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Vishay General Semiconductor - Diodes Division 1.5KE540A-E3/51
- Part No.:
- 1.5KE540A-E3/51
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE540A-E3/51.pdf
- Description:
- TVS DIODE 459VWM 740VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:6,454
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Product details
Overview
1.5KE540A-E3/51 from Vishay General Semiconductor is a unidirectional Transient Voltage Suppressor (TVS) diode designed for high-energy surge protection in power rails and interface lines. It features a 513 V to 567 V breakdown voltage (VBR), 459 V maximum working voltage (VWM), 740 V clamping voltage (VC) at 2.03 A peak pulse current, 1500 W peak pulse power (10/1000 µs), and operates across -55 °C to +175 °C junction temperature. It protects MOSFETs and ICs in industrial power supplies against lightning-induced transients.
For engineers reviewing the 1.5KE540A-E3/51 datasheet, 1.5KE540A-E3/51 pinout, 1.5KE540A-E3/51 application, or 1.5KE540A-E3/51 equivalent, this page delivers verified electrical parameters, JEDEC 1.5KE package details, clamping behavior under surge conditions, thermal derating curves, and direct alternatives for overvoltage protection design validation.
Technical Context
This unidirectional TVS diode uses a glass-passivated silicon junction optimized for fast transient response (<1 ns) and low incremental surge resistance. Its 1500 W peak pulse power rating is defined per 10/1000 µs waveform with 0.01% duty cycle, and it maintains stable clamping up to TJ = 175 °C with thermal resistance RθJA = 75 °C/W.
The device exhibits a 0.110 %/°C temperature coefficient of VBR, ensuring predictable voltage threshold drift over temperature. Forward voltage is rated at 5.0 V at 100 A, consistent with all 1.5KE250A and above variants, and it supports soldering per J-STD-002 with matte tin-plated leads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 513 V / 567 V - precise breakdown threshold ensures reliable triggering before downstream component damage |
| VWM | 459 V - maximum continuous reverse operating voltage compatible with 400–480 VAC rectified rails |
| VC @ IPPM | 740 V - clamping voltage limits transient energy delivered to protected circuit during 2.03 A surge |
| PPPM | 1500 W - peak pulse power handling for 10/1000 µs surges, enabling robust lightning and EFT protection |
| IPPM | 2.03 A - peak pulse current derived from VC and PPPM; defines surge current capability at clamping |
| TJ max. | +175 °C - high junction temperature rating supports operation in enclosed industrial enclosures or near heat sources |
| RθJA | 75 °C/W - thermal resistance informs heatsinking requirements when operating near PD = 6.5 W limit |
Pinout & Package
Package: JEDEC DO-201AD (Case Style 1.5KE), molded epoxy body with matte tin-plated axial leads; RoHS-compliant, commercial grade (E3 suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., ground or return path) in unidirectional configuration |
| Cathode | Reverse-biased clamping terminal | Marked with color band; connects to protected line (e.g., DC bus or signal rail) to clamp positive transients |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Enables stable long-term reliability and low leakage (<1 µA at VWM) under harsh environmental stress |
| 1500 W peak pulse power (10/1000 µs) | Supports IEC 61000-4-5 Level 4 (4 kV line-to-line) surge immunity without external series impedance |
| Clamping response time <1 ns | Acts before sensitive gate oxides or logic inputs experience destructive overvoltage stress |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (e.g., ESD or switching spikes) |
| RoHS-compliant E3 suffix | Meets JESD 201 Class 1A whisker test and J-STD-002 solderability standards for high-reliability assembly |
Applications
| Industrial AC/DC Power Supply Input Protection | Telecom Line Card Surge Protection |
|---|---|
Use Scenario: Protects rectified 380–480 VDC bus in DIN-rail power supplies against lightning-induced surges on AC mains input. IC Role / Device Role / Timing Role: Unidirectional TVS placed across bulk capacitor to clamp positive transients before they reach PWM controller or MOSFETs. Use Value: With VWM = 459 V and VC = 740 V, it avoids conduction during normal operation while limiting surge voltage to safe levels for 600 V-rated MOSFETs. |
Use Scenario: Shields Ethernet PHY interfaces and PoE injectors on telecom central office line cards exposed to induced surges on copper pairs. IC Role / Device Role / Timing Role: Mounted at line entry point to absorb common-mode surges per ITU-T K.20/K.44, coordinated with GDTs and common-mode chokes. Use Value: 1500 W rating enables single-device compliance with GR-1089-CORE Level 3 (10/700 µs, 4 kV) without parallel staging. |
| Automotive On-Board Charger (OBC) DC Link Protection | Renewable Energy Inverter DC Bus Clamping |
Use Scenario: Safeguards bidirectional OBC inverters during regenerative braking events that induce voltage spikes on the high-voltage DC link. IC Role / Device Role / Timing Role: Connected anode-to-ground, cathode-to-DC+ to suppress positive transients exceeding battery voltage by >100 V. Use Value: TJ max. = +175 °C and 0.110 %/°C VBR TC ensure stable clamping performance in under-hood thermal environments. |
Use Scenario: Clamps switching transients on 600–1000 VDC photovoltaic string outputs feeding central inverters in solar farms. IC Role / Device Role / Timing Role: Placed across DC+ and DC− terminals to protect IGBT gate drivers and isolation amplifiers from dV/dt-induced coupling. Use Value: 740 V clamping voltage provides margin below 1200 V IGBT blocking rating, reducing risk of avalanche failure during grid faults. |
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, 540 V VBR, 773 V VC @ 1.95 A, 400 W PPPM | Lower power rating requires parallel devices for 1500 W compliance; smaller footprint but higher thermal resistance | Select when board space is constrained and surge energy is limited to IEC 61000-4-5 Level 2 |
| ON Semiconductor 1N5388B | DO-201AD package, 560 V VBR, 810 V VC @ 1.85 A, 1500 W PPPM, but only 5 W PD and no AEC-Q101 option | Higher VC reduces protection margin; not qualified for automotive use despite same package | Use where cost sensitivity outweighs clamping voltage optimization and automotive qualification is unnecessary |
Compared with 1.5KE540A-E3/51, SMAJ540A offers compact size but sacrifices surge capacity and thermal performance, while 1N5388B matches power rating but degrades protection margin and lacks automotive qualification-making 1.5KE540A-E3/51 optimal for high-reliability industrial and transportation systems requiring validated 1500 W clamping with low VC.
