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STMicroelectronics 1.5KE15ARL
- Part No.:
- 1.5KE15ARL
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE15ARL.pdf
- Description:
- TVS DIODE 12.8VWM 27.2VC DO201
- Quantity:
- Payment:
- Shipping:
Inventory:9,907
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Product details
Overview
1.5KE15ARL from STMicroelectronics is a unidirectional Transil™ transient voltage suppression (TVS) diode in DO-201 package, designed for primary overvoltage protection of DC power rails and signal lines. It features 15 V standoff voltage (VRM), 14.3 V minimum breakdown voltage (VBR), 21.2 V clamping voltage at 71 A peak pulse current (10/1000 µs), and 1500 W peak pulse power rating - deployed in industrial power supplies and automotive body control modules.
For engineers reviewing the 1.5KE15ARL datasheet, 1.5KE15ARL pinout, 1.5KE15ARL application, or 1.5KE15ARL equivalent, key selection criteria include clamping ratio (VCL/VBR = 1.48), low leakage (<1 µA @ 12 V), junction temperature limit (175 °C), and UL 497B certification for surge protection in telecom and industrial interfaces.
Technical Context
This TVS diode operates as a voltage-clamped crowbar device: under normal bias it presents <1 µA reverse leakage up to 12 V; when exposed to transients exceeding 14.3 V, it avalanches rapidly (response time <1 ns) and clamps the line to ≤21.2 V at 71 A. Its DO-201 axial package enables high thermal mass and robust PCB mounting for repeated surge handling.
Thermal design relies on Rth(j-l) = 20 °C/W (junction-to-leads) and Rth(j-a) = 75 °C/W (junction-to-ambient on FR4), supporting continuous dissipation of 5 W at 75 °C ambient with adequate copper area. The αT voltage temperature coefficient is +8.4 mV/°C per volt of VBR, enabling predictable derating across operating temperatures.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 1500 W (10/1000 µs waveform): sustains single lightning-induced surges without failure |
| Standoff Voltage (VRM) | 12 V: maximum continuous reverse voltage before leakage exceeds 1 µA |
| Breakdown Voltage (VBR) | 14.3 V min @ 1 mA: guaranteed avalanche initiation threshold for reliable triggering |
| Clamping Voltage (VCL) | 21.2 V @ 71 A (10/1000 µs): limits protected circuit voltage during worst-case surge |
| Junction Temperature Max | 175 °C: enables operation in under-hood automotive and industrial environments |
| Leakage Current | <1 µA @ 12 V: avoids loading low-power sensor or logic supply rails |
| Capacitance | 5000 pF @ 0 V, 1 MHz: acceptable for DC/low-speed analog lines, not RF |
Pinout & Package
1.5KE15ARL uses the DO-201 axial leaded package (8.5–9.5 mm length × 4.8–5.3 mm diameter), with cathode band marking indicating the cathode terminal. Leads are tin-plated copper, RoHS-compliant and UL94 V0 rated.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient return path | Connected to ground or low-impedance reference; carries full surge current back to source |
| Cathode | Protected line connection | Connected to the line being protected (e.g., 12 V rail); clamps voltage relative to anode |
Key Features
| Feature | Design Value |
|---|---|
| Low clamping factor (VCL/VBR) | 1.48 - minimizes overvoltage stress on downstream MOSFETs and ICs |
| Fast response time | <1 ns - reacts before most microsecond-scale transients damage sensitive nodes |
| UL 497B certified | QVGQ2.E136224 - validated for telecom and industrial surge immunity compliance |
| High surge current capability | 71 A (10/1000 µs) - withstands IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) |
| Lead-free & RoHS compliant | ECOPACK® grade - meets environmental requirements for global manufacturing |
Applications
| Automotive Body Control Module | Industrial PLC Input Protection |
|---|---|
Use Scenario: 12 V battery-supplied microcontroller inputs exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role: Primary clamping element on LIN bus and sensor supply lines. Use Value: Limits transient voltage to 21.2 V, preventing latch-up or gate oxide rupture in 5 V/3.3 V logic interfaces. |
Use Scenario: 24 V DC digital input channels receiving field wiring surges in factory automation cabinets. IC Role / Device Role: Front-end TVS on optocoupler input side before current-limiting resistor. Use Value: Absorbs 1500 W surges while maintaining <1 µA leakage, preserving input threshold accuracy. |
| Telecom Power Feeds | Medical Equipment DC Rails |
Use Scenario: -48 V DC power entry point in base station remote radio units subject to lightning-induced common-mode surges. IC Role / Device Role: Unidirectional clamp between power rail and chassis ground. Use Value: Clamps to 21.2 V with 14.3 V breakdown, enabling coordination with secondary MOVs and ensuring UL 497B compliance. |
