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STMicroelectronics 1.5KE12ARL
- Part No.:
- 1.5KE12ARL
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE12ARL.pdf
- Description:
- TVS DIODE 10.2VWM 21.7VC DO201
- Quantity:
- Payment:
- Shipping:
Inventory:6,641
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Product details
Overview
1.5KE12ARL from STMicroelectronics is a unidirectional Transil™ TVS diode designed for high-energy transient voltage suppression in DC power rails and signal lines. It features a 12 V standoff voltage (VRM), 11.4–12.6 V breakdown voltage (VBR) at 1 mA, 16.7 V clamping voltage (VCL) at 90 A peak pulse current (IPP), and 1500 W peak pulse power (10/1000 µs). It protects MOSFETs and low-voltage ICs in industrial power supplies.
For engineers reviewing the 1.5KE12ARL datasheet, 1.5KE12ARL pinout, 1.5KE12ARL application, or 1.5KE12ARL equivalent, key selection criteria include clamping ratio (VCL/VBR ≈ 1.47), low leakage (<5 µA @ 12 V), DO-201 package thermal resistance (Rth(j-l) = 20 °C/W), and UL 497B certification for surge protection systems.
Technical Context
This unidirectional TVS diode operates via avalanche breakdown to clamp transients faster than 1 ns, with a typical dynamic impedance of 7.8 Ω. Its junction-to-lead thermal resistance (20 °C/W) enables reliable power dissipation on PCBs without heatsinks under repetitive surges up to 5 W continuous.
The device exhibits a voltage temperature coefficient (αT) of 0.00078 /°C and capacitance of 6000 pF at 0 V (1 MHz), making it suitable for low-frequency power-line protection rather than high-speed data lines.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 1500 W (10/1000 µs): Handles IEC 61000-4-5 Level 4 surges without failure |
| Standoff Voltage (VRM) | 12 V: Maximum continuous reverse voltage before leakage exceeds 5 µA |
| Breakdown Voltage (VBR) | 11.4–12.6 V @ 1 mA: Ensures precise triggering near system operating voltage |
| Clamping Voltage (VCL) | 16.7 V @ 90 A: Limits downstream voltage stress during 8/20 µs surge events |
| Junction Temp Limit | 175 °C: Supports operation in enclosed industrial enclosures with ambient up to 75 °C |
| Package Thermal Rth(j-l) | 20 °C/W: Enables 5 W steady-state dissipation with <100 °C junction rise over leads |
Pinout & Package
1.5KE12ARL uses the DO-201 axial-leaded package (8.5–9.5 mm length, 4.8–5.3 mm diameter), optimized for through-hole mounting and manual rework. The case is epoxy-based, UL94 V0 rated, and lead-free per ECOPACK® standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line; conducts avalanche current to ground during overvoltage |
| Anode | Reference return path | Typically tied to system ground or low-impedance return plane for clamping reference |
Key Features
| Feature | Design Value |
|---|---|
| Low clamping factor | VCL/VBR ≈ 1.47 ensures minimal overvoltage margin above operating rail |
| UL 497B certification | QVGQ2.E136224 listing validates use in telecom and industrial surge protection modules |
| Fast response time | <1 ns turn-on enables protection of sub-10 ns logic edges in microcontroller I/O |
| High surge robustness | Withstands 200 A non-repetitive forward surge (10 ms), supporting fault-current limiting designs |
Applications
| Industrial PLC Power Input | DC Motor Drive Control Board |
|---|---|
Use Scenario: 24 V DC input stage exposed to inductive kickback and lightning-induced surges on factory floor wiring. IC Role / Device Role / Timing Role: Primary overvoltage clamp on main supply rail upstream of DC-DC converters and MCU power regulators. Use Value: Clamps 1 kV/500 A surges to ≤16.7 V, preventing latch-up or gate oxide damage in downstream 3.3 V/5 V logic. | Use Scenario: Protection of H-bridge gate drivers and current-sense amplifiers against back-EMF transients during motor commutation. IC Role / Device Role / Timing Role: Parallel-connected TVS across motor supply rail to absorb energy from inductive flyback. Use Value: 1500 W rating handles repeated 100 A spikes without degradation, extending board service life in HVAC and conveyor systems. |
| Telecom Remote Power Feeds | Renewable Energy Charge Controller |
Use Scenario: 48 V PoE-like remote power feed in outdoor base station cabinets subject to induced surges from nearby lightning strikes. IC Role / Device Role / Timing Role: First-stage transient suppressor on DC input before isolation and regulation stages. Use Value: UL 497B compliance ensures interoperability with telecom surge protection standards and reduces system-level certification effort. | Use Scenario: 12 V battery charging circuit in solar charge controllers exposed to load dump and grid-switching transients. IC Role / Device Role / Timing Role: Bidirectional clamping not applicable; unidirectional 1.5KE12ARL used on positive rail with grounded cathode. Use Value: 12 V VRM matches nominal battery voltage, minimizing standby leakage while providing full 1500 W surge headroom. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ12A | DO-214AA package, lower 600 W rating, 13.3 V VBR min, 19.9 V VCL @ 42.7 A | Suitable for space-constrained PCBs but requires derating for >1 kA surge events | Select when board area is critical and peak surge energy is ≤600 W |
| P6KE12A | Legacy 600 W rating, DO-15 package, 11.4–12.6 V VBR, 19.2 V VCL @ 42 A | Limited to lower-energy transients; lacks UL 497B listing | Choose only for cost-sensitive legacy designs where 1500 W headroom is unnecessary |
Compared with SMBJ12A and P6KE12A, 1.5KE12ARL delivers 2.5× higher surge power handling and certified safety compliance-critical for industrial equipment requiring IEC 61000-4-5 Level 4 immunity without external crowbar circuits.
