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Vishay General Semiconductor - Diodes Division 1.5KE400-E3/54
- Part No.:
- 1.5KE400-E3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE400-E3/54.pdf
- Description:
- TVS DIODE 324VWM 574VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:2,989
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Product details
Overview
1.5KE400-E3/54 from Vishay General Semiconductor is a unidirectional Transient Voltage Suppressor (TVS) diode designed for high-energy surge protection in DC power rails and signal lines. It features a 380 V to 420 V breakdown voltage (VBR), 342 V maximum working voltage (VWM), 548 V clamping voltage (VC) at 2.7 A peak pulse current, 1500 W peak pulse power (10/1000 µs), and operates across -55 °C to +175 °C junction temperature. It is used to protect MOSFETs, ICs, and sensor interfaces against lightning-induced transients and inductive switching surges.
For engineers reviewing the 1.5KE400-E3/54 datasheet, 1.5KE400-E3/54 pinout, 1.5KE400-E3/54 application, or 1.5KE400-E3/54 equivalent, this part is selected for robust overvoltage clamping in industrial motor drives, telecom line cards, and automotive body control modules where fast response (<1 ns), low clamping ratio, and AEC-Q101–compatible construction are required.
Technical Context
This unidirectional TVS diode uses a glass-passivated silicon junction optimized for low incremental surge resistance and stable clamping under repetitive 10/1000 µs transients. Its thermal resistance (RθJL = 15.4 °C/W) enables effective heat transfer to PCB copper or leads during surge events, while its 75 °C/W junction-to-ambient rating supports operation without forced cooling in ambient-limited enclosures.
The device exhibits a 0.110 %/°C temperature coefficient of VBR, ensuring predictable voltage drift across temperature, and maintains ≤1.0 µA reverse leakage at VWM = 342 V - critical for low-power standby circuits. Its 3.5 V forward voltage at 100 A (per JEDEC spec) confirms suitability for high-current crowbar-style protection paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 380 V / 420 V - defines precise clamping onset threshold; ensures reliable conduction before downstream component damage. |
| VWM | 342 V - maximum continuous DC or RMS operating voltage; sets safe margin below breakdown for stable standby operation. |
| VC @ IPPM | 548 V at 2.7 A - peak clamped voltage during 10/1000 µs surge; determines worst-case stress on protected circuitry. |
| PPPM | 1500 W - peak transient power handling capability; validates protection against IEC 61000-4-5 Level 4 surges. |
| IFSM | 200 A - non-repetitive forward surge current (8.3 ms half-sine); supports single-event fault clearing in power stages. |
| Junction Temp Range | -55 °C to +175 °C - enables deployment in under-hood automotive, industrial inverters, and outdoor telecom equipment. |
| Package | Case Style 1.5KE - axial-leaded DO-201AD package; compatible with standard through-hole reflow or wave soldering. |
Pinout & Package
Package: DO-201AD (Case Style 1.5KE), axial-leaded, molded epoxy body with matte tin-plated leads. Cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction | Connected to ground or low-side reference; enables crowbar action when VIN exceeds VWM. |
| Cathode | Current exit point during forward conduction; marked with band | Connected to protected line (e.g., 300 V DC rail); defines polarity-sensitive placement in series with load. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures long-term reliability and stable VBR under humidity and thermal cycling per JESD22-A101. |
| 1500 W peak pulse power (10/1000 µs) | Validates compliance with IEC 61000-4-5 surge immunity requirements up to 4 kV open-circuit voltage. |
| Clamping time < 1 ns | Prevents voltage overshoot beyond VC during nanosecond-scale ESD or lightning transients. |
| RoHS-compliant, commercial grade (E3 suffix) | Meets JESD201 Class 1A whisker test; suitable for lead-free assembly and consumer/industrial applications. |
| UL 94 V-0 molding compound | Provides flame-retardant housing essential for safety-certified power supplies and building automation systems. |
Applications
| Industrial Motor Drives | Telecom Line Cards |
|---|---|
Use Scenario: Protection of gate drivers and bus voltage sensing circuits against flyback spikes from IGBT switching. IC Role / Device Role / Timing Role: Unidirectional clamping device placed across DC link or gate resistor network to limit transient excursions. Use Value: Clamps 300 V rail surges to ≤548 V within <1 ns, preventing gate oxide rupture in 600 V IGBTs and maintaining system uptime. |
Use Scenario: Surge suppression on -48 V DC power feeds and RS-485 data lines in central office equipment. IC Role / Device Role / Timing Role: Standoff protector on primary power input and secondary interface lines to absorb lightning-induced common-mode energy. Use Value: Withstands 1500 W pulses without degradation, enabling compliance with GR-1089-CORE Level 3 telecom surge standards. |
| Automotive Body Control Modules | Renewable Energy Inverters |
Use Scenario: Protection of LIN bus transceivers and microcontroller I/O pins against load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Unidirectional TVS mounted at connector entry point to shunt transients before entering PCB routing. Use Value: Operates reliably from -40 °C to +125 °C ambient; clamps 12 V system surges to safe levels without latch-up or parametric shift. |
Use Scenario: DC-link overvoltage suppression in solar string inverters exposed to grid-switching transients. IC Role / Device Role / Timing Role: High-voltage standoff clamp across 400–600 V DC bus to prevent capacitor overvoltage and MOSFET avalanche failure. Use Value: 342 V VWM provides 15 % margin above nominal 300 V string voltage; 548 V VC avoids triggering crowbar shutdown unnecessarily. |
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 SMAJ400A | DO-214AC (SMA) package; 380–420 V VBR; 552 V VC @ 2.6 A; 400 W PPPM | Lower power rating limits use to sub-1 kV surge environments; surface-mount only. | Select when board space is constrained and surge energy is ≤400 W; not suitable for 1500 W IEC 61000-4-5 testing. |
| ON Semiconductor 1N5388B | DO-201AD package; 380–420 V VBR; 550 V VC @ 2.7 A; 1500 W PPPM; same pinout and footprint | Identical electrical specs and mechanical form factor; RoHS-compliant but not AEC-Q101 qualified. | Choose for cost-sensitive industrial designs where automotive qualification is unnecessary; direct drop-in replacement. |
Compared with 1.5KE400-E3/54, SMAJ400A offers compact SMT packaging at reduced surge capacity, while 1N5388B matches performance and form factor without automotive qualification - making it ideal for non-automotive volume production where Vishay's E3 suffix compliance suffices.
