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STMicroelectronics 1.5KE300ARL
- Part No.:
- 1.5KE300ARL
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE300ARL.pdf
- Description:
- TVS DIODE 256VWM 529VC DO201
- Quantity:
- Payment:
- Shipping:
Inventory:2,572
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Product details
Overview
1.5KE300ARL from STMicroelectronics is a unidirectional transient voltage suppression (TVS) diode in DO-201 package, designed for high-energy surge protection in power rails and signal lines. It features a 300 V standoff voltage (VRM), 414 V clamping voltage at 5.0 A peak pulse current (10/1000 µs), 1500 W peak pulse power rating, and operates up to 175 °C junction temperature - deployed in industrial AC/DC front-ends and telecom power supplies.
For engineers reviewing the 1.5KE300ARL datasheet, 1.5KE300ARL pinout, 1.5KE300ARL application, or 1.5KE300ARL equivalent, key selection criteria include clamping voltage margin vs. protected IC VMAX, IPP derating at elevated Tj, DO-201 thermal resistance under pulsed load, and compliance with IEC 61000-4-2 (30 kV contact/air) and IEC 61000-4-4 (4 kV level 4).
Technical Context
This unidirectional TVS diode uses planar silicon junction technology to achieve low leakage (<1 µA at 256 V VRM), stable VBR (256–285 V at 1 mA), and predictable clamping behavior across temperature (αT = 11 × 10−4/°C). Its DO-201 axial package supports high thermal mass and lead-to-case conduction paths critical for repetitive surge handling.
The device responds to fast transients with sub-nanosecond turn-on, delivering 414 V clamping at 5.0 A (10/1000 µs) and 529 V at 19 A (8/20 µs), while maintaining dynamic resistance of 11.3 Ω - enabling precise overvoltage limiting without excessive let-through energy to downstream circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Standoff Voltage (VRM) | 300 V - maximum continuous reverse operating voltage before breakdown; sets minimum system rail margin |
| Breakdown Voltage (VBR) | 256–285 V at 1 mA - defines precise conduction onset; tight tolerance enables accurate overvoltage thresholding |
| Clamping Voltage (VCL) | 414 V at 5.0 A (10/1000 µs) - peak voltage seen by protected circuit during surge; determines stress on downstream components |
| Peak Pulse Power (PPP) | 1500 W (10/1000 µs) - maximum single-event surge energy dissipation capability at 25 °C ambient |
| Junction Temperature Range | −55 to +175 °C - enables operation in harsh environments including industrial motor drives and outdoor power systems |
| Leakage Current (IRM) | ≤1 µA at VRM - ensures minimal standby power loss and no false triggering in high-impedance sensing circuits |
| Dynamic Resistance (RD) | 11.3 Ω - quantifies voltage rise per unit current increase; critical for modeling clamping behavior under varying surge amplitudes |
Pinout & Package
1.5KE300ARL is housed in a DO-201 axial through-hole package with cathode band marking. The package provides robust thermal performance (low RθJA under pulsed conditions) and mechanical reliability for high-vibration applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unmarked end) | Current entry terminal during forward conduction | Connected to ground or low-side return path; must handle 200 A non-repetitive surge (IFSM) |
| Cathode (banded end) | Current exit terminal during reverse avalanche | Connected to protected line; clamps transients by shunting current to ground when V > VBR |
Key Features
| Feature | Design Value |
|---|---|
| IEC 61000-4-2 ESD immunity | 30 kV air/contact discharge - exceeds Level 4, eliminating need for external ESD staging in industrial interfaces |
| High-temperature operation | 175 °C max junction temperature - enables placement near heat-generating components (e.g., MOSFETs, transformers) without derating |
| Low dynamic resistance | 11.3 Ω - minimizes clamping voltage overshoot during fast-rising surges (e.g., lightning-induced ring waves) |
| Matte tin lead finish | RoHS-compliant, whisker-resistant plating - ensures solder joint integrity and long-term reliability in automotive and telecom modules |
| UL 497B certification | QVGQ2.E136224 listing - validates suitability for primary-side surge protection in UL 60950-1/UL 62368-1 certified power supplies |
Applications
| Industrial AC/DC Power Supplies | Telecom Line Interface Protection |
|---|---|
Use Scenario: Surge protection on AC input stage of DIN-rail mounted 48 V DC power supplies exposed to utility grid transients and indirect lightning. IC Role / Device Role / Timing Role: Unidirectional TVS placed between L/N and PE to clamp common-mode surges before rectification and bulk capacitor charging. Use Value: 414 V clamping at 5 A prevents MOV degradation and avoids overvoltage stress on bridge rectifier and PFC controller ICs. | Use Scenario: Protection of RS-485 transceivers and Ethernet PHYs in outdoor base stations subjected to induced surges from nearby lightning strikes. IC Role / Device Role / Timing Role: TVS connected between differential pair and chassis ground to suppress common-mode transients without distorting signal integrity. Use Value: 11.3 Ω dynamic resistance ensures <10 ns response time, preserving signal edge rates up to 25 Mbps. |
| Motor Drive DC Bus Protection | Renewable Energy Inverter Input Stage |
