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Taiwan Semiconductor Corporation 1.5KE440CA
- Part No.:
- 1.5KE440CA
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE440CA.pdf
- Description:
- TVS 1500W 440V 5% BIDIR DO-201
- Quantity:
- Payment:
- Shipping:
Inventory:856
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Product details
Overview
1.5KE440CA from Taiwan Semiconductor is a bidirectional 1500W transient voltage suppressor (TVS) diode in DO-201 package, designed for high-energy surge protection in automotive and industrial power rails. It features a nominal breakdown voltage of 440V, clamping voltage of 631V at 2.4A peak impulse current, and operates across -55°C to +175°C junction temperature range.
For engineers reviewing the 1.5KE440CA datasheet, 1.5KE440CA pinout, 1.5KE440CA application, or 1.5KE440CA equivalent, this part serves as a robust, AEC-Q101-qualified solution for ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance in 24V/48V vehicle subsystems, DC power distribution units, and high-voltage industrial controls requiring fast (<5.0ns) bidirectional clamping response.
Technical Context
The 1.5KE440CA is a silicon avalanche diode configured in a symmetrical bipolar structure, enabling identical electrical characteristics in both forward and reverse directions. Its 10/1000μs waveform surge rating of 1500W and low dynamic impedance ensure effective energy diversion during fast transients like load dump or inductive switching.
It meets ISO 7637-2 immunity requirements for automotive electronics and supports steady-state power dissipation up to 5W at TL = 75°C with 0.375" lead length on 16mm × 16mm copper pad. The device exhibits a VBR range of 396–484V at 1mA test current and a temperature coefficient of 0.110%/°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 396V / 484V at IT = 1mA - defines reliable avalanche initiation window under surge conditions |
| VWM | 356V - maximum continuous working voltage before leakage exceeds 1μA, suitable for 400V DC bus protection |
| VC @ IPP | 631V at IPP = 2.4A - clamping voltage limiting downstream component stress during 10/1000μs surge |
| PPK | 1500W - peak pulse power handling capability per JEDEC standard, derated above 25°C ambient |
| TJ max | +175°C - enables operation in under-hood automotive environments and high-temperature industrial enclosures |
| Package | DO-201 - industry-standard axial-leaded package with UL 94V-0 molding compound and tin-plated leads |
| Response time | <5.0ns - ensures sub-nanosecond reaction to bidirectional transients, critical for EFT and load-dump suppression |
Pinout & Package
DO-201 package: axial-leaded, cylindrical epoxy body with cathode band marking for unidirectional variants; 1.5KE440CA is bidirectional and marked without polarity band. Leads are pure tin-plated, solderable per J-STD-002, and meet JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional avalanche junction | No functional polarity - either terminal serves as input/output for transient energy absorption in AC or DC systems |
| Lead 1 / Lead 2 | Current path terminals | Leads conduct surge current into PCB copper; thermal performance depends on 0.375" lead length and 16mm × 16mm copper pad area |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and mechanical shock per stress test plan |
| ISO 7637-2 compliance | Meets Pulse 1 (inductive load disconnect), Pulse 2a/2b (battery line transients), and Pulse 3a/3b (switching noise) immunity requirements |
| Low dynamic impedance | Enables tight clamping ratio (VC/VBR ≈ 1.59) and minimal voltage overshoot during high-di/dt events |
| Halogen-free & RoHS | Complies with IEC 61249-2-21 and EU RoHS Directive 2011/65/EU for environmentally constrained applications |
| 175°C junction rating | Supports placement near heat-generating components (e.g., MOSFETs, DC-DC converters) without derating penalties |
Applications
| Automotive Power Distribution | Industrial DC Bus Protection |
|---|---|
Use Scenario: Protecting fuse boxes, junction modules, and battery management systems from load dump pulses up to 120V in 24V commercial vehicles. IC Role / Device Role / Timing Role: Primary surge shunt element placed directly across main power input, clamping transients within 5ns before reaching downstream regulators and microcontrollers. Use Value: Limits peak voltage to ≤631V during 10/1000μs 1500W surges, preventing latch-up or gate oxide rupture in 40V-rated power ICs. |
Use Scenario: Safeguarding programmable logic controllers (PLCs) and motor drives connected to 400V DC industrial power supplies. IC Role / Device Role / Timing Role: Standoff protector on DC input rail, absorbing repetitive switching transients from contactors and IGBT inverters. Use Value: Maintains 356V working voltage margin while clamping 440V breakdown events-enabling compatibility with 450V-rated electrolytic capacitors and SiC gate drivers. |
| LED Streetlight Driver Input | Telecom Power Shelf Input |
Use Scenario: Front-end protection for outdoor LED drivers exposed to lightning-induced surges on AC mains and DC output lines. IC Role / Device Role / Timing Role: Bidirectional TVS placed after bridge rectifier but before bulk capacitor, suppressing both differential and common-mode transients. Use Value: Withstands 1500W single-event surges and maintains <1μA leakage above 356V, minimizing standby power loss in energy-efficient luminaires. |
Use Scenario: Input-stage transient suppression in 48V telecom rectifier shelves subjected to hot-swap and cable discharge events. IC Role / Device Role / Timing Role: First-line defense against ESD and EFT per IEC 61000-4-2/4-4, located upstream of DC-DC converters and PMBus controllers. Use Value: Delivers 631V clamping at 2.4A with <5ns response-meeting GR-1089-CORE Level 3 surge immunity for central office equipment. |
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 SMAJ440CA | Same 440V VBR range, 1500W PPK, but SMA package (surface-mount); lower thermal mass and no axial leads | Requires PCB re-layout for SMD footprint; unsuitable for through-hole prototyping or high-current leaded traces | Select when board space is constrained and automated assembly is used; verify thermal relief pad design for 5W dissipation |
| ON Semiconductor 1.5SMC440CA | Identical DO-201 package and 440V rating, but rated for 1500W at 10/1000μs with VC = 631V; RoHS-compliant, non-halogen | Functionally interchangeable in existing DO-201 footprints; same ISO 7637-2 compliance and AEC-Q101 qualification available | Drop-in replacement where Taiwan Semiconductor supply continuity is a concern; verify date code and lot traceability alignment |
Compared with 1.5KE440CA, SMAJ440CA offers surface-mount flexibility but sacrifices axial thermal conduction, while 1.5SMC440CA provides identical form-factor compatibility and qualification-making it the preferred alternative for legacy DO-201 designs requiring second-source assurance.
