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Vishay General Semiconductor - Diodes Division 1.5KE540-E3/54
- Part No.:
- 1.5KE540-E3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE540-E3/54.pdf
- Description:
- TVS DIODE 437VWM 772VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:3,603
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Product details
Overview
1.5KE540-E3/54 from Vishay General Semiconductor is a unidirectional Transient Voltage Suppressor (TVS) diode designed for high-energy surge protection in power rails and signal lines. It features a 513 V to 567 V breakdown voltage (VBR), 459 V maximum standoff voltage (VWM), 740 V clamping voltage 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 is used to protect MOSFETs and ICs in industrial power supplies against lightning-induced transients.
For engineers reviewing the 1.5KE540-E3/54 datasheet, 1.5KE540-E3/54 pinout, 1.5KE540-E3/54 application, or 1.5KE540-E3/54 equivalent, this page delivers verified electrical parameters, thermal derating behavior, clamping performance under standardized surge waveforms, RoHS-compliant packaging details, and direct alternative part comparisons for robust circuit protection design.
Technical Context
This TVS diode employs a glass-passivated silicon junction optimized for fast response (<1 ns) and low incremental surge resistance. Its unidirectional polarity uses a cathode band marking and exhibits 3.5 V forward voltage only below 1.5KE220A - for 1.5KE540-E3/54, VF = 5.0 V at 100 A per specification note (3).
The device complies with JEDEC standards for transient suppression and is rated for 1500 W peak pulse power with 10/1000 µs waveform at 0.01% duty cycle. Thermal resistance is 15.4 °C/W (junction-to-lead) and 75 °C/W (junction-to-ambient), enabling reliable operation without forced cooling in typical PCB-mount applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 513 V / 567 V - defines minimum voltage at which clamping begins reliably; ensures protection starts before downstream component damage threshold. |
| VWM | 459 V - maximum continuous reverse operating voltage; must exceed system DC rail or signal swing to avoid leakage or conduction during normal operation. |
| VC @ IPPM | 740 V - clamped voltage at 2.03 A peak pulse; determines worst-case overvoltage seen by protected circuit during surge event. |
| PPPM | 1500 W - peak pulse power handling with 10/1000 µs waveform; supports high-energy transients like lightning surges on AC mains or long cables. |
| IPPM | 2.03 A - peak pulse current corresponding to VC; used with VC to calculate actual energy dissipation (E ≈ 0.5 × VC × IPPM × tp). |
| TJ max. | +175 °C - maximum junction temperature; enables use in high-ambient environments such as industrial motor drives or outdoor power converters. |
| RθJL | 15.4 °C/W - junction-to-lead thermal resistance; informs heatsinking requirements when mounting on copper pour or chassis. |
Pinout & Package
Package: Case Style 1.5KE - molded epoxy body with matte tin-plated leads, UL 94 V-0 rated, RoHS compliant (E3 suffix), 0.968 g unit weight, supplied in 13" paper tape and reel (1400 pcs per reel, package code 54).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connects to lower-potential side of protected circuit; conducts during positive surge on cathode side. |
| Cathode (marked with band) | Reverse-biased clamping terminal | Connected to higher-potential rail (e.g., VIN); avalanches into conduction when reverse voltage exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated chip junction | Enables stable, repeatable avalanche characteristics and long-term reliability under repetitive surge stress. |
| 1500 W peak pulse power (10/1000 µs) | Supports IEC 61000-4-5 Level 4 surge immunity testing (4 kV line-to-earth) without degradation. |
| Clamping response time <1 ns | Protects sensitive gate oxides in MOSFETs and input stages of op-amps before transient energy couples into silicon. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ESD or inductive switch-off), improving clamping precision. |
| RoHS-compliant E3 suffix | Meets JESD 201 Class 1A whisker test and J-STD-002 solderability standards for automated assembly. |
Applications
| AC Power Input Protection | MOSFET Gate Protection |
|---|---|
Use Scenario: Installed across AC mains input of industrial SMPS to suppress lightning-induced surges entering via utility lines. IC Role / Device Role / Timing Role: Unidirectional TVS placed between live/neutral and earth ground to clamp common-mode transients above 459 V. Use Value: Limits peak voltage to ≤740 V during 10/1000 µs surges, preventing rectifier bridge failure and capacitor overvoltage stress. | Use Scenario: Mounted directly across gate-source terminals of high-voltage N-channel MOSFETs in motor drive half-bridges. IC Role / Device Role / Timing Role: Fast-clamping TVS absorbs Miller-induced voltage spikes during high dV/dt switching transitions. Use Value: Prevents gate oxide rupture by clamping transients within 1 ns, maintaining safe VGS < ±20 V during 600 V bus switching. |
| Telecom Line Interface | Automotive Body Control Module |
Use Scenario: Applied on tip/ring lines of DSL or POTS interfaces exposed to induced surges from nearby power lines. IC Role / Device Role / Timing Role: Unidirectional TVS referenced to local ground, protecting line driver/receiver ICs from longitudinal surges. Use Value: Withstands 1500 W pulses while holding clamped voltage below 740 V, preserving signal integrity and IC latch-up immunity. | Use Scenario: Used on 12 V battery feed lines powering BCM microcontrollers and CAN transceivers in passenger vehicles. IC Role / Device Role / Timing Role: TVS placed between battery rail and ground to absorb load-dump transients (ISO 7637-2 Pulse 5a, up to 120 V/100 ms). Use Value: Handles 2.03 A peak current at 740 V clamping, limiting voltage excursion to protect 5 V LDOs and 3.3 V MCU I/Os. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ540A | 600 W rating (vs. 1500 W), DO-214AA package, 540 V VBR, 773 V VC @ 0.77 A | Limited to lower-energy surges; suitable for secondary-side or low-power signal line protection only. | Select when board space is constrained and surge threat level is ≤IEC 61000-4-5 Level 2. |
| 1N5388B | Zener diode (not TVS), 560 V VZ, 5 W power rating, no surge-rated clamping capability | Not intended for transient suppression; lacks fast response and pulse power rating. | Avoid for surge protection; only consider for steady-state overvoltage regulation where transients are absent. |
Compared with 1.5KE540-E3/54, SMBJ540A offers smaller footprint but sacrifices >60% peak pulse power handling and requires higher IPPM derating for equivalent clamping performance; 1N5388B is functionally incompatible due to absence of transient-rated avalanche structure and pulse power capability.
