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Vishay General Semiconductor - Diodes Division 1.5KE350A-E3/54
- Part No.:
- 1.5KE350A-E3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE350A-E3/54.pdf
- Description:
- TVS DIODE 300VWM 482VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:550
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Product details
Overview
1.5KE350A-E3/54 from Vishay General Semiconductor is a unidirectional Transient Voltage Suppressor (TVS) diode designed for high-energy surge protection in DC power lines and signal paths. It features a 333 V to 368 V breakdown voltage (VBR), 300 V maximum standoff voltage (VWM), 482 V clamping voltage at peak pulse current, 1500 W peak pulse power (10/1000 µs), and operates across –55 °C to +175 °C junction temperature. It protects MOSFETs and ICs in industrial power supplies against lightning-induced transients.
For engineers reviewing the 1.5KE350A-E3/54 datasheet, 1.5KE350A-E3/54 pinout, 1.5KE350A-E3/54 application, or 1.5KE350A-E3/54 equivalent, this part delivers verified clamping performance, JEDEC-standardized 1.5KE package compatibility, AEC-Q101 qualification eligibility (via HE3 variants), and RoHS-compliant matte tin plating - critical for automotive and industrial surge design validation.
Technical Context
This TVS diode uses a glass-passivated silicon junction optimized for fast transient response (<1 ns) and low incremental surge resistance. Its unidirectional polarity enables cathode-referenced clamping on positive-going surges, with a 3.1 A peak pulse current (IPPM) at 482 V clamping voltage under 10/1000 µs waveform conditions.
The device complies with UL 497B recognition (QVGQ2) and meets JESD 22-B106 solderability standards (275 °C, 10 s). Thermal resistance is 15.4 °C/W junction-to-lead, enabling reliable operation without heatsinking up to 6.5 W continuous power dissipation at TL = 75 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 333 V / 368 V - ensures reliable triggering above normal 300 V DC bus operating voltage while avoiding false trips |
| VWM | 300 V - maximum continuous reverse working voltage compatible with 300 V nominal systems |
| VC @ IPPM | 482 V - clamping voltage limits downstream component stress during 3.1 A transient events |
| PPPM | 1500 W - handles high-energy 10/1000 µs surges common in industrial motor drives and telecom line interfaces |
| IPPM | 3.1 A - peak pulse current capability derived directly from clamping and power rating constraints |
| TJ max. | +175 °C - supports operation in under-hood automotive and high-temperature industrial enclosures |
| RθJL | 15.4 °C/W - low thermal resistance enables efficient heat transfer to PCB copper or lead frame without external heatsink |
Pinout & Package
Package: Case Style 1.5KE - molded epoxy body with matte tin-plated leads, UL 94 V-0 rated, 0.375" (9.5 mm) lead length, 0.042" (1.07 mm) lead diameter.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction | Connected to system ground or low-side reference; enables cathode-referenced clamping |
| Cathode | Clamping output node (marked with color band) | Connected to protected line; conducts surge current to ground when VAK exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity |
| 1500 W peak pulse power (10/1000 µs) | Provides robust protection against IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) in industrial environments |
| Response time < 1 ns | Clamps before sensitive MOSFET gate oxide or IC input structures experience overvoltage damage |
| UL 497B recognized (QVGQ2) | Validates suitability for telecom and data line protection per safety-critical infrastructure requirements |
| RoHS-compliant E3 suffix | Meets JESD 201 Class 1A whisker resistance, ensuring solder joint integrity in automated assembly |
Applications
| Industrial Motor Drives | Telecom Power Feeds |
|---|---|
Use Scenario: Protection of DC bus inputs in variable-frequency drives exposed to regenerative braking spikes and contactor switching transients. IC Role / Device Role / Timing Role: Unidirectional TVS clamping element placed between +300 V rail and chassis ground. Use Value: Limits transient overvoltage to ≤482 V, preventing gate oxide rupture in 600 V IGBT modules and sustaining system uptime. | Use Scenario: Surge suppression on -48 V telecom power distribution boards subject to lightning-induced longitudinal surges. IC Role / Device Role / Timing Role: Cathode-connected TVS referenced to system ground, absorbing common-mode energy on feed lines. Use Value: Withstands 1500 W pulses without degradation, meeting Telcordia GR-1089-CORE Level 3 requirements. |
| Automotive Body Control Modules | Renewable Energy Inverters |
Use Scenario: Input protection for 12 V/24 V auxiliary power converters in BCMs subjected to load dump per ISO 7637-2 Pulse 5a. IC Role / Device Role / Timing Role: Primary clamping device on battery input rail, coordinated with upstream fuses. Use Value: Clamps 300 V transients to 482 V within nanoseconds, preserving MCU and CAN transceiver functionality. | Use Scenario: DC-link protection in solar string inverters where PV array surges couple into MPPT converter inputs. IC Role / Device Role / Timing Role: Standoff-rated TVS on 300–400 V DC bus, operating continuously at elevated ambient temperatures. Use Value: Maintains 300 V VWM stability up to +175 °C junction temperature, eliminating derating concerns in sealed enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ350A | Lower peak pulse power (600 W), smaller SMB package (vs. axial 1.5KE), 351–388 V VBR range | Targeted at space-constrained PCBs; insufficient for 1500 W IEC 61000-4-5 compliance | Select only when board area is critical and surge energy is limited to ≤600 W |
| 1.5KE350CA | Bidirectional variant with same VBR/VWM, but symmetric clamping for AC-coupled or floating lines | Required for protection of differential signal pairs or transformer-isolated interfaces | Choose when protecting bidirectional signals (e.g., RS-485, CAN FD) where polarity reversal occurs |
Compared with SMBJ350A and 1.5KE350CA, the 1.5KE350A-E3/54 uniquely balances 1500 W surge handling, axial through-hole mechanical robustness, and 300 V DC system compatibility - making it optimal for high-reliability industrial power rail protection where layout space permits axial components.
