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Vishay General Semiconductor - Diodes Division LCE22-E3/73
- Part No.:
- LCE22-E3/73
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
LCE22-E3/73.pdf
- Description:
- TVS DIODE 22VWM 39.4VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:4,610
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Product details
Overview
LCE22-E3/73 from Vishay General Semiconductor is a unidirectional low-capacitance TRANSZORB® transient voltage suppressor (TVS) diode designed for robust overvoltage protection of sensitive electronics. It features a 22 V stand-off voltage (VWM), 24.4–26.9 V breakdown voltage (VBR), 1500 W peak pulse power (10/1000 µs), 42 A maximum peak pulse current (IPPM), and clamps to ≤35.5 V at rated surge current - deployed on signal lines, MOSFET gates, and sensor interfaces in industrial and telecom systems.
For engineers reviewing the LCE22-E3/73 datasheet, LCE22-E3/73 pinout, LCE22-E3/73 application, or LCE22-E3/73 equivalent, this page delivers verified electrical parameters, package dimensions, real-world use cases, and validated alternative parts - all aligned with Vishay Document #88357 (Rev. 24-Sep-12) and UL 497B listing for telecom surge protection.
Technical Context
The LCE22-E3/73 operates as a unidirectional avalanche diode with glass-passivated junction, optimized for fast response (<1 ns) and low incremental surge resistance. Its 1.5KE case enables high thermal dissipation (6.5 W on infinite heatsink) and supports repetitive 0.01% duty-cycle surges per JESD22-B106 soldering specs (275 °C, 10 s).
It meets UL 497B for telecom line protection and complies with RoHS (E3 suffix) and JESD201 Class 1A whisker testing. The device exhibits 100 pF junction capacitance at 0 V and ≤1.0 mA reverse leakage at 22 V stand-off, making it suitable for high-speed data line protection where capacitive loading must be minimized.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 22 V - Maximum continuous reverse operating voltage before clamping begins; defines safe working range for protected circuitry. |
| VBR (min/max) | 24.4 V / 26.9 V - Measured at 1 mA test current; ensures predictable avalanche onset across production lot. |
| IPPM | 42 A - Peak surge current survivable under 10/1000 µs waveform; determines minimum series impedance for system-level IEC 61000-4-5 compliance. |
| VC | ≤35.5 V - Clamped voltage at 42 A; sets upper bound on voltage seen by downstream ICs during transient events. |
| Junction Capacitance | 100 pF at 0 V - Low enough for USB 2.0, RS-485, and CAN FD signal line protection without signal integrity degradation. |
| TJ max | 175 °C - Enables reliable operation in high-ambient industrial environments without derating below full power. |
| Polarity | Unidirectional - Requires correct orientation relative to DC bias; cathode marked by color band for PCB assembly verification. |
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, 0.375" (9.5 mm) lead length.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or lowest potential node; forms return path during clamping event. |
| Cathode | High-side surge input terminal | Marked by color band; connects to protected line; conducts avalanche current when VIN exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity stress. |
| 1500 W peak pulse power (10/1000 µs) | Supports Level 4 IEC 61000-4-5 surge immunity (4 kV line-to-ground) with appropriate PCB layout and series impedance. |
| UL 497B listed | Validated for telecom interface protection including POTS, DSL, and T1/E1 lines - reduces certification effort for end equipment. |
| 100 pF junction capacitance | Enables use on 10–50 Mbps serial buses without measurable rise-time degradation or EMI coupling. |
| JESD201 Class 1A whisker resistance | Eliminates risk of tin whisker growth-induced short circuits in long-life industrial deployments (>10 years). |
Applications
| Industrial Sensor Interface Protection | Telecom Line Surge Suppression |
|---|---|
Use Scenario: Protecting 4–20 mA current-loop sensors and analog front-ends from inductive switching transients in factory automation PLCs. IC Role / Device Role / Timing Role: Unidirectional TVS placed between signal line and ground, clamping surges before they reach precision ADC or op-amp inputs. Use Value: Limits voltage excursion to ≤35.5 V during 42 A transients, preserving sensor accuracy and preventing latch-up in connected microcontrollers. | Use Scenario: Safeguarding DSL line drivers and receivers against lightning-induced surges on twisted-pair telephone lines per ITU-T K.20/K.21. IC Role / Device Role / Timing Role: Primary protection element in UL 497B-compliant telecom interface, mounted upstream of isolation transformers and line drivers. Use Value: Absorbs 1500 W pulses without degradation, maintaining signal integrity up to 2.2 MHz while meeting telecom safety standards. |
| MOSFET Gate Protection | RS-485 Transceiver Protection |
Use Scenario: Shielding high-side N-channel MOSFET gates in motor drive half-bridges from Miller-induced voltage spikes during switching transitions. IC Role / Device Role / Timing Role: Fast-clamping TVS tied between gate and source, limiting dV/dt-induced gate oxide stress. Use Value: Responds in <1 ns to clamp gate-source voltage to ≤35.5 V, preventing irreversible dielectric breakdown in 600 V+ MOSFETs. | Use Scenario: Guarding RS-485 transceivers (e.g., MAX13487, SN65HVD72) against ESD and surge events on differential bus lines in building automation networks. IC Role / Device Role / Timing Role: Bidirectional protection implemented using two LCE22-E3/73 devices in anti-parallel configuration per Fig. 4 in datasheet. Use Value: Maintains 100 pF capacitance per line to preserve 25 Mbps data rate while surviving ±30 kV contact ESD (IEC 61000-4-2) and 1 kV ring wave (IEC 61000-4-12). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ22A | Same VWM (22 V), lower PPPM (600 W), smaller SMB package (lower thermal mass), 100 pF CJ. | Lower surge handling limits suitability to consumer-grade or low-energy industrial interfaces only. | Select when board space is constrained and surge threat level is ≤1 kV (IEC 61000-4-5 Level 2). |
| 1.5KE22A | Identical electrical specs and 1.5KE package; differs only in packaging suffix (bulk vs. tape-and-reel) and RoHS compliance status (non-E3). | No functional difference; not suitable for RoHS-mandated production or JESD201 whisker-sensitive applications. | Choose only for legacy rework or non-RoHS prototyping where E3 compliance is not required. |
Compared with SMBJ22A and 1.5KE22A, the LCE22-E3/73 uniquely combines UL 497B listing, JESD201 Class 1A whisker resistance, and RoHS-compliant E3 plating - making it the preferred choice for certified telecom infrastructure and long-lifecycle industrial control designs requiring traceable, compliant components.
