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Vishay General Semiconductor - Diodes Division LCE15-E3/54
- Part No.:
- LCE15-E3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
LCE15-E3/54.pdf
- Description:
- TVS DIODE 15VWM 26.9VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:3,386
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Product details
Overview
LCE15-E3/54 from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode designed for robust overvoltage protection of sensitive electronics. It features a 15 V standoff voltage (VWM), 16.7–18.5 V breakdown range (VBR), 1500 W peak pulse power (10/1000 µs), 24.4 V maximum clamping voltage at 61 A, and operates across –65 °C to +175 °C junction temperature. It is used in DC power rail and signal line protection against inductive switching transients and ESD in industrial sensor interfaces.
For engineers reviewing the LCE15-E3/54 datasheet, LCE15-E3/54 pinout, LCE15-E3/54 application, or LCE15-E3/54 equivalent, key selection criteria include its 15 V working voltage, 24.4 V clamping performance at 61 A IPPM, unidirectional polarity, 1.5KE package compatibility, and UL 497B listing for telecom surge protection.
Technical Context
The LCE15-E3/54 employs a glass-passivated silicon junction for stable avalanche behavior under repetitive surge conditions. Its 10/1000 µs waveform rating supports high-energy transient suppression without thermal runaway, with derating applied above 25 °C ambient per the published power derating curve.
Designed for unidirectional DC protection, it exhibits low incremental surge resistance and fast response time (<1 ns), enabling effective clamping before downstream ICs experience overstress. The device meets JESD22-B106 solderability (275 °C, 10 s) and JESD201 Class 1A whisker resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 15.0 V - Maximum continuous reverse operating voltage before conduction begins; sets safe DC bias margin for protected line. |
| VBR (min/max) | 16.7 V / 18.5 V - Breakdown occurs within this range at 1 mA test current; defines guaranteed turn-on threshold under surge. |
| VC @ IPPM | 24.4 V at 61 A - Clamped voltage during 10/1000 µs surge; determines maximum stress seen by downstream circuitry. |
| PPPM | 1500 W - Peak pulse power handling capability; enables protection against high-energy transients like lightning-induced surges. |
| Junction Temp Range | –65 °C to +175 °C - Supports operation in harsh environments including automotive under-hood and industrial motor control enclosures. |
| Package | 1.5KE - Industry-standard axial-leaded package with 0.375" lead spacing; compatible with legacy through-hole PCB layouts and automated insertion. |
| RoHS Status | E3 suffix - Compliant with RoHS Directive 2011/65/EU and JESD201 Class 1A whisker testing; suitable for commercial-grade production. |
Pinout & Package
Package: 1.5KE molded epoxy case with matte tin-plated leads; polarity indicated by cathode band; UL 94 V-0 rated molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection point | Connected to ground or lower-potential node; completes conduction path during reverse-biased surge event. |
| Cathode | High-side connection point | Connected to protected line (e.g., 15 V rail); blocks normal operation but avalanches during overvoltage. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable, repeatable avalanche characteristics over lifetime and temperature; eliminates surface leakage drift. |
| 1500 W peak pulse power (10/1000 µs) | Withstands high-energy transients common in industrial motor drives and relay coil snubbing without degradation. |
| UL 497B listed | Qualified for telecom interface protection per UL standard; simplifies system-level safety certification. |
| Low clamping ratio (VC/VBR ≈ 1.4) | Minimizes overvoltage overshoot during clamping-critical for protecting 16 V-rated MOSFET gates and logic inputs. |
| 100 pF junction capacitance | Enables use on moderate-speed signal lines (e.g., RS-485, CAN) without significant bandwidth degradation. |
Applications
| Industrial Sensor Interface | DC Power Rail Protection |
|---|---|
Use Scenario: Protecting analog output lines (e.g., 4–20 mA transmitters) from inductive kickback in factory automation systems. IC Role / Device Role / Timing Role: Unidirectional TVS placed between signal line and ground to clamp transients before they reach precision DAC or op-amp output stages. Use Value: Prevents latch-up or permanent damage to 16-bit DACs and instrumentation amplifiers exposed to 1 kV/µs transients from nearby solenoid switching. |
Use Scenario: Safeguarding 15 V supply rails feeding microcontrollers and communication ICs in programmable logic controllers (PLCs). IC Role / Device Role / Timing Role: Primary overvoltage clamp on input bulk capacitor feed, absorbing energy from hot-swap events or load-dump spikes. Use Value: Limits rail excursion to ≤24.4 V during 61 A surge, maintaining MCU reset integrity and avoiding brown-out resets or flash corruption. |
| Telecom Line Interface | MOSFET Gate Protection |
Use Scenario: Secondary protection on POTS or DSL line cards where primary GDT-based protection is followed by fine-clamping. IC Role / Device Role / Timing Role: Final-stage TVS in series with current-limiting resistor, suppressing residual transients after upstream gas discharge tube clamping. Use Value: Meets UL 497B requirements for telecom surge immunity while holding clamping voltage below 25 V to protect line-driver ICs. |
Use Scenario: Shielding N-channel MOSFET gate-source terminals from ESD and Miller-induced spikes in half-bridge motor drivers. IC Role / Device Role / Timing Role: Low-capacitance TVS connected directly across gate and source to prevent VGS overstress beyond ±20 V rating. Use Value: 100 pF capacitance avoids slowing gate drive edges; 24.4 V clamping ensures gate oxide remains intact during 8 kV HBM ESD events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ15A | Same VWM (15 V), lower PPPM (600 W), SMC package (surface-mount), 28.5 V clamping at 21.2 A | Better suited for space-constrained PCBs; less robust for high-repetition surges in industrial environments | Select SMBJ15A only when board area is critical and surge energy is limited to <600 W per event. |
| 1.5KE15A | Identical electrical specs and 1.5KE package; differs only in packaging format (bulk vs. tape-and-reel E3/54) | No functional difference; same thermal and electrical behavior in circuit | 1.5KE15A is functionally identical-choose LCE15-E3/54 for RoHS-compliant, whisker-tested, tape-and-reel delivery. |
Compared with SMBJ15A and 1.5KE15A, the LCE15-E3/54 delivers full 1500 W surge capacity in a RoHS-compliant, JESD201 Class 1A whisker-tested 1.5KE package with tape-and-reel logistics-making it optimal for high-reliability industrial production where both performance and supply-chain compliance matter.
