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Vishay General Semiconductor - Diodes Division 1.5KE350-E3/54
- Part No.:
- 1.5KE350-E3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE350-E3/54.pdf
- Description:
- TVS DIODE 284VWM 504VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:2,410
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Product details
Overview
1.5KE350-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 standoff voltage (VWM), 482 V clamping voltage at 3.1 A peak pulse current, 1500 W peak pulse power (10/1000 µs), and operates from –55 °C to +175 °C - deployed in industrial motor drives and telecom power supplies.
For engineers reviewing the 1.5KE350-E3/54 datasheet, 1.5KE350-E3/54 pinout, 1.5KE350-E3/54 application, or 1.5KE350-E3/54 equivalent, this page delivers verified electrical parameters, thermal derating behavior, clamping performance under standardized surge waveforms, and direct-fit alternatives for overvoltage protection design validation.
Technical Context
The 1.5KE350-E3/54 uses a glass-passivated silicon junction optimized for fast response (<1 ns) and low incremental surge resistance. Its unidirectional polarity enables cathode-referenced clamping on positive transients only, with a 3.5 V forward voltage limit at 100 A per JEDEC spec.
It is rated for 1500 W peak pulse power under 10/1000 µs waveform at 0.01% duty cycle, with thermal resistance of 75 °C/W (junction-to-ambient) and 15.4 °C/W (junction-to-lead), enabling reliable operation up to 175 °C junction temperature without heatsinking in short-pulse applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 333 V / 368 V - ensures reliable conduction onset above normal operating voltage while avoiding false triggering |
| VWM | 300 V - maximum continuous reverse working voltage before leakage exceeds 1 µA |
| VC @ IPPM | 482 V - clamped voltage during 3.1 A 10/1000 µs surge, defining worst-case stress on downstream components |
| PPPM | 1500 W - peak surge energy absorption capacity under standardized lightning-surge waveform |
| IFSM | 200 A - non-repetitive forward surge rating (8.3 ms half-sine), critical for inrush or fault-current handling |
| TJ max. | +175 °C - extended junction temperature rating supports operation in high-ambient industrial environments |
| RθJA | 75 °C/W - thermal resistance limiting self-heating during repetitive surges without forced cooling |
Pinout & Package
Package: DO-201AD (Case Style 1.5KE), axial-leaded, molded epoxy body with matte tin-plated leads compliant to J-STD-002 and JESD 22-B102. Cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction or clamping | Connected to lower-potential side (e.g., ground or return path) in unidirectional configuration |
| Cathode | Current exit point during clamping; marked with band | Connected to protected line (e.g., +300 V rail); defines clamping polarity and directionality |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enables stable VBR tolerance and long-term reliability under thermal cycling and humidity |
| 1500 W peak pulse power (10/1000 µs) | Supports IEC 61000-4-5 Level 4 surge immunity (4 kV line-earth) in single-device implementation |
| Clamping time <1 ns | Protects sensitive gate drivers and ADC inputs before destructive voltage overshoot occurs |
| RoHS-compliant E3 suffix | Meets JESD 201 Class 1A whisker resistance, suitable for lead-free reflow and automated assembly |
| UL 497B recognized (QVGQ2) | Validated for use in telecom and industrial safety-critical surge protection circuits per Underwriters Laboratories |
Applications
| Industrial Motor Drives | Telecom Power Supplies |
|---|---|
Use Scenario: Protection of DC bus lines against switching transients from IGBT turn-off and regenerative braking. IC Role / Device Role / Timing Role: Unidirectional TVS placed between +300 V rail and chassis ground to clamp positive surges exceeding 300 V. Use Value: Limits transient voltage to ≤482 V, preventing gate oxide rupture in 600 V IGBTs and sustaining system uptime per IEC 61800-3. | Use Scenario: Input-stage surge suppression on -48 V DC distribution boards in central office equipment. IC Role / Device Role / Timing Role: Cathode tied to -48 V rail, anode to ground - clamps positive-going surges induced by lightning coupling on feed lines. Use Value: Absorbs 1500 W pulses without degradation, maintaining compliance with Telcordia GR-1089-CORE Zone 3 requirements. |
| Renewable Energy Inverters | Automotive Battery Management Systems |
Use Scenario: DC-link protection in solar string inverters exposed to grid-switching transients and nearby lightning. IC Role / Device Role / Timing Role: Mounted across PV input terminals to clamp fast-rising common-mode surges before MPPT controller input stages. Use Value: Withstands repeated 10/1000 µs surges up to 3.1 A while maintaining VWM = 300 V, ensuring no leakage-induced drift in voltage sensing. | Use Scenario: Overvoltage protection on 12 V auxiliary power rails feeding CAN transceivers and microcontrollers. IC Role / Device Role / Timing Role: Cathode connected to 12 V rail, anode to ground - suppresses load-dump spikes up to ISO 7637-2 Pulse 5a (120 V/100 ms). Use Value: Clamps 120 V transients to <482 V within nanoseconds, preserving MCU reset logic and CAN bus integrity without latch-up. |
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 | Lower peak power (600 W), smaller SMB package (vs. DO-201AD), 350 V VWM, 574 V VC @ 1.05 A | Not suitable for 1500 W surge events; limited to PCB space-constrained designs with lower energy threats | Select when board area is constrained and surge threat level is ≤IEC 61000-4-5 Level 2 (2 kV) |
| 1.5KE350AHE3_B | Identical electrical specs, but AEC-Q101 qualified and HE3 whisker-tested (Class 2), same DO-201AD package | Required for automotive BMS and ADAS modules where qualification to AEC-Q101 is mandatory | Choose for automotive-grade production where qualification and long-term reliability under thermal cycling are required |
Compared with 1.5KE350-E3/54, SMBJ350A trades surge robustness for compactness, while 1.5KE350AHE3_B adds automotive qualification without altering clamping performance - enabling drop-in replacement in qualified systems but requiring sourcing verification for HE3 suffix availability.
