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Vishay General Semiconductor - Diodes Division 1.5KE400-E3/73
- Part No.:
- 1.5KE400-E3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE400-E3/73.pdf
- Description:
- TVS DIODE 324VWM 574VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:3,320
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Product details
Overview
1.5KE400-E3/73 from Vishay General Semiconductor is a unidirectional Transient Voltage Suppressor (TVS) diode designed for high-energy surge protection in DC power lines and signal paths. It features a 380 V to 420 V breakdown voltage (VBR), 342 V maximum standoff 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 range - deployed in industrial motor drives and telecom power supplies.
For engineers reviewing the 1.5KE400-E3/73 datasheet, 1.5KE400-E3/73 pinout, 1.5KE400-E3/73 application, or 1.5KE400-E3/73 equivalent, this page delivers verified electrical parameters, thermal derating behavior, clamping performance under standardized transients, RoHS-compliant packaging details, and direct alternative part comparisons for ESD and lightning surge protection design validation.
Technical Context
This unidirectional TVS diode uses a glass-passivated silicon junction optimized for fast response (<1 ns) and low incremental surge resistance. Its 1500 W peak pulse rating is defined per 10/1000 µs waveform with 0.01% duty cycle, and it exhibits a temperature coefficient of VBR of +0.110 %/°C - critical for stable clamping across wide ambient ranges.
The device supports 200 A non-repetitive forward surge current (IFSM, 8.3 ms half-sine), dissipates 6.5 W on infinite heatsink at TL = 75 °C, and maintains <1 µA reverse leakage at VWM. Its RθJA = 75 °C/W and RθJL = 15.4 °C/W define thermal limits for PCB layout and heatsinking decisions.
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 transient, defining protected circuit's worst-case overvoltage |
| PPPM | 1500 W - peak surge energy absorption capability under standardized lightning-like impulse |
| IFSM | 200 A - withstands single 8.3 ms half-sine surge without degradation, critical for AC line input stages |
| TJ Range | -55 °C to +175 °C - enables use in under-hood automotive, industrial enclosures, 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 |
Pinout & Package
1.5KE400-E3/73 is housed in a DO-201AD (Case Style 1.5KE) axial-leaded package. The cathode is marked by a color band on the body; anode is unmarked. Leads are matte tin-plated and compliant with J-STD-002 and JESD 22-B102 solderability standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unmarked end) | Current entry point in forward bias; connected to system ground or low-side reference | Provides low-impedance path to ground during transient events when cathode is held at higher potential |
| Cathode (banded end) | Protected line connection; reverse-biased during normal operation | Connected to the line being protected (e.g., +48 V telecom rail); conducts only when VLINE exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated chip junction | Enables stable VBR tolerance and long-term reliability under thermal cycling and humidity stress |
| 1500 W peak pulse power (10/1000 µs) | Meets IEC 61000-4-5 Level 4 surge immunity requirements for industrial and telecom ports |
| Clamping voltage ≤548 V at 2.7 A | Ensures downstream ICs rated for 600 V bus isolation remain within safe operating area during transients |
| Response time <1 ns | Acts before sensitive MOSFETs or controllers experience voltage overshoot beyond breakdown limits |
| RoHS-compliant, commercial grade (E3 suffix) | Meets environmental compliance for global production without lead-free reflow compatibility concerns |
Applications
| Industrial Motor Drives | Telecom Power Supplies |
|---|---|
Use Scenario: Protection of 400 V DC bus against switching transients from IGBT turn-off and regenerative braking. IC Role / Device Role / Timing Role: Unidirectional TVS placed between DC+ and chassis ground to clamp positive-going surges. Use Value: Limits transient overvoltage to ≤548 V, preventing gate oxide rupture in 600 V-rated IGBT drivers and maintaining system uptime. | Use Scenario: Input stage protection on -48 V telecom rectifier outputs exposed to lightning-induced surges on copper distribution lines. IC Role / Device Role / Timing Role: Cathode tied to -48 V rail, anode to ground - suppresses negative transients exceeding 342 V reverse standoff. Use Value: Withstands 1500 W pulses without degradation, meeting Telcordia GR-1089-CORE Level 3 surge requirements. |
| 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 Pulse 5a transients. IC Role / Device Role / Timing Role: Mounted at connector interface; cathode to LIN line, anode to vehicle ground. Use Value: Sub-1 ns response prevents data corruption during 100 V/50 ms load dump events, preserving communication integrity. | Use Scenario: DC-link surge suppression in solar string inverters where PV arrays induce high-voltage transients during partial shading or fault clearing. IC Role / Device Role / Timing Role: Connected across 600–1000 V DC-link capacitors to clamp fast-rising transients from grid switching. Use Value: 175 °C max junction temperature allows placement near heat-generating power stages without derating penalties. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ400A | DO-214AA package; lower PPPM = 600 W; VC = 548 V at 1.1 A; RθJA = 110 °C/W | Surface-mount solution for space-constrained PCBs; unsuitable for >1 kV surge testing due to lower power rating | Select SMBJ400A only when board area is limited and surge threat level is ≤Level 3 per IEC 61000-4-5 |
| 1.5KE400AHE3_B | Same 1.5KE package and electrical specs; AEC-Q101 qualified; HE3 suffix denotes whisker-tested leads | Required for automotive under-hood applications where qualification to AEC-Q101 is mandatory | Choose 1.5KE400AHE3_B for automotive OEM designs; 1.5KE400-E3/73 remains optimal for industrial/commercial use |
Compared with SMBJ400A, 1.55KE400-E3/73 delivers 2.5× higher surge power handling and superior thermal dissipation in through-hole layouts; versus 1.5KE400AHE3_B, it lacks AEC-Q101 qualification but offers identical clamping and cost advantage for non-automotive systems.
