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Vishay General Semiconductor - Diodes Division 1.5KE540A-E3/54
- Part No.:
- 1.5KE540A-E3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE540A-E3/54.pdf
- Description:
- TVS DIODE 459VWM 740VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:7,975
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Product details
Overview
1.5KE540A-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 513 V to 567 V breakdown voltage (VBR), 459 V maximum working voltage (VWM), 1500 W peak pulse power (10/1000 µs), 2.03 A peak pulse current (IPPM), and clamps transients to ≤740 V at rated surge. It is used in industrial power supplies and telecom line interfaces where overvoltage events exceed 400 V.
For engineers reviewing the 1.5KE540A-E3/54 datasheet, 1.5KE540A-E3/54 pinout, 1.5KE540A-E3/54 application, or 1.5KE540A-E3/54 equivalent, this part delivers verified 1500 W transient suppression with low leakage (<1 µA at VWM), glass-passivated junction reliability, and RoHS-compliant matte tin leads - critical for high-voltage DC bus protection in harsh environments.
Technical Context
This unidirectional TVS diode operates as a voltage-clamping device that enters avalanche conduction when reverse voltage exceeds its specified VBR range (513–567 V). Its clamping voltage (VC) is guaranteed ≤740 V at IPPM = 2.03 A under 10/1000 µs waveform, ensuring downstream ICs remain below absolute maximum ratings during lightning-induced surges.
It exhibits a temperature coefficient of VBR of +0.110 %/°C, enabling predictable voltage drift across its operating junction temperature range (−55 °C to +175 °C), and maintains <1 µA reverse leakage at VWM = 459 V - essential for low-power standby circuits and high-impedance sensing nodes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 513 V / 567 V - defines the minimum and maximum voltage at which the device reliably enters avalanche conduction at 1 mA test current |
| VWM | 459 V - maximum continuous reverse operating voltage before significant leakage begins; sets safe DC rail margin |
| VC @ IPPM | ≤740 V - clamped voltage during 2.03 A 10/1000 µs surge; determines protected circuit's worst-case overvoltage exposure |
| PPPM | 1500 W - peak transient power handling capability; enables robust protection against lightning and inductive switching events |
| IPPM | 2.03 A - peak surge current supported at VC; directly correlates to energy absorption (E ≈ VC × IPPM × t) |
| TJ max. | +175 °C - maximum junction temperature; supports operation in sealed enclosures or high-ambient industrial settings |
| RθJA | 75 °C/W - thermal resistance from junction to ambient; informs heatsinking requirements for repetitive surge duty |
Pinout & Package
Package: DO-201AD (Case Style 1.5KE), axial-leaded, molded epoxy body with UL 94 V-0 flammability rating. Matte tin-plated leads meet J-STD-002 solderability and JESD 201 Class 1A whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse surge return path | Connected to system ground or low-side reference; polarity must be observed for unidirectional operation |
| Cathode | Reverse-biased terminal / Clamping node | Connected to protected line (e.g., +48 V telecom rail); color band identifies cathode end per JEDEC standard |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR tolerance 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-earth) in properly filtered systems |
| Clamping ratio (VC/VBR) ≤1.45 | Minimizes overvoltage overshoot during fast transients - critical for protecting 600 V-rated MOSFETs and rectifiers |
| Low incremental surge resistance | Reduces voltage rise during high-di/dt events, improving clamping fidelity for sub-microsecond spikes |
| RoHS-compliant E3 suffix | Meets global environmental compliance without sacrificing surge performance or lead finish reliability |
Applications
| Industrial AC/DC Power Supply Input Stage | Telecom -48 V DC Distribution Line |
|---|---|
Use Scenario: Protecting bridge rectifier inputs and bulk capacitor charging circuits from lightning-induced surges on 3-phase mains feeds. IC Role / Device Role / Timing Role: Primary overvoltage clamp placed between L/N and earth, absorbing >1 kV ring waves and 10/1000 µs surges. Use Value: Prevents catastrophic failure of 600 V IGBTs and electrolytic capacitors by limiting transient voltage to ≤740 V at full 1500 W rating. |
Use Scenario: Safeguarding -48 V DC distribution boards in central office equipment exposed to induced surges from nearby power lines. IC Role / Device Role / Timing Role: Unidirectional shunt protector on the negative rail, referenced to system ground, responding in <1 ns. Use Value: Maintains <1 µA leakage at 459 V stand-off, preserving battery backup runtime while clamping 2.03 A surges to ≤740 V. |
| High-Voltage Motor Drive DC Bus | Renewable Energy Inverter DC Link |
Use Scenario: Suppressing commutation spikes on 400–600 V DC bus segments feeding 3-phase inverters in HVAC and pump drives. IC Role / Device Role / Timing Role: Fast-acting clamp parallel to bus capacitors, triggered only during overvoltage excursions beyond 513 V. Use Value: Enables use of lower-voltage-rated (600 V) IGBT modules by constraining transient overshoot within safe SOA limits. |
Use Scenario: Protecting photovoltaic string combiner boxes and MPPT controller inputs from grid-coupled surge coupling and solar array transients. IC Role / Device Role / Timing Role: Standoff-rated TVS on DC input terminals, selected for 459 V VWM to accommodate PV open-circuit voltage derating. Use Value: Survives repeated 1500 W surges without parameter shift, validated per IEC 61643-31 for renewable energy applications. |
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 SMAJ540A | DO-214AC (SMA) package; 5% VBR tolerance vs. 513–567 V (10%); lower PPPM = 400 W | Lower power rating suits low-energy signal lines, not 1500 W DC bus protection | Select only for space-constrained PCBs where 400 W suffices and axial leads are impractical |
| ON Semiconductor 1N6299A | Same DO-201AD package; VBR = 143–158 V; VWM = 128 V; VC = 207 V - targets mid-voltage rails | Designed for 100–200 V systems (e.g., automotive 48 V, industrial 120 V AC control), not 450+ V rails | Use when protecting 150 V nominal circuits; not interchangeable with 1.5KE540A-E3/54 due to 3× lower VWM |
Compared with 1.5KE540A-E3/54, SMAJ540A offers surface-mount compatibility but sacrifices 73% peak power handling, while 1N6299A serves entirely different voltage classes - making 1.5KE540A-E3/54 uniquely suited for ≥450 V DC protection where axial lead robustness and 1500 W capability are mandatory.
