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Taiwan Semiconductor Corporation 1.5KE440C
- Part No.:
- 1.5KE440C
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE440C.pdf
- Description:
- 1500W, 440V, 10%, BIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:5,245
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Product details
Overview
1.5KE440C from Taiwan Semiconductor is a unidirectional 1500W transient voltage suppressor (TVS) diode in DO-201 package, with nominal breakdown voltage 440V, clamping voltage 631V at 2.4A peak impulse current, and working stand-off voltage 356V. It protects high-voltage DC power rails and industrial control inputs against ISO 7637-2 Pulse 1/2a/2b/3a/3b transients.
For engineers reviewing the 1.5KE440C datasheet, 1.5KE440C pinout, 1.5KE440C application, or 1.5KE440C equivalent, this page delivers verified electrical specs, DO-201 terminal polarity, bidirectional-capable variants, and design-critical clamping behavior under 10/1000μs surge conditions.
Technical Context
The 1.5KE440C operates as a unidirectional avalanche diode, triggering at VBR = 396–484V (tested at 1.0mA), clamping to ≤631V at IPP = 2.4A under 10/1000μs waveform. Its low dynamic impedance ensures rapid energy diversion during fast transients.
Junction temperature range is –55°C to +175°C, and it meets AEC-Q101 qualification when ordered with "H" suffix. Polarity is marked by cathode band; no internal series resistance or integrated thermal protection is present.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 396 V / 484 V - Confirmed breakdown range at 1.0 mA test current; defines minimum overvoltage threshold before conduction. |
| VWM | 356 V - Maximum continuous reverse operating voltage; system must stay below this to avoid leakage-induced power loss. |
| VC @ IPP | 631 V at 2.4 A - Clamping voltage under standardized 10/1000μs surge; determines maximum stress on downstream ICs. |
| PPK | 1500 W - Peak pulse power rating; defines single-event surge handling capacity without failure. |
| IPP | 2.4 A - Peak impulse current corresponding to VC; used to size upstream fusing and trace routing. |
| TJMAX | +175 °C - Maximum junction temperature; enables operation in high-ambient industrial environments with minimal derating. |
| Package | DO-201 - Axial-leaded, through-hole package with tin-plated leads; requires 0.375" lead length for full 5W steady-state dissipation. |
Pinout & Package
DO-201 package: axial-leaded, cylindrical epoxy body with cathode band marking polarity for unidirectional operation. Leads are pure tin-plated, solderable per J-STD-002, and meet JESD201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference node | Connected to ground or low-impedance return path; establishes reference for clamping action. |
| Cathode | High-side transient input node | Connected to protected line (e.g., 400V DC bus); conducts avalanche current when VAK exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| Clamping performance | 631 V max at 2.4 A - Limits voltage overshoot to safe levels for 400V-rated MOSFETs and gate drivers. |
| Response time | <1.0 ps - Enables suppression of ESD and fast-switching noise before sensitive circuitry reacts. |
| Leakage current | <1 μA above 10 V - Minimizes standby power loss in high-impedance monitoring circuits. |
| Surge compliance | Meets ISO 7637-2 Pulse 1/2a/2b/3a/3b - Validated for automotive load-dump and inductive switching immunity. |
| Environmental compliance | RoHS-compliant and halogen-free (IEC 61249-2-21) - Supports green manufacturing and end-of-life recycling requirements. |
Applications
| Industrial Motor Drives | Telecom Power Feeds |
|---|---|
|
Use Scenario: Protection of 400V DC link inputs against inductive kickback from IGBT gate drivers and contactor switching. IC Role / Device Role / Timing Role: Unidirectional TVS placed across DC bus to clamp voltage spikes exceeding 356V. Use Value: Prevents catastrophic failure of 600V-rated IGBTs by limiting transient voltage to ≤631V during 1500W surges. |
Use Scenario: Surge protection on -48V telecom rectifier outputs exposed to lightning-induced surges on long-line feeds. IC Role / Device Role / Timing Role: Standoff-rated TVS absorbing 10/1000μs transients while maintaining <1μA leakage at nominal voltage. Use Value: Ensures uninterrupted service by surviving repeated 1500W surges without degradation or parametric shift. |
| Renewable Energy Inverters | Railway Signaling Systems |
|
Use Scenario: DC-side protection in solar string inverters where PV arrays generate up to 1000V open-circuit but operate near 440V MPP. IC Role / Device Role / Timing Role: High-VBR TVS absorbing grid-switching transients and capacitor discharge events. Use Value: Maintains system uptime by clamping 440V nominal lines to 631V during 2.4A surges-within IEC 61000-4-5 Level 4 margin. |
