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Semtech Corporation RCLAMP0524S.TCT
- Part No.:
- RCLAMP0524S.TCT
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- SOT-23-6
- Datasheet:
-
RCLAMP0524S.TCT.pdf
- Description:
- TVS DIODE 5VWM 26VC SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:9,374
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Product details
Overview
RCLAMP0524S.TCT from Semtech is a transient diverting suppressor (TDS) designed for high-energy EOS/ESD protection of single 24V-rated I/O or power lines in USB Type-C, USB PD, and industrial interfaces. It delivers ±30kV IEC 61000-4-2 ESD immunity, clamps at 28V under 40A 8/20μs surge, maintains <20mΩ dynamic resistance, and operates from –40°C to +125°C.
For engineers reviewing the RCLAMP0524S.TCT datasheet, pinout, applications, or equivalent options, this page provides verified electrical specs, DFN-6 package layout guidance, real-world clamping stability data across temperature and current, and validated alternatives for 24V bus protection in USB PD and load switch designs.
Technical Context
RCLAMP0524S.TCT 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 - 27.6–28V - across 24A to 40A peak pulse current (8/20μs) due to decreasing RDS(on).
The device features three parallel input terminals (Pins 4–6) and three ground terminals (Pins 1–3) in a 1.6mm × 1.6mm DFN-6 package, requiring all six pins to be connected for full 40A surge rating. Its 175pF junction capacitance at 22V and 1MHz is optimized for DC power and low-speed signal line protection-not high-speed data lanes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 24V - matches nominal USB PD VBUS up to 20V + margin; ensures no leakage or conduction during normal operation. |
| Clamping Voltage | 28V @ 40A (8/20μs) - stays within safe operating range of 30V-tolerant load switches and PD controllers. |
| ESD Rating | ±30kV contact & air (IEC 61000-4-2) - exceeds Level 4 immunity requirements for industrial and portable end equipment. |
| Peak Pulse Current | 40A (8/20μs) - satisfies IEC 61000-4-5 Level 3 (±1kV, RS = 42Ω) for unsymmetrical line surges. |
| Dynamic Resistance | 20mΩ - enables stable clamping with minimal voltage rise under increasing surge current. |
| Junction Capacitance | 175pF @ 22V, 1MHz - suitable for power rail and control-line protection; not intended for USB SS or DP/DM lanes. |
| Operating Temp | –40°C to +125°C - supports deployment in automotive cabin modules, industrial PLCs, and outdoor IoT gateways. |
Pinout & Package
Package: DFN-6 (1.6mm × 1.6mm × 0.55mm), RoHS-compliant, UL 94V-0 molding compound, lead-free finish, tape-and-reel packaging (3,000 pcs/reel).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pins 1, 2, 3 | Ground (GND) | All three must be connected to low-inductance ground plane via multiple vias to sustain full 40A surge current capability. |
| Pins 4, 5, 6 | Input (IN) | Parallel-connected protected line terminals; must be routed as single straight trace from connector to maximize surge handling. |
Key Features
| Feature | Design Value |
|---|---|
| FET-based shunt architecture | Enables flat clamping voltage (27.6–28V) across full 24–40A surge range-unlike TVS diodes whose VC rises linearly with IPP. |
| Temperature-stable clamping | Clamping voltage varies ≤0.5V from –40°C to +125°C, eliminating derating concerns in thermally demanding environments. |
| Low dynamic resistance | 20mΩ ensures minimal IR drop during surge, preserving voltage margin between clamp level and downstream IC absolute max ratings. |
| High-energy surge rating | 1120W peak pulse power (8/20μs) supports robust protection against lightning-induced transients in industrial fieldbus nodes. |
| Space-efficient DFN-6 | 1.6mm × 1.6mm footprint saves >60% board area vs. legacy SO-8 or SOT-23 TVS solutions rated for comparable surge energy. |
Applications
| USB Type-C Power Delivery Bus 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 system-level surges. IC Role / Device Role / Timing Role: Transient diverting suppressor placed directly at connector, clamping overvoltage before it reaches PD controller or load switch. Use Value: Maintains 28V clamp across temperature and current-prevents false triggering or damage to 30V-rated controllers like TPS6598x or STUSB4500. |
Use Scenario: Securing input rails of high-side load switches (e.g., TPS229xx, NX3Pxxx) in programmable logic controllers and remote I/O modules. IC Role / Device Role / Timing Role: Primary front-end surge protector absorbing 40A transients to prevent latch-up or gate oxide rupture in internal FETs. Use Value: Low 20mΩ RDYN limits voltage overshoot during fast-rising surges, keeping stress below 30V absolute maximum rating of typical 30V load switches. |
| IoT Gateway Power Rail Protection | Storage Device 24V Backup Supply Protection |
Use Scenario: Hardening 24V auxiliary power inputs in cellular/Wi-Fi edge gateways deployed in uncontrolled environments (e.g., street cabinets, agricultural sensors). IC Role / Device Role / Timing Role: Standalone EOS protector on main DC input, coordinated with upstream fuse and downstream LDO/regulator. Use Value: ±30kV ESD rating and 40A surge capacity meet EN 61000-4-2/4-5 compliance without external series impedance or filtering complexity. |
Use Scenario: Safeguarding 24V backup battery or capacitor bank inputs in NVMe SSD enclosures and RAID controllers during hot-swap or fault events. IC Role / Device Role / Timing Role: Bidirectional overvoltage clamp on storage subsystem power entry point, preventing reverse-current damage during brownout recovery. Use Value: Stable 28V clamping ensures backup supply remains within safe operating window of 30V-rated charge management ICs and PMICs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TDS2211P | 22V working voltage, 27.5–28V clamping @ 40A, 175pF | Optimized for 20–22V USB PD buses; lower clamp than RCLAMP0524S.TCT but narrower voltage margin | Select when protecting 22V systems where tighter clamping headroom is critical and 24V tolerance is unnecessary. |
| SMAJ24A | 24V standoff, 38.9V clamping @ 40A (8/20μs), 500pF, PN-junction TVS | Higher clamping voltage and capacitance; lacks flat-clamp behavior across current/temperature | Choose only if cost sensitivity outweighs performance-requires thermal derating above 85°C and yields higher voltage stress on downstream ICs. |
Compared with TDS2211P and SMAJ24A, RCLAMP0524S.TCT offers superior clamping stability (±0.5V variation) and lower dynamic resistance (20mΩ vs. ~1Ω), enabling reliable 24V system protection without thermal or current-dependent derating-critical for USB PD and industrial load switch applications.
