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Vishay General Semiconductor - Diodes Division 1.5KE400CA-E3/54
- Part No.:
- 1.5KE400CA-E3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE400CA-E3/54.pdf
- Description:
- TVS DIODE 342VWM 548VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:4,465
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Product details
Overview
1.5KE400CA-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 400 V standoff voltage (VWM), 420 V minimum breakdown voltage (VBR), 1500 W peak pulse power rating (10/1000 µs), clamping voltage of 548 V at 2.7 A peak pulse current, and operates across -55 °C to +175 °C junction temperature range - deployed in industrial power supplies and automotive sensor interfaces.
For engineers reviewing the 1.5KE400CA-E3/54 datasheet, 1.5KE400CA-E3/54 pinout, 1.5KE400CA-E3/54 application, or 1.5KE400CA-E3/54 equivalent, this part serves as a RoHS-compliant, commercial-grade bidirectional TVS with verified clamping performance, thermal robustness, and JEDEC-standard 1.5KE package compatibility for legacy board designs requiring lightning- and ESD-induced transient suppression.
Technical Context
This device uses a glass passivated silicon junction optimized for fast response (<1 ns) and low incremental surge resistance. Its bidirectional configuration enables symmetrical clamping in AC-coupled or floating circuits without polarity sensitivity, supporting both differential-mode and common-mode surge suppression.
The 1.5KE400CA-E3/54 complies with UL 497B recognition (QVGQ2) and meets JESD 201 Class 1A whisker testing. It is rated for 1500 W peak pulse power under 10/1000 µs waveform with 0.01% duty cycle, and derates linearly above 25 °C ambient per Fig. 2 in the datasheet.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 342 V - maximum continuous reverse operating voltage before clamping initiates |
| VBR (min) | 380 V - guaranteed breakdown starts no lower than this, ensuring reliable overvoltage threshold |
| VBR (max) | 420 V - upper limit of breakdown spread, critical for tolerance-aware circuit margining |
| VC @ IPPM | 548 V - clamped voltage at 2.7 A peak pulse current, defining worst-case protected node voltage |
| PPPM | 1500 W - peak surge energy handling capability under standardized 10/1000 µs waveform |
| TJ max | +175 °C - maximum junction temperature enabling operation in under-hood automotive or high-ambient industrial environments |
| RθJA | 75 °C/W - thermal resistance from junction to ambient, informing heatsinking requirements for sustained surge duty |
Pinout & Package
Package: DO-201AD (Case Style 1.5KE), axial-leaded, molded epoxy body meeting UL 94 V-0 flammability rating. Matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias | Not used for clamping in bidirectional mode; symmetric conduction enables AC line protection without orientation constraints |
| Cathode | Current exit point in forward bias | Electrically identical to anode in bidirectional operation; no polarity marking on device body |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Enables stable leakage performance and long-term reliability under thermal cycling and humidity stress |
| 1500 W peak pulse power (10/1000 µs) | Supports IEC 61000-4-5 Level 4 surge immunity (4 kV line-to-line, 2 kV line-to-ground) in properly filtered systems |
| Clamping ratio VC/VBR ≈ 1.45 | Indicates efficient voltage limiting with minimal overshoot relative to breakdown threshold |
| Response time <1 ns | Ensures protection of fast-edge digital ICs and analog front-ends before transient energy couples into sensitive nodes |
| UL 497B recognized (QVGQ2) | Validates suitability for telecom and industrial interface protection where regulatory compliance is mandatory |
Applications
| Industrial Motor Drives | Automotive Sensor Interfaces |
|---|---|
Use Scenario: Protection of gate drivers and feedback sensing lines against inductive kickback from 48 V BLDC motor windings. IC Role / Device Role / Timing Role: Bidirectional TVS placed across DC bus inputs and isolated signal paths to clamp transients up to ±1.5 kV. Use Value: Prevents latch-up or permanent damage to isolated amplifiers and microcontrollers during load dump or relay switching events. | Use Scenario: Shielding CAN FD and LIN bus transceivers from ESD and coupled surges in engine control modules. IC Role / Device Role / Timing Role: Standoff-rated TVS mounted at connector entry points to shunt fast transients before reaching PHY layer. Use Value: Maintains communication integrity during ISO 10605 30 kV contact discharge and ISO 7637-2 pulse 5a/b exposure. |
| AC Power Input Stages | Telecom Line Cards |
Use Scenario: Secondary-side surge suppression on 230 VAC rectified outputs feeding SMPS controllers. IC Role / Device Role / Timing Role: Bidirectional clamping device placed across bulk capacitor terminals to absorb residual line surges. Use Value: Limits voltage excursion to ≤550 V during 6 kV ring wave tests, preserving electrolytic capacitor lifetime and MOSFET SOA. | Use Scenario: Overvoltage protection on POTS line interface circuits exposed to lightning-induced longitudinal surges. IC Role / Device Role / Timing Role: Primary protector in R.E.A. PE.60-compliant telecom demarcation equipment. Use Value: Withstands 10/1000 µs impulses up to 1500 W while maintaining <5 µA leakage at 342 V, minimizing standby power loss. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ400CA | Lower PPPM (600 W), smaller SMB package (vs. DO-201AD), higher VBR tolerance (±5% vs. ±10%) | Preferred for space-constrained PCBs with lower surge threat levels (IEC 61000-4-5 Level 2) | Select when footprint reduction and tighter VBR tolerance outweigh peak power needs |
| 1.5SMC400CA | Same 1500 W rating and DO-214AB package, but higher VF (5.0 V) and different thermal resistance (RθJA = 50 °C/W) | Better suited for high-repetition-rate surge environments due to improved thermal dissipation | Choose when board-level airflow or copper area allows enhanced heat spreading and repetitive surge duty is expected |
Compared with 1.5KE400CA-E3/54, SMBJ400CA trades peak power and thermal robustness for compactness, while 1.5SMC400CA matches power rating but shifts thermal management strategy - making the 1.5KE400CA-E3/54 optimal for legacy through-hole designs prioritizing mechanical ruggedness and proven field reliability.
