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Diodes Incorporated 1.5KE350CA-T
- Part No.:
- 1.5KE350CA-T
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE350CA-T.pdf
- Description:
- TVS DIODE 300VWM 482VC DO201
- Quantity:
- Payment:
- Shipping:
Inventory:3,613
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Product details
Overview
1.5KE350CA-T from Diodes Incorporated is a bidirectional 1500W transient voltage suppressor (TVS) diode in DO-201 package, designed for high-energy surge protection in DC power lines and signal interfaces. It features a 300V reverse standoff voltage (VRWM), 332–368V breakdown range (VBR), 482V clamping voltage (VC) at 4A peak pulse current, and operates across –55°C to +175°C.
For engineers reviewing the 1.5KE350CA-T datasheet, 1.5KE350CA-T pinout, 1.5KE350CA-T application, or 1.5KE350CA-T equivalent, this device serves as a robust overvoltage clamp for automotive power rails, industrial I/O protection, and telecom interface circuits where fast response (<1 ns), low leakage (<5 µA @ 300V), and AEC-Q200-aligned reliability are required.
Technical Context
This bidirectional TVS diode uses glass-passivated silicon junctions to achieve sub-nanosecond response time and stable clamping under repetitive 1.0 ms 8/20 µs surge waveforms. Its symmetrical avalanche structure enables equal clamping in both polarities without external polarity management.
The device is rated for 1500W peak pulse power (tP = 1.0 ms), 5.0W steady-state dissipation at TL = 75°C, and supports 200A non-repetitive forward surge current. Temperature coefficient of VBR is +0.110%/°C, ensuring predictable voltage drift across its full operating range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 1500 W - Withstands 1.0 ms 8/20 µs surges up to 4A without degradation |
| Reverse Standoff Voltage (VRWM) | 300 V - Maximum continuous DC or RMS voltage before significant leakage |
| Breakdown Voltage (VBR) | 332–368 V @ 1 mA - Confirmed avalanche onset range for reliable triggering |
| Clamping Voltage (VC) | 482 V @ 4 A - Limits transient voltage seen by downstream circuitry during surge |
| Leakage Current (IR) | <5 µA @ 300 V - Minimizes standby power loss and avoids false triggering |
| Operating Temperature | –55°C to +175°C - Validated for under-hood automotive and industrial environments |
| Package | DO-201 - Axial-leaded, UL 94V-0 epoxy housing with tin-plated leads |
Pinout & Package
DO-201 axial package with two terminals: anode and cathode. Marking for bidirectional version (suffix 'C') omits cathode band; polarity is non-functional due to symmetrical construction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Surge current entry (positive polarity) | Accepts transient energy during positive excursions; forms one side of symmetrical avalanche path |
| Cathode | Surge current entry (negative polarity) | Accepts transient energy during negative excursions; completes bidirectional conduction path |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating lines without polarity awareness |
| Glass-passivated die | Improves long-term stability and moisture resistance vs. epoxy-only passivation |
| RoHS-compliant & halogen-free | Meets EU Directive 2015/863/EU with Br+Cl <1500 ppm and Sb <1000 ppm |
| Fast response time | <1.0 ns turn-on ensures clamping occurs before sensitive ICs experience overstress |
| Axial lead form factor | Supports through-hole mounting on high-current PCB traces and direct chassis bonding |
Applications
| Automotive Power Rail Protection | Industrial PLC Analog Input Protection |
|---|---|
Use Scenario: 12 V/24 V battery-fed ECUs exposed to load dump (ISO 7637-2 Pulse 5a) and jump-start transients. IC Role / Device Role / Timing Role: Primary overvoltage clamp placed upstream of DC-DC converters and microcontrollers. Use Value: Clamps 482 V at 4 A to protect 36 V-rated input stages while surviving repeated 1500 W surges. |
Use Scenario: 4–20 mA current loop inputs in factory automation systems subject to ESD and inductive switching noise. IC Role / Device Role / Timing Role: Bidirectional shunt protector across differential analog inputs and supply rails. Use Value: Symmetrical clamping prevents polarity-dependent failure and maintains signal integrity during ±1 kV contact ESD events. |
| Telecom Line Interface Protection | Renewable Energy Inverter DC Link Protection |
Use Scenario: RS-485/RS-422 transceivers connected to outdoor cabling vulnerable to lightning-induced surges. IC Role / Device Role / Timing Role: Secondary-level TVS placed after gas discharge tube (GDT) primary protection. Use Value: Low clamping voltage limits stress on transceiver I/O pins during fast-rising transients (tR < 100 ns). |
Use Scenario: DC bus between PV array and inverter where voltage spikes occur during rapid MPPT transitions or grid faults. IC Role / Device Role / Timing Role: Parallel surge limiter across bulk capacitor bank to absorb stored energy during overvoltage events. Use Value: 175°C max junction temperature rating allows operation near heat-generating IGBT modules 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 |
|---|---|---|---|
| SMBJ350CA | Same VRWM (300 V) and VC (482 V), but lower Ppk = 600 W in SMB package | Surface-mount only; unsuitable for high-current axial trace routing or chassis bonding | Select when board space is constrained and surge energy is ≤600 W |
| 1.5SMC350CA | Same electrical specs, but SMC package (DO-214AB); 1.5 kW rating confirmed per JEDEC test conditions | Higher thermal mass than DO-201; better sustained surge handling but larger footprint | Select when improved thermal cycling reliability is prioritized over axial lead compatibility |
Compared with 1.5KE350CA-T, SMBJ350CA trades axial mountability and 1500 W capability for compactness, while 1.5SMC350CA retains full power rating in a surface-mount format-making the DO-201 version optimal for legacy through-hole designs requiring proven mechanical robustness and field-serviceability.
