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STMicroelectronics 1.5KE350CARL
- Part No.:
- 1.5KE350CARL
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE350CARL.pdf
- Description:
- TVS DIODE 299VWM 618VC DO201
- Quantity:
- Payment:
- Shipping:
Inventory:4,422
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Product details
Overview
1.5KE350CARL from STMicroelectronics is a bidirectional Transil™ TVS diode designed for high-energy transient voltage suppression in DC power lines and signal interfaces. It delivers 1500 W peak pulse power (10/1000 µs), has a breakdown voltage of 332 V (min) to 368 V (max) at 1 mA, clamps transients to ≤482 V at 4.0 A peak pulse current, and operates across –65 °C to +175 °C. It protects MOSFETs, microcontrollers, and industrial I/O circuits against ESD and lightning-induced surges.
For engineers reviewing the 1.5KE350CARL datasheet, 1.5KE350CARL pinout, 1.5KE350CARL application, or 1.5KE350CARL equivalent, key selection criteria include clamping voltage vs. standoff voltage margin, unidirectional/bidirectional configuration for AC-coupled lines, junction-to-lead thermal resistance (20 °C/W), and UL 497B certification for telecom surge protection compliance.
Technical Context
This device operates as a voltage-clamping avalanche diode with fast response time (<1 ns), enabling protection of sensitive electronics before transient energy reaches downstream components. Its bidirectional structure allows symmetrical clamping on both polarities-critical for AC signal lines, RS-485 buses, and Ethernet PHY interfaces.
The 1.5KE350CARL uses a DO-201 axial package with low dynamic impedance (≤5.0 Ω typical) and exhibits a voltage temperature coefficient of +11 mV/°C, ensuring predictable VBR drift over operating temperature. Capacitance is 430 pF at 0 V (measured at 1 MHz), halved to 215 pF for bidirectional interpretation per ST's note in Table 3 footnote 3.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 1500 W (10/1000 µs waveform): sustains single high-energy surges without failure in industrial power rail protection. |
| Breakdown Voltage (VBR) | 332–368 V @ 1 mA: defines minimum voltage at which clamping initiates; ensures reliable turn-on above nominal 350 V system rails. |
| Clamping Voltage (VCL) | ≤482 V @ 4.0 A (10/1000 µs): maximum voltage seen by protected circuit during rated surge-critical for IC absolute max rating margin. |
| Leakage Current (IR) | ≤1 µA @ 299 V: negligible standby power loss and no false triggering in high-impedance sensing nodes. |
| Junction Temp Range | –65 °C to +175 °C: supports operation in harsh environments including motor drives and outdoor telecom enclosures. |
| Thermal Resistance (Rth(j-l)) | 20 °C/W (junction-to-leads): enables effective heat dissipation through PCB copper traces without heatsink in pulsed applications. |
| Capacitance (CJ) | 430 pF @ 0 V, 1 MHz: impacts high-speed signal integrity-suitable for <10 Mbps interfaces like CAN or RS-485, not USB or HDMI. |
Pinout & Package
1.5KE350CARL is housed in a DO-201 axial leaded package (EIAJ standard), epoxy-molded, lead-free, and UL 94 V-0 rated. Dimensions: length 25.4 mm (max), body diameter 5.3 mm (max), lead diameter 1.06 mm (max). Leads are tinned and suitable for wave or hand soldering (230 °C for 10 s).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Lead 1) | Transient current entry (negative polarity) | Connects to line under protection; forms one side of symmetrical bidirectional clamping path. |
| Cathode (Lead 2) | Transient current entry (positive polarity) | Connects to same line; completes bidirectional conduction path-no polarity assignment required in layout. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating differential lines (e.g., RS-485, PoE data pairs) without polarity concerns. |
| UL 497B certified | Validated for telecom surge immunity (e.g., GR-1089-CORE Level 4), reducing qualification effort in carrier-grade equipment. |
| Low clamping factor (VCL/VBR ≈ 1.45) | Minimizes overvoltage stress on protected ICs-critical when safeguarding 3.3 V or 5 V logic powered from higher-voltage rails. |
| Fast response time (<1 ns) | Activates before most transients propagate beyond PCB traces, preventing latch-up or gate oxide damage in MOSFETs and CMOS ICs. |
| ECOPACK® compliant | Meets RoHS and REACH requirements with lead-free terminations and halogen-free epoxy-supports global environmental compliance programs. |
Applications
| Industrial Motor Drives | Telecom Line Cards |
|---|---|
Use Scenario: Protection of gate drivers and current-sense amplifiers against IGBT switching spikes and inductive kickback in 400 V DC bus systems. IC Role / Device Role / Timing Role: Voltage clamp placed across DC bus or between gate and source, limiting transient overshoot to safe levels for SiC MOSFET drivers. Use Value: Prevents repeated gate oxide degradation and extends lifetime of high-side drivers operating near 350 V nominal rail. | Use Scenario: Surge protection on T1/E1 interface lines exposed to lightning-induced common-mode transients in central office equipment. IC Role / Device Role / Timing Role: Bidirectional shunt element on transformer-coupled line pair, clamping both positive and negative surges to protect line transceivers. Use Value: Meets GR-1089-CORE Level 4 (10/700 µs, 4 kV) without additional series impedance-reducing BOM count and board space. |
| Renewable Energy Inverters | Automotive Battery Monitoring |
