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Vishay General Semiconductor - Diodes Division 1.5KE400CA-E3/73
- Part No.:
- 1.5KE400CA-E3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE400CA-E3/73.pdf
- Description:
- TVS DIODE 342VWM 548VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:4,652
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Product details
Overview
1.5KE400CA-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 400 V standoff voltage (VWM), 420 V minimum breakdown voltage (VBR), 1500 W peak pulse power (10/1000 µs), clamping voltage of 548 V at 2.7 A IPPM, 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 1.5KE400CA-E3/73 datasheet, 1.5KE400CA-E3/73 pinout, 1.5KE400CA-E3/73 application, or 1.5KE400CA-E3/73 equivalent, this device is selected for robust overvoltage clamping in industrial motor drives, telecom line cards, and automotive body control modules where bidirectional transient immunity and UL 94 V-0 epoxy packaging are required.
Technical Context
This TVS diode uses a glass-passivated silicon junction optimized for sub-nanosecond response (<1 ns) and low incremental surge resistance. Its bidirectional architecture enables symmetrical clamping in AC-coupled or floating circuits without polarity constraints.
It delivers 1500 W peak pulse power under standardized 10/1000 µs waveform conditions with 0.01% duty cycle, and maintains stable clamping performance up to 175 °C junction temperature - validated per JEDEC standards and compliant with UL 497B recognition (QVGQ2).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 342 V - Maximum continuous reverse voltage before clamping begins; defines safe operating margin below breakdown. |
| VBR (Breakdown Voltage) | 380–420 V at 1 mA - Confirmed minimum/maximum threshold where avalanche conduction initiates reliably. |
| VC (Clamping Voltage) | 548 V at 2.7 A IPPM - Peak voltage seen by protected circuit during full-rated surge; determines stress on downstream components. |
| PPPM | 1500 W - Surge energy handling capability under 10/1000 µs waveform; supports IEC 61000-4-5 Level 4 compliance when properly laid out. |
| Operating Temperature | –55 °C to +175 °C - Enables deployment in under-hood automotive, industrial PLCs, and outdoor telecom equipment. |
| Package | Case Style 1.5KE - Axial-leaded DO-201AD package with matte tin-plated leads, UL 94 V-0 molded epoxy body. |
| Leakage Current | 1.0 µA max at VWM - Ensures minimal standby power loss and signal integrity in high-impedance sensing paths. |
Pinout & Package
1.5KE400CA-E3/73 uses the standard axial-leaded DO-201AD (Case Style 1.5KE) package. Bidirectional construction means no cathode/anode marking; both terminals are electrically symmetric.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient current path | Both terminals conduct identically during positive or negative surges; no polarity orientation required during PCB placement. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enables stable avalanche characteristics and long-term reliability under repeated surge stress without parameter drift. |
| 1500 W peak pulse power (10/1000 µs) | Supports protection against severe transients including indirect lightning (IEC 61000-4-5) and load dump in 24 V systems. |
| Sub-nanosecond response time | Clamps within <1 ns - faster than MOVs or polymer-based protectors - preserving timing-critical signals in data lines. |
| UL 497B recognized (QVGQ2) | Validated for telecom and industrial surge protection applications requiring third-party safety certification. |
| RoHS-compliant, commercial grade | E3 suffix confirms JESD 201 Class 1A whisker resistance and lead-free solder compatibility (275 °C, 10 s). |
Applications
| Industrial Motor Drives | Telecom Line Cards |
|---|---|
Use Scenario: Protection of gate drivers and bus voltage sense circuits against switching spikes and EFT bursts in variable-frequency drives. IC Role / Device Role: Primary overvoltage clamp placed across DC bus or isolated gate supply rails. Use Value: Limits transient voltage to ≤548 V, preventing gate oxide rupture in 600 V IGBTs and ensuring >100,000 surge cycles per MIL-STD-883H Method 3015.7. |
Use Scenario: Surge suppression on POTS or xDSL line interfaces exposed to induced lightning per ITU-T K.20/K.21. IC Role / Device Role: Bidirectional shunt protector between tip/ring and ground, upstream of line interface ICs. Use Value: Clamps common-mode surges to <600 V while maintaining <1 µA leakage at 342 V, preserving line impedance and echo cancellation performance. |
| Automotive Body Control Modules | Consumer Power Adapters |
Use Scenario: Input-stage protection for 12 V/24 V BCMs subjected to ISO 7637-2 Pulse 1, 2a, and 5a transients. IC Role / Device Role: Secondary-level TVS after primary LC filtering, placed directly at connector entry point. Use Value: Withstands 1500 W pulses without degradation and operates up to +175 °C ambient, meeting AEC-Q101 qualification requirements for under-hood use. |
Use Scenario: Secondary-side overvoltage clamp in universal-input AC/DC adapters protecting output rectifiers and feedback optocouplers. IC Role / Device Role: Bidirectional suppressor across secondary winding or post-rectifier output. Use Value: Prevents latch-up in TL431-based feedback circuits during output short-circuit recovery or input surge events, with no forward voltage penalty due to symmetry. |
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 | DO-214AA (SMB) package, 600 W rating, lower IPPM (1.2 A), smaller footprint | Better suited for space-constrained PCBs but requires derating for >1 kV surge events | Select SMBJ400CA only if board area is critical and peak surge energy remains ≤600 W; not drop-in for 1500 W requirements. |
| 1.5SMC400CA | Surface-mount SMC package, same 1500 W rating, identical VWM/VBR/VC specs, RoHS/E3 compliant | Enables automated assembly and higher density layouts; thermal path differs due to SMT pad design | 1.5SMC400CA is functionally equivalent and suitable for new designs targeting SMT production; requires updated land pattern and reflow profile validation. |
Compared with 1.5KE400CA-E3/73, SMBJ400CA offers compactness at reduced surge capacity, while 1.5SMC400CA matches its 1500 W performance in an SMT format - making it the preferred upgrade path for volume manufacturing without sacrificing clamping integrity.