Availability
1.5KE400CA-E3/54 is available at Aetrix Electronics and suitable for industrial motor drives, automotive sensor interfaces, AC power input stages, and telecom line cards requiring stable component supply across extended production lifecycles.
Supply support for 1.5KE400CA-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 industry certifications.
The 1.5KE series was engineered for high-energy transient suppression in harsh environments - targeting industrial automation, transportation, and infrastructure applications where failure modes must be mitigated without active control circuitry.
FAQ
What is the clamping voltage of the 1.5KE400CA-E3/54 at its rated peak pulse current?
The 1.5KE400CA-E3/54 has a maximum clamping voltage (VC) of 548 V when subjected to its specified peak pulse current (IPPM) of 2.7 A under a 10/1000 µs waveform. This value defines the upper voltage limit imposed on protected circuitry during a full-rated surge event and is measured per JEDEC standard test conditions at TA = 25 °C.
Is the 1.5KE400CA-E3/54 suitable for automotive applications?
The 1.5KE400CA-E3/54 is a commercial-grade device and not AEC-Q101 qualified. While it operates across -55 °C to +175 °C and is used in some automotive sensor interfaces, Vishay only certifies variants with HE3 suffix (e.g., 1.5KE400CAHE3_B) for AEC-Q101. For production automotive ECUs, 1.5KE400CA-E3/54 should be validated per system-level requirements and may require additional qualification testing.
How does the bidirectional configuration of the 1.5KE400CA-E3/54 affect its mounting and circuit integration?
The 1.5KE400CA-E3/54 has no polarity marking and functions identically in both directions, eliminating orientation concerns during placement. This symmetry allows direct integration across AC-coupled lines, transformer secondaries, or differential buses like RS-485 without regard to anode/cathode alignment - simplifying layout and reducing assembly errors compared to unidirectional TVS diodes.
What is the maximum steady-state power dissipation of the 1.5KE400CA-E3/54?
The 1.5KE400CA-E3/54 has a maximum steady-state power dissipation (PD) of 6.5 W when mounted on an infinite heatsink at lead temperature (TL) of 75 °C. This rating assumes ideal thermal conduction and is not intended for continuous DC operation; the device is designed for transient suppression only, with average power limited by duty cycle and thermal mass of the PCB.
Does the 1.5KE400CA-E3/54 meet UL safety certification requirements?
Yes, the 1.5KE400CA-E3/54 is Underwriters Laboratories (UL) recognized under file E136766 for both unidirectional and bidirectional configurations, complying with UL 497B for protectors used in telecommunications and signal line applications. This certification covers construction, flammability (UL 94 V-0), and electrical safety performance under defined surge conditions.
1.5KE400CA-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):
- 342V
- Voltage - Breakdown (Min):
- 380V
- Voltage - Clamping (Max) @ Ipp:
- 548V
- Current - Peak Pulse (10/1000µs):
- 2.7A
- 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
1.5KE400CA-E3/54 FAQ
1.How can I place an order for 1.5KE400CA-E3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE400CA-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 1.5KE400CA-E3/54 reliable?
The price and inventory of 1.5KE400CA-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 1.5KE400CA-E3/54 is usually 5 days.
3.What payment methods are accepted for 1.5KE400CA-E3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE400CA-E3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE400CA-E3/54?
1.5KE400CA-E3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE400CA-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 1.5KE400CA-E3/54?
For technical support, including 1.5KE400CA-E3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE400CA-E3/54 requirements.
6.How does Aetrix verify that 1.5KE400CA-E3/54 is sourced from the original manufacturer or authorized distributors?
All 1.5KE400CA-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 1.5KE400CA-E3/54 meets industry standards.
7.What is the process for return or replacement of 1.5KE400CA-E3/54?
All 1.5KE400CA-E3/54 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE400CA-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 1.5KE400CA-E3/54 part is unused and in its original packaging.
Return procedure for 1.5KE400CA-E3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE400CA-E3/54 Tags
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