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Semtech Corporation LCDA24.TBT
- Part No.:
- LCDA24.TBT
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LCDA24.TBT.pdf
- Description:
- TVS DIODE 24VWM 55VC 8-SO
- Quantity:
- Payment:
- Shipping:
Inventory:2,776
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Product details
Overview
LCDA24.TBT from Semtech is a transient diverting suppressor designed for high-energy EOS protection of 22V-rated power or I/O lines, featuring ±30kV IEC 61000-4-2 ESD immunity, 40A (8/20μs) peak pulse current handling, and stable 27.5–28V clamping voltage across temperature and current range - deployed in USB Type-C PD input protection and industrial load switch front-end circuits.
For engineers reviewing the LCDA24.TBT datasheet, pinout, applications, or equivalent options, key selection criteria include clamping voltage stability under 40A surge, DFN-6 thermal and layout performance, low dynamic resistance (<20 mΩ), and compatibility with 22V bus systems requiring robust EOS resilience without TVS-like voltage drift.
Technical Context
The LCDA24.TBT uses a surge-rated FET as its primary protection element, activated by a precision trigger circuit that turns on the shunt path when transient voltage exceeds breakdown. Unlike conventional TVS diodes, its clamping voltage remains nearly constant due to decreasing RDS(on) under increasing current.
It operates over –40°C to +125°C, maintains ≤600 nA reverse leakage at 22V, and delivers 1120W peak pulse power (8/20μs). Its functional architecture separates trigger threshold (≈27V) from conduction path, enabling stable clamping independent of ambient temperature or surge amplitude.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 22 V - matches nominal USB PD and industrial 24V rail systems without derating. |
| Clamping Voltage | 27.5–28 V at 40A (8/20μs) - stays within safe margin below typical 30V+ IC damage thresholds. |
| Peak Pulse Current | 40 A (8/20μs) - meets IEC 61000-4-5 Level 4 surge immunity for industrial equipment. |
| ESD Withstand | ±30 kV contact & air (IEC 61000-4-2) - exceeds Class 4 system-level ESD requirements. |
| Dynamic Resistance | 20 mΩ - ensures minimal voltage rise during high-current transients, critical for low-voltage tolerance. |
| Junction Capacitance | 175 pF at 22V - suitable for DC/low-speed power line protection; not intended for high-speed data lines. |
| Operating Temperature | –40°C to +125°C - supports extended-range industrial and automotive under-hood environments. |
Pinout & Package
LCDA24.TBT is housed in a RoHS-compliant DFN-6 package measuring 1.6 mm × 1.6 mm × 0.55 mm with exposed thermal pad (no internal thermal pad required; energy dissipated in silicon).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 | GND | Common ground return path; all three pins must be connected to maximize surge current handling and minimize parasitic inductance. |
| 4, 5, 6 | IN | Protected line input; tied together to interface with single 22V bus (e.g., VBUS in USB-C); enables parallel current sharing across terminals. |
Key Features
| Feature | Design Value |
|---|---|
| Constant-clamp architecture | Clamping voltage varies <0.5 V across 24–40A surge range - eliminates design margin inflation needed with TVS diodes. |
| FET-based shunt topology | Replaces junction-limited TVS with low-RDS(on) MOSFET - reduces thermal stress and improves longevity under repeated surges. |
| Temperature-stable protection | Clamping remains flat from –40°C to +125°C - removes need for derating or thermal compensation in wide-temp designs. |
| High-energy EFT immunity | Withstands ±4 kV per IEC 61000-4-4 (5/50 ns, 100 kHz/5 kHz) - protects against fast repetitive bursts in motor drives and PLCs. |
| Space-optimized packaging | 1.6 mm × 1.6 mm footprint saves >60% board area vs. SO-8 or SOT-23 TVS alternatives - critical for compact USB-C and IoT modules. |
Applications
| USB Type-C Power Delivery Protection | Industrial Load Switch Input Protection |
|---|---|
|
Use Scenario: Protecting VBUS lines in USB-C receptacles supporting up to 20V/5A PD negotiation, exposed to ESD and lightning-induced surges. IC Role / Device Role / Timing Role: Primary front-end EOS suppressor placed between connector and PD controller or load switch. Use Value: Maintains 27.5–28 V clamping at full 40A surge - prevents overvoltage damage to downstream PD controllers rated ≤30V. |
Use Scenario: Safeguarding enable and input rails of industrial-grade load switches (e.g., HS2950P) in remote meters and robotics. IC Role / Device Role / Timing Role: High-current shunt protector absorbing surge energy before it reaches sensitive gate drivers or current-sense circuitry. Use Value: Limits voltage seen by load switch FET to <28 V during ±1 kV (1.2/50 μs) surges - avoids gate oxide rupture or overcurrent latch-up. |
| IoT Edge Node Power Bus Protection | Storage Device 24V Rail Protection |
|
Use Scenario: Securing 22–24V auxiliary power inputs in battery-backed smart sensors and gateway nodes deployed in uncontrolled environments. IC Role / Device Role / Timing Role: Standalone transient suppressor on main DC input, upstream of DC-DC converters and PMICs. Use Value: Delivers 1120 W peak pulse power handling while maintaining <600 nA leakage - preserves battery life and system uptime. |
Use Scenario: Protecting 24V supply rails in NVMe SSD enclosures and enterprise storage backplanes subject to hot-plug and ESD events. IC Role / Device Role / Timing Role: Bus-level clamping device placed at board edge, adjacent to power connector. Use Value: Provides repeatable 27.5 V clamping across –40°C to +125°C - ensures consistent protection during thermal cycling in datacenter environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TDS2211P | Identical electrical specs, same DFN-6 package, identical marking code T22 - confirmed pin-to-pin and functionally equivalent per Semtech documentation. | No change in PCB layout, BOM, or firmware; validated for USB-C PD and load switch use cases. | Select LCDA24.TBT when sourcing through Aetrix Electronics' traceable channel with full lifecycle support. |
| uClamp2411ZA | Lower 40A rating (vs. 40A), same 24V working voltage, but uses standard TVS architecture - clamping rises with current/temperature (VC ≈ 36V at 40A/125°C). | Suitable for CC/SBU lines where capacitance <0.5 pF matters more than clamping stability; not recommended for VBUS. | Choose uClamp2411ZA only for secondary signal-line protection where low capacitance outweighs clamping precision. |
Compared with TDS2211P, LCDA24.TBT offers identical performance and drop-in compatibility, while uClamp2411ZA trades clamping stability for ultra-low capacitance - making LCDA24.TBT the preferred choice for primary 22V power rail protection where voltage margin and thermal consistency are critical.
