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Vishay General Semiconductor - Diodes Division LCE7.5A-E3/73
- Part No.:
- LCE7.5A-E3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
LCE7.5A-E3/73.pdf
- Description:
- TVS DIODE 7.5VWM 12.9VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:2,289
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Product details
Overview
LCE7.5A-E3/73 from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in the 1.5KE package, designed for robust overvoltage protection of sensitive electronics. It features a 7.5 V standoff voltage (VWM), 8.33–9.21 V breakdown voltage (VBR), 1500 W peak pulse power (10/1000 µs), 12.9 V clamping voltage at 250 A peak current, and operates from –65 °C to +175 °C junction temperature - deployed in industrial sensor signal lines and MOSFET gate protection.
For engineers reviewing the LCE7.5A-E3/73 datasheet, LCE7.5A-E3/73 pinout, LCE7.5A-E3/73 application, or LCE7.5A-E3/73 equivalent, key selection criteria include clamping performance under 10/1000 µs surge, unidirectional polarity, low incremental surge resistance, RoHS-compliant matte tin leads, and UL 497B listing for telecom surge protection.
Technical Context
This TVS diode uses a glass-passivated chip junction for stable avalanche behavior and fast response (<1 ns) to transients induced by inductive switching or lightning surges. Its 1.5KE molded epoxy package meets UL 94 V-0 flammability rating and supports soldering up to 275 °C for 10 s per JESD 22-B106.
The device delivers 1500 W peak pulse power with 0.01 % duty cycle repeatability and exhibits 100 µA max reverse leakage at VWM, enabling reliable protection without compromising signal integrity in low-power sensor interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.5 V - Maximum continuous reverse operating voltage before clamping begins; sets threshold for circuit-level overvoltage detection. |
| VBR (min/max) | 8.33 V / 9.21 V - Measured at 10 mA test current; defines guaranteed avalanche onset range for design margining. |
| VC @ IPP | 12.9 V @ 250 A - Clamped voltage during 10/1000 µs surge; determines maximum stress on protected downstream ICs. |
| PPPM | 1500 W - Peak pulse power handling capability; validates suitability for IEC 61000-4-5 Level 4 surge immunity testing. |
| TJ max | +175 °C - Maximum junction temperature; enables operation in high-ambient industrial environments without derating. |
| Capacitance | 100 pF @ 0 V - Low junction capacitance minimizes signal distortion on data lines up to ~10 MHz bandwidth. |
| Polarity | Unidirectional - Requires cathode band orientation toward positive rail; suitable for DC-biased protection only. |
Pinout & Package
Package: 1.5KE molded epoxy case (Case Style 1.5KE), axial-leaded, RoHS-compliant matte tin-plated leads, color band denotes cathode terminal.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unbanded end) | Low-side reference node | Connected to ground or negative rail; completes clamping path during positive transients. |
| Cathode (banded end) | Protected line interface | Connected to signal/power line being protected; conducts avalanche current when VLINE exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable, repeatable avalanche characteristics across temperature and lifetime, critical for field-reliable surge protection. |
| 1500 W peak pulse power (10/1000 µs) | Supports compliance with IEC 61000-4-5 surge immunity standards for industrial and telecom equipment. |
| UL 497B listed (E136766) | Validates suitability for telecom line interface protection without additional certification effort. |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients, reducing risk of latch-up or damage in protected ICs. |
| JESD 22-B106 solder compatibility | Enables standard reflow and wave solder processes without lead degradation or delamination risk. |
Applications
| Industrial Sensor Signal Protection | DC Power Rail Clamp |
|---|---|
Use Scenario: Protecting analog output lines of pressure/temperature sensors in factory automation systems exposed to relay coil flyback and motor drive noise. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between sensor output and system ground to clamp ESD and inductive spikes before they reach ADC input stages. Use Value: Limits transient voltage to ≤12.9 V, preventing ADC saturation or internal ESD diode conduction that could cause measurement errors or latch-up. | Use Scenario: Safeguarding 12 V DC input rails feeding microcontrollers and communication ICs in programmable logic controllers (PLCs). IC Role / Device Role / Timing Role: Standoff-rated TVS connected across rail-to-ground to absorb load dump and hot-swap surges without affecting steady-state regulation. Use Value: Withstands 1500 W pulses while maintaining 7.5 V nominal standoff, ensuring uninterrupted operation during automotive-grade 12 V system transients. |
| MOSFET Gate Protection | Telecom Line Interface |
Use Scenario: Shielding N-channel MOSFET gates driven by optocouplers in solid-state relays subject to cross-talk and coupling from adjacent high-dV/dt switching nodes. IC Role / Device Role / Timing Role: Fast-response TVS placed between gate and source to clamp gate-source overvoltage before exceeding ±20 V absolute maximum rating. Use Value: Sub-1 ns response time and 12.9 V clamping prevent gate oxide breakdown and ensure long-term reliability under repetitive switching stress. | Use Scenario: Primary surge protection on POTS (Plain Old Telephone Service) line interfaces in VoIP gateways and DSLAMs compliant with UL 497B. IC Role / Device Role / Timing Role: UL-listed unidirectional TVS used in series with current-limiting resistors and gas discharge tubes for multi-stage telecom surge suppression. Use Value: Validated UL 497B listing (E136766) eliminates need for separate certification, accelerating time-to-market for telecom-certified designs. |
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 | Lower peak pulse power (600 W), SMC package (surface-mount), 100 pF capacitance same | Preferred for space-constrained PCBs; not rated for UL 497B or 1500 W surge levels | Select when board area is limited and surge requirements are ≤IEC 61000-4-5 Level 2. |
| 1.5KE7.5A | Identical electrical specs and 1.5KE package; differs only in packaging suffix (E3/73 vs. standard bulk/reel code) | No functional difference; identical use cases and mounting | Choose for direct form-fit-function replacement where E3/73 tape-and-reel delivery is required. |
Compared with SMBJ7.5A and 1.5KE7.5A, the LCE7.5A-E3/73 uniquely combines UL 497B listing, 1500 W surge capacity, and axial-leaded 1.5KE packaging - making it optimal for through-hole telecom and industrial mains-connected protection where regulatory validation and high-energy clamping are mandatory.
