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Vishay General Semiconductor - Diodes Division 1.5KE350CA-E3/73
- Part No.:
- 1.5KE350CA-E3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE350CA-E3/73.pdf
- Description:
- TVS DIODE 300VWM 482VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:5,037
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Product details
Overview
1.5KE350CA-E3/73 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 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, ICs, and sensor interfaces against lightning-induced transients and inductive switching surges.
For engineers reviewing the 1.5KE350CA-E3/73 datasheet, 1.5KE350CA-E3/73 pinout, 1.5KE350CA-E3/73 application, or 1.5KE350CA-E3/73 equivalent, this device serves as a robust, AEC-Q101-qualified (HE3 variant) or commercial-grade (E3) overvoltage clamp for industrial power supplies, automotive body electronics, telecom line cards, and embedded sensor front-ends requiring fast sub-nanosecond response and low incremental surge resistance.
Technical Context
The 1.5KE350CA-E3/73 implements a glass-passivated silicon junction optimized for bidirectional transient suppression with symmetrical clamping in both polarities. Its 10/1000 µs waveform rating delivers 1500 W peak pulse power, while thermal resistance of 15.4 °C/W (junction-to-lead) supports reliable energy dissipation without heatsinking under short-duration surges.
It exhibits a temperature coefficient of VBR of +0.110 %/°C and maintains stable clamping performance up to 175 °C junction temperature. With <1 ns response time and no wear-out mechanism, it provides repeatable protection against repetitive transients such as EFT and lightning surges per IEC 61000-4-5.
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 during line tolerance excursions. |
| VWM | 300 V - Maximum continuous reverse working voltage; defines safe operating margin below breakdown for 230 VAC-derived DC rails. |
| VC @ IPPM | 482 V - Clamping voltage at peak pulse current; limits downstream component stress during 1500 W transient events. |
| IPPM | 3.1 A - Peak pulse current capability under 10/1000 µs waveform; determines surge energy handling (≈ 1.5 J). |
| PPPM | 1500 W - Peak pulse power rating; enables protection against high-energy transients like lightning surges on AC mains or telecom lines. |
| TJ range | –55 °C to +175 °C - Supports operation in harsh environments including engine compartments and industrial enclosures. |
| Package | DO-201AD (Case Style 1.5KE) - Standard axial-leaded package with 0.375" lead length; compatible with through-hole PCB assembly and manual repair. |
Pinout & Package
1.5KE350CA-E3/73 uses the DO-201AD axial package (Case Style 1.5KE), with no polarity marking for bidirectional operation. Leads are matte tin-plated, solderable per J-STD-002 and JESD 22-B102, rated for 275 °C dip soldering (10 s max). The device has two terminals: anode and cathode, functionally identical due to symmetrical construction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (negative polarity) | Conducts during negative-going surges; forms symmetrical clamping path with cathode. |
| Cathode | Transient current entry (positive polarity) | Conducts during positive-going surges; completes bidirectional clamping loop with anode. |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Enables stable, low-leakage operation (<1 µA at VWM) and long-term reliability under humidity and thermal cycling. |
| 1500 W peak pulse power (10/1000 µs) | Supports IEC 61000-4-5 Level 4 (4 kV/2 Ω) surge immunity without external series impedance in many applications. |
| <1 ns response time | Clamps transients before sensitive downstream components (e.g., MCU I/O, gate drivers) experience damaging overvoltage. |
| Low incremental surge resistance | Minimizes voltage overshoot during high di/dt events, improving clamping precision for fast-rising transients. |
| RoHS-compliant E3 suffix | Meets JESD 201 Class 1A whisker test; suitable for commercial and industrial applications with lead-free assembly requirements. |
Applications
| Industrial Power Supply Input Protection | Automotive Body Control Module (BCM) Signal Lines |
|---|---|
Use Scenario: Protects AC/DC converter inputs from lightning-induced surges on 230 VAC mains or 48 V DC distribution buses. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across input terminals to shunt surge current away from rectifier bridge and bulk capacitor. Use Value: Limits transient voltage to ≤482 V, preventing dielectric breakdown in electrolytic capacitors and overvoltage failure in bridge diodes. |
Use Scenario: Shields LIN/CAN transceiver I/O pins and microcontroller GPIOs from load-dump and jump-start transients in vehicle body electronics. IC Role / Device Role / Timing Role: Fast-acting TVS placed at connector interface to absorb 100 V/50 ms load-dump energy before it reaches silicon. Use Value: Maintains signal integrity by clamping within 1 ns, ensuring transceivers remain functional after repeated 12 V system surges. |
| Telecom Line Card Surge Protection | Industrial Sensor Interface Protection |
Use Scenario: Installed on POTS or xDSL line interfaces to meet GR-1089-CORE and ITU-T K.20/K.21 immunity requirements. IC Role / Device Role / Timing Role: Primary surge suppressor on tip/ring pair, coordinated with gas discharge tube (GDT) for staged protection. Use Value: Handles 1500 W coupling surges while maintaining low capacitance (<100 pF), preserving high-frequency signal fidelity up to 1 MHz. |
Use Scenario: Safeguards 4–20 mA current-loop sensors and RS-485 nodes in factory automation against ESD and inductive kickback from solenoid valves. IC Role / Device Role / Timing Role: Bidirectional clamp across differential bus lines or supply rail to ground, absorbing ±2 kV ESD per IEC 61000-4-2. Use Value: Prevents latch-up and gate oxide damage in analog front-end ICs by limiting transient voltage to 482 V with minimal leakage at 300 V operating bias. |
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 | DO-214AA package; lower 600 W PPPM; 482 V VC at 1.25 A; smaller footprint but reduced energy handling. | Better suited for space-constrained PCBs with lower surge threat levels (e.g., IEC 61000-4-2 only); not rated for 10/1000 µs lightning surges. | Select SMBJ350CA when board area is critical and peak surge energy remains below 0.6 J; retain 1.5KE350CA-E3/73 for full 1.5 J lightning compliance. |
| 1.5SMC350CA | SMD package (DO-214AB); same 1500 W rating and VBR/VC specs; higher thermal resistance (RθJA = 50 °C/W vs. 15.4 °C/W). | Enables automated assembly but requires careful thermal layout; less effective in high-ambient or high-duty-cycle surge environments. | Choose 1.5SMC350CA for reflow-compatible designs where mechanical robustness and leaded serviceability are secondary to production efficiency. |
Compared with SMBJ350CA and 1.5SMC350CA, the 1.5KE350CA-E3/73 delivers superior thermal performance via its low RθJL and proven axial-leaded reliability in high-energy, high-temperature deployments-making it preferred for mains-connected and automotive under-hood applications where surge repetition and ambient heat are critical.