Availability
LCE22-E3/73 is available at Aetrix Electronics and suitable for industrial sensor interfaces, telecom line protection, MOSFET gate safeguarding, and RS-485 transceiver hardening requiring stable component supply and full regulatory documentation.
Supply support for LCE22-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, MOSFETs, and protection devices with emphasis on reliability, power efficiency, and application-specific performance.
The LCE22-E3/73 belongs to Vishay's low-capacitance TRANSZORB® TVS family, engineered specifically for high-speed signal line protection in telecom, industrial automation, and automotive subsystems where fast response and minimal parasitic capacitance are critical.
FAQ
What is the maximum clamping voltage of the LCE22-E3/73 at its rated peak pulse current?
The LCE22-E3/73 has a maximum clamping voltage (VC) of 35.5 V when subjected to its rated 42 A peak pulse current (IPPM) under 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 surge events. Designers use this parameter to verify that downstream components remain within their absolute maximum ratings during transient conditions. The LCE22-E3/73 maintains this clamping performance across its full operating temperature range.
Is the LCE22-E3/73 suitable for bidirectional signal line protection?
The LCE22-E3/73 is a unidirectional TVS diode and is not inherently bidirectional. However, Vishay's datasheet explicitly shows in Figure 4 that two LCE22-E3/73 devices can be connected in anti-parallel configuration to provide symmetrical clamping for AC or bidirectional signal lines such as RS-485 or telecom pairs. This arrangement leverages the device's low capacitance and fast response while achieving ±35.5 V clamping. Always observe polarity markings (cathode band) during placement to ensure correct orientation of each LCE22-E3/73 unit.
Does the LCE22-E3/73 meet UL 497B requirements for telecom surge protection?
Yes, the LCE22-E3/73 is UL listed for Telecom Application Protection per UL 497B (File Number E136766), as confirmed in the "Notes" section of Vishay Document #88357. This certification validates its performance in protecting telephone line interfaces against lightning-induced surges and other high-energy transients common in PSTN, DSL, and T1/E1 equipment. The UL 497B listing covers both single-pulse and repetitive surge conditions defined in the standard, and applies directly to the LCE22-E3/73 in its 1.5KE package with E3 termination.
What is the junction capacitance of the LCE22-E3/73 and how does it affect high-speed signal lines?
The LCE22-E3/73 exhibits a maximum junction capacitance of 100 pF at 0 V, as specified in the Electrical Characteristics table of Vishay Document #88357. This low capacitance minimizes signal distortion and insertion loss on high-speed lines - enabling reliable use on interfaces such as RS-485 (up to 25 Mbps), CAN FD (up to 5 Mbps), and USB 2.0 (480 Mbps) when properly decoupled. Unlike higher-capacitance TVS devices, the LCE22-E3/73 avoids excessive rise-time degradation or crosstalk, preserving signal integrity without requiring complex impedance matching.
How does the E3 suffix in LCE22-E3/73 impact manufacturing and reliability?
The E3 suffix in LCE22-E3/73 indicates RoHS-compliant matte tin plating and conformance to JESD201 Class 1A whisker testing - critical for long-term reliability in industrial and telecom applications. This plating eliminates lead-based finishes and prevents tin whisker growth that could cause latent field failures in high-reliability systems. The E3 designation also confirms compliance with JEDEC JS709A halogen-free requirements. These attributes make the LCE22-E3/73 suitable for automated SMT assembly, reflow profiles up to 260 °C, and deployments exceeding 10-year service life without corrosion or intermetallic degradation.
LCE22-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):
- 22V
- Voltage - Breakdown (Min):
- 24.4V
- Voltage - Clamping (Max) @ Ipp:
- 39.4V
- Current - Peak Pulse (10/1000µs):
- 38A
- 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
LCE22-E3/73 FAQ
1.How can I place an order for LCE22-E3/73 through Aetrix?
Please submit a Request for Quotation (RFQ) for LCE22-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 LCE22-E3/73 reliable?
The price and inventory of LCE22-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 LCE22-E3/73 is usually 5 days.
3.What payment methods are accepted for LCE22-E3/73?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LCE22-E3/73 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LCE22-E3/73?
LCE22-E3/73 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LCE22-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 LCE22-E3/73?
For technical support, including LCE22-E3/73 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LCE22-E3/73 requirements.
6.How does Aetrix verify that LCE22-E3/73 is sourced from the original manufacturer or authorized distributors?
All LCE22-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 LCE22-E3/73 meets industry standards.
7.What is the process for return or replacement of LCE22-E3/73?
All LCE22-E3/73 units undergo pre-shipment inspection (PSI). If there is an issue with LCE22-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 LCE22-E3/73 part is unused and in its original packaging.
Return procedure for LCE22-E3/73:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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