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Vishay General Semiconductor - Diodes Division LCE7.5-E3/54
- Part No.:
- LCE7.5-E3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
LCE7.5-E3/54.pdf
- Description:
- TVS DIODE 7.5VWM 14.3VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:2,284
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Product details
Overview
LCE7.5-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 7.5 V standoff voltage (VWM), 8.33–9.21 V breakdown voltage (VBR), 12.9 V clamping voltage at 100 A peak pulse current, 1500 W peak pulse power (10/1000 μs), and operates across –65 °C to +175 °C junction temperature.
For engineers reviewing the LCE7.5-E3/54 datasheet, LCE7.5-E3/54 pinout, LCE7.5-E3/54 application, or LCE7.5-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 LCE7.5-E3/54 employs a glass-passivated silicon junction for stable avalanche clamping under fast transients. Its 10/1000 μs waveform response delivers precise voltage limiting with ≤12.9 V clamping at 100 A, while maintaining only 100 pF junction capacitance at 0 V - critical for preserving signal integrity on high-speed data lines.
Designed for repetitive surge duty cycles up to 0.01 %, it supports continuous operation at 6.5 W power dissipation on an infinite heatsink at TL = 75 °C. The device meets JESD 22-B106 soldering requirements (275 °C, 10 s) and JESD 201 Class 1A whisker testing, confirming reliability in commercial-grade applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.5 V - Maximum reverse working voltage before leakage exceeds 250 μA; defines safe operating margin below clamping threshold |
| VBR (min/max) | 8.33 V / 9.21 V at 10 mA - Confirmed avalanche onset range ensures predictable turn-on during ESD or switching surges |
| VC @ IPP | 12.9 V at 100 A - Clamping voltage limits downstream IC stress during 1500 W transient events |
| Junction Capacitance | 100 pF at 0 V - Low enough to avoid signal distortion on USB, RS-485, or sensor analog lines |
| Peak Pulse Power | 1500 W (10/1000 μs) - Supports IEC 61000-4-5 Level 4 surge immunity compliance |
| Polarity | Unidirectional - Requires cathode-band orientation toward protected line; not suitable for AC line protection without back-to-back pairing |
| TJ Range | –65 °C to +175 °C - Enables deployment in under-hood automotive modules or industrial motor drives |
Pinout & Package
Package: 1.5KE molded epoxy case (Case Style 1.5KE), RoHS-compliant, matte tin-plated leads, UL 94 V-0 rated molding compound. Polarity indicated by cathode band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or common return path; completes clamping loop during transient |
| Cathode (banded end) | Protected line connection | Connected to signal or power rail requiring overvoltage suppression; conducts when Vin > VBR |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated chip junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity exposure |
| 1500 W peak pulse power (10/1000 μs) | Withstands repeated lightning-induced surges per IEC 61000-4-5 without degradation |
| 100 pF junction capacitance | Minimizes loading on 1–10 MHz sensor outputs and digital control lines without bandwidth reduction |
| UL 497B listed (E136766) | Validated for telecom interface protection including DSL, POTS, and Ethernet PHY front-ends |
| Matte tin plating, J-STD-002 compliant | Guarantees reliable solder wetting and intermetallic formation in automated SMT reflow processes |
Applications
| Industrial Sensor Interface | Automotive Body Control Module |
|---|---|
Use Scenario: Protecting 4–20 mA current-loop transmitters and analog voltage sensors (e.g., pressure, temperature) from load-dump and inductive kickback in factory automation systems. IC Role / Device Role / Timing Role: Unidirectional TVS placed between sensor output and PLC input to clamp transients before they reach ADC or op-amp front-end. Use Value: Prevents latch-up or permanent damage to precision analog circuitry while maintaining <1% gain error due to 100 pF loading. | Use Scenario: Safeguarding LIN bus transceivers and microcontroller GPIOs against battery reverse-connection and alternator load dump in door module ECUs. IC Role / Device Role / Timing Role: Standoff-rated TVS on LIN data line (VWM = 7.5 V) absorbs 12 V system surges without forward conduction during normal operation. Use Value: Enables compliance with ISO 7637-2 Pulse 1/2a/5a test levels without adding series impedance or RC filtering. |
| Telecom DSL Line Card | Power Supply Input Stage |
Use Scenario: Front-end protection of ADSL/VDSL line drivers and hybrid couplers exposed to induced surges from nearby AC wiring or lightning coupling. IC Role / Device Role / Timing Role: Paired unidirectional LCE7.5-E3/54 units (anode-to-anode) provide bidirectional clamping on differential pair, referenced to chassis ground. Use Value: UL 497B certification confirms suitability for telco central office and customer premises equipment per GR-1089-CORE. | Use Scenario: Secondary-side transient suppression on 5 V or 12 V DC-DC converter outputs feeding FPGA I/O banks or memory controllers. IC Role / Device Role / Timing Role: Fast-response TVS placed immediately after filter capacitor to limit overshoot from hot-swap or capacitive load switching. Use Value: 12.9 V clamping prevents VCC rail excursion beyond absolute maximum ratings of downstream logic devices. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ7.5A | Same VWM (7.5 V), lower PPPM (600 W), DO-214AA package (smaller footprint, higher thermal resistance) | Preferred for space-constrained PCBs where 600 W surge rating suffices; not UL 497B listed | Select SMBJ7.5A only if board area is critical and surge threat level is ≤IEC 61000-4-5 Level 2 |
| 1.5KE7.5A | Identical electrical specs and 1.5KE package; differs only in packaging suffix (bulk vs. tape-and-reel) and RoHS compliance grade (E3 vs. non-E3) | No functional difference; used interchangeably where E3 whisker testing is not required | Choose 1.5KE7.5A for cost-sensitive production runs without extended reliability validation needs |
Compared with SMBJ7.5A and 1.5KE7.5A, the LCE7.5-E3/54 provides certified telecom-grade surge handling (UL 497B), enhanced whisker resistance (JESD 201 Class 1A), and guaranteed 1500 W capability in the same 1.5KE form factor - making it optimal for industrial and telecom infrastructure designs demanding full compliance traceability.
