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Vishay General Semiconductor - Diodes Division 1.5KE400CA-E3/51
- Part No.:
- 1.5KE400CA-E3/51
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE400CA-E3/51.pdf
- Description:
- TVS DIODE 342VWM 548VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:7,785
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Product details
Overview
1.5KE400CA-E3/51 from Vishay General Semiconductor is a bidirectional Transient Voltage Suppressor (TVS) diode designed for high-energy surge protection in AC signal lines and power rails. It delivers 1500 W peak pulse power (10/1000 µs), clamps at 548 V (max) under 2.7 A peak pulse current, and operates across –55 °C to +175 °C junction temperature. It is used to protect MOSFETs, ICs, and sensor interfaces against lightning-induced transients in industrial power supplies.
For engineers reviewing the 1.5KE400CA-E3/51 datasheet, 1.5KE400CA-E3/51 pinout, 1.5KE400CA-E3/51 application, or 1.5KE400CA-E3/51 equivalent, key selection criteria include standoff voltage (342 V), clamping voltage (548 V), bidirectional polarity, RoHS-compliant E3 termination, and UL 94 V-0 molded epoxy package.
Technical Context
This device uses a glass-passivated silicon junction optimized for fast transient response (<1 ns) and low incremental surge resistance. Its bidirectional structure enables symmetrical clamping on both polarities without external polarity management, making it suitable for AC-coupled or floating bus protection.
The 1.5KE400CA-E3/51 complies with JEDEC standards for transient suppression and meets JESD 201 Class 1A whisker testing. It is rated for 6.5 W steady-state power dissipation on an infinite heatsink at 75 °C lead temperature and exhibits a breakdown voltage range of 380–420 V at 1 mA test current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 380 V / 420 V - Ensures reliable conduction onset above normal operating voltage while avoiding false triggering |
| VWM | 342 V - Maximum continuous reverse working voltage before leakage exceeds 1 μA |
| VC @ IPPM | 548 V - Clamped voltage during 2.7 A 10/1000 µs surge, defining worst-case stress on protected circuitry |
| PPPM | 1500 W - Peak surge energy handling capacity per single 1 ms pulse, critical for lightning-level transients |
| IPPM | 2.7 A - Peak pulse current corresponding to VC, used to size series impedance and verify margin |
| TJ max | +175 °C - Enables operation in high-temperature environments such as automotive engine bays or industrial enclosures |
| Package | Case Style 1.5KE - Axial-leaded DO-201AD package with 0.375" lead length, UL 94 V-0 compliant epoxy body |
Pinout & Package
1.5KE400CA-E3/51 uses a two-terminal axial-leaded DO-201AD package (Case Style 1.5KE). No polarity marking is present due to its bidirectional construction; both leads are electrically symmetric.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Both terminals serve identical roles; device conducts equally in either direction when voltage exceeds ±VBR |
| Leads (matte tin plated) | Thermal and electrical interface | Solderable per J-STD-002; supports 275 °C solder dip for 10 s; provides thermal path to PCB copper |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enables stable, repeatable breakdown characteristics and long-term reliability under repeated surge stress |
| 1500 W peak pulse power (10/1000 µs) | Meets IEC 61000-4-5 Level 4 surge immunity requirements for industrial equipment |
| Sub-nanosecond response time | Clamps transients before sensitive downstream components experience overvoltage damage |
| UL 94 V-0 epoxy molding | Provides flame-retardant mechanical encapsulation required for safety-certified power systems |
| RoHS-compliant E3 termination | Meets global environmental compliance mandates without compromising solderability or whisker resistance |
Applications
| AC Motor Drive Input Stage | Industrial PLC Analog Input Module |
|---|---|
Use Scenario: Protects rectifier input stage from line-to-line surges induced by contactor switching or nearby lightning strikes. IC Role / Device Role / Timing Role: Bidirectional TVS placed across AC input terminals to clamp common-mode and differential transients before rectification. Use Value: Limits peak voltage to ≤548 V, preventing breakdown of bridge rectifier diodes and upstream EMI filter capacitors. | Use Scenario: Shields 4–20 mA current loop receiver circuitry from field-wiring induced transients in factory automation. IC Role / Device Role / Timing Role: Placed across input terminals of op-amp-based current sense stage to suppress fast-rising common-mode noise. Use Value: Maintains signal integrity by clamping transients within 1 ns, avoiding latch-up or offset drift in precision analog front-ends. |
| Uninterruptible Power Supply (UPS) DC Bus | Automotive Body Control Module (BCM) Power Rail |
Use Scenario: Safeguards bulk capacitor bank and inverter gate drivers from regenerative energy spikes during battery disconnect events. IC Role / Device Role / Timing Role: Connected between DC+ and DC− rails to absorb bidirectional energy surges from inductive load collapse. Use Value: Withstands 1500 W pulses without degradation, ensuring sustained protection across >10,000 surge events per MIL-STD-883H Method 3015.8. | Use Scenario: Protects 12 V supply rail feeding microcontroller, CAN transceivers, and LED drivers from load dump and jump-start transients. IC Role / Device Role / Timing Role: Mounted at main power entry point to shunt surge current away from downstream LDOs and digital ICs. Use Value: Operates up to +175 °C ambient, enabling placement near high-heat zones while maintaining 342 V standoff for nominal 13.5 V system operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ400CA | Lower peak pulse power (400 W), smaller SMA package (vs. DO-201AD), higher clamping ratio (VC/VBR ≈ 1.45 vs. 1.37) | Targeted at space-constrained PCBs where 1500 W rating is not required; unsuitable for direct replacement in high-energy surge environments | Select only if board layout prohibits axial-leaded devices and system-level surge testing confirms 400 W sufficiency |
| ON Semiconductor 1.5SMC400CA | Same 1500 W rating and DO-214AB package; VBR range 380–420 V matches exactly, but thermal resistance RθJA = 60 °C/W (vs. 75 °C/W for 1.5KE400CA-E3/51) | Better thermal performance in surface-mount layouts; requires requalification of solder joint reliability due to different leadframe metallurgy | Prefer for SMT assembly lines; verify compatibility with existing wave solder profiles and IPC-A-610 acceptance criteria |
Compared with 1.5KE400CA-E3/51, SMAJ400CA offers compactness at the cost of surge capacity, while 1.5SMC400CA provides identical electrical specs in a surface-mount format-enabling automated placement but requiring layout revision and thermal validation.
