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Taiwan Semiconductor Corporation 1.5KE440A
- Part No.:
- 1.5KE440A
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE440A.pdf
- Description:
- TVS DIODE 376VWM 602VC DO201
- Quantity:
- Payment:
- Shipping:
Inventory:1,308
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Product details
Overview
1.5KE440A from Taiwan Semiconductor is a unidirectional 1500W transient voltage suppressor (TVS) diode with a nominal breakdown voltage of 440V, clamping voltage of 602V at 2.5A peak impulse current, and DO-201 axial package. It delivers robust ESD and surge protection for high-voltage industrial power rails and automotive load-dump scenarios.
For engineers reviewing the 1.5KE440A datasheet, 1.5KE440A pinout, 1.5KE440A application, or 1.5KE440A equivalent, this page provides verified electrical parameters, clamping behavior under 10/1000μs transients, thermal derating curves, polarity marking guidance, and direct alternatives for high-voltage TVS selection.
Technical Context
The 1.5KE440A operates as a unidirectional avalanche diode, triggering when reverse voltage exceeds its 418–462V breakdown range (tested at 1mA). Its low dynamic impedance ensures rapid clamping response (<1.0ps rise time from 0V to VBR) and stable energy absorption during 10/1000μs surges up to 1500W.
Designed for high-reliability environments, it meets ISO 7637-2 Pulse 1/2a/2b/3a/3b immunity requirements and supports AEC-Q101 qualification (H-suffix variants). Junction temperature spans −55°C to +175°C, with steady-state power dissipation rated at 5W on 16mm × 16mm copper pads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR @ IT = 1mA | 418–462V - Confirmed breakdown range defining reliable turn-on threshold for overvoltage events |
| VWM | 376V - Maximum continuous reverse working voltage; system must operate below this to avoid leakage |
| VC @ IPP = 2.5A | 602V - Clamped voltage during 10/1000μs surge; defines worst-case voltage seen by protected IC |
| PPK | 1500W - Peak pulse power handling per single non-repetitive 1ms event, derated above 25°C ambient |
| IFSM | 200A - Forward surge current rating (8.3ms half-sine), critical for inductive switch-off protection |
| Junction Temp Range | −55°C to +175°C - Enables deployment in under-hood automotive or industrial power converter environments |
| Package | DO-201 - Axial-leaded, UL 94V-0 molded case with tin-plated leads compliant to J-STD-002 solderability |
Pinout & Package
DO-201 package: axial leaded, cylindrical epoxy body with cathode band marking (band denotes cathode terminal). Leads are pure tin-plated, RoHS-compliant, and halogen-free per IEC 61249-2-21.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Ground-reference terminal | Connected to system ground or low-side return path; conducts during forward surge events |
| Cathode | High-side protection node | Connected to protected line (e.g., 400V DC bus); blocks normal operation, avalanches during overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| 1500W surge capability | Handles single 10/1000μs transients up to 1500W without degradation-sufficient for ISO 7637-2 Pulse 5a (load dump) |
| Clamping voltage ≤602V | Limits voltage stress on downstream 600V-rated MOSFETs or rectifiers during 2.5A surge events |
| Leakage current <1μA @ 376V | Minimizes standby power loss in high-impedance monitoring circuits or battery-backed systems |
| AEC-Q101 qualified option | H-suffix variant available for automotive-grade reliability validation (e.g., 1.5KE440AH) |
| Fast response time <1.0ps | Ensures protection activation before sensitive gate drivers or controllers experience overvoltage damage |
Applications
| Industrial Power Supply Input Protection | Automotive Load-Dump Suppression |
|---|---|
Use Scenario: 400V DC input stage of industrial SMPS exposed to lightning-induced surges and switching transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between HV rail and chassis ground to clamp transients before they reach PFC controller or primary-side MOSFET. Use Value: Clamps 10/1000μs surges to ≤602V, protecting 600V-rated silicon carbide MOSFETs and maintaining system uptime under IEC 61000-4-5 Level 4 stress. |
Use Scenario: 24V/48V commercial vehicle alternator output line subject to ISO 7637-2 Pulse 5a (load dump up to 60V). IC Role / Device Role / Timing Role: TVS mounted across battery feed to absorb 120V/200ms transients generated when alternator field is interrupted. Use Value: Absorbs 1500W peak energy without failure, preventing latch-up or destruction of CAN transceivers and microcontrollers downstream. |
| High-Voltage Motor Drive DC Bus Clamp | Telecom Rectifier Output Protection |
Use Scenario: 400V DC link in servo drive where IGBT switching induces dv/dt spikes exceeding 500V. IC Role / Device Role / Timing Role: Unidirectional clamp referenced to negative rail, shunting overshoots caused by stray inductance in high-current paths. Use Value: Limits voltage excursions to 602V, avoiding overvoltage lockout in gate drivers and preserving IGBT safe operating area (SOA). |
