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Diodes Incorporated 1.5KE350A-T
- Part No.:
- 1.5KE350A-T
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE350A-T.pdf
- Description:
- TVS DIODE 300VWM 482VC DO201
- Quantity:
- Payment:
- Shipping:
Inventory:8,540
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Product details
Overview
1.5KE350A-T from Diodes Incorporated is a unidirectional 1500W transient voltage suppressor (TVS) diode designed for primary overvoltage protection in DC power lines and signal interfaces. It features a 300V reverse standoff voltage, 332–368V breakdown range at 1mA, 482V maximum clamping voltage at 4A peak pulse current, and operates across –55°C to +175°C. It is used in industrial power supplies to safeguard rectifier outputs against lightning-induced surges.
For engineers reviewing the 1.5KE350A-T datasheet, 1.5KE350A-T pinout, 1.5KE350A-T application, or 1.5KE350A-T equivalent, key selection criteria include clamping voltage margin relative to protected IC VBR, peak pulse current capability under 1.0ms waveform, thermal derating above +25°C, and DO-201 axial lead compatibility with through-hole PCB layouts.
Technical Context
This unidirectional TVS diode uses a glass-passivated silicon junction to achieve fast response time (<1ps) and stable clamping performance under repetitive surge stress. Its 1500W peak pulse power rating is specified at tP = 1.0ms with non-repetitive 8.3ms half-sine waveform compliance.
The device exhibits low leakage (<5μA @ 300V), tight VBR tolerance (±5%), and a voltage temperature coefficient of +0.110%/°C - enabling predictable clamping behavior across automotive and industrial ambient ranges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 1500W at 1.0ms - sustains single high-energy transients without failure |
| Reverse Standoff Voltage (VRWM) | 300V - maximum continuous DC voltage before significant leakage |
| Breakdown Voltage (VBR) | 332–368V @ 1mA - defines onset of avalanche conduction |
| Max Clamping Voltage (VC) | 482V @ IPP = 4A - upper limit of protected circuit voltage during surge |
| Peak Pulse Current (IPP) | 4.0A @ 1.0ms - surge current capacity before VC exceeds spec |
| Operating Temperature | –55°C to +175°C - supports under-hood and industrial enclosure deployment |
| Leakage Current | ≤5μA @ 300V - ensures minimal standby power loss in high-impedance circuits |
Pinout & Package
Package: DO-201 axial-leaded, transfer-molded epoxy housing (UL 94V-0 rated), 1.12g mass, tin-finished leads solderable per MIL-STD-202 Method 208.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias | Connected to ground or low-side return path in unidirectional clamp configuration |
| Cathode | Avalanche conduction terminal | Connected to protected line; cathode band marking identifies polarity on body |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated die construction | Enables stable long-term reliability and reduced parameter drift under thermal cycling |
| 1500W peak pulse rating | Meets IEC 61000-4-5 Level 4 (4kV) surge immunity requirements for AC/DC inputs |
| Fast response time | Sub-nanosecond turn-on limits voltage overshoot during ESD and lightning transients |
| RoHS-compliant & halogen-free | Complies with EU Directive 2015/863/EU and automotive green material standards |
| DO-201 mechanical robustness | Withstands >9.5mm lead length thermal stress and 200A surge current without bond wire failure |
Applications
| Industrial Power Supply Input Protection | Automotive Body Control Module (BCM) Power Rail |
|---|---|
Use Scenario: 300V DC bus in DIN-rail mounted PLC power supply exposed to load dump and inductive switching transients. IC Role / Device Role / Timing Role: Primary shunt clamping element placed upstream of DC-DC converter input stage. Use Value: Limits transient excursions to ≤482V, preserving MOSFET gate oxide integrity and preventing controller latch-up. |
Use Scenario: 24V battery-fed BCM microcontroller power rail subject to ISO 7637-2 Pulse 5a (load dump up to 60V). IC Role / Device Role / Timing Role: Unidirectional TVS connected between VBAT and GND to clamp positive-going surges only. Use Value: Maintains system reset threshold margin by holding rail voltage below 482V during 100ms load dump events. |
| Telecom Remote Radio Unit (RRU) DC Feeder Line | Renewable Energy Inverter DC Link Protection |
Use Scenario: Outdoor RRU powered via 48V PoE+ over 100m twisted pair, susceptible to induced lightning surges. IC Role / Device Role / Timing Role: First-stage protection device on DC input before DC-DC isolation stage. Use Value: Absorbs 1500W energy within 1ms, reducing downstream MOV stress and extending overall surge life. |
