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Taiwan Semiconductor Corporation 1.5KE350A
- Part No.:
- 1.5KE350A
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE350A.pdf
- Description:
- TVS 1500W 350.5V 5% UNIDIR DO-20
- Quantity:
- Payment:
- Shipping:
Inventory:9,867
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Product details
Overview
1.5KE350A from Taiwan Semiconductor is a unidirectional 1500W transient voltage suppressor (TVS) diode in DO-201 package, with nominal breakdown voltage 350V, clamping voltage 482V at 3.2A peak impulse current, and working stand-off voltage 300V. It protects automotive and industrial power rails against ISO 7637-2 Pulse 1/2a/2b/3a/3b transients.
For engineers reviewing the 1.5KE350A datasheet, 1.5KE350A pinout, 1.5KE350A application, or 1.5KE350A equivalent, this page delivers verified electrical parameters, mechanical package data, real-world protection use cases, and validated alternative parts for high-voltage surge suppression design.
Technical Context
The 1.5KE350A operates as a unidirectional avalanche diode, triggering when reverse voltage exceeds its 333–368V breakdown range at 1mA test current. Its low dynamic impedance enables rapid clamping to 482V under 10/1000μs surge, limiting energy dissipation in downstream circuitry.
Designed for automotive-grade reliability, it meets AEC-Q101 qualification (when ordered with "H" suffix), supports junction temperatures from –55°C to +175°C, and exhibits <1μA leakage above 10V - critical for low-power standby circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR min/max | 333 V / 368 V at 1 mA - defines precise avalanche onset window for predictable overvoltage trip point |
| VWM | 300 V - maximum continuous reverse operating voltage before leakage rises significantly |
| VC @ IPP | 482 V at 3.2 A - clamped voltage during 10/1000μs surge, determining protected IC's voltage stress margin |
| PPK | 1500 W - peak pulse power handling capability per JEDEC standard waveform |
| IPP | 3.2 A - maximum non-repetitive peak impulse current the device safely clamps |
| TJ max | +175 °C - maximum junction temperature enabling operation in under-hood automotive environments |
| Package | DO-201 - industry-standard axial-leaded package with tin-plated leads, UL 94V-0 molding compound |
Pinout & Package
DO-201 package: axial-leaded, cylindrical epoxy body with cathode band marking. Leads are pure tin-plated, solderable per J-STD-002; polarity is marked by cathode band on unidirectional devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to system ground or low-side return path; conducts during forward surge events (e.g., reverse battery) |
| Cathode | Avalanche clamping terminal | Connected to protected line (e.g., 24V rail); blocks at VWM, avalanches above VBR to clamp transients |
Key Features
| Feature | Design Value |
|---|---|
| 1500W surge rating | Handles ISO 7637-2 Pulse 5a (load dump) without failure in 24V systems |
| Clamping voltage 482V | Ensures protected 300V-rated components remain below absolute maximum ratings during 10/1000μs surges |
| Leakage <1 μA @ VWM | Minimizes standby power loss in always-on automotive modules (e.g., CAN gateway, body control units) |
| AEC-Q101 qualified option | Validated for automotive under-hood applications requiring extended temperature and lifetime reliability |
| Fast response time | Sub-nanosecond turn-on (<1 ps) ensures clamping initiates before sensitive ICs experience overvoltage damage |
Applications
| Automotive Power Rail Protection | Industrial DC Power Input |
|---|---|
Use Scenario: Protecting 24V supply lines in engine control units (ECUs) against load dump and inductive switching transients per ISO 7637-2. IC Role / Device Role / Timing Role: Unidirectional TVS placed between 24V rail and chassis ground to shunt surge energy before it reaches power management ICs. Use Value: Limits voltage to ≤482V during 10/1000μs surges, preserving integrity of 500V-rated MOSFETs and LDO regulators downstream. | Use Scenario: Safeguarding programmable logic controller (PLC) 24V DC inputs from field-wiring induced transients in factory automation. IC Role / Device Role / Timing Role: Standoff protector on DIN-rail power feed, absorbing repetitive EFT bursts (IEC 61000-4-4) and lightning-induced surges. Use Value: Maintains <1μA leakage at 300V, preventing false tripping of input sensing circuitry while clamping 3.2A impulses. |
| LED Driver Overvoltage Clamp | Telecom DC Feeder Protection |
Use Scenario: Shielding constant-current LED drivers in street lighting from grid-switching transients and nearby lightning strikes. IC Role / Device Role / Timing Role: Primary clamping element across output terminals, activated only during overvoltage events exceeding 300V. Use Value: Withstands 1500W pulses without degradation, ensuring >10-year field life in outdoor deployments with minimal maintenance. | Use Scenario: Protecting -48V telecom power distribution boards from accidental AC cross-connects and induced surges on long cable runs. IC Role / Device Role / Timing Role: Bidirectional-capable variant (1.5KE350CA) used across -48V and return, but 1.5KE350A serves unidirectional DC feeder legs. Use Value: Clamps to 482V within nanoseconds, preventing latch-up in PMICs and protecting Ethernet PHY power supplies. |
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 SMAJ350A | Same 350V VBR, 482V VC, but in smaller SMA package (lower PPK = 400W) | Not suitable for 1500W ISO 7637-2 Pulse 5a; limited to lower-energy ESD/EFT events | Select only if space-constrained and surge energy is ≤400W |
| ON Semiconductor 1.5SMC350A | Identical VBR (333–368V), VC = 482V, DO-214AB (SMC) package, same 1500W rating | Surface-mount alternative; requires PCB rework but enables automated assembly | Choose for SMT production lines where through-hole DO-201 is incompatible |
Compared with 1.5KE350A, SMAJ350A offers footprint reduction at the cost of 73% lower surge capacity, while 1.5SMC350A matches performance in an SMT package - enabling layout flexibility without compromising clamping behavior or thermal robustness.