Use Scenario: Output of -48V telecom rectifier module exposed to hot-swap transients and relay bounce. IC Role / Device Role / Timing Role: TVS placed between output and return to suppress fast-rising edge transients during plug-in events. Use Value: Sub-1ps response prevents >376V stress on -48V DC-DC converters, ensuring uninterrupted service in 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 SMAJ440A | Same 440V VBR, but 400W rating (SMA package); lower clamping voltage (593V @ 2.5A) | Lower power handling limits use to sub-1kW surge environments; unsuitable for ISO 7637-2 Pulse 5a | Select only if board space constraints prohibit DO-201 and surge energy is ≤400W |
| ON Semiconductor 1N5388B | Zener-based (not avalanche TVS); 430V VZ, 5W steady-state only; no 1500W pulse rating | Not designed for transient suppression; intended for voltage regulation, not surge clamping | Not a functional alternative-lacks surge capability, clamping speed, and standardized waveform compliance |
Compared with 1.5KE440A, SMAJ440A offers smaller footprint but sacrifices 73% peak power capacity and fails to meet automotive load-dump requirements; 1N5388B is a regulator diode with no transient suppression function-neither serves as a drop-in replacement.
Availability
1.5KE440A is available at Aetrix Electronics and suitable for industrial power supplies, automotive electronics, motor drives, and telecom rectifier modules requiring stable component supply and long-term lifecycle support.
Supply support for 1.5KE440A 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 industrial, automotive, and consumer markets since 1979.
The 1.5KE series was developed specifically for high-energy transient suppression in harsh environments-emphasizing ruggedness, repeatable clamping, and compliance with ISO 7637-2 and AEC-Q101 standards.
FAQ
What is the maximum clamping voltage of the 1.5KE440A under standard test conditions?
The 1.5KE440A exhibits a maximum clamping voltage (VC) of 602V when subjected to a 10/1000μs surge waveform at IPP = 2.5A. This value is measured per JEDEC standards and defines the upper voltage limit imposed on protected circuitry during transient events. The 1.5KE440A maintains this clamping performance across its full operating temperature range.
Is the 1.5KE440A suitable for bidirectional transient protection?
No-the 1.5KE440A is a unidirectional TVS diode, designed only for reverse-biased overvoltage clamping. Bidirectional protection requires CA-suffixed variants (e.g., 1.5KE440CA) or separate back-to-back configurations. Using the 1.5KE440A in bidirectional applications risks forward conduction and failure during positive transients.
What does the 'A' suffix signify in 1.5KE440A?
The 'A' suffix in 1.5KE440A indicates tighter tolerance on breakdown voltage-specifically, a VBR range of 418–462V (±5%) versus the non-A version's wider 396–484V (±10%). This improves consistency in clamping threshold across production lots and simplifies design margining for precision protection schemes involving the 1.5KE440A.
Can the 1.5KE440A be used in automotive applications?
Yes-when ordered with the 'H' suffix (e.g., 1.5KE440AH), the device is AEC-Q101 qualified and validated for automotive under-hood use. The base 1.5KE440A meets ISO 7637-2 Pulse 1/2a/2b/3a/3b immunity requirements, but full automotive qualification requires the H-suffix variant and associated test documentation.
What is the thermal derating behavior of the 1.5KE440A above 25°C ambient?
The 1.5KE440A's peak pulse power (1500W) is linearly derated above 25°C ambient per Figure 2 in the datasheet: at 75°C, it retains ~70% capacity (~1050W); at 125°C, ~40% (~600W). Derating applies only to repetitive pulses; single-event capability remains intact up to TJ = 175°C, provided junction temperature limits are observed.
1.5KE440A 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):
- 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 ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-201
1.5KE440A FAQ
1.How can I place an order for 1.5KE440A through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE440A 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 1.5KE440A reliable?
The price and inventory of 1.5KE440A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE440A is usually 5 days.
3.What payment methods are accepted for 1.5KE440A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE440A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE440A?
1.5KE440A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE440A 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 1.5KE440A?
For technical support, including 1.5KE440A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE440A requirements.
6.How does Aetrix verify that 1.5KE440A is sourced from the original manufacturer or authorized distributors?
All 1.5KE440A 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 1.5KE440A meets industry standards.
7.What is the process for return or replacement of 1.5KE440A?
All 1.5KE440A units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE440A, 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 1.5KE440A part is unused and in its original packaging.
Return procedure for 1.5KE440A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE440A Tags
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