Availability
1.5KE540A-E3/51 is available at Aetrix Electronics and suitable for industrial power supplies, telecom infrastructure equipment, renewable energy inverters, and automotive on-board chargers requiring stable component supply and long-term manufacturability.
Supply support for 1.5KE540A-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, MOSFETs, optoelectronics, and passive components with emphasis on reliability, precision, and high-power handling.
The 1.5KE series was engineered specifically for high-energy transient suppression in industrial, telecom, and transportation systems where robustness, repeatable clamping, and wide temperature operation are mandatory.
FAQ
What is the breakdown voltage range for the 1.5KE540A-E3/51?
The 1.5KE540A-E3/51 has a guaranteed breakdown voltage (VBR) range of 513 V minimum to 567 V maximum at 1.0 mA test current, measured per JEDEC standard. This tight tolerance ensures consistent triggering behavior across production lots and supports reliable coordination with downstream overvoltage protection circuits in high-voltage DC systems.
Is the 1.5KE540A-E3/51 suitable for automotive applications?
No-the 1.5KE540A-E3/51 is commercial grade only, as explicitly noted in the Vishay datasheet. Devices marked with HE3 suffix (e.g., 1.5KE540AHE3_B) are AEC-Q101 qualified; the E3/51 variant lacks automotive qualification and is intended for industrial, telecom, and renewable energy applications where extended temperature operation is required but automotive reliability testing is not mandated.
What is the clamping voltage of the 1.5KE540A-E3/51 under surge conditions?
The 1.5KE540A-E3/51 clamps to a maximum of 740 V at its rated peak pulse current of 2.03 A, defined using the standardized 10/1000 µs double-exponential waveform. This VC value is critical for ensuring protected components-such as 600 V or 650 V MOSFETs-remain within safe operating area during surge events without avalanche breakdown.
Does the 1.5KE540A-E3/51 have bidirectional capability?
No-the 1.5KE540A-E3/51 is strictly unidirectional. Bidirectional variants in the 1.5KE family are only available up to 1.5KE220CA; the 540 V rating is unidirectional-only, as confirmed in the "Notes" section of the Vishay datasheet (Document Number: 88301). Using it in bidirectional configurations would result in forward conduction during negative transients and potential failure.
What package type does the 1.5KE540A-E3/51 use, and what are its key mechanical properties?
The 1.5KE540A-E3/51 uses the JEDEC DO-201AD package (Case Style 1.5KE), featuring a molded epoxy body meeting UL 94 V-0 flammability rating, axial matte tin-plated leads compliant with J-STD-002, and solder dip tolerance up to 275 °C for 10 seconds. Its dimensions are 5.3 mm diameter × 9.5 mm lead length, optimized for through-hole mounting in high-surge industrial PCBs.
1.5KE540A-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:
- 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-E3/51 FAQ
1.How can I place an order for 1.5KE540A-E3/51 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE540A-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 1.5KE540A-E3/51 reliable?
The price and inventory of 1.5KE540A-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 1.5KE540A-E3/51 is usually 5 days.
3.What payment methods are accepted for 1.5KE540A-E3/51?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE540A-E3/51 transactions.
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Once your 1.5KE540A-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 1.5KE540A-E3/51?
For technical support, including 1.5KE540A-E3/51 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE540A-E3/51 requirements.
6.How does Aetrix verify that 1.5KE540A-E3/51 is sourced from the original manufacturer or authorized distributors?
All 1.5KE540A-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 1.5KE540A-E3/51 meets industry standards.
7.What is the process for return or replacement of 1.5KE540A-E3/51?
All 1.5KE540A-E3/51 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE540A-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 1.5KE540A-E3/51 part is unused and in its original packaging.
Return procedure for 1.5KE540A-E3/51:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE540A-E3/51 Tags
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