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STMicroelectronics 1.5KE350ARL
- Part No.:
- 1.5KE350ARL
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE350ARL.pdf
- Description:
- TVS DIODE 299VWM 618VC DO201
- Quantity:
- Payment:
- Shipping:
Inventory:1,600
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Product details
Overview
1.5KE350ARL from STMicroelectronics is a unidirectional 1500 W transient voltage suppression diode in DO-201 package, designed for high-energy surge protection with 350 V breakdown voltage (VBR = 332–368 V), 482 V clamping voltage (VCL) at 4 A peak pulse current, and 175 °C maximum junction temperature. It protects power supply inputs and telecom interfaces against IEC 61000-4-2 ESD (±30 kV) and IEC 61000-4-4 EFT (4 kV).
For engineers reviewing the 1.5KE350ARL datasheet, 1.5KE350ARL pinout, 1.5KE350ARL application, or 1.5KE350ARL equivalent, key selection criteria include unidirectional polarity, DO-201 axial lead package compatibility, 350 V standoff rating, 482 V clamping performance at 4 A, and compliance with UL 497B and IEC 61000-4-2/4-4 level 4.
Technical Context
This TVS diode uses planar junction technology to achieve low leakage (<4 µA at 285 V), stable VBR temperature coefficient (αT = 11 × 10−4/°C), and robust surge handling up to 1500 W (10/1000 µs) at Tj = 25 °C. Its unidirectional configuration enables DC-biased rail protection without reverse conduction during normal operation.
The device operates across −55 °C to +175 °C junction temperature range and maintains clamping integrity under repeated surges due to low dynamic resistance (RD = 4.0 Ω) and high thermal stability-critical for industrial SMPS and telecom line cards exposed to lightning-induced transients.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (10/1000 µs) | 1500 W - sustains single high-energy surges typical of AC mains or telecom line faults |
| Breakdown Voltage VBR | 332–368 V at 1 mA - defines precise overvoltage trip threshold for 350 V nominal systems |
| Clamping Voltage VCL | 482 V at 4 A - limits downstream voltage stress during surge, enabling 500 V-rated components |
| Leakage Current IRM | ≤4 µA at 285 V - ensures minimal standby power loss and signal integrity in high-impedance circuits |
| Junction Temperature Range | −55 °C to +175 °C - supports operation in harsh environments including industrial motor drives and outdoor base stations |
| ESD Withstand (IEC 61000-4-2) | ±30 kV air/contact discharge - exceeds Level 4 immunity for front-panel connectors and Ethernet ports |
| Package | DO-201 - axial-leaded through-hole package with 0.876 g mass, compatible with wave soldering and manual repair |
Pinout & Package
1.5KE350ARL is a two-terminal unidirectional TVS diode in DO-201 package. The cathode is marked by a band on the body; anode is unmarked. Leads are matte tin-plated for solderability and RoHS compliance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction | Connects to system ground or low-side return path; enables clamping when cathode voltage exceeds VBR |
| Cathode | Current exit terminal during reverse avalanche | Connects to protected line (e.g., DC input rail); conducts surge current to ground when transient exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| High Surge Rating | 1500 W (10/1000 µs) - protects against sustained line surges in AC/DC adapters and PoE injectors |
| Low Dynamic Resistance | RD = 4.0 Ω - minimizes VCL rise under high-current transients, improving protection margin |
| High-Temperature Operation | Tjmax = 175 °C - maintains reliability in enclosed power supplies and automotive under-hood modules |
| UL 497B Certification | File QVGQ2.E136224 - validates suitability for primary-side telecom and data line protection per safety standards |
| IEC 61000-4-4 Level 4 Compliance | 4 kV fast transient burst - ensures immunity in industrial control cabinets with relay switching noise |
Applications
| Industrial Power Supply Input Protection | Telecom Line Card Surge Suppression |
|---|---|
Use Scenario: Protects AC/DC converter inputs against lightning-induced surges on 230 VAC mains lines. IC Role / Device Role / Timing Role: Unidirectional TVS clamps positive transients to ground while blocking reverse leakage during normal operation. Use Value: Limits peak voltage to ≤482 V during 4 kA surge events, preventing damage to bridge rectifiers and bulk capacitors. |
Use Scenario: Shields RJ45 Ethernet PHY interfaces on DSLAM line cards from induced surges on twisted-pair copper lines. IC Role / Device Role / Timing Role: Fast-acting avalanche diode suppresses sub-microsecond transients before they reach sensitive PHY ICs. Use Value: Withstands ±30 kV ESD per IEC 61000-4-2 and clamps 4 kV EFT bursts to safe levels for 100BASE-TX receivers. |
| Automotive Body Control Module (BCM) Power Rail | Medical Equipment AC Mains Filter Stage |
Use Scenario: Guards 12 V battery-fed microcontroller power rails against load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Unidirectional TVS absorbs energy from 12 V system transients without interfering with normal DC bias. Use Value: Operates reliably at 175 °C ambient, meeting under-hood thermal requirements while maintaining <4 µA leakage at 13.5 V. |