Availability
1.5KE350A-E3/54 is available at Aetrix Electronics and suitable for industrial motor drives, telecom power feeds, automotive body control modules, and renewable energy inverters requiring stable component supply and long-lifecycle support.
Supply support for 1.5KE350A-E3/54 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
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, rectifiers, and protection devices with emphasis on reliability, power handling, and automotive-grade qualification.
The 1.5KE series was engineered for high-energy transient suppression in harsh environments - targeting industrial automation, transportation, and infrastructure applications where failure is not an option.
FAQ
What is the breakdown voltage range of the 1.5KE350A-E3/54?
The 1.5KE350A-E3/54 has a guaranteed breakdown voltage (VBR) range of 333 V to 368 V at 1.0 mA test current, measured per JEDEC standard. This tight tolerance ensures predictable clamping onset in 300 V DC systems and avoids nuisance tripping during normal operation. The value is confirmed in Vishay's Document Number 88301, Revision 09-Aug-2022, Table on page 2.
Is the 1.5KE350A-E3/54 RoHS compliant and lead-free?
Yes, the 1.5KE350A-E3/54 carries the E3 suffix, indicating full RoHS compliance and commercial-grade qualification. Its matte tin-plated leads meet J-STD-002 and JESD 22-B102 solderability standards, and it passes JESD 201 Class 1A whisker testing. This makes the 1.5KE350A-E3/54 suitable for lead-free reflow and wave soldering processes in high-volume manufacturing.
Does the 1.5KE350A-E3/54 have AEC-Q101 qualification?
The base 1.5KE350A-E3/54 is not AEC-Q101 qualified; however, the HE3 variant (e.g., 1.5KE350AHE3_B) is explicitly listed as AEC-Q101 qualified per Vishay Document 88301, Note (2) on page 3. For automotive applications requiring qualification, specify the HE3 version - the 1.5KE350A-E3/54 itself remains commercial-grade with identical electrical specs but no formal automotive stress testing certification.
What is the clamping voltage of the 1.5KE350A-E3/54 at its rated peak pulse current?
The 1.5KE350A-E3/54 clamps to a maximum of 482 V at its rated peak pulse current (IPPM) of 3.1 A under the standardized 10/1000 µs waveform. This value is specified in the Electrical Characteristics table (page 2 of Document 88301) and defines the upper voltage limit imposed on protected circuitry during worst-case surge events.
Can the 1.5KE350A-E3/54 be used in bidirectional protection circuits?
No - the 1.5KE350A-E3/54 is strictly unidirectional, as indicated by the "A" suffix (versus "CA" for bidirectional). Its cathode-band marking and asymmetric IV curve require correct polarity orientation. For bidirectional protection, use the 1.5KE350CA variant, which provides symmetrical clamping for AC or floating signal lines. Using the 1.5KE350A-E3/54 in reverse-biased configurations will not suppress negative-going transients.
1.5KE350A-E3/54 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 300V
- Voltage - Breakdown (Min):
- 333V
- Voltage - Clamping (Max) @ Ipp:
- 482V
- Current - Peak Pulse (10/1000µs):
- 3.1A
- 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:
- 1.5KE
1.5KE350A-E3/54 FAQ
1.How can I place an order for 1.5KE350A-E3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE350A-E3/54 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-E3/54 reliable?
The price and inventory of 1.5KE350A-E3/54 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-E3/54 is usually 5 days.
3.What payment methods are accepted for 1.5KE350A-E3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE350A-E3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE350A-E3/54?
1.5KE350A-E3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE350A-E3/54 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-E3/54?
For technical support, including 1.5KE350A-E3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE350A-E3/54 requirements.
6.How does Aetrix verify that 1.5KE350A-E3/54 is sourced from the original manufacturer or authorized distributors?
All 1.5KE350A-E3/54 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-E3/54 meets industry standards.
7.What is the process for return or replacement of 1.5KE350A-E3/54?
All 1.5KE350A-E3/54 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE350A-E3/54, 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-E3/54 part is unused and in its original packaging.
Return procedure for 1.5KE350A-E3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE350A-E3/54 Tags
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