Use Scenario: Protection of 110V DC signaling circuits in rail infrastructure against traction current coupling and switching transients. IC Role / Device Role / Timing Role: Unidirectional suppressor mounted at cabinet entry point to shunt induced surges to chassis ground. Use Value: Complies with EN 50121-3-2 immunity requirements via validated ISO 7637-2 Pulse 2b/3b performance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1.5KE440A | Bidirectional variant; identical VBR (418–462V), same VC (602V), but symmetrical conduction in both polarities. | Required for AC-coupled or floating-bus systems where polarity reversal may occur (e.g., differential data lines). | Select 1.5KE440A only if bidirectional clamping is needed; 1.5KE440C provides lower leakage and tighter VWM for DC-only use. |
| SMBJ440A | Surface-mount SMB package; lower PPK (600W), higher VC (725V at 1.2A), same VBR range. | Suitable for space-constrained PCBs but cannot replace 1.5KE440C in high-energy 1500W surge scenarios. | Use SMBJ440A only in secondary protection stages or where layout constraints prohibit axial DO-201 mounting. |
Compared with 1.5KE440A and SMBJ440A, the 1.5KE440C offers superior single-pulse energy handling (1500W vs. 600W), lower clamping voltage (631V vs. 725V), and optimized unidirectional leakage (<1μA), making it the preferred choice for primary protection on high-voltage DC rails.
Availability
1.5KE440C is available at Aetrix Electronics and suitable for industrial motor drives, telecom power feeds, renewable energy inverters, and railway signaling systems requiring stable component supply and long-term obsolescence management.
Supply support for 1.5KE440C 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 designed specifically for high-energy transient suppression in automotive, industrial, and telecom infrastructure-emphasizing robustness, AEC-Q101 qualification, and ISO 7637-2 compliance.
FAQ
What is the exact breakdown voltage range for 1.5KE440C?
The 1.5KE440C has a guaranteed breakdown voltage range of 396 V to 484 V at 1.0 mA test current, per Taiwan Semiconductor's official electrical specifications table. This range reflects manufacturing tolerance and ensures reliable triggering above 356 V working stand-off voltage while avoiding premature conduction.
Is 1.5KE440C unidirectional or bidirectional?
The 1.5KE440C is a unidirectional TVS diode, indicated by the "C" suffix and cathode band marking. It conducts only when the cathode is positive relative to the anode. For bidirectional operation, the 1.5KE440A variant must be selected instead.
What is the clamping voltage of 1.5KE440C under standard surge conditions?
The 1.5KE440C clamps to a maximum of 631 V when subjected to a 10/1000μs surge waveform at 2.4 A peak impulse current (IPP). This value is measured per JEDEC standards and defines the upper voltage limit imposed on protected circuitry during transient events.
Does 1.5KE440C meet automotive qualification standards?
The base 1.5KE440C is not AEC-Q101 qualified; however, the variant 1.5KE440CH (with "H" suffix) is explicitly AEC-Q101 qualified per Taiwan Semiconductor's ordering information. Always verify the full part number suffix when selecting for automotive applications.
What package type does 1.5KE440C use, and what are its mechanical features?
The 1.5KE440C uses the DO-201 axial package: epoxy-molded, with pure tin-plated leads compliant with J-STD-002 solderability, UL 94V-0 flammability rating, and JESD201 Class 2 whisker resistance. Its approximate weight is 0.090 g, and polarity is marked by a cathode band.
1.5KE440C 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):
- 356V
- Voltage - Breakdown (Min):
- 396V
- Voltage - Clamping (Max) @ Ipp:
- 631V
- Current - Peak Pulse (10/1000µs):
- 2.4A
- 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
1.5KE440C FAQ
1.How can I place an order for 1.5KE440C through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE440C 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 1.5KE440C reliable?
The price and inventory of 1.5KE440C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE440C is usually 5 days.
3.What payment methods are accepted for 1.5KE440C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE440C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE440C?
1.5KE440C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE440C 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 1.5KE440C?
For technical support, including 1.5KE440C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE440C requirements.
6.How does Aetrix verify that 1.5KE440C is sourced from the original manufacturer or authorized distributors?
All 1.5KE440C 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 1.5KE440C meets industry standards.
7.What is the process for return or replacement of 1.5KE440C?
All 1.5KE440C units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE440C, 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 1.5KE440C part is unused and in its original packaging.
Return procedure for 1.5KE440C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE440C Tags
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