Availability
LCE15-E3/54 is available at Aetrix Electronics and suitable for industrial sensor interfaces, DC power rail protection, and telecom line protection requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for LCE15-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, ruggedness, and industry-standard qualification.
The LCE15-E3/54 belongs to Vishay's Low Capacitance TRANSZORB® family-engineered specifically for high-energy transient suppression in industrial, telecom, and automotive auxiliary systems where clamping precision and thermal stability are critical.
FAQ
What is the maximum clamping voltage of the LCE15-E3/54 under surge conditions?
The LCE15-E3/54 has a maximum clamping voltage (VC) of 24.4 V at 61 A peak pulse current (IPPM) using the standard 10/1000 µs waveform. This value is measured per Figure 3 in Vishay document 88357 and defines the upper voltage limit imposed on protected circuitry during a full-rated surge event. The LCE15-E3/54 maintains this clamping performance across its qualified operating temperature range.
Is the LCE15-E3/54 suitable for bidirectional signal line protection?
No-the LCE15-E3/54 is a unidirectional TVS diode and must not be used alone on AC or bidirectional signal lines. For such applications, two LCE15-E3/54 devices must be connected in series opposition (anode-to-anode or cathode-to-cathode), as shown in Figure 4 of the Vishay datasheet. Using a single LCE15-E3/54 on AC signals risks forward conduction and failure during normal operation.
Does the LCE15-E3/54 meet UL 497B for telecom surge protection?
Yes-the LCE15-E3/54 is UL listed under file E136766 for Telecom Application Protection per UL 497B. This certification applies to the entire LCE6.5A–LCE28A family, including the LCE15-E3/54, and confirms compliance with surge withstand requirements for primary and secondary telecom circuits, including lightning-induced transients up to specified levels.
What is the junction capacitance of the LCE15-E3/54, and how does it affect signal integrity?
The LCE15-E3/54 has a maximum junction capacitance of 100 pF at 0 V, as specified in the Electrical Characteristics table of Vishay document 88357. This low capacitance allows use on moderate-speed digital and analog signal lines-including RS-485, CAN, and sensor outputs-without introducing significant rise-time degradation or signal reflection, provided trace impedance and layout parasitics are controlled.
Can the LCE15-E3/54 replace the 1.5KE15A in an existing design?
Yes-the LCE15-E3/54 is electrically and mechanically identical to the 1.5KE15A, sharing the same 1.5KE package, VWM, VBR, VC, and PPPM. The LCE15-E3/54 adds RoHS compliance, JESD201 Class 1A whisker resistance, and E3/54 tape-and-reel packaging. No PCB or schematic changes are needed when substituting LCE15-E3/54 for 1.5KE15A in legacy designs.
LCE15-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):
- 15V
- Voltage - Breakdown (Min):
- 16.7V
- Voltage - Clamping (Max) @ Ipp:
- 26.9V
- Current - Peak Pulse (10/1000µs):
- 56A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 1.5KE
LCE15-E3/54 FAQ
1.How can I place an order for LCE15-E3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for LCE15-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 LCE15-E3/54 reliable?
The price and inventory of LCE15-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 LCE15-E3/54 is usually 5 days.
3.What payment methods are accepted for LCE15-E3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LCE15-E3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LCE15-E3/54?
LCE15-E3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LCE15-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 LCE15-E3/54?
For technical support, including LCE15-E3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LCE15-E3/54 requirements.
6.How does Aetrix verify that LCE15-E3/54 is sourced from the original manufacturer or authorized distributors?
All LCE15-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 LCE15-E3/54 meets industry standards.
7.What is the process for return or replacement of LCE15-E3/54?
All LCE15-E3/54 units undergo pre-shipment inspection (PSI). If there is an issue with LCE15-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 LCE15-E3/54 part is unused and in its original packaging.
Return procedure for LCE15-E3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LCE15-E3/54 Tags
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