Use Scenario: 5 V/12 V internal power distribution in diagnostic imaging subsystems requiring low EMI and zero false triggers. IC Role / Device Role: Point-of-load TVS on FPGA I/O banks and ADC reference supplies. Use Value: 5000 pF capacitance avoids signal integrity issues on DC-coupled rails; 175 °C rating supports sealed enclosure thermal profiles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ15A | DO-214AA package; 1500 W rating; VBR = 16.7 V min; VCL = 24.4 V @ 61.5 A | Surface-mount footprint; lower thermal resistance (Rth(j-a) = 40 °C/W); better for high-density PCBs | Select when board space is constrained and reflow soldering is preferred over axial through-hole assembly |
| P6KE15A | DO-15 package; same 15 V rating; VBR = 14.3 V min; VCL = 21.2 V @ 71 A; 1500 W rating | Larger body (9.5–10.5 mm length); higher thermal mass; legacy industrial stock | Choose for legacy BOM continuity where DO-15 sockets or tooling exist; identical electrical performance |
Compared with SMBJ15A and P6KE15A, 1.5KE15ARL offers optimal balance of axial mechanical robustness, UL 497B certification, and proven field reliability in high-surge industrial environments - while maintaining identical clamping behavior and surge rating.
Availability
1.5KE15ARL is available at Aetrix Electronics and suitable for automotive body electronics, industrial programmable logic controllers, telecom power feeds, and medical equipment DC rails requiring stable component supply and long-term lifecycle support.
Supply support for 1.5KE15ARL 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 sensing solutions for industrial, automotive, and consumer markets.
1.5KE15ARL belongs to the Transil™ TVS diode product line, engineered specifically for high-energy transient suppression in harsh electromagnetic environments - targeting IEC 61000-4-5, ISO 7637-2, and UL 497B compliance-critical applications.
FAQ
What is the maximum continuous reverse voltage for 1.5KE15ARL?
The maximum continuous reverse voltage (standoff voltage VRM) is 12 V. At this voltage, reverse leakage remains below 1 µA at 25 °C ambient. Exceeding 12 V risks premature conduction and accelerated degradation; operation above 14.3 V (minimum VBR) initiates controlled clamping.
Can 1.5KE15ARL be used in bidirectional configurations?
No - 1.5KE15ARL is unidirectional only, with cathode-marked polarity. For bidirectional protection, ST offers the 1.5KE15CA variant, which provides symmetrical clamping for AC lines or differential signals. Using two 1.5KE15ARL devices in series opposing is not recommended due to mismatched VBR and thermal imbalance.
What is the thermal resistance from junction to leads (Rth(j-l))?
Rth(j-l) is 20 °C/W, measured under standard test conditions (Tamb = 25 °C, no heatsink). This value enables accurate junction temperature estimation during surge events using ΔT = Ppulse × Rth(j-l), critical for verifying safe operation within the 175 °C absolute maximum limit.
Does 1.5KE15ARL meet UL 497B requirements?
Yes - it carries UL 497B file number QVGQ2.E136224, certifying suitability for primary protection in telecommunications and industrial data line applications. This covers surge testing per UL 497B Annex A (10/1000 µs, 1500 W) and validates its use in safety-critical surge suppression circuits.
1.5KE15ARL 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):
- 12.8V
- Voltage - Breakdown (Min):
- 14.3V
- Voltage - Clamping (Max) @ Ipp:
- 27.2V
- Current - Peak Pulse (10/1000µs):
- 368A (8/20µs)
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 5000pF @ 1MHz
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-201
1.5KE15ARL FAQ
1.How can I place an order for 1.5KE15ARL through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE15ARL 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 1.5KE15ARL reliable?
The price and inventory of 1.5KE15ARL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE15ARL is usually 5 days.
3.What payment methods are accepted for 1.5KE15ARL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE15ARL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE15ARL?
1.5KE15ARL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE15ARL 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 1.5KE15ARL?
For technical support, including 1.5KE15ARL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE15ARL requirements.
6.How does Aetrix verify that 1.5KE15ARL is sourced from the original manufacturer or authorized distributors?
All 1.5KE15ARL 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 1.5KE15ARL meets industry standards.
7.What is the process for return or replacement of 1.5KE15ARL?
All 1.5KE15ARL units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE15ARL, 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 1.5KE15ARL part is unused and in its original packaging.
Return procedure for 1.5KE15ARL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE15ARL Tags
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