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Vishay General Semiconductor - Diodes Division 1.5KE350CA-E3/54
- Part No.:
- 1.5KE350CA-E3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE350CA-E3/54.pdf
- Description:
- TVS DIODE 300VWM 482VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:6,168
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Product details
Overview
1.5KE350CA-E3/54 from Vishay General Semiconductor is a bidirectional Transient Voltage Suppressor (TVS) diode designed for high-energy surge protection in power and signal lines. It features a 333 V to 368 V breakdown voltage (VBR), 300 V standoff voltage (VWM), 482 V clamping voltage (VC) at 3.1 A peak pulse current, 1500 W peak pulse power (10/1000 µs), and operates from –55 °C to +175 °C - used to protect MOSFETs, ICs, and sensor interfaces in industrial power supplies and telecom line cards.
For engineers reviewing the 1.5KE350CA-E3/54 datasheet, 1.5KE350CA-E3/54 pinout, 1.5KE350CA-E3/54 application, or 1.5KE350CA-E3/54 equivalent, key selection criteria include bidirectional clamping capability, UL 94 V-0 molded epoxy package, JEDEC 1.5KE case compliance, RoHS-compliant matte tin leads, and suitability for lightning-induced transient suppression per REA PE-60.
Technical Context
This device implements an avalanche breakdown-based clamping mechanism with glass-passivated junction for stable, repeatable transient response. Its bidirectional symmetry ensures identical electrical characteristics in both polarities - critical for AC-coupled or floating signal paths where polarity reversal occurs.
Clamping action initiates within 1 ns, limiting overvoltage before sensitive downstream components sustain damage. The 15.4 °C/W junction-to-lead thermal resistance enables effective heat dissipation into PCB copper or chassis during repetitive surge events, while the 75 °C/W junction-to-ambient rating reflects standard board-mount conditions without heatsinking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 333 V / 368 V - defines minimum voltage at which avalanche conduction begins reliably under 1 mA test current; ensures robust margin above system operating voltage. |
| VWM | 300 V - maximum continuous reverse working voltage; must exceed peak AC or DC rail voltage to prevent leakage or premature conduction. |
| VC @ IPPM | 482 V at 3.1 A - clamped voltage seen by protected circuit during full 1500 W surge; determines worst-case stress on downstream components. |
| PPPM | 1500 W - peak pulse power handling for 10/1000 µs waveform; defines energy absorption capacity for lightning or inductive switching transients. |
| TJ max. | +175 °C - maximum junction temperature; supports operation in high-ambient environments such as enclosed industrial enclosures or automotive under-hood locations. |
| Package | JEDEC 1.5KE - axial-leaded DO-201AD package; provides mechanical robustness, standardized mounting, and thermal path via leads to PCB copper. |
Pinout & Package
1.5KE350CA-E3/54 uses the JEDEC-standard DO-201AD (Case Style 1.5KE) axial-leaded package with no polarity marking - consistent with its bidirectional function. Leads are matte tin-plated and solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional avalanche junction terminal | No functional distinction between leads; either lead may connect to line or return - enables flexible placement in AC or differential circuits. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated chip junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity exposure. |
| 1500 W peak pulse power (10/1000 µs) | Withstands high-energy surges common in telecom line interfaces, industrial motor drives, and AC mains inputs without degradation. |
| Clamping response time ≤ 1 ns | Engages faster than silicon rectifiers or MOVs, protecting nanosecond-sensitive logic and analog front-ends. |
| UL 94 V-0 compliant epoxy body | Provides flame-retardant mechanical encapsulation required for safety-certified end equipment (e.g., UL 62368-1). |
| RoHS-compliant matte tin leads | Enables lead-free reflow compatibility and eliminates whisker risk per JESD 201 Class 1A (E3 suffix). |
Applications
| AC Power Input Protection | Telecom Line Interface |
|---|---|
Use Scenario: Protecting AC-DC converter primary-side circuits against lightning-induced surges on 230 VAC mains input. IC Role / Device Role / Timing Role: Bidirectional TVS placed across L-N and L/N-PE to clamp common-mode and differential-mode transients before rectifier bridge. Use Value: Limits peak voltage to 482 V during 10/1000 µs surges, preventing breakdown of bridge rectifier and bulk capacitor insulation. | Use Scenario: Shielding RS-485 transceivers and isolation transformers in outdoor base station backhaul links. IC Role / Device Role / Timing Role: TVS mounted at connector entry point to absorb induced surges from nearby lightning strikes on twisted-pair cabling. Use Value: Clamps transients to ≤482 V within 1 ns, preserving signal integrity and avoiding latch-up in half-duplex differential receivers. |
| Industrial Sensor Signal Conditioning | MOSFET Gate Driver Protection |
Use Scenario: Safeguarding 4–20 mA current-loop sensors connected to PLC analog inputs in factory automation cabinets. IC Role / Device Role / Timing Role: Bidirectional TVS placed across loop terminals to suppress ESD and inductive kickback from solenoid actuation. Use Value: Withstands 1500 W pulses while maintaining 300 V standoff - avoids false triggering or offset drift in precision current-sense amplifiers. | Use Scenario: Protecting high-side N-channel MOSFET gate drivers in motor control inverters exposed to load dump and flyback energy. IC Role / Device Role / Timing Role: TVS connected between gate and source to clamp Miller-induced voltage spikes during fast switching transitions. Use Value: Fast 1 ns response prevents gate oxide rupture; 482 V clamping ensures safe margin below typical 600 V MOSFET VGS rating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ350CA | Lower peak pulse power (600 W), smaller SMB package (DO-214AA), lower clamping voltage (463 V at 1.3 A) | Better suited for space-constrained PCBs with lower surge threat levels (IEC 61000-4-5 Level 3) | Select when footprint area is limited and surge energy does not exceed 600 W; verify thermal derating for repeated events. |
| 1.5SMC350CA | Same 1500 W rating and 350 V nominal, but SMC (DO-214AB) surface-mount package; slightly higher clamping (485 V at 3.1 A) | Enables automated assembly and improved high-frequency impedance vs. axial leads; requires PCB pad design per JEDEC MO-136 | Choose for production scalability and reduced manual assembly; confirm layout clearance for 1.5 kV isolation requirements. |
Compared with 1.5KE350CA-E3/54, SMBJ350CA trades surge capacity for compactness, while 1.5SMC350CA retains full 1500 W capability in a surface-mount format - enabling trade-offs between manufacturability, board space, and transient severity requirements.
