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Taiwan Semiconductor Corporation 1.5KE350
- Part No.:
- 1.5KE350
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE350.pdf
- Description:
- 1500W, 350V, 10%, UNIDIRECTIONAL
- Quantity:
- Payment:
- Shipping:
Inventory:8,792
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Product details
Overview
1.5KE350 from Taiwan Semiconductor is a unidirectional 1500W transient voltage suppressor (TVS) diode in DO-201 package, with nominal breakdown voltage 350V, clamping voltage 504V at 3.1A peak impulse current, and working stand-off voltage 284V. It protects automotive and industrial power rails against ISO 7637-2 Pulse 1/2a/2b/3a/3b transients.
For engineers reviewing the 1.5KE350 datasheet, 1.5KE350 pinout, 1.5KE350 application, or 1.5KE350 equivalent, this TVS diode delivers verified 1500W surge capability at 10/1000μs, sub-1ps response time for unidirectional operation, and AEC-Q101 qualification options - critical for ESD and load-dump protection in harsh environments.
Technical Context
The 1.5KE350 operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its 315–385V breakdown range (tested at 1mA). Its low dynamic impedance ensures rapid clamping to 504V under 3.1A 10/1000μs surge, limiting energy dissipation in protected circuits.
It features <1μA leakage above 10V, junction temperature range of –55°C to +175°C, and meets UL 94V-0 flammability rating. Polarity is marked by cathode band; pure tin-plated leads comply with J-STD-002 solderability and JESD 201 Class 2 whisker resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR @ IT = 1mA | 315–385V - defines precise avalanche initiation threshold for reliable overvoltage triggering |
| VWM | 284V - maximum continuous reverse operating voltage before leakage rises significantly |
| VC @ IPP = 3.1A | 504V - clamped voltage during 10/1000μs surge, determining protected circuit's peak stress level |
| PPK | 1500W - peak pulse power handling capacity, enabling robust protection against automotive load dump |
| IPP | 3.1A - maximum non-repetitive peak impulse current at rated clamping voltage |
| TJ max | +175°C - maximum junction temperature, supporting operation in under-hood automotive environments |
| Response time | <1.0ps - ultrafast turn-on from 0V to VBR, critical for suppressing ESD and fast transients |
Pinout & Package
Package: DO-201 axial leaded package with cathode band marking; 0.090g mass; UL 94V-0 molding compound; pure tin-plated leads compliant with J-STD-002 and JESD 201 Class 2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction path / low-impedance return during clamping | Connected to system ground or low-side reference; carries full surge current during transient |
| Cathode | Reverse-biased input / high-voltage protection node | Connected to protected line (e.g., 24V rail); avalanche conduction begins here at VBR |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified option available | Validated for automotive-grade reliability including temperature cycling, HTRB, and mechanical shock |
| 1500W peak pulse power (10/1000μs) | Withstands ISO 7637-2 Pulse 5a (load dump) up to 120V on 24V systems without failure |
| Clamping ratio VC/VBR ≈ 1.42 | Low overvoltage margin ensures downstream ICs remain within absolute maximum ratings during clamping |
| Leakage current <1μA @ VWM | Minimizes standby power loss and avoids false triggering in high-impedance sensing circuits |
| DO-201 mechanical robustness | Supports manual and automated through-hole assembly; withstands 260°C soldering per J-STD-020 |
Applications
| Automotive Power Rail Protection | Industrial DC Power Input |
|---|---|
Use Scenario: 24V battery-fed control module exposed to ISO 7637-2 Pulse 5a (load dump) up to 120V. IC Role / Device Role / Timing Role: Unidirectional TVS placed between 24V rail and chassis ground to clamp transients before they reach PMIC and MCU. Use Value: Limits rail voltage to ≤504V during 3.1A surge, preventing latch-up or gate oxide damage in downstream 36V-rated regulators. |
Use Scenario: 48V telecom power supply input subjected to lightning-induced surges per IEC 61000-4-5. IC Role / Device Role / Timing Role: Primary-level TVS on DC input stage, coordinated with MOV and fuse for staged overvoltage defense. Use Value: Absorbs 1500W surge energy in <1ps, reducing stress on secondary-stage filtering and enabling smaller bulk capacitor selection. |
| LED Driver Overvoltage Clamp | Motor Control Board ESD Suppression |
Use Scenario: Constant-current LED driver in streetlight fixture experiencing inductive kickback from relay switching. IC Role / Device Role / Timing Role: TVS connected across output terminals to shunt flyback energy away from LED string and driver IC. Use Value: Clamps voltage to 504V before LED forward voltage derating limit is exceeded, preserving luminous efficacy and lifetime. |
Use Scenario: H-bridge gate driver board in HVAC blower motor exposed to ESD events during field service. IC Role / Device Role / Timing Role: TVS on logic-level enable lines and bootstrap supply inputs to protect CMOS inputs from ±8kV contact discharge. Use Value: Sub-1ps response prevents latch-up in gate drivers; <1μA leakage avoids signal integrity degradation in high-impedance control paths. |
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 range (315–385V), but 400W PPK; DO-214AC (SMA) package vs. DO-201 | Lower surge rating limits use to non-load-dump scenarios; surface-mount only | Select when board space constraints require SMD and surge energy is ≤400W |
| ON Semiconductor 1N6298 | Identical 130V nominal rating family; 1.5KE350 has 350V nominal, 1N6298 is 130V - not voltage-compatible | Not interchangeable due to 220V VBR gap; requires full circuit revalidation | Avoid unless redesigning protection network for lower-voltage rail |
Compared with SMAJ350A, the 1.5KE350 provides 3.75× higher surge power handling and through-hole mounting flexibility; compared with 1N6298, it serves fundamentally different voltage domains - making 1.5KE350 irreplaceable for 284V stand-off, 504V clamping 24V/48V system protection.
