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STMicroelectronics 1.5KE250ARL
- Part No.:
- 1.5KE250ARL
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE250ARL.pdf
- Description:
- TVS DIODE 213VWM 442VC DO201
- Quantity:
- Payment:
- Shipping:
Inventory:7,324
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Product details
Overview
1.5KE250ARL from STMicroelectronics is a unidirectional Transil™ transient voltage suppression (TVS) diode in DO-201 package, designed for high-energy surge clamping in DC power lines and signal interfaces. It delivers 1500 W peak pulse power (10/1000 µs), has a breakdown voltage of 237 V (min) to 263 V (max) at 1 mA, clamps to ≤344 V at 5.0 A peak pulse current, and operates up to 175 °C junction temperature - used in industrial power supply input protection.
For engineers reviewing the 1.5KE250ARL datasheet, 1.5KE250ARL pinout, 1.5KE250ARL application, or 1.5KE250ARL equivalent, key selection criteria include clamping voltage vs. standoff voltage margin, unidirectional polarity requirement, DO-201 mechanical fit, and UL 497B certification for telecom surge protection compliance.
Technical Context
This TVS diode operates in avalanche breakdown mode to clamp transient overvoltages above its reverse standoff voltage (VRM = 213 V) while maintaining low leakage (<1 µA at VRM). Its fast response time (<1 ns) ensures protection before sensitive downstream MOSFETs or ICs experience overstress.
The device exhibits a voltage temperature coefficient (αT) of +11 mV/°C per volt, enabling predictable VBR drift across operating temperatures. Thermal resistance from junction to leads is 20 °C/W, supporting reliable surge handling on standard PCB layouts without forced cooling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 1500 W (10/1000 µs): Sustains single high-energy surges common in AC line transients or lightning-induced spikes. |
| Breakdown Voltage (VBR) | 237–263 V @ 1 mA: Defines precise avalanche onset threshold for accurate overvoltage triggering. |
| Clamping Voltage (VCL) | ≤344 V @ 5.0 A (10/1000 µs): Maximum voltage seen by protected circuit during rated surge event. |
| Standoff Voltage (VRM) | 213 V max: Ensures no conduction during normal operation, preserving system efficiency and noise floor. |
| Junction Temperature Range | −65 to +175 °C: Supports deployment in harsh environments including industrial motor drives and outdoor power converters. |
| Leakage Current | ≤1 µA @ 213 V: Minimizes standby power loss and avoids false triggering in high-impedance sensing circuits. |
| Package | DO-201 axial lead: Compatible with through-hole assembly and provides robust mechanical anchoring for vibration-prone applications. |
Pinout & Package
1.5KE250ARL uses a DO-201 package with two axial leads: cathode (banded end) and anode. The package meets UL94 V0 flammability rating and is lead-free per RoHS requirements.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line; conducts surge current to ground when voltage exceeds VBR. |
| Anode | Reference node | Tied to system ground or lower-potential rail; completes clamping path during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| Low clamping factor (VCL/VBR) | 1.45 typical: Enables tighter voltage margin between clamping and IC absolute maximum ratings. |
| UL 497B certified | QVGQ2.E136224: Validates suitability for primary-side surge protection in telecom and data line interfaces. |
| Fast response time | <1 ns: Reacts before most semiconductor failures occur, protecting gate oxides and ESD-sensitive logic. |
| High surge current capability | 200 A non-repetitive forward surge (10 ms): Handles repeated line-switching transients without degradation. |
| ECOPACK® compliant | Lead-free, halogen-free epoxy: Meets global environmental regulations without compromising thermal or electrical performance. |
Applications
| Industrial Power Supply Input Protection | DC Motor Drive Bus Clamping |
|---|---|
Use Scenario: 24–48 V DC input stage of programmable logic controllers exposed to inductive kickback and load dump. IC Role / Device Role / Timing Role: Unidirectional TVS placed between input rail and chassis ground to shunt transients before they reach upstream DC-DC converters. Use Value: Limits bus voltage to ≤344 V during 5 A surges, preventing damage to 40 V-rated MOSFETs and isolated gate drivers. |
Use Scenario: H-bridge motor driver with regenerative braking causing back-EMF spikes on 24 V bus. IC Role / Device Role / Timing Role: Standoff-rated clamping device across power rail to absorb energy from flyback diodes and prevent overvoltage latch-up. Use Value: Withstands 1500 W pulses without degradation, ensuring long-term reliability in cyclic industrial motion control systems. |
| Telecom Line Interface Protection | Renewable Energy Inverter DC Link |
Use Scenario: Secondary-side Ethernet or RS-485 interface powered from local 12 V supply, subject to induced surges from nearby AC wiring. IC Role / Device Role / Timing Role: Primary-level TVS on 12 V bias rail feeding PHY ICs and isolation transformers. Use Value: UL 497B listing confirms compliance with telecom surge immunity standards (IEC 61000-4-5 Level 4), reducing certification effort. |
