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STMicroelectronics 1.5KE15CARL
- Part No.:
- 1.5KE15CARL
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE15CARL.pdf
- Description:
- TVS DIODE 12.8VWM 27.2VC DO201
- Quantity:
- Payment:
- Shipping:
Inventory:5,850
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Product details
Overview
1.5KE15CARL from STMicroelectronics is a bidirectional Transil™ TVS diode designed for transient overvoltage protection in DC power rails and signal lines. It features a 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 dissipation - deployed to safeguard MOSFETs, logic ICs, and microcontrollers in industrial power supplies.
For engineers reviewing the 1.5KE15CARL datasheet, 1.5KE15CARL pinout, 1.5KE15CARL application, or 1.5KE15CARL equivalent, key selection criteria include clamping ratio (VCL/VBR = 1.48), low leakage (<1 µA @ 12 V), DO-201 package thermal resistance (Rth(j-l) = 20 °C/W), and UL 497B certification for telecom surge protection.
Technical Context
This device operates as a voltage-clamping avalanche diode with bidirectional symmetry, enabling protection against both positive and negative transients without polarity constraints. Its fast response time (<1 ns) and low dynamic impedance (typ. 5.0 Ω) ensure effective suppression of ESD, lightning-induced surges, and inductive switching spikes.
The 1.5KE15CARL is characterized at 25 °C ambient and exhibits a voltage temperature coefficient (αT) of +8.4 × 10⁻⁴ /°C, allowing predictable VBR drift across operating junction temperatures up to 175 °C. Capacitance is 5000 pF at 0 V (measured at 1 MHz), halved to 2500 pF for bidirectional interpretation per ST's note.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 1500 W (10/1000 µs waveform): sustains single high-energy surges common in AC line or automotive load-dump events. |
| Standoff Voltage (VRM) | 15 V: maximum continuous reverse voltage before significant leakage; sets upper limit for normal operating rail voltage. |
| Breakdown Voltage (VBR) | 14.3–15.8 V @ 1 mA: onset of controlled avalanche conduction; defines threshold for clamping activation. |
| Clamping Voltage (VCL) | 21.2 V @ 71 A (10/1000 µs): maximum voltage seen by protected circuit during rated surge - critical for IC survival margin. |
| Leakage Current (IRM) | <1 µA @ 12 V: negligible standby power loss and minimal interference on low-power sensor or battery-backed circuits. |
| Package Thermal Resistance | Rth(j-l) = 20 °C/W: enables 5 W steady-state dissipation on infinite heatsink at 75 °C ambient - supports derated operation in enclosed enclosures. |
| Capacitance | 5000 pF @ 0 V, 1 MHz: impacts high-speed signal integrity; suitable for <1 MHz analog/power rails, not USB or Ethernet. |
Pinout & Package
1.5KE15CARL uses the DO-201 axial-leaded package (JEDEC DO-201AD), epoxy-molded, lead-free, UL94 V0 rated, with 8.5–9.5 mm body length and 25.4 mm lead spacing. Leads are electrically symmetric - no anode/cathode designation required for bidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Lead 1) | Transient current entry (negative surge) | Conducts during negative transients; forms symmetrical path with Cathode under reverse bias. |
| Cathode (Lead 2) | Transient current entry (positive surge) | Conducts during positive transients; identical electrical behavior to Lead 1 due to bidirectional structure. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating lines without polarity awareness - reduces BOM count vs. dual unidirectional setup. |
| Low clamping factor (VCL/VBR ≈ 1.48) | Minimizes overvoltage stress on downstream ICs - critical for 3.3 V or 5 V logic with tight absolute maximum ratings. |
| UL 497B certified (QVGQ2.E136224) | Validates suitability for primary-side telecom and data line surge protection per industry safety standards. |
| Fast response time (<1 ns) | Engages before transient energy couples into sensitive nodes - essential for protecting CMOS inputs and gate drivers. |
| High surge current rating (71 A, 10/1000 µs) | Withstands repeated 1 kV/500 A ring-wave surges per IEC 61000-4-5 when properly mounted on PCB with thermal relief. |
Applications
| Industrial PLC I/O Module | DC Power Supply Input Stage |
|---|---|
Use Scenario: 24 V DC input terminals exposed to field-wiring inductive kick and ground-loop transients. IC Role / Device Role: Primary overvoltage clamp upstream of DC-DC converter and isolation barrier. Use Value: Limits surge voltage to ≤21.2 V, preventing damage to 24 V-rated input supervisors and optocoupler drivers. |
Use Scenario: 12 V/24 V switched-mode power supply front-end subjected to load dump and back-EMF. IC Role / Device Role: Secondary-level transient suppressor after bulk MOV, absorbing residual energy missed by coarse protection. Use Value: Clamps residual spikes to safe levels for downstream LDOs and microcontroller VDD pins with 28 V absolute max rating. |
| Automotive Body Control Module | RS-485 Communication Port |
Use Scenario: LIN bus or sensor supply lines in vehicle cabin modules subject to ISO 7637-2 Pulse 1/2a/5a. IC Role / Device Role: Localized point-of-entry protection on 12 V rail feeding CAN/LIN transceivers and sensors. Use Value: Survives 100 V/50 ms load dump pulses while maintaining sub-µA leakage to avoid battery drain in sleep mode. |