Availability
LCE7.5-E3/54 is available at Aetrix Electronics and suitable for industrial sensor interface, automotive body control module, and telecom DSL line card applications requiring stable component supply, long-term lifecycle support, and certified surge protection performance.
Supply support for LCE7.5-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 efficiency, and application-specific performance.
The LCE7.5-E3/54 belongs to Vishay's low-capacitance TRANSZORB® family, engineered specifically for high-speed signal line protection where minimal parasitic capacitance and repeatable clamping behavior are essential - targeting telecom, industrial automation, and automotive subsystems.
FAQ
What is the clamping voltage of the LCE7.5-E3/54 at its rated peak pulse current?
The LCE7.5-E3/54 has a maximum clamping voltage (VC) of 12.9 V at 100 A peak pulse current (IPP), measured using a 10/1000 μs waveform. This value ensures downstream components remain within safe operating voltage limits during transient events. The LCE7.5-E3/54 achieves this clamping performance while maintaining low incremental surge resistance, contributing to consistent energy absorption across multiple surge events.
Is the LCE7.5-E3/54 suitable for bidirectional signal line protection?
No - the LCE7.5-E3/54 is a unidirectional TVS diode and must be used with a second unit in anti-parallel configuration for true bidirectional protection. Its polarity is marked by a cathode band, and it conducts only when the cathode is more positive than the anode by ≥VBR. For AC-coupled or differential lines like RS-485 or telecom pairs, two LCE7.5-E3/54 devices are required in opposite orientation to protect both positive and negative transients.
Does the LCE7.5-E3/54 meet UL 497B requirements for telecom surge protection?
Yes - the LCE7.5-E3/54 is UL listed under file number E136766 for Telecom Application Protection per UL 497B. This certification validates its performance in protecting telephone network interfaces, DSL modems, and other telecom infrastructure against lightning-induced surges and power cross events. The LCE7.5-E3/54's 1500 W peak pulse rating and controlled clamping behavior directly support this qualification.
What is the junction capacitance of the LCE7.5-E3/54 and why does it matter?
The LCE7.5-E3/54 exhibits 100 pF junction capacitance at 0 V, measured per standard test conditions. This low value minimizes signal attenuation and phase shift on high-frequency lines such as sensor analog outputs, LIN bus, or low-speed serial interfaces. In contrast, standard TVS diodes often exceed 500 pF, which can distort waveforms or reduce noise margins - making the LCE7.5-E3/54 especially valuable in precision measurement and timing-critical applications.
Can the LCE7.5-E3/54 replace the 1.5KE7.5A in existing designs?
Yes - the LCE7.5-E3/54 is functionally and mechanically identical to the 1.5KE7.5A, sharing the same 1.5KE package, electrical characteristics, and thermal profile. The "E3" suffix indicates RoHS compliance and JESD 201 Class 1A whisker resistance, while "/54" denotes 13″ paper tape and reel packaging. No PCB layout changes are needed when substituting LCE7.5-E3/54 for 1.5KE7.5A in new or legacy designs requiring enhanced reliability assurance.
LCE7.5-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):
- 7.5V
- Voltage - Breakdown (Min):
- 8.33V
- Voltage - Clamping (Max) @ Ipp:
- 14.3V
- Current - Peak Pulse (10/1000µs):
- 100A
- 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
LCE7.5-E3/54 FAQ
1.How can I place an order for LCE7.5-E3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for LCE7.5-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 LCE7.5-E3/54 reliable?
The price and inventory of LCE7.5-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 LCE7.5-E3/54 is usually 5 days.
3.What payment methods are accepted for LCE7.5-E3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LCE7.5-E3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LCE7.5-E3/54?
LCE7.5-E3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LCE7.5-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 LCE7.5-E3/54?
For technical support, including LCE7.5-E3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LCE7.5-E3/54 requirements.
6.How does Aetrix verify that LCE7.5-E3/54 is sourced from the original manufacturer or authorized distributors?
All LCE7.5-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 LCE7.5-E3/54 meets industry standards.
7.What is the process for return or replacement of LCE7.5-E3/54?
All LCE7.5-E3/54 units undergo pre-shipment inspection (PSI). If there is an issue with LCE7.5-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 LCE7.5-E3/54 part is unused and in its original packaging.
Return procedure for LCE7.5-E3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LCE7.5-E3/54 Tags
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