Availability
1.5KE400-E3/73 is available at Aetrix Electronics and suitable for industrial motor drives, telecom power supplies, renewable energy inverters, and automotive body control modules requiring stable component supply across multi-year production cycles.
Supply support for 1.5KE400-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, and protection devices with emphasis on reliability and ruggedness.
The 1.5KE series was engineered for high-energy transient suppression in harsh environments - targeting industrial automation, telecom infrastructure, and transportation systems where failure resilience is non-negotiable.
FAQ
What is the clamping voltage of the 1.5KE400-E3/73 under a 10/1000 µs surge?
The 1.5KE400-E3/73 clamps to a maximum of 548 V when subjected to its rated peak pulse current of 2.7 A under the standard 10/1000 µs waveform. This value is measured per JEDEC test conditions and defines the upper voltage limit imposed on protected circuitry during transient events - critical for ensuring downstream components remain within their absolute maximum ratings.
Is the 1.5KE400-E3/73 RoHS compliant and lead-free compatible?
Yes, the 1.5KE400-E3/73 carries the E3 suffix, indicating full RoHS compliance and qualification to JESD 201 Class 1A whisker testing. Its matte tin-plated leads are solderable using standard lead-free reflow profiles up to 260 °C, and the device meets JEDEC MSL-1 handling requirements without moisture sensitivity limitations.
Can the 1.5KE400-E3/73 be used in bidirectional configurations?
No, the 1.5KE400-E3/73 is a unidirectional TVS diode. Bidirectional variants in the 1.5KE family are designated with a "CA" suffix (e.g., 1.5KE220CA) and are only available up to 220 V VBR; the 400 V rating is unidirectional-only per Vishay's datasheet specification table and mechanical notes.
What is the maximum operating temperature for the 1.5KE400-E3/73?
The 1.5KE400-E3/73 has a maximum junction temperature (TJ) of +175 °C and a storage temperature range of -55 °C to +175 °C. Its thermal resistance values - RθJA = 75 °C/W and RθJL = 15.4 °C/W - allow accurate thermal modeling for PCB layout and heatsink sizing in high-ambient environments like industrial enclosures or outdoor telecom cabinets.
How does the 1.5KE400-E3/73 compare to the 1.5KE400A in terms of packaging and marking?
The 1.5KE400-E3/73 and 1.5KE400A share identical Case Style 1.5KE (DO-201AD) packaging, electrical specifications, and cathode band marking. The "E3/73" suffix indicates RoHS-compliant packaging in 73" tape-and-reel format (1400 pcs/reel), whereas "1.5KE400A" is the base part number without packaging or compliance designation - both refer to the same die and construction.
1.5KE400-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:
- 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-E3/73 FAQ
1.How can I place an order for 1.5KE400-E3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE400-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 1.5KE400-E3/73 reliable?
The price and inventory of 1.5KE400-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 1.5KE400-E3/73 is usually 5 days.
3.What payment methods are accepted for 1.5KE400-E3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE400-E3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE400-E3/73?
1.5KE400-E3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE400-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 1.5KE400-E3/73?
For technical support, including 1.5KE400-E3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE400-E3/73 requirements.
6.How does Aetrix verify that 1.5KE400-E3/73 is sourced from the original manufacturer or authorized distributors?
All 1.5KE400-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 1.5KE400-E3/73 meets industry standards.
7.What is the process for return or replacement of 1.5KE400-E3/73?
All 1.5KE400-E3/73 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE400-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 1.5KE400-E3/73 part is unused and in its original packaging.
Return procedure for 1.5KE400-E3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE400-E3/73 Tags
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