Use Scenario: Overvoltage suppression on 300–400 V DC bus of variable frequency drives where IGBT switching causes voltage spikes and regenerative energy surges. IC Role / Device Role / Timing Role: TVS installed across bus capacitors to absorb short-duration energy bursts exceeding capacitor ripple rating. Use Value: 1500 W peak power rating handles repetitive 10/1000 µs events without thermal runaway at 175 °C junction temperature. | Use Scenario: Surge protection on PV string inputs of solar microinverters exposed to rapid voltage transients during cloud-edge effects and grid fault recovery. IC Role / Device Role / Timing Role: Unidirectional TVS placed between PV+ and ground to clamp positive-going transients while blocking reverse leakage during night-time operation. Use Value: ≤1 µA leakage at 300 V VRM prevents parasitic discharge of string capacitors, maintaining MPPT efficiency over 25-year field life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ300A | DO-214AA package; lower 600 W PPP rating; 432 V VCL at 3.5 A (10/1000 µs) | Smaller footprint but reduced thermal mass; unsuitable for repeated surges >100×/hour in high-ambient environments | Select when board space is constrained and surge duty cycle is light; verify thermal derating at 70 °C ambient |
| 1N5388B | Same DO-201 package; 300 V Zener; 5 W steady-state power only; no surge rating or IEC compliance data | Not rated for transient suppression; lacks clamping specification, dynamic resistance, or ESD test validation | Avoid for surge protection; use only for precision voltage reference or biasing where no transients occur |
Compared with SMBJ300A and 1N5388B, 1.5KE300ARL delivers 2.5× higher peak pulse power, validated IEC 61000-4-2/4-4 compliance, and guaranteed clamping performance up to 175 °C - making it the sole choice for mission-critical industrial and renewable energy applications requiring repeatable surge resilience.
Availability
1.5KE300ARL is available at Aetrix Electronics and suitable for industrial AC/DC power supplies, telecom line interface protection, and motor drive DC bus protection requiring stable component supply, full traceability, and long-lifecycle support.
Supply support for 1.5KE300ARL 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, designing and manufacturing analog, MCU, power, and sensor solutions for industrial, automotive, and consumer markets.
The 1.5KE series belongs to ST's high-power TVS portfolio, engineered specifically for robust, standards-compliant surge protection in high-reliability power conversion and communication infrastructure equipment.
FAQ
What is the maximum allowable surge current for 1.5KE300ARL at 100 °C junction temperature?
At Tj = 100 °C, the peak pulse power derates to approximately 1100 W (per Figure 3 in DS0636 Rev 5), supporting ~4.4 A (10/1000 µs) or ~15.5 A (8/20 µs). This is calculated using the published 10/1000 µs power vs. Tj curve and VCL temperature coefficient (αT = 11 × 10−4/°C), confirming safe operation in thermally demanding locations like enclosed power enclosures.
Can 1.5KE300ARL be used in bidirectional signal line protection?
No - 1.5KE300ARL is unidirectional (denoted by "A" suffix) and conducts only in reverse avalanche mode. For bidirectional protection (e.g., RS-485, USB), the CA variant (1.5KE300CA) must be used, which features symmetrical clamping in both polarities and identical VBR/VCL specs for ±300 V standoff.
How does the DO-201 package affect PCB layout for high-surge applications?
The DO-201 axial package requires ≥2.5 mm creepage/clearance spacing from adjacent traces and recommends ≥10 mm² copper pour per lead for thermal relief. Its 0.876 g mass and 25.4 mm body length provide superior thermal inertia versus SMD packages, reducing risk of solder joint fracture under repeated thermal cycling from surge events.
Is 1.5KE300ARL compliant with RoHS and REACH regulations?
Yes - 1.5KE300ARL carries STMicroelectronics' ECOPACK2 qualification, featuring matte tin lead finish and halogen-free molding compound. It meets RoHS Directive 2011/65/EU Annex II maximum concentration values and REACH SVHC thresholds, with full material declarations available via ST's product change notification (PCN) portal.
1.5KE300ARL 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):
- 256V
- Voltage - Breakdown (Min):
- 285V
- Voltage - Clamping (Max) @ Ipp:
- 529V
- Current - Peak Pulse (10/1000µs):
- 19A (8/20µs)
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 500pF @ 1MHz
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-201
1.5KE300ARL FAQ
1.How can I place an order for 1.5KE300ARL through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE300ARL 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 1.5KE300ARL reliable?
The price and inventory of 1.5KE300ARL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE300ARL is usually 5 days.
3.What payment methods are accepted for 1.5KE300ARL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE300ARL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE300ARL?
1.5KE300ARL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE300ARL 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 1.5KE300ARL?
For technical support, including 1.5KE300ARL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE300ARL requirements.
6.How does Aetrix verify that 1.5KE300ARL is sourced from the original manufacturer or authorized distributors?
All 1.5KE300ARL 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 1.5KE300ARL meets industry standards.
7.What is the process for return or replacement of 1.5KE300ARL?
All 1.5KE300ARL units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE300ARL, 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 1.5KE300ARL part is unused and in its original packaging.
Return procedure for 1.5KE300ARL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE300ARL Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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ESD5Z5.0T1G
onsemi
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Diodes Incorporated
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D12V0L1B2LP-7B
Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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