Availability
LCE7.5A-E3/73 is available at Aetrix Electronics and suitable for industrial sensor interfaces, DC power rail clamping, and telecom line protection requiring stable component supply and full traceability.
Supply support for LCE7.5A-E3/73 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 compliance.
The LCE7.5A-E3/73 belongs to Vishay's TRANSZORB® low-capacitance TVS family, engineered specifically for high-energy transient suppression in industrial, telecom, and automotive-adjacent applications where clamping precision and surge endurance are critical.
FAQ
What is the clamping voltage of the LCE7.5A-E3/73 under a 10/1000 µs surge?
The LCE7.5A-E3/73 has a maximum clamping voltage (VC) of 12.9 V when subjected to a 250 A peak pulse current with a 10/1000 µs waveform. This value is measured per Figure 3 in the official Vishay datasheet (Doc. #88357) and defines the upper voltage limit imposed on protected circuits during standardized surge events - essential for verifying compatibility with downstream IC absolute maximum ratings.
Is the LCE7.5A-E3/73 RoHS-compliant and halogen-free?
Yes, the LCE7.5A-E3/73 carries the E3 suffix, confirming RoHS compliance per Directive 2011/65/EU and passing JESD 201 Class 1A whisker testing. While the datasheet does not explicitly declare halogen-free status for this specific variant, Vishay's material policy confirms all E3-suffix parts meet JEDEC JS709A halogen-free standards unless otherwise noted - verified via Vishay's official Material Category Policy documentation.
Can the LCE7.5A-E3/73 be used for AC signal line protection?
No - the LCE7.5A-E3/73 is unidirectional and unsuitable for AC line protection without external circuitry. As stated in the Vishay application note (Fig. 4), AC protection requires two LCE7.5A-E3/73 units connected in parallel but opposite polarity. For single-device AC solutions, bidirectional variants like LCE7.5CA must be selected instead.
What is the maximum operating temperature for the LCE7.5A-E3/73?
The LCE7.5A-E3/73 has a specified operating junction temperature range of –65 °C to +175 °C. This wide thermal envelope allows deployment in harsh environments such as motor control cabinets, outdoor telecom enclosures, and industrial power supplies - provided PCB layout provides adequate thermal relief and power dissipation remains within the 6.5 W steady-state limit at TL = 75 °C.
Does the LCE7.5A-E3/73 have UL certification for telecom applications?
Yes, the LCE7.5A-E3/73 is UL listed under file number E136766 for Telecom Application Protection per UL 497B. This certification covers its use in primary and secondary surge protection circuits for telephone line interfaces, eliminating the need for additional third-party validation when designing UL-compliant telecom equipment.
LCE7.5A-E3/73 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- TransZorb®
- Packaging:
- Tape & Box (TB)
- 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-E3/73 FAQ
1.How can I place an order for LCE7.5A-E3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for LCE7.5A-E3/73 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-E3/73 reliable?
The price and inventory of LCE7.5A-E3/73 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-E3/73 is usually 5 days.
3.What payment methods are accepted for LCE7.5A-E3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LCE7.5A-E3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LCE7.5A-E3/73?
LCE7.5A-E3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LCE7.5A-E3/73 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-E3/73?
For technical support, including LCE7.5A-E3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LCE7.5A-E3/73 requirements.
6.How does Aetrix verify that LCE7.5A-E3/73 is sourced from the original manufacturer or authorized distributors?
All LCE7.5A-E3/73 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-E3/73 meets industry standards.
7.What is the process for return or replacement of LCE7.5A-E3/73?
All LCE7.5A-E3/73 units undergo pre-shipment inspection (PSI). If there is an issue with LCE7.5A-E3/73, 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-E3/73 part is unused and in its original packaging.
Return procedure for LCE7.5A-E3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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