Availability
1.5KE540-E3/54 is available at Aetrix Electronics and suitable for industrial power supplies, automotive body control modules, telecom line interfaces, and AC-DC converter front-end protection requiring stable component supply and full traceability.
Supply support for 1.5KE540-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, MOSFETs, and protection devices with emphasis on reliability and ruggedness.
The 1.5KE series was engineered specifically for high-energy transient suppression in harsh environments, targeting industrial, automotive, and telecom infrastructure applications where sustained surge immunity is critical.
FAQ
What is the breakdown voltage range for the 1.5KE540-E3/54?
The 1.5KE540-E3/54 has a specified breakdown voltage (VBR) range of 513 V minimum to 567 V maximum at 1.0 mA test current. This range ensures consistent clamping onset across production lots and allows designers to select appropriate margin relative to system operating voltage. The value is measured per JEDEC standard and confirmed in Vishay's 88301 datasheet revision 09-Aug-2022. For 1.5KE540-E3/54, VBR is guaranteed within this window under TA = 25 °C conditions.
Does the 1.5KE540-E3/54 have AEC-Q101 qualification?
No, the 1.5KE540-E3/54 is a commercial-grade device and is not AEC-Q101 qualified. Per Vishay documentation, AEC-Q101 qualification applies only to 1.5KE6.8AHE3_B through 1.5KE220AHE3_B and their bidirectional counterparts. The 1.5KE250A to 1.5KE540A family-including 1.5KE540-E3/54-is explicitly designated as commercial grade only. For automotive applications requiring AEC-Q101, alternate part numbers with HE3 suffix and appropriate voltage rating must be selected.
What is the clamping voltage of the 1.5KE540-E3/54 at its rated peak pulse current?
The 1.5KE540-E3/54 has a maximum clamping voltage (VC) of 740 V at its rated peak pulse current (IPPM) of 2.03 A, tested with a 10/1000 µs waveform. This value represents the worst-case voltage imposed on the protected circuit during a full-rated surge event. It is derived directly from the "ELECTRICAL CHARACTERISTICS" table in Vishay document 88301 and is critical for verifying that downstream components remain within absolute maximum ratings during transient conditions. The 1.5KE540-E3/54 maintains this clamping performance across its operational temperature range.
Can the 1.5KE540-E3/54 be used in bidirectional configurations?
No, the 1.5KE540-E3/54 is a unidirectional TVS diode and cannot be used in bidirectional configurations. Bidirectional variants in the 1.5KE family are designated with a "CA" suffix (e.g., 1.5KE220CA) and are only available up to 1.5KE220CA per Vishay's datasheet note. The 1.5KE540A series is unidirectional only, with polarity indicated by a cathode band. Attempting to use 1.5KE540-E3/54 for bidirectional protection would result in forward conduction during negative transients, causing failure or short-circuit behavior.
What is the thermal resistance junction-to-lead for the 1.5KE540-E3/54?
The 1.5KE540-E3/54 has a typical thermal resistance junction-to-lead (RθJL) of 15.4 °C/W, as specified in the "THERMAL CHARACTERISTICS" section of Vishay document 88301. This parameter reflects heat transfer efficiency from the silicon die to the lead frame under standard mounting conditions (0.375" lead length). It is essential for estimating junction temperature rise during repetitive surge events or elevated ambient conditions. When designing PCB layouts for 1.5KE540-E3/54, adequate copper pour on both anode and cathode pads improves thermal dissipation and helps maintain RθJL near its typical value.
1.5KE540-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):
- 437V
- Voltage - Breakdown (Min):
- 486V
- Voltage - Clamping (Max) @ Ipp:
- 772V
- Current - Peak Pulse (10/1000µs):
- 1.94A
- 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
1.5KE540-E3/54 FAQ
1.How can I place an order for 1.5KE540-E3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE540-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 1.5KE540-E3/54 reliable?
The price and inventory of 1.5KE540-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 1.5KE540-E3/54 is usually 5 days.
3.What payment methods are accepted for 1.5KE540-E3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE540-E3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE540-E3/54?
1.5KE540-E3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE540-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 1.5KE540-E3/54?
For technical support, including 1.5KE540-E3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE540-E3/54 requirements.
6.How does Aetrix verify that 1.5KE540-E3/54 is sourced from the original manufacturer or authorized distributors?
All 1.5KE540-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 1.5KE540-E3/54 meets industry standards.
7.What is the process for return or replacement of 1.5KE540-E3/54?
All 1.5KE540-E3/54 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE540-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 1.5KE540-E3/54 part is unused and in its original packaging.
Return procedure for 1.5KE540-E3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE540-E3/54 Tags
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