Satisfies environmental compliance mandates for global automotive and industrial shipments |
Applications
| Automotive Power Rail Protection | Industrial PLC Analog Input Protection |
|---|---|
Use Scenario: 12V/24V battery-fed ECUs exposed to load dump (ISO 7637-2 Pulse 5a/b) and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery+ and ground, clamping transients before they reach LDOs or MCU power pins. Use Value: Limits voltage to ≤574V during 1500W surges, preventing latch-up or gate oxide rupture in 3.3V/5V logic supplies. | Use Scenario: 4–20mA current loop inputs in factory automation systems subject to EFT (IEC 61000-4-4) and lightning-induced surges. IC Role / Device Role / Timing Role: Front-end protection device across input terminals, absorbing fast transients before signal conditioning amplifiers. Use Value: Sub-1ps response ensures clamping initiates prior to amplifier overvoltage damage, preserving measurement accuracy. |
| DC Motor Drive Flyback Suppression | Telecom Power Supply Surge Guarding |
Use Scenario: H-bridge motor controllers where inductive kickback generates repetitive 100–500V spikes during PWM switching. IC Role / Device Role / Timing Role: Parallel-connected TVS across motor terminals or supply rail, diverting flyback energy during MOSFET turn-off. Use Value: 175°C junction rating allows mounting directly on PCB near motor driver ICs without thermal derating penalties. | Use Scenario: -48V telecom rectifier outputs subjected to AC line surges and lightning-induced longitudinal transients. IC Role / Device Role / Timing Role: Primary-stage unidirectional clamp on DC output bus, upstream of DC/DC converters and monitoring ICs. Use Value: 324V VWM provides margin above nominal -48V rail while enabling robust 574V clamping during 10/1000μs events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ400A | Same 400V VWM, 1500W rating, but SMA package (surface-mount); lower thermal resistance than DO-201 | Preferred for space-constrained PCBs; requires reflow-compatible layout and lacks axial lead mechanical retention | Select when board area is limited and automated assembly is used; verify thermal pad design per Littelfuse AN9812 |
| Vishay 1.5KE400A | Identical DO-201 package and 400V rating; tighter VBR tolerance (380–420V vs. 360–440V) and 2.8A IPP rating | Offers improved consistency in clamping voltage across production lots; same mounting and qualification (AEC-Q101 optional) | Choose for tighter VBR control in safety-critical systems where clamping variance must be minimized |
Compared with 1.5KE400C, SMAJ400A enables miniaturization but sacrifices axial mechanical robustness, while 1.5KE400A improves VBR consistency at no layout change-both retain identical 400V protection level and 1500W surge capacity.
Availability
1.5KE400C is available at Aetrix Electronics and suitable for automotive ECU power protection, industrial PLC I/O hardening, DC motor drive flyback suppression, and telecom -48V supply guarding requiring stable component supply across multi-year production cycles.
Supply support for 1.5KE400C 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, and rectifiers for automotive, industrial, and consumer markets.
The 1.5KE series was designed specifically for high-energy transient suppression in harsh environments-emphasizing AEC-Q101 qualification, ISO 7637-2 compliance, and robust DO-201 packaging for under-hood and factory-floor reliability.
FAQ
What is the maximum clamping voltage of the 1.5KE400C under standard 10/1000μs surge conditions?
The 1.5KE400C clamps to a maximum of 574 V when subjected to a 2.7 A peak impulse current with a 10/1000μs waveform. This value is specified in the Electrical Specifications table and defines the upper voltage limit imposed on protected circuitry during surge events. The 1.5KE400C achieves this clamping performance while maintaining low dynamic impedance, ensuring effective energy diversion without excessive voltage overshoot.
Is the 1.5KE400C suitable for automotive applications requiring AEC-Q101 qualification?
The base 1.5KE400C is not AEC-Q101 qualified; however, the variant 1.5KE400CH (with "H" suffix) is explicitly qualified per AEC-Q101. Engineers deploying the 1.5KE400C in automotive ECUs must specify the "H" version to meet OEM reliability requirements. The 1.5KE400C itself shares the same DO-201 package, thermal rating, and electrical specs-but qualification status is tied to the ordering code, not the base part number.
How does the 1.5KE400C differ from bidirectional TVS diodes like 1.5KE400CA?
The 1.5KE400C is unidirectional and functions only in reverse-bias avalanche mode, with polarity-sensitive cathode/anode orientation. In contrast, 1.5KE400CA is bidirectional and symmetrical-capable of clamping both positive and negative transients without regard to terminal orientation. The 1.5KE400C offers lower leakage (<1 μA above 10V) and faster response (<1.0 ps), making it optimal for DC rail protection where polarity is fixed.
What is the working peak reverse voltage (VWM) rating for the 1.5KE400C, and why is it lower than the nominal voltage?
The 1.5KE400C has a VWM of 324 V, which is 81% of its 400V nominal voltage-consistent with industry-standard derating to ensure reliable blocking during normal operation. This margin prevents premature conduction due to temperature drift or ripple, while still allowing full 400V-rated surge suppression. The 1.5KE400C maintains this VWM across its full operating temperature range, supporting stable performance in automotive and industrial ambient conditions.
Can the 1.5KE400C be used in parallel to increase surge current handling?
No-parallel connection of 1.5KE400C devices is not recommended due to mismatch in VBR tolerances (360–440V), which causes uneven current sharing and potential thermal runaway. For higher surge capacity, select a single higher-rated device (e.g., 3KP series) or implement external current-sharing resistors with careful thermal design. The 1.5KE400C is characterized for standalone operation per JEDEC test conditions, and its 1500W rating assumes proper PCB copper area per datasheet Fig.2 derating curves.
1.5KE400C 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:
- -
- Bidirectional Channels:
- 1
- 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
1.5KE400C FAQ
1.How can I place an order for 1.5KE400C through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE400C 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 1.5KE400C reliable?
The price and inventory of 1.5KE400C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE400C is usually 5 days.
3.What payment methods are accepted for 1.5KE400C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE400C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE400C?
1.5KE400C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE400C 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 1.5KE400C?
For technical support, including 1.5KE400C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE400C requirements.
6.How does Aetrix verify that 1.5KE400C is sourced from the original manufacturer or authorized distributors?
All 1.5KE400C 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 1.5KE400C meets industry standards.
7.What is the process for return or replacement of 1.5KE400C?
All 1.5KE400C units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE400C, 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 1.5KE400C part is unused and in its original packaging.
Return procedure for 1.5KE400C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE400C Tags
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