My Inquiry
My Account
Vishay General Semiconductor - Diodes Division LCE7.5A-E3/54
- Part No.:
- LCE7.5A-E3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
LCE7.5A-E3/54.pdf
- Description:
- TVS DIODE 7.5VWM 12.9VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:8,049
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LCE7.5A-E3/54 from Vishay General Semiconductor is a unidirectional low-capacitance TRANSZORB® transient voltage suppressor (TVS) diode in the 1.5KE package, rated for 7.5 V standoff voltage (VWM), 8.33–9.21 V breakdown (VBR), 12.9 V clamping at 250 A peak pulse current, and 1500 W peak pulse power with 10/1000 µs waveform. It protects MOSFETs, ICs, and sensor signal lines against inductive switching transients and lightning surges in industrial and telecom systems.
For engineers reviewing the LCE7.5A-E3/54 datasheet, LCE7.5A-E3/54 pinout, LCE7.5A-E3/54 application, or LCE7.5A-E3/54 equivalent, key selection criteria include unidirectional polarity, 12.9 V clamping voltage at 250 A, 7.5 V working voltage, 100 pF junction capacitance, and UL 497B listing for telecom surge protection.
Technical Context
This TVS diode employs a glass-passivated silicon junction to achieve fast response time (<1 ns) and low incremental surge resistance, enabling effective clamping of fast-rising transients before downstream components are damaged. Its 1.5KE molded epoxy package meets UL 94 V-0 flammability rating and supports matte tin-plated leads compliant with J-STD-002 solderability standards.
The device operates across -65 °C to +175 °C junction temperature range and is derated linearly above 25 °C ambient, maintaining 6.5 W steady-state power dissipation at TL = 75 °C on an infinite heatsink. It is certified UL listed (E136766) for telecom application protection per UL 497B.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Standoff Voltage) | 7.5 V - Maximum continuous reverse voltage before significant leakage; sets operating margin below breakdown |
| VBR (Breakdown Voltage) | 8.33–9.21 V at 1 mA - Confirmed avalanche onset range; ensures reliable triggering during overvoltage events |
| VC (Clamping Voltage) | 12.9 V at IPP = 250 A - Peak voltage seen by protected circuit during 10/1000 µs surge; defines worst-case stress level |
| PPPM (Peak Pulse Power) | 1500 W - Sustains single 10/1000 µs transient without failure; enables robust protection in high-energy environments |
| Junction Capacitance | 100 pF at 0 V - Low enough for signal integrity preservation on data lines up to ~10 MHz bandwidth |
| Polarity | Unidirectional - Blocks reverse voltage only; requires correct orientation relative to DC bias in circuit |
| UL Recognition | UL 497B listed (E136766) - Validated for telecom primary/secondary surge protection per industry safety standard |
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-plated leads, cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side of protected line; conducts during forward-biased operation or AC bipolar configurations |
| Cathode | Avalanche clamping terminal | Marked with color band; connected to higher-potential side; conducts reverse avalanche current during overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enables stable, repeatable avalanche characteristics and long-term reliability under repetitive surge stress |
| 1500 W peak pulse power (10/1000 µs) | Supports protection against high-energy transients such as ISO 7637-2 Pulse 5a or IEC 61000-4-5 Combination Wave (10/700 µs) |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients, improving clamping precision and system-level immunity |
| UL 497B listing (E136766) | Validates suitability for telecom interface protection without additional certification burden for end-equipment designers |
| 100 pF junction capacitance | Preserves signal integrity on RS-485, CAN, or sensor analog lines without excessive high-frequency attenuation |
Applications
| Industrial Motor Control | Telecom Line Interface |
|---|---|
Use Scenario: Protection of gate drivers and logic inputs in PLC output modules subjected to inductive kickback from solenoid/relay coils. IC Role / Device Role / Timing Role: Unidirectional TVS placed across relay coil or between driver output and ground to clamp flyback spikes. Use Value: Limits transient voltage to ≤12.9 V, preventing latch-up or permanent damage to 5 V/3.3 V logic and MOSFET gate oxides. | Use Scenario: Primary-side surge suppression on POTS or xDSL line interfaces exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Standoff-rated TVS installed between tip/ring and ground, upstream of isolation transformer and line driver. Use Value: UL 497B recognition ensures compliance with telecom safety requirements while clamping 10/1000 µs surges to safe levels for downstream circuitry. |
| Automotive Sensor Signal Lines | Consumer Appliance Power Supply Inputs |
Use Scenario: ESD and load-dump protection for analog sensor outputs (e.g., temperature, pressure) in engine control units. IC Role / Device Role / Timing Role: Low-capacitance TVS placed at connector entry point, shunting transients before signal conditioning amplifiers. Use Value: 100 pF capacitance avoids filtering of DC-coupled sensor signals; 7.5 V VWM matches typical 5 V rail margins. | Use Scenario: Secondary-side transient suppression on DC input rails of smart home hubs and appliance controllers. IC Role / Device Role / Timing Role: Unidirectional TVS mounted across 12 V or 24 V supply input to absorb switching noise and coupling from adjacent AC stages. Use Value: 1500 W rating handles repeated surges from relay contact bounce or nearby inductive loads without degradation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ7.0A | Lower VWM (7.0 V), lower PPPM (600 W), SMB package (smaller footprint, lower thermal mass) | Better suited for space-constrained PCBs with lower energy threat profiles; not UL 497B listed | Select when board area is critical and surge energy remains ≤600 W; verify thermal derating for continuous operation |
| 1.5KE7.5A | Identical electrical specs and 1.5KE package; differs only in packaging suffix (E3/54 vs. standard bulk/reel codes) | No functional difference; same UL listing, same mechanical dimensions and soldering profile | Direct form-fit-function replacement where tape-and-reel delivery is not required |
Compared with SMBJ7.0A and 1.5KE7.5A, the LCE7.5A-E3/54 provides UL 497B certification and 1500 W capability in a standardized 1.5KE reel format-critical for telecom and industrial OEMs requiring audit-ready compliance and high-energy robustness.