Use Scenario: DC link between PV array and MPPT converter in solar microinverters, where partial shading causes rapid voltage transients. IC Role / Device Role / Timing Role: Overvoltage clamp on high-voltage DC bus (up to 250 V) to protect IGBT gate drivers and sensing amplifiers. Use Value: 175 °C max junction temperature enables direct mounting near heat-generating power stages without derating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ250A | Lower peak power (600 W), smaller SMB package, same VBR range (237–263 V) | Suitable only for lower-energy surges; not UL 497B certified | Select when board space is constrained and surge threat level is limited to IEC 61000-4-4. |
| 1N6285 | Same DO-201 package, 1500 W rating, but higher VBR (250–278 V) and looser tolerance | Lacks UL 497B listing; wider VCL spread (375 V max) | Acceptable for cost-sensitive industrial designs where certification is not required. |
Compared with SMBJ250A and 1N6285, 1.5KE250ARL offers superior surge margin (1500 W), tighter clamping (344 V), and UL 497B validation - making it preferred for certified telecom and industrial power applications demanding repeatable, high-energy protection.
Availability
1.5KE250ARL is available at Aetrix Electronics and suitable for industrial power supply input protection, DC motor drive bus clamping, and telecom line interface protection requiring stable component supply and full production lifecycle support.
Supply support for 1.5KE250ARL 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, power, MCU, and sensor solutions for industrial, automotive, and consumer markets.
1.5KE250ARL belongs to ST's Transil™ TVS diode family, engineered specifically for high-reliability transient suppression in harsh electromagnetic environments - emphasizing robustness, precision clamping, and regulatory compliance.
FAQ
What is the maximum allowable standoff voltage for 1.5KE250ARL in continuous operation?
The maximum reverse standoff voltage (VRM) is 213 V, verified per Table 3 of ST's Doc ID 2913 Rev 4. Operating above this value risks premature conduction and accelerated wear; design margin should maintain ≥10% below VRM under worst-case temperature and tolerance conditions.
Does 1.5KE250ARL require heatsinking for 1500 W surge handling?
No external heatsink is required for single 10/1000 µs surges, as the device's thermal mass and low Rth(j-l) of 20 °C/W allow safe energy dissipation within its 175 °C junction limit. Repeated surges demand PCB copper area ≥100 mm² per lead to avoid cumulative heating.
How does temperature affect the breakdown voltage of 1.5KE250ARL?
VBR increases linearly with junction temperature at +11 mV/°C per volt (αT = +11 × 10⁻³/°C), per Table 3 footnote 2. At 100 °C, VBR rises ~8.3 V above its 25 °C value - critical for designs operating near thermal limits or requiring tight voltage margins.
Is 1.5KE250ARL compatible with lead-free reflow soldering processes?
Yes - the DO-201 package is qualified for lead-free soldering with a maximum lead temperature of 230 °C for 10 seconds at 5 mm from case (Table 1), fully compliant with IPC/JEDEC J-STD-020D moisture sensitivity and reflow profiles.
1.5KE250ARL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- 1.5KE, TRANSIL™
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 213V
- Voltage - Breakdown (Min):
- 237V
- Voltage - Clamping (Max) @ Ipp:
- 442V
- Current - Peak Pulse (10/1000µs):
- 23A (8/20µs)
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 560pF @ 1MHz
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-201
1.5KE250ARL FAQ
1.How can I place an order for 1.5KE250ARL through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE250ARL 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 1.5KE250ARL reliable?
The price and inventory of 1.5KE250ARL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE250ARL is usually 5 days.
3.What payment methods are accepted for 1.5KE250ARL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE250ARL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE250ARL?
1.5KE250ARL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE250ARL 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 1.5KE250ARL?
For technical support, including 1.5KE250ARL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE250ARL requirements.
6.How does Aetrix verify that 1.5KE250ARL is sourced from the original manufacturer or authorized distributors?
All 1.5KE250ARL 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 1.5KE250ARL meets industry standards.
7.What is the process for return or replacement of 1.5KE250ARL?
All 1.5KE250ARL units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE250ARL, 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 1.5KE250ARL part is unused and in its original packaging.
Return procedure for 1.5KE250ARL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE250ARL 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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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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