Use Scenario: Termination points of long-haul RS-485 data lines in factory automation systems. IC Role / Device Role: Bidirectional line protector on A/B differential pair, placed before transceiver ESD diodes. Use Value: Absorbs common-mode surges up to 1.5 kW without distorting signal edges - preserves 10 Mbps timing integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ15CA | Same 15 V VRM, but 600 W rating (SMB package), lower VCL (24.4 V @ 24.5 A), Rth(j-a) = 75 °C/W. | Lower power handling; suited for space-constrained PCBs where surge energy is limited to <600 W. | Select when board area is critical and surge threat level is defined per IEC 61000-4-2 (ESD) rather than IEC 61000-4-5 (surge). |
| 1N6267A | Legacy 1500 W DO-201 device; higher VCL (24.0 V @ 62.5 A), wider VBR tolerance (13.7–16.3 V), no UL 497B listing. | Lacks telecom safety certification; higher clamping increases risk to 3.3 V logic interfaces. | Acceptable only for non-certified industrial equipment where UL compliance is not mandated and margin allows ≥24 V clamping. |
Compared with SMBJ15CA and 1N6267A, the 1.5KE15CARL delivers superior clamping performance (21.2 V vs. ≥24 V), verified UL 497B compliance for telecom/data line use, and tighter VBR control - making it optimal for safety-critical or high-reliability 15 V rail protection.
Availability
1.5KE15CARL is available at Aetrix Electronics and suitable for industrial PLC I/O modules, automotive body control units, and RS-485 communication ports requiring stable component supply and full production lifecycle support.
Supply support for 1.5KE15CARL 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 microcontrollers - serving automotive, industrial, and consumer markets.
The 1.5KE series belongs to ST's Transil™ TVS portfolio, engineered specifically for high-energy transient suppression in harsh environments - emphasizing reliability, UL certification, and robustness across extended temperature ranges.
FAQ
What is the maximum continuous reverse voltage the 1.5KE15CARL can withstand?
The 1.5KE15CARL has a maximum standoff voltage (VRM) of 15 V - meaning it blocks up to 15 V DC continuously with leakage <1 µA. Exceeding this voltage risks premature conduction and thermal runaway; design margin should keep operating rail ≤12 V for reliable long-term performance.
Can 1.5KE15CARL be used in AC line protection?
No - the 1.5KE15CARL is rated for DC or low-frequency AC transients only. Its 15 V VRM is incompatible with 120/230 VAC RMS systems. For AC mains, use higher-voltage variants like 1.5KE330CA (330 V VRM) or dedicated AC-rated MOVs with appropriate thermal fusing.
How does the bidirectional configuration affect PCB layout?
The bidirectional nature eliminates polarity concerns: either lead may connect to line or return. However, symmetric PCB trace routing and equal thermal pad area on both leads are essential to maintain balanced clamping and prevent localized overheating during high-current surges.
Is 1.5KE15CARL RoHS and REACH compliant?
Yes - per STMicroelectronics' ECOPACK® documentation, 1.5KE15CARL is lead-free, RoHS-compliant, and meets REACH SVHC requirements. The DO-201 package uses halogen-free epoxy conforming to UL94 V0, with full material declarations available in ST's ECOPACK® database.
1.5KE15CARL 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:
- -
- Bidirectional Channels:
- 1
- 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:
- 2500pF @ 1MHz
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-201
1.5KE15CARL FAQ
1.How can I place an order for 1.5KE15CARL through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE15CARL 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 1.5KE15CARL reliable?
The price and inventory of 1.5KE15CARL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE15CARL is usually 5 days.
3.What payment methods are accepted for 1.5KE15CARL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE15CARL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE15CARL?
1.5KE15CARL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE15CARL 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 1.5KE15CARL?
For technical support, including 1.5KE15CARL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE15CARL requirements.
6.How does Aetrix verify that 1.5KE15CARL is sourced from the original manufacturer or authorized distributors?
All 1.5KE15CARL 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 1.5KE15CARL meets industry standards.
7.What is the process for return or replacement of 1.5KE15CARL?
All 1.5KE15CARL units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE15CARL, 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 1.5KE15CARL part is unused and in its original packaging.
Return procedure for 1.5KE15CARL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE15CARL 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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onsemi
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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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