Availability
1.5KE440CA is available at Aetrix Electronics and suitable for automotive power distribution, industrial DC bus protection, LED driver inputs, and telecom power shelf applications requiring stable component supply and AEC-Q101-qualified surge immunity.
Supply support for 1.5KE440CA 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 with global distribution and AEC-Q101 validation capabilities.
The 1.5KE series was developed specifically for high-reliability transient suppression in automotive and industrial environments, emphasizing robust surge handling, wide temperature operation, and compliance with ISO 7637-2 and RoHS standards.
FAQ
What is the clamping voltage of the 1.5KE440CA under a 10/1000μs surge?
The 1.5KE440CA has a maximum clamping voltage (VC) of 631V at a peak impulse current (IPP) of 2.4A for the standardized 10/1000μs waveform. This value is measured per JEDEC test conditions and ensures predictable overvoltage limiting during real-world transients such as load dump or inductive switching events. The 1.5KE440CA maintains this clamping performance across its full operating temperature range.
Is the 1.5KE440CA suitable for automotive applications?
Yes, the 1.5KE440CA is AEC-Q101 qualified and explicitly designed for automotive use. It meets ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b immunity requirements, supports junction temperatures up to +175°C, and uses halogen-free, RoHS-compliant materials. These attributes make the 1.5KE440CA appropriate for engine control units, body control modules, and battery management systems in passenger and commercial vehicles.
How does the 1.5KE440CA differ from unidirectional variants like 1.5KE440A?
The 1.5KE440CA is bidirectional, meaning it provides symmetrical clamping in both polarities with identical VBR (396–484V), VC (602V for 1.5KE440A vs. 631V for 1.5KE440CA), and leakage behavior. In contrast, 1.5KE440A is unidirectional and includes a cathode band marking. The 1.5KE440CA replaces two unidirectional devices in AC-coupled or floating DC systems and is required for applications needing protection against reverse-polarity transients.
What is the maximum steady-state power dissipation for the 1.5KE440CA?
The 1.5KE440CA has a steady-state power dissipation (PD) rating of 5W when mounted with 0.375" (9.5mm) lead lengths on a 16mm × 16mm copper pad at TL = 75°C. This rating assumes proper PCB thermal design and is distinct from its 1500W peak pulse rating. Exceeding 5W continuously will cause thermal runaway; designers must ensure ambient and trace thermal resistance keep TJ ≤ 175°C.
Does the 1.5KE440CA have a specified junction capacitance?
No junction capacitance (CJ) value is specified for the 1.5KE440CA in the provided documentation. While Figure 5 shows typical CJ curves for lower-voltage 1.5KE devices (e.g., <100V), the datasheet omits CJ data for 440V-rated parts. For high-frequency ESD or RF-coupled transient analysis, designers should rely on measured clamping waveforms or select lower-capacitance alternatives like SOD-323 TVS diodes if signal integrity is critical.
1.5KE440CA 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):
- 376V
- Voltage - Breakdown (Min):
- 418V
- Voltage - Clamping (Max) @ Ipp:
- 602V
- Current - Peak Pulse (10/1000µs):
- 2.5A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-201
1.5KE440CA FAQ
1.How can I place an order for 1.5KE440CA through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE440CA 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 1.5KE440CA reliable?
The price and inventory of 1.5KE440CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE440CA is usually 5 days.
3.What payment methods are accepted for 1.5KE440CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE440CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE440CA?
1.5KE440CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE440CA 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 1.5KE440CA?
For technical support, including 1.5KE440CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE440CA requirements.
6.How does Aetrix verify that 1.5KE440CA is sourced from the original manufacturer or authorized distributors?
All 1.5KE440CA 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 1.5KE440CA meets industry standards.
7.What is the process for return or replacement of 1.5KE440CA?
All 1.5KE440CA units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE440CA, 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 1.5KE440CA part is unused and in its original packaging.
Return procedure for 1.5KE440CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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