Availability
1.5KE350-E3/54 is available at Aetrix Electronics and suitable for industrial motor drives, telecom power supplies, renewable energy inverters, and automotive battery management systems requiring stable component supply and full traceability.
Supply support for 1.5KE350-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, MOSFETs, and protection devices with emphasis on reliability, power handling, and industry-standard qualification.
The 1.5KE series was engineered for high-energy transient suppression in harsh environments, targeting industrial, telecom, and transportation applications where 1500 W surge capability and wide temperature operation are essential.
FAQ
What is the breakdown voltage range for the 1.5KE350-E3/54?
The 1.5KE350-E3/54 has a guaranteed breakdown voltage (VBR) range of 333 V to 368 V at 1.0 mA test current, per Vishay Document 88301. This tight tolerance ensures predictable clamping onset in high-voltage DC systems and avoids premature conduction during nominal operation. The 1.5KE350-E3/54 maintains this specification across its full operating temperature range.
Is the 1.5KE350-E3/54 RoHS compliant and lead-free solder compatible?
Yes, the 1.5KE350-E3/54 carries the E3 suffix, indicating full RoHS compliance and qualification for lead-free soldering processes per J-STD-002 and JESD 22-B102. It also meets JESD 201 Class 1A whisker resistance testing, making it suitable for automated assembly and high-reliability applications. The 1.5KE350-E3/54's matte tin-plated leads ensure consistent wetting and joint integrity.
What is the maximum clamping voltage of the 1.5KE350-E3/54 under surge conditions?
The 1.5KE350-E3/54 exhibits a maximum clamping voltage (VC) of 482 V at its rated peak pulse current (IPPM) of 3.1 A, measured using the standard 10/1000 µs waveform. This value defines the upper voltage limit imposed on protected circuitry during surge events and is critical for ensuring downstream components remain within safe operating limits. The 1.5KE350-E3/54 achieves this with sub-nanosecond response.
Can the 1.5KE350-E3/54 be used in bidirectional configurations?
No, the 1.5KE350-E3/54 is a unidirectional TVS diode, as indicated by the "A" suffix and absence of "CA" in its part number. Bidirectional variants (e.g., 1.5KE350CA) exist only up to 220 V VBR; 1.5KE350A and higher are unidirectional only per Vishay's documentation. Using the 1.5KE350-E3/54 for bidirectional protection would leave negative transients unclamped.
What is the thermal resistance and maximum junction temperature of the 1.5KE350-E3/54?
The 1.5KE350-E3/54 has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W and a maximum junction temperature (TJ) of +175 °C. These values enable operation in high-ambient environments such as enclosed industrial cabinets or under-hood automotive locations. Derating begins above 25 °C ambient, per Figure 2 in Vishay Document 88301. The 1.5KE350-E3/54 retains full surge capability up to its TJ limit.
1.5KE350-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:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 284V
- Voltage - Breakdown (Min):
- 315V
- Voltage - Clamping (Max) @ Ipp:
- 504V
- Current - Peak Pulse (10/1000µs):
- 3A
- 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
1.5KE350-E3/54 FAQ
1.How can I place an order for 1.5KE350-E3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE350-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 1.5KE350-E3/54 reliable?
The price and inventory of 1.5KE350-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 1.5KE350-E3/54 is usually 5 days.
3.What payment methods are accepted for 1.5KE350-E3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE350-E3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE350-E3/54?
1.5KE350-E3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE350-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 1.5KE350-E3/54?
For technical support, including 1.5KE350-E3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE350-E3/54 requirements.
6.How does Aetrix verify that 1.5KE350-E3/54 is sourced from the original manufacturer or authorized distributors?
All 1.5KE350-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 1.5KE350-E3/54 meets industry standards.
7.What is the process for return or replacement of 1.5KE350-E3/54?
All 1.5KE350-E3/54 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE350-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 1.5KE350-E3/54 part is unused and in its original packaging.
Return procedure for 1.5KE350-E3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE350-E3/54 Tags
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