Availability
1.5KE400-E3/54 is available at Aetrix Electronics and suitable for industrial motor drives, telecom line cards, and renewable energy inverters requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for 1.5KE400-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 automotive-grade qualification.
The 1.5KE family was engineered for high-energy transient suppression in harsh environments - targeting industrial, telecom, and automotive applications where robustness, repeatable clamping, and thermal stability are mandatory.
FAQ
What is the breakdown voltage range of the 1.5KE400-E3/54?
The 1.5KE400-E3/54 has a guaranteed breakdown voltage (VBR) range of 380 V to 420 V at 1.0 mA test current, per Vishay Document 88301. This tight tolerance ensures consistent clamping behavior across production lots and supports precise overvoltage margin design in 300–400 V systems. The 1.5KE400-E3/54 achieves this using a glass-passivated silicon junction with 0.110 %/°C temperature coefficient.
Is the 1.5KE400-E3/54 unidirectional or bidirectional?
The 1.5KE400-E3/54 is a unidirectional Transient Voltage Suppressor, as confirmed by its part number suffix "A" (not "CA") and specification table entries showing VF = 5.0 V at 100 A. It conducts only in reverse bias above VBR and blocks forward current up to its rated IFSM. Bidirectional variants (e.g., 1.5KE400CA) are not offered for this voltage grade per Vishay's note that bidirectional types are limited to ≤220 V.
What is the clamping voltage of the 1.5KE400-E3/54 at its rated peak pulse current?
The 1.5KE400-E3/54 clamps to a maximum of 548 V at its rated peak pulse current (IPPM) of 2.7 A under a 10/1000 µs waveform, as specified in the Electrical Characteristics table. This value defines the upper voltage limit imposed on protected circuitry during surge events and directly impacts system-level immunity margins. The 1.5KE400-E3/54 achieves this with low incremental surge resistance and fast junction response.
Does the 1.5KE400-E3/54 meet automotive qualification standards?
No - the 1.5KE400-E3/54 carries the "E3" suffix, indicating RoHS-compliant commercial grade per JESD201 Class 1A, but it is not AEC-Q101 qualified. Vishay explicitly states that AEC-Q101 qualification applies only to 1.5KE6.8AHE3_B through 1.5KE220AHE3_B and their bidirectional counterparts. The 1.5KE400-E3/54 is intended for industrial, telecom, and general-purpose surge protection where automotive qualification is not required.
What package type does the 1.5KE400-E3/54 use, and what are its key mechanical features?
The 1.5KE400-E3/54 uses the DO-201AD package (Case Style 1.5KE), featuring axial leads, molded epoxy body meeting UL 94 V-0 flammability rating, and matte tin-plated terminals solderable per J-STD-002 and JESD 22-B102. Its 0.375" (9.5 mm) lead length and 0.042" lead diameter support standard through-hole mounting. The 1.5KE400-E3/54's cathode is marked with a color band, confirming unidirectional polarity.
1.5KE400-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:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 324V
- Voltage - Breakdown (Min):
- 360V
- Voltage - Clamping (Max) @ Ipp:
- 574V
- Current - Peak Pulse (10/1000µs):
- 2.6A
- 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
1.5KE400-E3/54 FAQ
1.How can I place an order for 1.5KE400-E3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE400-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 1.5KE400-E3/54 reliable?
The price and inventory of 1.5KE400-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 1.5KE400-E3/54 is usually 5 days.
3.What payment methods are accepted for 1.5KE400-E3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE400-E3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE400-E3/54?
1.5KE400-E3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE400-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 1.5KE400-E3/54?
For technical support, including 1.5KE400-E3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE400-E3/54 requirements.
6.How does Aetrix verify that 1.5KE400-E3/54 is sourced from the original manufacturer or authorized distributors?
All 1.5KE400-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 1.5KE400-E3/54 meets industry standards.
7.What is the process for return or replacement of 1.5KE400-E3/54?
All 1.5KE400-E3/54 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE400-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 1.5KE400-E3/54 part is unused and in its original packaging.
Return procedure for 1.5KE400-E3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE400-E3/54 Tags
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