Availability
1.5KE12ARL is available at Aetrix Electronics and suitable for industrial PLC power inputs, DC motor drive control boards, telecom remote power feeds, and renewable energy charge controllers requiring stable component supply across multi-year production cycles.
Supply support for 1.5KE12ARL 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, specializing in power management, analog, MEMS, and automotive-grade ICs with manufacturing in Europe and Asia.
The 1.5KE series belongs to ST's Transil™ TVS portfolio, engineered specifically for high-reliability industrial and telecom surge protection where robustness, certification, and repeatable clamping performance are mandatory.
FAQ
What is the maximum continuous reverse voltage (VRM) for 1.5KE12ARL?
The maximum continuous reverse voltage (VRM) is 12 V, defined as the highest DC or RMS voltage the device can withstand without exceeding 5 µA leakage current. This value is confirmed in Table 3 of ST's Doc ID 2913 Rev 4, and aligns with its use in 12 V nominal systems such as automotive auxiliary rails and solar charge controllers.
Does 1.5KE12ARL meet UL safety standards?
Yes, 1.5KE12ARL carries UL 497B file number QVGQ2.E136224, certifying its suitability for primary and secondary circuit surge protection in telecommunications and industrial equipment. This listing covers flammability (UL94 V0 epoxy), construction, and surge endurance testing per UL requirements.
How does the DO-201 package affect thermal performance?
The DO-201 package provides a junction-to-lead thermal resistance (Rth(j-l)) of 20 °C/W, enabling 5 W continuous power dissipation with ≤100 °C junction-to-lead temperature rise. Its axial leads facilitate manual soldering and mechanical strain relief in high-vibration environments like motor drives and outdoor telecom cabinets.
Can 1.5KE12ARL be used in bidirectional configurations?
No-1.5KE12ARL is unidirectional (denoted by "A" suffix); bidirectional variants carry "CA" (e.g., 1.5KE12CA). Using a unidirectional device in reverse-biased AC applications risks catastrophic failure during negative half-cycles, as it lacks symmetrical avalanche capability.
1.5KE12ARL 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):
- 10.2V
- Voltage - Breakdown (Min):
- 11.4V
- Voltage - Clamping (Max) @ Ipp:
- 21.7V
- Current - Peak Pulse (10/1000µs):
- 461A (8/20µs)
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 6000pF @ 1MHz
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-201
1.5KE12ARL FAQ
1.How can I place an order for 1.5KE12ARL through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE12ARL 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 1.5KE12ARL reliable?
The price and inventory of 1.5KE12ARL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE12ARL is usually 5 days.
3.What payment methods are accepted for 1.5KE12ARL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE12ARL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE12ARL?
1.5KE12ARL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE12ARL 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 1.5KE12ARL?
For technical support, including 1.5KE12ARL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE12ARL requirements.
6.How does Aetrix verify that 1.5KE12ARL is sourced from the original manufacturer or authorized distributors?
All 1.5KE12ARL 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 1.5KE12ARL meets industry standards.
7.What is the process for return or replacement of 1.5KE12ARL?
All 1.5KE12ARL units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE12ARL, 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 1.5KE12ARL part is unused and in its original packaging.
Return procedure for 1.5KE12ARL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE12ARL Tags
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