Availability
1.5KE400CA-E3/51 is available at Aetrix Electronics and suitable for industrial motor drives, PLC analog modules, UPS DC buses, and automotive BCM power rails requiring stable component supply and long-lifecycle support.
Supply support for 1.5KE400CA-E3/51 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 industrial-grade qualification.
The 1.5KE family was engineered for high-energy transient suppression in harsh environments-targeting applications where failure modes include lightning strike coupling, inductive switching, and electrostatic discharge in power conversion and control systems.
FAQ
What is the maximum clamping voltage of the 1.5KE400CA-E3/51 under standard surge conditions?
The 1.5KE400CA-E3/51 has a maximum clamping voltage (VC) of 548 V when subjected to its rated peak pulse current of 2.7 A using the 10/1000 µs waveform. This value is measured per JEDEC standard test conditions and defines the upper voltage limit imposed on protected circuitry during a full-power transient event. The 1.5KE400CA-E3/51 maintains this clamping performance across its full operating temperature range.
Is the 1.5KE400CA-E3/51 suitable for automotive applications?
The 1.5KE400CA-E3/51 is not AEC-Q101 qualified; Vishay's AEC-Q101 versions use the HE3 suffix (e.g., 1.5KE400CAHE3_B). While the 1.5KE400CA-E3/51 operates from –55 °C to +175 °C and withstands high surge energy, it lacks the extended reliability testing required for automotive under-hood use. For automotive BCM or powertrain designs, specify the HE3 variant of the 1.5KE400CA-E3/51.
How does the bidirectional configuration of the 1.5KE400CA-E3/51 affect its circuit placement?
The 1.5KE400CA-E3/51 has no polarity marking and conducts identically in both directions, allowing placement across AC lines, floating buses, or differential signal pairs without orientation concerns. Unlike unidirectional TVS diodes, it eliminates the need for series blocking diodes or dual-device configurations in symmetrical protection schemes. This simplifies layout and reduces bill-of-materials count in applications like AC mains input stages.
What is the standoff voltage rating of the 1.5KE400CA-E3/51, and why does it matter?
The 1.5KE400CA-E3/51 has a maximum working voltage (VWM) of 342 V, meaning it remains in high-impedance state below this DC or RMS voltage level. This rating ensures minimal leakage (<1 μA) during normal operation while providing sufficient margin above typical 300 VAC rectified peaks (≈424 VDC) to avoid false triggering. Selecting a VWM too close to system voltage risks premature conduction and thermal runaway.
Can the 1.5KE400CA-E3/51 be used in parallel to increase surge handling capacity?
Parallel connection of 1.5KE400CA-E3/51 devices is not recommended due to parameter spread in VBR (380–420 V), which causes uneven current sharing and potential thermal runaway in one device. For higher energy handling, Vishay recommends using a single higher-rated device (e.g., 3KP400CA) or implementing external current-sharing resistors-though this adds power loss and reduces clamping speed. The 1.5KE400CA-E3/51 is optimized for standalone 1500 W protection.
1.5KE400CA-E3/51 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- TransZorb®
- Packaging:
- Bulk
- 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-E3/51 FAQ
1.How can I place an order for 1.5KE400CA-E3/51 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE400CA-E3/51 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-E3/51 reliable?
The price and inventory of 1.5KE400CA-E3/51 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-E3/51 is usually 5 days.
3.What payment methods are accepted for 1.5KE400CA-E3/51?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE400CA-E3/51 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE400CA-E3/51?
1.5KE400CA-E3/51 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE400CA-E3/51 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-E3/51?
For technical support, including 1.5KE400CA-E3/51 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE400CA-E3/51 requirements.
6.How does Aetrix verify that 1.5KE400CA-E3/51 is sourced from the original manufacturer or authorized distributors?
All 1.5KE400CA-E3/51 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-E3/51 meets industry standards.
7.What is the process for return or replacement of 1.5KE400CA-E3/51?
All 1.5KE400CA-E3/51 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE400CA-E3/51, 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-E3/51 part is unused and in its original packaging.
Return procedure for 1.5KE400CA-E3/51:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE400CA-E3/51 Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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D5V0P1B2LP-7B
Diodes Incorporated
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Diodes Incorporated
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ESD5Z5.0T1G
onsemi
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DESD5V0U1BB-7
Diodes Incorporated
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D12V0L1B2LP-7B
Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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