Use Scenario: 600V DC link in solar string inverter exposed to grid-switching transients and nearby lightning strikes. IC Role / Device Role / Timing Role: Secondary clamping device paralleled with higher-voltage TVS to refine clamping window. Use Value: Tight VBR tolerance (±5%) enables precise coordination with upstream 400V TVS for staged energy diversion. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ350A | 600W rating, SMB surface-mount package, 482V clamping at 2.5A | Lower power handling; suited for space-constrained PCBs where 1500W is not required | Select when board area is constrained and surge duty cycle is low or repetitive |
| 1.5SMC350A | Same 1500W rating, SMC package, identical VRWM/VC, but 2.3g mass and higher thermal resistance | Surface-mount alternative requiring reflow-compatible layout and thermal relief pads | Choose for automated assembly where axial leads are incompatible with production flow |
Compared with SMBJ350A and 1.5SMC350A, the 1.5KE350A-T delivers identical clamping performance at full 1500W with proven axial-lead mechanical robustness for high-vibration environments, while offering lower thermal resistance than SMC and higher surge margin than SMB.
Availability
1.5KE350A-T is available at Aetrix Electronics and suitable for industrial power supplies, automotive body control modules, telecom remote radio units, and renewable energy inverters requiring stable component supply and long-lifecycle support.
Supply support for 1.5KE350A-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 manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.
The 1.5KE series belongs to Diodes' transient voltage suppressor portfolio, engineered specifically for high-energy surge protection in harsh-environment applications including industrial automation, automotive subsystems, and infrastructure power systems.
FAQ
Is the 1.5KE350A-T RoHS compliant and halogen-free?
Yes. The 1.5KE350A-T meets EU Directive 2015/863/EU (RoHS 3), contains <900ppm bromine, <900ppm chlorine, and <1000ppm antimony, and is certified "Green" per Diodes Incorporated's material definitions. Lead-free finish and UL 94V-0 epoxy housing are standard.
What is the difference between 1.5KE350A-T and 1.5KE350CA-T?
The "A" suffix denotes unidirectional operation with cathode band marking; "CA" indicates bidirectional symmetry with no polarity marking. 1.5KE350A-T clamps only positive transients to ground, while 1.5KE350CA-T protects both polarities - critical for AC-coupled or floating signal lines.
Can the 1.5KE350A-T be used in parallel for higher surge current handling?
No. Due to VBR tolerance (±5%) and thermal mismatch, paralleling multiple 1.5KE350A-T devices causes current imbalance and premature failure. For >4A peak current, select a higher-rated TVS (e.g., 3KP350A) or implement staged protection with MOVs and gas discharge tubes.
Does the 1.5KE350A-T meet AEC-Q200 qualification for automotive use?
No. While manufactured in IATF 16949-certified facilities, the 1.5KE350A-T is not AEC-Q200 qualified. For automotive-grade TVS, Diodes offers the AEC-Q200-qualified P6SMB350A or SMAJ350A series - contact Aetrix for qualified alternatives.
1.5KE350A-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:
- 1
- Bidirectional Channels:
- -
- 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
1.5KE350A-T FAQ
1.How can I place an order for 1.5KE350A-T through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE350A-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 1.5KE350A-T reliable?
The price and inventory of 1.5KE350A-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE350A-T is usually 5 days.
3.What payment methods are accepted for 1.5KE350A-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE350A-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE350A-T?
1.5KE350A-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE350A-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 1.5KE350A-T?
For technical support, including 1.5KE350A-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE350A-T requirements.
6.How does Aetrix verify that 1.5KE350A-T is sourced from the original manufacturer or authorized distributors?
All 1.5KE350A-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 1.5KE350A-T meets industry standards.
7.What is the process for return or replacement of 1.5KE350A-T?
All 1.5KE350A-T units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE350A-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 1.5KE350A-T part is unused and in its original packaging.
Return procedure for 1.5KE350A-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE350A-T Tags
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ESD9B5.0ST5G
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Diodes Incorporated
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Diodes Incorporated
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