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Vishay General Semiconductor - Diodes Division LCE15A-E3/54
- Part No.:
- LCE15A-E3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
LCE15A-E3/54.pdf
- Description:
- TVS DIODE 15VWM 24.4VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:2,842
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Product details
Overview
LCE15A-E3/54 from Vishay General Semiconductor is a unidirectional low-capacitance TRANSZORB® transient voltage suppressor (TVS) diode designed for robust overvoltage protection of sensitive signal lines. It features a 15.0 V standoff voltage (VWM), 16.7–18.5 V breakdown voltage (VBR), 1500 W peak pulse power (10/1000 µs), 24.4 V clamping voltage at 61 A peak current, and operates from –65 °C to +175 °C junction temperature.
For engineers reviewing the LCE15A-E3/54 datasheet, LCE15A-E3/54 pinout, LCE15A-E3/54 application, or LCE15A-E3/54 equivalent, key selection criteria include its unidirectional polarity, 1.5KE package compatibility, low incremental surge resistance, UL 497B listing for telecom protection, and suitability for high-reliability industrial sensor interface and MOSFET gate protection circuits.
Technical Context
The LCE15A-E3/54 employs a glass-passivated chip junction with molded epoxy encapsulation (UL 94 V-0 rated) and matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards. Its unidirectional architecture provides reverse-biased clamping only, requiring correct polarity orientation in-circuit.
It delivers 1500 W peak pulse power under 10/1000 µs waveform conditions at 0.01 % duty cycle, with clamping performance validated at 61 A IPPM and 24.4 V VC. Thermal derating follows a linear curve from 6.5 W at TL = 75 °C down to zero at TJ = 175 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 15.0 V - Maximum continuous reverse operating voltage before conduction begins; defines safe signal line bias margin. |
| VBR (min/max) | 16.7 V / 18.5 V - Breakdown threshold range at 1 mA test current; ensures consistent turn-on across production lots. |
| VC @ IPPM | 24.4 V at 61 A - Clamped voltage during 10/1000 µs surge; determines maximum stress on downstream ICs. |
| PPPM | 1500 W - Peak pulse power handling capability; supports high-energy transients from inductive switching or ESD. |
| Junction Temp Range | –65 °C to +175 °C - Enables deployment in under-hood automotive, industrial motor drives, and outdoor telecom equipment. |
| Capacitance | 100 pF at 0 V - Low enough for <10 Mbps digital signal lines (e.g., RS-485, CAN, sensor analog outputs) without signal integrity degradation. |
| Polarity | Unidirectional - Requires cathode band aligned toward positive rail; not suitable for AC line protection without back-to-back pairing. |
Pinout & Package
Package: 1.5KE molded epoxy case (Case Style 1.5KE), DO-201AD outline, 0.375" (9.5 mm) lead length, RoHS-compliant matte tin plating, UL 94 V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or circuit return path; conducts during reverse transient events when cathode is at higher potential. |
| Cathode (banded end) | High-side transient clamp node | Connected to protected signal line or power rail; initiates avalanche conduction when voltage exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity exposure. |
| 1500 W peak pulse power (10/1000 µs) | Withstands repetitive surges from relay coil flyback, motor commutation, and lightning-induced coupling without degradation. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (<1 ns response), improving clamping precision. |
| UL 497B listed (E136766) | Validated for telecom interface protection including POTS, DSL, and T1/E1 line cards per industry safety standard. |
| Solder dip rated 275 °C / 10 s | Supports wave and reflow soldering processes without delamination or parameter shift. |
Applications
| Industrial Sensor Interface Protection | Automotive Powertrain Control Module |
|---|---|
Use Scenario: Protecting 4–20 mA current loop and analog voltage outputs of pressure/temperature sensors in factory automation PLCs exposed to relay-induced transients. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between signal line and ground, clamping induced spikes before they reach ADC input or op-amp buffer. Use Value: Prevents sensor output saturation or latch-up during 1 kV/500 A surge events while maintaining <100 pF loading for sub-100 kHz bandwidth signals. | Use Scenario: Safeguarding microcontroller GPIOs and LIN bus transceivers in engine control units subjected to load dump and alternator ripple. IC Role / Device Role / Timing Role: Standoff-rated TVS on 12 V supply rail and LIN data line, absorbing energy from ISO 7637-2 Pulse 1/2a/5a events. Use Value: Maintains functional safety by limiting clamped voltage to 24.4 V, well below MCU absolute maximum ratings, with no derating required up to +125 °C ambient. |
| Telecom DSL Line Card Protection | Industrial Motor Drive Gate Driver Protection |
Use Scenario: Front-end surge suppression on ADSL/VDSL splitter ports in central office line cards meeting GR-1089-CORE requirements. IC Role / Device Role / Timing Role: Primary unidirectional clamp on tip/ring pairs, used in conjunction with GDTs and series impedance for multi-stage telecom protection. Use Value: UL 497B certification confirms compliance for telecom infrastructure; 1500 W rating handles longitudinal surges up to 10/700 µs waveform equivalents. | Use Scenario: Isolating high-side and low-side gate drivers in 3-phase IGBT inverters from Miller-induced dv/dt spikes and shoot-through transients. IC Role / Device Role / Timing Role: TVS placed across gate-emitter terminals of each IGBT to clamp voltage overshoot during fast switching transitions. Use Value: 24.4 V clamping prevents unintended IGBT turn-on; 175 °C max junction temperature supports operation near heatsinks in compact drive enclosures. |
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), SMB package (smaller footprint, lower thermal mass) | Lower surge capacity limits use to consumer-grade or low-energy industrial interfaces | Select when board space is constrained and surge threat level is ≤600 W (e.g., USB, HDMI, low-power sensors) |
| 1.5KE15A | Identical electrical specs and 1.5KE package; differs only in packaging suffix (E3/54 vs. standard bulk/reel) | No functional difference; same UL listing, thermal profile, and clamping behavior | Choose for direct form-fit-function replacement where tape-and-reel delivery is not required |
Compared with SMBJ15A and 1.5KE15A, the LCE15A-E3/54 offers identical surge robustness and thermal capability as 1.5KE15A but ships in 13" paper tape (E3/54), enabling automated SMT placement; versus SMBJ15A, it provides >2× peak power handling essential for industrial motor and telecom infrastructure designs.