Use Scenario: DC-link overvoltage suppression in solar string inverters where PV array open-circuit voltage reaches 380 V under cold conditions. IC Role / Device Role / Timing Role: Primary clamping device across DC-link capacitor bank, triggered only during fault events such as grid disconnection or arc faults. Use Value: Limits voltage excursion to ≤482 V, staying below 500 V isolation barrier ratings of film capacitors and gate drivers. | Use Scenario: Protection of 12 V battery monitoring ICs (e.g., LTC294x, MAX17205) against load dump transients up to 35 V in automotive subsystems. IC Role / Device Role / Timing Role: Secondary clamping stage after primary 36 V TVS, absorbing residual energy from ISO 7637-2 Pulse 5a with extended duration. Use Value: Provides robust second-tier defense where lower-voltage TVS alone cannot handle full 100 ms, 35 V load dump energy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ350CA | Lower peak power (600 W), smaller SMB package (vs. DO-201), higher clamping ratio (VCL/VBR ≈ 1.52) | Not suitable for 1500 W surges; limited to PCB space-constrained designs with lower surge exposure. | Select when footprint reduction outweighs surge energy handling-requires derating for repeated transients. |
| 1.5SMC350CA | Same 1500 W rating but SMC package (surface-mount), 20% higher leakage (≤2 µA), slightly higher VCL (495 V) | Requires rework for through-hole legacy boards; better for automated assembly but less robust mechanical mounting. | Choose for new SMT designs needing identical electrical performance with modern assembly compatibility. |
Compared with 1.5KE350CARL, SMBJ350CA trades surge robustness for compactness, while 1.5SMC350CA matches power rating but shifts to surface-mount-making the DO-201 version optimal for high-reliability through-hole industrial power systems requiring mechanical stability and proven thermal path.
Availability
1.5KE350CARL is available at Aetrix Electronics and suitable for industrial motor drives, telecom line cards, renewable energy inverters, and automotive battery monitoring systems requiring stable component supply across long product lifecycles.
Supply support for 1.5KE350CARL 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 Transil™ series targets high-energy transient suppression in power electronics and communications infrastructure-designed specifically for reliability in harsh environments with repeatable clamping performance and UL-certified safety compliance.
FAQ
What is the meaning of 'CA' in 1.5KE350CARL?
The 'CA' suffix denotes bidirectional configuration-meaning the device clamps transients of either polarity symmetrically. This differs from 'A' (unidirectional), which clamps only positive surges relative to cathode. The 'RL' indicates tape-and-reel packaging (1900 units per reel), and the DO-201 package is standardized per EIAJ.
Can 1.5KE350CARL be used in AC mains input protection?
No-it is not rated for continuous AC voltage withstand or safety isolation. Its 350 V breakdown is intended for DC or low-frequency transient suppression, not RMS AC line voltages. For AC mains, use IEC 61000-4-5-compliant MOVs or specialized AC-rated TVS arrays with reinforced insulation and creepage clearance.
How does junction temperature affect breakdown voltage?
VBR increases linearly with temperature at +11 mV/°C (αT). At 125 °C junction temperature, VBR rises by (125 − 25) × 0.011 = 1.1 V above its 25 °C value-so min/max range shifts to ~333–369 V. This must be accounted for in high-temperature designs to avoid premature clamping.
Is 1.5KE350CARL suitable for protecting USB or HDMI interfaces?
No-its 430 pF capacitance causes excessive signal attenuation and jitter at high speeds. USB 2.0 (480 Mbps) and HDMI (≥1.5 Gbps) require sub-1 pF TVS devices. This part is appropriate for lower-speed interfaces like RS-232, RS-485, CAN, or DC power rails-not high-speed digital data lines.
1.5KE350CARL 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):
- 299V
- Voltage - Breakdown (Min):
- 332V
- Voltage - Clamping (Max) @ Ipp:
- 618V
- Current - Peak Pulse (10/1000µs):
- 16A (8/20µs)
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 215pF @ 1MHz
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-201
1.5KE350CARL FAQ
1.How can I place an order for 1.5KE350CARL through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE350CARL 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 1.5KE350CARL reliable?
The price and inventory of 1.5KE350CARL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE350CARL is usually 5 days.
3.What payment methods are accepted for 1.5KE350CARL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE350CARL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE350CARL?
1.5KE350CARL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE350CARL 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 1.5KE350CARL?
For technical support, including 1.5KE350CARL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE350CARL requirements.
6.How does Aetrix verify that 1.5KE350CARL is sourced from the original manufacturer or authorized distributors?
All 1.5KE350CARL 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 1.5KE350CARL meets industry standards.
7.What is the process for return or replacement of 1.5KE350CARL?
All 1.5KE350CARL units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE350CARL, 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 1.5KE350CARL part is unused and in its original packaging.
Return procedure for 1.5KE350CARL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE350CARL 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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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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