Availability
1.5KE400CA-E3/73 is available at Aetrix Electronics and suitable for industrial motor drives, telecom line cards, and automotive body control modules requiring stable component supply, long-lifecycle support, and traceable RoHS-compliant sourcing.
Supply support for 1.5KE400CA-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 high-reliability diodes, MOSFETs, and passive components for industrial, automotive, and computing markets.
The 1.5KE series was engineered specifically for high-energy transient suppression in harsh environments - emphasizing rugged packaging, repeatable clamping, and extended temperature operation beyond standard commercial grades.
FAQ
What is the clamping voltage of the 1.5KE400CA-E3/73 under maximum rated surge current?
The 1.5KE400CA-E3/73 clamps to 548 V at its specified peak pulse current (IPPM) of 2.7 A under a 10/1000 µs waveform. This value is measured per JEDEC standard test conditions and represents the maximum voltage imposed on protected circuitry during a full-rated transient event. The 1.5KE400CA-E3/73 maintains this clamping performance consistently across its operational temperature range.
Is the 1.5KE400CA-E3/73 suitable for automotive applications?
The 1.5KE400CA-E3/73 is rated for operation from –55 °C to +175 °C and meets UL 497B recognition, making it suitable for under-hood automotive applications such as body control modules and lighting drivers. However, it is a commercial-grade part (E3 suffix); for AEC-Q101-qualified versions, select the HE3 variant (e.g., 1.5KE400CAHE3_B), which undergoes additional stress testing per automotive reliability standards.
How does the bidirectional configuration of the 1.5KE400CA-E3/73 affect PCB layout?
The 1.5KE400CA-E3/73 has no polarity marking and conducts identically in both directions, eliminating orientation concerns during placement. This simplifies layout in AC-coupled or floating circuits (e.g., telecom tip/ring lines or transformer-isolated supplies). Unlike unidirectional TVS diodes, no cathode band alignment is needed - reducing assembly errors and enabling symmetric trace routing for balanced surge current sharing.
What is the maximum leakage current of the 1.5KE400CA-E3/73 at its standoff voltage?
At its maximum standoff voltage (VWM) of 342 V and TA = 25 °C, the 1.5KE400CA-E3/73 exhibits a maximum reverse leakage current (ID) of 1.0 µA. This low leakage ensures minimal power loss and avoids false triggering in high-impedance monitoring circuits, supporting accurate voltage sensing and low-quiescent-current system designs.
Can the 1.5KE400CA-E3/73 be used in parallel to increase surge handling capacity?
Yes - multiple 1.5KE400CA-E3/73 devices can be paralleled to increase total peak pulse power, provided they are matched for VBR (within ±5%) and mounted with symmetrical thermal paths. Parallel operation requires careful PCB layout to ensure equal current sharing; mismatched units may lead to uneven stress and premature failure. Derating guidelines per Vishay Application Note AN999 apply.
1.5KE400CA-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):
- 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-E3/73 FAQ
1.How can I place an order for 1.5KE400CA-E3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE400CA-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 1.5KE400CA-E3/73 reliable?
The price and inventory of 1.5KE400CA-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 1.5KE400CA-E3/73 is usually 5 days.
3.What payment methods are accepted for 1.5KE400CA-E3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE400CA-E3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE400CA-E3/73?
1.5KE400CA-E3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE400CA-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 1.5KE400CA-E3/73?
For technical support, including 1.5KE400CA-E3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE400CA-E3/73 requirements.
6.How does Aetrix verify that 1.5KE400CA-E3/73 is sourced from the original manufacturer or authorized distributors?
All 1.5KE400CA-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 1.5KE400CA-E3/73 meets industry standards.
7.What is the process for return or replacement of 1.5KE400CA-E3/73?
All 1.5KE400CA-E3/73 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE400CA-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 1.5KE400CA-E3/73 part is unused and in its original packaging.
Return procedure for 1.5KE400CA-E3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE400CA-E3/73 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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Diodes Incorporated
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Diodes Incorporated
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onsemi
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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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