Availability
1.5KE350CA-E3/73 is available at Aetrix Electronics and suitable for industrial power supplies, automotive body electronics, telecom line protection, and sensor interface circuits requiring stable component supply and long-lifecycle support.
Supply support for 1.5KE350CA-E3/73 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 automotive qualification.
The 1.5KE series was engineered for high-energy transient suppression in demanding environments-targeting industrial, automotive, and telecom infrastructure where robustness against lightning, EFT, and load dump is non-negotiable.
FAQ
What is the breakdown voltage range for the 1.5KE350CA-E3/73?
The 1.5KE350CA-E3/73 has a guaranteed breakdown voltage (VBR) range of 333 V to 368 V at 1.0 mA test current, measured per JEDEC standard. This range ensures consistent clamping behavior across production lots and supports design margining for 300 V nominal systems. The 1.5KE350CA-E3/73 achieves this specification using a glass-passivated silicon junction with tight process control.
Is the 1.5KE350CA-E3/73 suitable for automotive applications?
The 1.5KE350CA-E3/73 is RoHS-compliant and qualified to commercial temperature grade (–55 °C to +175 °C), but it is not AEC-Q101 certified. For automotive use, Vishay offers the HE3-suffix variant (e.g., 1.5KE350CAHE3_B), which carries AEC-Q101 qualification. The 1.5KE350CA-E3/73 itself is appropriate for non-safety-critical industrial or telecom applications where AEC-Q101 is not mandated.
How does the 1.5KE350CA-E3/73 compare to unidirectional TVS diodes in circuit design?
Unlike unidirectional TVS diodes, the 1.5KE350CA-E3/73 provides symmetrical clamping for both positive and negative transients without requiring polarity-aware placement. This simplifies layout in AC-coupled or floating signal paths and eliminates risk of reverse installation. Its bidirectional nature makes the 1.5KE350CA-E3/73 ideal for protecting differential buses, transformer-coupled interfaces, and dual-supply circuits.
What is the maximum clamping voltage of the 1.5KE350CA-E3/73 under surge conditions?
The 1.5KE350CA-E3/73 clamps to a maximum of 482 V at its rated peak pulse current (IPPM = 3.1 A) under a 10/1000 µs waveform. This value is measured per industry standard and defines the upper voltage limit imposed on protected circuitry during worst-case surge events. Designers use this parameter to verify that downstream components remain within their absolute maximum ratings when the 1.5KE350CA-E3/73 is active.
Can the 1.5KE350CA-E3/73 be used in parallel to increase surge handling capacity?
Yes, multiple 1.5KE350CA-E3/73 units can be paralleled to increase total peak pulse power handling, provided they are matched for VBR (within 5 %) and mounted with symmetric thermal paths. However, derating is required due to current-sharing imbalance; Vishay recommends limiting parallel configurations to two devices and verifying clamping performance empirically. The 1.5KE350CA-E3/73's low incremental resistance aids balanced sharing compared to higher-VBR variants.
1.5KE350CA-E3/73 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- TransZorb®
- Packaging:
- Tape & Box (TB)
- 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-E3/73 FAQ
1.How can I place an order for 1.5KE350CA-E3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE350CA-E3/73 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-E3/73 reliable?
The price and inventory of 1.5KE350CA-E3/73 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-E3/73 is usually 5 days.
3.What payment methods are accepted for 1.5KE350CA-E3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE350CA-E3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE350CA-E3/73?
1.5KE350CA-E3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE350CA-E3/73 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-E3/73?
For technical support, including 1.5KE350CA-E3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE350CA-E3/73 requirements.
6.How does Aetrix verify that 1.5KE350CA-E3/73 is sourced from the original manufacturer or authorized distributors?
All 1.5KE350CA-E3/73 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-E3/73 meets industry standards.
7.What is the process for return or replacement of 1.5KE350CA-E3/73?
All 1.5KE350CA-E3/73 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE350CA-E3/73, 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-E3/73 part is unused and in its original packaging.
Return procedure for 1.5KE350CA-E3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE350CA-E3/73 Tags
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DESD3V3E1BL-7B
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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Toshiba Semiconductor and Storage
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Diodes Incorporated
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