Availability
1.5KE350CA-T is available at Aetrix Electronics and suitable for automotive power rail protection, industrial PLC analog input protection, and telecom line interface protection requiring stable component supply and long-lifecycle support.
Supply support for 1.5KE350CA-T 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
Diodes Incorporated is a global semiconductor company specializing in discrete, analog, and mixed-signal devices, with manufacturing certified to IATF 16949 and quality systems aligned with AEC-Q200 for passive components.
This part belongs to the 1.5KE series of high-power axial TVS diodes, engineered specifically for automotive and industrial surge immunity where DO-201 mechanical ruggedness, high-temperature operation, and repeatable clamping performance are mandatory.
FAQ
Is 1.5KE350CA-T still in active production?
No-1.5KE350CA-T is marked obsolete in Diodes' DS21503 Rev. 12 (May 2023). However, Aetrix Electronics maintains legacy inventory with full traceability and offers engineering support for design migration to functionally equivalent replacements such as 1.5SMC350CA or SMBJ350CA.
What is the meaning of the 'C' suffix in 1.5KE350CA-T?
The 'C' suffix denotes bidirectional construction: the device clamps symmetrically for both positive and negative transients, with no cathode marking and identical VBR/VC characteristics in either polarity-unlike unidirectional variants (e.g., 1.5KE350A-T) that require correct orientation.
Can 1.5KE350CA-T be used in place of a unidirectional TVS in a DC circuit?
Yes-bidirectional operation does not impair DC functionality. In a DC system, it behaves identically to a unidirectional device during normal operation (leakage <5 µA @ 300 V) and provides identical clamping during positive surges; negative surges are blocked by upstream blocking diodes or simply irrelevant in pure DC paths.
How does the DO-201 package affect thermal performance compared to SMC or SMB?
DO-201's axial leads provide superior thermal conduction to heatsinks or copper planes via lead soldering, enabling higher sustained power handling than surface-mount packages of similar rating. Its 1.12 g mass and epoxy formulation also improve mechanical shock resistance in vibration-prone environments like automotive under-hood installations.
1.5KE350CA-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 300V
- Voltage - Breakdown (Min):
- 332V
- Voltage - Clamping (Max) @ Ipp:
- 482V
- Current - Peak Pulse (10/1000µs):
- 4A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-201
1.5KE350CA-T FAQ
1.How can I place an order for 1.5KE350CA-T through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE350CA-T 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 1.5KE350CA-T reliable?
The price and inventory of 1.5KE350CA-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE350CA-T is usually 5 days.
3.What payment methods are accepted for 1.5KE350CA-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE350CA-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE350CA-T?
1.5KE350CA-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE350CA-T 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 1.5KE350CA-T?
For technical support, including 1.5KE350CA-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE350CA-T requirements.
6.How does Aetrix verify that 1.5KE350CA-T is sourced from the original manufacturer or authorized distributors?
All 1.5KE350CA-T 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 1.5KE350CA-T meets industry standards.
7.What is the process for return or replacement of 1.5KE350CA-T?
All 1.5KE350CA-T units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE350CA-T, 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 1.5KE350CA-T part is unused and in its original packaging.
Return procedure for 1.5KE350CA-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE350CA-T Tags
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ESD9B5.0ST5G
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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