Availability
1.5KE350 is available at Aetrix Electronics and suitable for automotive electronics, industrial power supplies, and LED lighting systems requiring stable component supply with AEC-Q101 traceability and long-term lifecycle support.
Supply support for 1.5KE350 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 automotive, industrial, and consumer markets since 1979.
The 1.5KE series was designed specifically for high-energy transient suppression in automotive and industrial environments, emphasizing AEC-Q101 compliance, high-temperature reliability, and standardized DO-201 form factor for legacy and new designs.
FAQ
What is the breakdown voltage tolerance for 1.5KE350?
The 1.5KE350 has a guaranteed breakdown voltage range of 315V to 385V when tested at 1mA DC current, per JEDEC specification. This ±10% tolerance ensures consistent clamping behavior across production lots and supports robust design margins for 24V and 48V systems where 284V working voltage must be reliably maintained.
Is 1.5KE350 unidirectional or bidirectional?
The 1.5KE350 is a unidirectional TVS diode, indicated by absence of "CA" suffix and presence of cathode band marking. It conducts only in reverse bias during overvoltage events and blocks forward current up to 3.5V at 50A - confirmed in the Absolute Maximum Ratings table for uni-directional devices.
Does 1.5KE350 meet AEC-Q101 requirements?
AEC-Q101 qualification is available for 1.5KE350 variants with "H" suffix (e.g., 1.5KE350H), as stated in the Ordering Information section. Standard 1.5KE350 is not automatically AEC-Q101 qualified; users must specify the "H" version for automotive-grade stress testing compliance.
What is the clamping voltage of 1.5KE350 at its rated surge current?
The 1.5KE350 clamps to a maximum of 504V when subjected to its rated 3.1A peak impulse current (IPP) under the standard 10/1000μs waveform. This value is measured per Fig.3 in the datasheet and defines the upper voltage limit imposed on protected circuitry during worst-case surge events.
Can 1.5KE350 replace 1.5KE330 in an existing design?
No - 1.5KE350 has higher VBR (315–385V) and VWM (284V) than 1.5KE330 (VBR = 297–363V, VWM = 267V). Substituting 1.5KE350 may leave the circuit unprotected during transients below 315V, as clamping does not initiate until higher voltage is reached. Always verify VWM compatibility with system operating voltage.
1.5KE350 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):
- 284V
- Voltage - Breakdown (Min):
- 315V
- Voltage - Clamping (Max) @ Ipp:
- 504V
- Current - Peak Pulse (10/1000µs):
- 3.1A
- 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
1.5KE350 FAQ
1.How can I place an order for 1.5KE350 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE350 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 1.5KE350 reliable?
The price and inventory of 1.5KE350 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE350 is usually 5 days.
3.What payment methods are accepted for 1.5KE350?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE350 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE350?
1.5KE350 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE350 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 1.5KE350?
For technical support, including 1.5KE350 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE350 requirements.
6.How does Aetrix verify that 1.5KE350 is sourced from the original manufacturer or authorized distributors?
All 1.5KE350 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 1.5KE350 meets industry standards.
7.What is the process for return or replacement of 1.5KE350?
All 1.5KE350 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE350, 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 1.5KE350 part is unused and in its original packaging.
Return procedure for 1.5KE350:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE350 Tags
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