Availability
1.5KE540A-E3/54 is available at Aetrix Electronics and suitable for industrial power supplies, telecom infrastructure, motor drive DC buses, and renewable energy inverters requiring stable component supply and long-lifecycle support.
Supply support for 1.5KE540A-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 high-reliability diodes, MOSFETs, and passive components for demanding industrial and automotive applications.
The 1.5KE series was engineered specifically for high-energy transient suppression in mains-connected and high-voltage DC systems, emphasizing ruggedness, repeatable clamping, and long-term stability under thermal stress.
FAQ
What is the breakdown voltage tolerance of 1.5KE540A-E3/54?
The 1.5KE540A-E3/54 has a specified breakdown voltage range of 513 V to 567 V at 1 mA test current, representing a ±10% tolerance around the nominal 540 V rating. This wide tolerance is inherent to high-voltage avalanche diodes and is fully characterized in the Vishay datasheet (Document Number: 88301, Rev. 09-Aug-2022). Designers must use the min/max values - not the nominal - for worst-case clamping analysis in the 1.5KE540A-E3/54 application.
Is 1.5KE540A-E3/54 bidirectional or unidirectional?
The 1.5KE540A-E3/54 is a unidirectional Transient Voltage Suppressor, indicated by the "A" suffix (as opposed to "CA" for bidirectional variants). It conducts in forward bias like a standard diode and clamps only in reverse bias above VBR. Bidirectional versions (e.g., 1.5KE220CA) exist only up to 220 V; 1.5KE540A-E3/54 is unidirectional only, with polarity marked by a cathode band on the DO-201AD package.
What is the maximum clamping voltage for 1.5KE540A-E3/54 at its rated surge current?
The maximum clamping voltage (VC) for 1.5KE540A-E3/54 is 740 V, measured at its peak pulse current (IPPM) of 2.03 A under the standardized 10/1000 µs waveform. This value is guaranteed across temperature and production lot, and appears in Table 1 of the Vishay datasheet (88301). It defines the upper voltage limit imposed on protected circuitry during worst-case surge events involving the 1.5KE540A-E3/54.
Can 1.5KE540A-E3/54 be used in AEC-Q101 qualified designs?
No - the 1.5KE540A-E3/54 is a commercial-grade device. Per the Vishay datasheet (page 2, note), "1.5KE250A to 1.5KE540A are commercial grade only." AEC-Q101 qualification applies only to variants with the "HE3" suffix (e.g., 1.5KE220AHE3_B) and is limited to devices up to 220 V. For automotive applications requiring 540 V standoff, alternative qualification pathways or higher-voltage qualified parts outside the 1.5KE family must be evaluated.
What is the thermal resistance and power derating behavior of 1.5KE540A-E3/54?
The 1.5KE540A-E3/54 has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W and a junction-to-lead (RθJL) of 15.4 °C/W. Its steady-state power dissipation (PD) is rated at 6.5 W at TL = 75 °C, derating linearly to zero at 175 °C. Surge power (1500 W) is non-repetitive; for repetitive surges, duty cycle and ambient temperature must follow Fig. 2 in the datasheet to avoid thermal runaway in the 1.5KE540A-E3/54.
1.5KE540A-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:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 459V
- Voltage - Breakdown (Min):
- 513V
- Voltage - Clamping (Max) @ Ipp:
- 740V
- Current - Peak Pulse (10/1000µs):
- 2.03A
- 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
1.5KE540A-E3/54 FAQ
1.How can I place an order for 1.5KE540A-E3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE540A-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 1.5KE540A-E3/54 reliable?
The price and inventory of 1.5KE540A-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 1.5KE540A-E3/54 is usually 5 days.
3.What payment methods are accepted for 1.5KE540A-E3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE540A-E3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE540A-E3/54?
1.5KE540A-E3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE540A-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 1.5KE540A-E3/54?
For technical support, including 1.5KE540A-E3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE540A-E3/54 requirements.
6.How does Aetrix verify that 1.5KE540A-E3/54 is sourced from the original manufacturer or authorized distributors?
All 1.5KE540A-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 1.5KE540A-E3/54 meets industry standards.
7.What is the process for return or replacement of 1.5KE540A-E3/54?
All 1.5KE540A-E3/54 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE540A-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 1.5KE540A-E3/54 part is unused and in its original packaging.
Return procedure for 1.5KE540A-E3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE540A-E3/54 Tags
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