Use Scenario: Installed at medical device AC inlet to meet IEC 60601-1 4 kV surge immunity requirement. IC Role / Device Role / Timing Role: Primary overvoltage protector upstream of EMI filter and isolation transformer. Use Value: UL 497B certification ensures compliance with medical safety standards; DO-201 mechanical robustness supports long-term field reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ350A | 600 W rating, SMB surface-mount package, lower VCL (470 V @ 3.2 A) | Designed for space-constrained PCBs; lacks DO-201 mechanical ruggedness and higher surge headroom | Select when board area is limited and peak surge energy remains below 600 W |
| 1.5KE350A | Identical electrical specs and DO-201 package; differs only in packaging format (ammopack vs. reel) | No functional difference; same thermal and electrical behavior in circuit | Choose based on production assembly method-reel for automated placement, ammopack for manual or low-volume use |
Compared with SMBJ350A, 1.5KE350ARL delivers 2.5× higher surge power handling and axial-lead mechanical strength for high-reliability through-hole designs; versus 1.5KE350A, it offers identical protection performance with optimized reel packaging for high-volume SMT line integration.
Availability
1.5KE350ARL is available at Aetrix Electronics and suitable for industrial power supply input protection, telecom line card surge suppression, and automotive BCM power rail protection requiring stable component supply and full traceability.
Supply support for 1.5KE350ARL 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
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, delivering intelligent power, analog, MEMS, and microcontroller solutions for industrial, automotive, and consumer markets.
The 1.5KE series belongs to ST's high-power TVS diode portfolio, engineered specifically for robust transient suppression in mains-connected equipment, telecom infrastructure, and harsh-environment electronics where reliability under surge stress is critical.
FAQ
What is the polarity configuration of 1.5KE350ARL?
1.5KE350ARL is a unidirectional TVS diode, meaning it conducts only in reverse avalanche mode when cathode voltage exceeds breakdown threshold. It blocks current in forward direction like a standard diode, making it suitable for DC-biased protection applications such as power supply inputs and battery-fed circuits.
How does 1.5KE350ARL differ from bidirectional 1.5KE350CA?
1.5KE350ARL has unidirectional polarity with cathode marking and protects only against positive transients on the cathode side. In contrast, 1.5KE350CA is bidirectional and symmetrically clamps both positive and negative surges, making it appropriate for AC lines or differential signal paths where polarity reversal occurs.
Can 1.5KE350ARL be used in parallel for higher surge current handling?
No-parallel connection of discrete TVS diodes is not recommended due to mismatched VBR and dynamic resistance, causing uneven current sharing and potential thermal runaway. For higher current capability, select a single higher-rated device such as 3KP350A (3000 W) or verify derating with ST's application note AN4277.
What is the maximum continuous reverse working voltage (VRWM) for 1.5KE350ARL?
The maximum continuous reverse working voltage is 285 V, derived from the minimum VBR (332 V) minus 15% margin per industry practice. This ensures reliable blocking under steady-state conditions while retaining sufficient headroom for transient clamping at 350 V nominal systems.
1.5KE350ARL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- 1.5KE, TRANSIL™
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 299V
- Voltage - Breakdown (Min):
- 332V
- Voltage - Clamping (Max) @ Ipp:
- 618V
- Current - Peak Pulse (10/1000µs):
- 16A (8/20µs)
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 430pF @ 1MHz
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-201
1.5KE350ARL FAQ
1.How can I place an order for 1.5KE350ARL through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE350ARL 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 1.5KE350ARL reliable?
The price and inventory of 1.5KE350ARL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE350ARL is usually 5 days.
3.What payment methods are accepted for 1.5KE350ARL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE350ARL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE350ARL?
1.5KE350ARL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE350ARL 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 1.5KE350ARL?
For technical support, including 1.5KE350ARL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE350ARL requirements.
6.How does Aetrix verify that 1.5KE350ARL is sourced from the original manufacturer or authorized distributors?
All 1.5KE350ARL 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 1.5KE350ARL meets industry standards.
7.What is the process for return or replacement of 1.5KE350ARL?
All 1.5KE350ARL units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE350ARL, 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 1.5KE350ARL part is unused and in its original packaging.
Return procedure for 1.5KE350ARL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE350ARL Tags
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