Availability
LCE7.5A-E3/54 is available at Aetrix Electronics and suitable for industrial motor control, telecom line interface, and automotive sensor signal line protection requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for LCE7.5A-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, power handling, and industry-standard compliance.
The LCE7.5A-E3/54 belongs to Vishay's TRANSZORB® low-capacitance TVS family, engineered specifically for high-energy transient suppression in telecom infrastructure, industrial automation, and automotive electronics where UL recognition and precise clamping are mandatory.
FAQ
What is the clamping voltage of the LCE7.5A-E3/54 at its rated peak pulse current?
The LCE7.5A-E3/54 has a maximum clamping voltage (VC) of 12.9 V at 250 A peak pulse current (IPP) with a 10/1000 µs waveform. This value is measured per Figure 3 in the official Vishay datasheet (Document Number: 88357) and defines the upper voltage limit imposed on protected circuitry during surge events. The LCE7.5A-E3/54 maintains this clamping performance across its specified operating temperature range.
Is the LCE7.5A-E3/54 suitable for bidirectional signal line protection?
No-the LCE7.5A-E3/54 is a unidirectional TVS diode and must be used with correct polarity alignment relative to DC bias. For bidirectional AC or symmetrical signal lines (e.g., RS-485, telephone lines), two LCE7.5A-E3/54 devices are required in anti-parallel configuration. The LCE7.5A-E3/54 itself does not provide symmetrical clamping without external pairing.
Does the LCE7.5A-E3/54 meet UL 497B requirements for telecom surge protection?
Yes-the LCE7.5A-E3/54 is UL listed under file number E136766 for Telecom application protection per UL 497B. This certification is explicitly stated in the Vishay datasheet (Document Number: 88357, page 2, "Note" section) and confirms compliance with insulation, flammability, and surge withstand requirements for primary and secondary telecom circuits.
What is the junction capacitance of the LCE7.5A-E3/54, and how does it affect signal integrity?
The LCE7.5A-E3/54 exhibits a maximum junction capacitance of 100 pF at 0 V, as specified in the Electrical Characteristics table of the Vishay datasheet. This low capacitance minimizes loading on high-speed or high-impedance signal paths-such as sensor analog outputs or RS-485 differential pairs-preserving bandwidth and avoiding unintended filtering or timing skew in the LCE7.5A-E3/54-protected circuit.
Can the LCE7.5A-E3/54 replace the 1.5KE7.5A in existing designs?
Yes-the LCE7.5A-E3/54 shares identical electrical specifications, thermal ratings, mechanical dimensions, and UL 497B listing with the 1.5KE7.5A. The "LCE" prefix denotes Vishay's commercial-grade, RoHS-compliant variant with E3 matte tin plating and JESD 201 Class 1A whisker resistance; no PCB layout or schematic changes are needed for drop-in substitution of the LCE7.5A-E3/54.
LCE7.5A-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:
- 12.9V
- 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
LCE7.5A-E3/54 FAQ
1.How can I place an order for LCE7.5A-E3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for LCE7.5A-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 LCE7.5A-E3/54 reliable?
The price and inventory of LCE7.5A-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 LCE7.5A-E3/54 is usually 5 days.
3.What payment methods are accepted for LCE7.5A-E3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LCE7.5A-E3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LCE7.5A-E3/54?
LCE7.5A-E3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LCE7.5A-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 LCE7.5A-E3/54?
For technical support, including LCE7.5A-E3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LCE7.5A-E3/54 requirements.
6.How does Aetrix verify that LCE7.5A-E3/54 is sourced from the original manufacturer or authorized distributors?
All LCE7.5A-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 LCE7.5A-E3/54 meets industry standards.
7.What is the process for return or replacement of LCE7.5A-E3/54?
All LCE7.5A-E3/54 units undergo pre-shipment inspection (PSI). If there is an issue with LCE7.5A-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 LCE7.5A-E3/54 part is unused and in its original packaging.
Return procedure for LCE7.5A-E3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LCE7.5A-E3/54 Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