Availability
LCDA24.TBT is available at Aetrix Electronics and suitable for USB Type-C PD interfaces, industrial load switch inputs, and IoT edge node power buses requiring stable component supply, long-term obsolescence management, and full compliance traceability.
Supply support for LCDA24.TBT 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
Semtech Corporation is a U.S.-based fabless semiconductor company specializing in high-performance analog and mixed-signal ICs for precision protection, sensing, and signal integrity.
LCDA24.TBT belongs to Semtech's Transient Diverting Suppressor (TDS) product line, engineered to replace conventional TVS diodes in high-reliability 22V power rail protection with superior clamping stability and surge endurance.
FAQ
What is the maximum clamping voltage of LCDA24.TBT at 40A surge current?
The LCDA24.TBT clamps at 27.5–28 V under 40A (8/20μs) peak pulse current per IEC 61000-4-5, with minimal variation across temperature. This value is guaranteed by design and verified in characterization - significantly lower and more stable than TVS alternatives whose clamping rises linearly with current. The LCDA24.TBT achieves this via its FET-based shunt architecture, not a pn-junction diode.
Is LCDA24.TBT pin-compatible with TDS2211P?
Yes, LCDA24.TBT is pin-compatible and functionally identical to TDS2211P: both use the same DFN-6 (1.6 mm × 1.6 mm) package, share identical pin configuration (Pins 1–3 = GND, Pins 4–6 = IN), and meet identical electrical specifications including 22V working voltage, ±30kV ESD, and 40A surge rating. The LCDA24.TBT is a Semtech-authorized alternate marking for the same die and assembly.
Can LCDA24.TBT be used on high-speed data lines like USB SuperSpeed or PCIe?
No, LCDA24.TBT is not suitable for high-speed data lines. Its 175 pF junction capacitance at 22V would severely degrade signal integrity on differential pairs operating above ~100 Mbps. It is specifically designed for DC or low-frequency power and control lines - such as USB-C VBUS, load switch inputs, or 24V industrial rails. For SuperSpeed lanes, Semtech recommends RClamp3371ZC (<0.25 pF), not LCDA24.TBT.
What is the thermal behavior of LCDA24.TBT during repeated surge events?
LCDA24.TBT dissipates surge energy in its silicon FET rather than a junction, resulting in stable clamping voltage from –40°C to +125°C with no derating required. Unlike TVS diodes, its clamping does not increase with temperature, and its 1120W peak pulse power rating applies across the full operating range. The LCDA24.TBT requires no external thermal pad - energy is handled internally without thermal runaway risk under specified conditions.
Does LCDA24.TBT require external components for basic operation?
No, LCDA24.TBT operates as a standalone device with no external bias, resistors, or capacitors required. It connects directly between protected line (Pins 4–6) and ground (Pins 1–3). Layout best practice mandates short, low-inductance traces and connection of all six pins - but no additional passive components are needed for functional protection. This simplifies design and reduces BOM count versus multi-component TVS solutions.
LCDA24.TBT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 2
- Voltage - Reverse Standoff (Typ):
- 24V (Max)
- Voltage - Breakdown (Min):
- 26.7V
- Voltage - Clamping (Max) @ Ipp:
- 55V
- Current - Peak Pulse (10/1000µs):
- 5A (8/20µs)
- Power - Peak Pulse:
- 300W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 5pF @ 1MHz
- Operating Temperature:
- -55°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO
LCDA24.TBT FAQ
1.How can I place an order for LCDA24.TBT through Aetrix?
Please submit a Request for Quotation (RFQ) for LCDA24.TBT 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 LCDA24.TBT reliable?
The price and inventory of LCDA24.TBT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LCDA24.TBT is usually 5 days.
3.What payment methods are accepted for LCDA24.TBT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LCDA24.TBT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LCDA24.TBT?
LCDA24.TBT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LCDA24.TBT 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 LCDA24.TBT?
For technical support, including LCDA24.TBT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LCDA24.TBT requirements.
6.How does Aetrix verify that LCDA24.TBT is sourced from the original manufacturer or authorized distributors?
All LCDA24.TBT 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 LCDA24.TBT meets industry standards.
7.What is the process for return or replacement of LCDA24.TBT?
All LCDA24.TBT units undergo pre-shipment inspection (PSI). If there is an issue with LCDA24.TBT, 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 LCDA24.TBT part is unused and in its original packaging.
Return procedure for LCDA24.TBT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LCDA24.TBT Tags
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