Availability
1.5KE350A is available at Aetrix Electronics and suitable for automotive ECUs, industrial PLCs, LED street lighting controllers, and telecom DC power feeds requiring stable component supply across multi-year production cycles.
Supply support for 1.5KE350A 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 thyristors for automotive, industrial, and consumer markets.
The 1.5KE series was engineered specifically for high-energy transient suppression in harsh environments - delivering AEC-Q101-qualified reliability, consistent clamping performance, and robust DO-201 packaging for through-hole mounting in demanding applications.
FAQ
What is the breakdown voltage range of the 1.5KE350A?
The 1.5KE350A has a guaranteed breakdown voltage range of 333 V to 368 V at 1 mA test current, measured per ANSI/IEEE C62.35. This tight tolerance ensures consistent overvoltage triggering across production lots and temperature extremes, critical for repeatable protection in automotive 24V systems where 1.5KE350A is commonly deployed.
Is the 1.5KE350A bidirectional or unidirectional?
The 1.5KE350A is a unidirectional TVS diode, indicated by the absence of "C" or "CA" suffix. It conducts only in reverse bias above VBR; forward conduction occurs at ~3.5 V (per VF spec for VBR ≤ 200V, though 1.5KE350A uses 5.0 V max). For bidirectional protection, specify 1.5KE350CA - the 1.5KE350A itself is not rated for symmetrical clamping.
What is the maximum clamping voltage of the 1.5KE350A under surge conditions?
The 1.5KE350A clamps to a maximum of 482 V at 3.2 A peak impulse current (IPP) under the standardized 10/1000 μs double-exponential waveform. This value is measured per JEDEC test conditions and defines the upper voltage limit imposed on protected circuitry during worst-case transients - a key parameter for validating margin against downstream component ratings in designs using 1.5KE350A.
Does the 1.5KE350A meet automotive qualification standards?
The base 1.5KE350A is not AEC-Q101 qualified; however, the variant 1.5KE350AH (with "H" suffix) is AEC-Q101 certified. This qualification covers temperature cycling, humidity testing, and lifetime reliability validation for under-hood automotive use. Always verify ordering code suffixes - 1.5KE350A alone does not carry automotive qualification unless explicitly ordered as 1.5KE350AH.
What package type does the 1.5KE350A use, and what are its key mechanical features?
The 1.5KE350A uses the DO-201 axial-leaded package: cylindrical epoxy body with cathode band marking, pure tin-plated leads compliant with J-STD-002 solderability, UL 94V-0 flammability rating, and 0.090 g typical weight. Its lead length and thermal pad requirements (0.6" × 0.6" copper area) are defined in TSC's derating curves - essential for sustaining 1500W pulses in real 1.5KE350A implementations.
1.5KE350A 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):
- 300V
- Voltage - Breakdown (Min):
- 333V
- Voltage - Clamping (Max) @ Ipp:
- 482V
- Current - Peak Pulse (10/1000µs):
- 3.2A
- 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
1.5KE350A FAQ
1.How can I place an order for 1.5KE350A through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE350A 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 1.5KE350A reliable?
The price and inventory of 1.5KE350A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE350A is usually 5 days.
3.What payment methods are accepted for 1.5KE350A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE350A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE350A?
1.5KE350A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE350A 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 1.5KE350A?
For technical support, including 1.5KE350A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE350A requirements.
6.How does Aetrix verify that 1.5KE350A is sourced from the original manufacturer or authorized distributors?
All 1.5KE350A 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 1.5KE350A meets industry standards.
7.What is the process for return or replacement of 1.5KE350A?
All 1.5KE350A units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE350A, 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 1.5KE350A part is unused and in its original packaging.
Return procedure for 1.5KE350A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE350A Tags
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