Availability
LCE15A-E3/54 is available at Aetrix Electronics and suitable for industrial sensor interface protection, automotive powertrain control modules, and telecom DSL line card surge suppression requiring stable component supply and long-lifecycle support.
Supply support for LCE15A-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, TVS devices, and optoelectronics with emphasis on reliability, power handling, and industrial-grade qualification.
The LCE15A-E3/54 belongs to Vishay's TRANSZORB® low-capacitance TVS family, engineered specifically for high-energy transient suppression in harsh-environment signal and power line applications where clamping precision and thermal resilience are critical.
FAQ
What is the maximum clamping voltage of the LCE15A-E3/54 under standard test conditions?
The LCE15A-E3/54 has a maximum clamping voltage (VC) of 24.4 V when subjected to its rated peak pulse current (IPPM) of 61 A using a 10/1000 µs waveform at TA = 25 °C. This value is measured per Figure 3 in Vishay document 88357 and defines the upper voltage limit imposed on protected circuitry during surge events.
Is the LCE15A-E3/54 suitable for bidirectional signal line protection?
No, the LCE15A-E3/54 is a unidirectional TVS diode and must be used with correct polarity orientation-cathode toward the protected line. For AC or bidirectional signal protection (e.g., RS-485, USB D+/D−), two LCE15A-E3/54 devices must be connected in series opposition, or a dedicated bidirectional part such as the LCE15CA should be selected instead.
Does the LCE15A-E3/54 meet UL safety certification for telecom applications?
Yes, the LCE15A-E3/54 is UL listed under file E136766 for Telecom Application Protection per UL 497B. This certification validates its suitability for use in primary and secondary telecom protection circuits, including DSL, POTS, and T1/E1 line cards, subject to proper system-level implementation per the standard.
What is the junction temperature rating of the LCE15A-E3/54, and how does it affect PCB layout?
The LCE15A-E3/54 supports a junction temperature range of –65 °C to +175 °C. Its high TJmax allows placement near heat sources (e.g., power MOSFETs, transformers) without thermal derating, but PCB copper area under the 1.5KE body should still be minimized to avoid excessive thermal coupling that could accelerate aging.
How does the 100 pF junction capacitance of the LCE15A-E3/54 impact high-speed data lines?
The 100 pF capacitance of the LCE15A-E3/54 at 0 V is appropriate for signal lines operating up to ~10 Mbps (e.g., RS-485, CAN FD up to 2 Mbps, analog sensor outputs). For USB 2.0 (480 Mbps) or HDMI, this capacitance would cause unacceptable signal distortion; lower-capacitance TVS devices (e.g., <10 pF) are recommended instead.
LCE15A-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:
- 24.4V
- Current - Peak Pulse (10/1000µs):
- 61A
- 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
LCE15A-E3/54 FAQ
1.How can I place an order for LCE15A-E3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for LCE15A-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 LCE15A-E3/54 reliable?
The price and inventory of LCE15A-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 LCE15A-E3/54 is usually 5 days.
3.What payment methods are accepted for LCE15A-E3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LCE15A-E3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LCE15A-E3/54?
LCE15A-E3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LCE15A-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 LCE15A-E3/54?
For technical support, including LCE15A-E3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LCE15A-E3/54 requirements.
6.How does Aetrix verify that LCE15A-E3/54 is sourced from the original manufacturer or authorized distributors?
All LCE15A-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 LCE15A-E3/54 meets industry standards.
7.What is the process for return or replacement of LCE15A-E3/54?
All LCE15A-E3/54 units undergo pre-shipment inspection (PSI). If there is an issue with LCE15A-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 LCE15A-E3/54 part is unused and in its original packaging.
Return procedure for LCE15A-E3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LCE15A-E3/54 Tags
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