Availability
1.5KE350CA-E3/54 is available at Aetrix Electronics and suitable for industrial power supplies, telecom line cards, factory automation sensor nodes, and motor drive gate driver circuits requiring stable component supply and long-term lifecycle continuity.
Supply support for 1.5KE350CA-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, TVS devices, and optoelectronics with emphasis on reliability, power handling, and industry-standard qualification.
The 1.5KE series was engineered specifically for high-energy transient suppression in harsh environments - targeting applications demanding UL recognition, AEC-Q101 readiness (in HE3 variants), and proven performance against lightning and inductive switching threats.
FAQ
What is the breakdown voltage range for the 1.5KE350CA-E3/54?
The 1.5KE350CA-E3/54 has a specified breakdown voltage (VBR) range of 333 V to 368 V at 1 mA test current, measured in both directions due to its bidirectional construction. This range ensures reliable avalanche initiation while providing margin above its 300 V working voltage - critical for stable operation in 277 VAC or 300 VDC systems where transient headroom is essential. The 1.5KE350CA-E3/54 maintains this specification across its full operating temperature range.
Is the 1.5KE350CA-E3/54 RoHS compliant and lead-free?
Yes, the 1.5KE350CA-E3/54 carries the "E3" suffix, indicating full RoHS compliance per Directive 2011/65/EU and exemption 7a, with matte tin-plated leads qualified to JESD 201 Class 1A for whisker resistance. It contains no lead, mercury, cadmium, hexavalent chromium, PBB, or PBDE - verified through material declarations and third-party testing. The 1.5KE350CA-E3/54 meets all substance restrictions for commercial-grade industrial applications.
How does the clamping voltage of the 1.5KE350CA-E3/54 compare to its breakdown voltage?
The 1.5KE350CA-E3/54 clamps at 482 V when subjected to its rated 3.1 A peak pulse current (IPPM), which is approximately 42 % above its minimum breakdown voltage of 333 V. This incremental clamping voltage (ΔVC = 149 V) reflects the dynamic resistance of the avalanche junction under surge conditions. Designers use this value - not VBR - to determine maximum stress on downstream components during transient events. The 1.5KE350CA-E3/54 delivers predictable clamping behavior due to its glass-passivated junction.
Can the 1.5KE350CA-E3/54 be used in automotive applications?
The standard 1.5KE350CA-E3/54 is commercial grade and not AEC-Q101 qualified; however, Vishay offers the 1.5KE350CAHE3_B variant (with "HE3" suffix) that meets AEC-Q101 for automotive under-hood use. The 1.5KE350CA-E3/54 itself is rated for –55 °C to +175 °C junction temperature and UL 94 V-0 flammability - making it suitable for non-safety-critical automotive subsystems like infotainment power rails or body control module interfaces, provided system-level qualification is performed. Always verify against specific vehicle OEM requirements.
What is the thermal resistance profile of the 1.5KE350CA-E3/54?
The 1.5KE350CA-E3/54 exhibits a typical junction-to-lead thermal resistance (RθJL) of 15.4 °C/W and a junction-to-ambient resistance (RθJA) of 75 °C/W under standard board-mount conditions. This means that with 1.5 W steady-state dissipation, the junction rises ~115 °C above ambient - well within its 175 °C limit. For repetitive surges, thermal mass and PCB copper area dominate transient thermal response. The 1.5KE350CA-E3/54 leverages its axial leads as primary heat paths, so lead length and solder fillet quality directly impact sustained power handling.
1.5KE350CA-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:
- -
- Bidirectional Channels:
- 1
- 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
1.5KE350CA-E3/54 FAQ
1.How can I place an order for 1.5KE350CA-E3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE350CA-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 1.5KE350CA-E3/54 reliable?
The price and inventory of 1.5KE350CA-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 1.5KE350CA-E3/54 is usually 5 days.
3.What payment methods are accepted for 1.5KE350CA-E3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE350CA-E3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE350CA-E3/54?
1.5KE350CA-E3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE350CA-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 1.5KE350CA-E3/54?
For technical support, including 1.5KE350CA-E3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE350CA-E3/54 requirements.
6.How does Aetrix verify that 1.5KE350CA-E3/54 is sourced from the original manufacturer or authorized distributors?
All 1.5KE350CA-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 1.5KE350CA-E3/54 meets industry standards.
7.What is the process for return or replacement of 1.5KE350CA-E3/54?
All 1.5KE350CA-E3/54 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE350CA-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 1.5KE350CA-E3/54 part is unused and in its original packaging.
Return procedure for 1.5KE350CA-E3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE350CA-E3/54 Tags
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Diodes Incorporated
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Diodes Incorporated
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