Availability
RCLAMP0524S.TCT is available at Aetrix Electronics and suitable for USB Type-C power delivery interfaces, industrial load switch inputs, and IoT gateway power rails requiring stable component supply, long-term lifecycle support, and guaranteed surge performance across temperature extremes.
Supply support for RCLAMP0524S.TCT 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 analog and mixed-signal ICs for precision sensing, protection, and signal integrity.
RCLAMP0524S.TCT belongs to Semtech's Transient Diverting Suppressor (TDS) family, engineered to replace conventional TVS diodes in high-reliability 24V power and control line protection where flat clamping and temperature stability are mandatory.
FAQ
What is the exact clamping voltage of RCLAMP0524S.TCT at 40A surge current?
The clamping voltage of RCLAMP0524S.TCT is guaranteed at 27.6–28V under 40A peak pulse current (8/20μs waveform, 2Ω source impedance), per Semtech's datasheet Table 2. This value remains stable across –40°C to +125°C, distinguishing it from standard TVS diodes whose clamping rises with temperature and current. The RCLAMP0524S.TCT achieves this via its FET-based shunt architecture and precision trigger circuit.
Can RCLAMP0524S.TCT be used on USB SuperSpeed differential pairs?
No, RCLAMP0524S.TCT is not suitable for USB SuperSpeed (TX/RX) or DisplayPort lanes due to its 175pF junction capacitance at 22V - too high for maintaining signal integrity above 5 Gbps. For those lines, Semtech recommends low-capacitance devices like RClamp3371ZC (<0.25pF). RCLAMP0524S.TCT is specifically intended for 24V power rails, CC/SBU, or low-speed control lines where capacitance is non-critical.
How many pins of RCLAMP0524S.TCT must be connected for full 40A surge rating?
All six pins of RCLAMP0524S.TCT must be connected: Pins 1–3 (GND) to a solid ground plane using multiple vias, and Pins 4–6 (IN) to the protected line via a single low-inductance trace. Semtech explicitly states that omitting any pin reduces peak pulse current capability and compromises thermal dissipation. The RCLAMP0524S.TCT DFN-6 layout requires full pin utilization to achieve its rated 40A (8/20μs) performance.
Does RCLAMP0524S.TCT meet IEC 61000-4-5 Level 3 surge immunity?
Yes, RCLAMP0524S.TCT meets IEC 61000-4-5 Level 3 (±1kV, 1.2/50μs voltage waveform, RS = 42Ω, CS = 0.5μF) for unsymmetrical lines. Its 40A 8/20μs rating and 28V clamping ensure downstream components remain within safe operating limits during such surges. The RCLAMP0524S.TCT datasheet confirms compliance in both Absolute Maximum Ratings and Application Information sections.
What is the junction capacitance of RCLAMP0524S.TCT and at what bias condition is it specified?
The junction capacitance of RCLAMP0524S.TCT is 175pF, measured at VR = 22V and f = 1MHz, per Electrical Characteristics table in the official datasheet. This value reflects the device's state under near-operating-bias conditions and is relevant for estimating AC loading on 24V power or control lines. It is not characterized at 0V bias, and the RCLAMP0524S.TCT does not specify capacitance vs. voltage curves beyond this single operating point.
RCLAMP0524S.TCT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Package/Case:
- SOT-23-6
- Series:
- RailClamp®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 4
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 5V (Max)
- Voltage - Breakdown (Min):
- 6V
- Voltage - Clamping (Max) @ Ipp:
- 26V
- Current - Peak Pulse (10/1000µs):
- 6A (8/20µs)
- Power - Peak Pulse:
- 150W
- 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:
- SOT-23-6
RCLAMP0524S.TCT FAQ
1.How can I place an order for RCLAMP0524S.TCT through Aetrix?
Please submit a Request for Quotation (RFQ) for RCLAMP0524S.TCT 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 RCLAMP0524S.TCT reliable?
The price and inventory of RCLAMP0524S.TCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RCLAMP0524S.TCT is usually 5 days.
3.What payment methods are accepted for RCLAMP0524S.TCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RCLAMP0524S.TCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RCLAMP0524S.TCT?
RCLAMP0524S.TCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RCLAMP0524S.TCT 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 RCLAMP0524S.TCT?
For technical support, including RCLAMP0524S.TCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RCLAMP0524S.TCT requirements.
6.How does Aetrix verify that RCLAMP0524S.TCT is sourced from the original manufacturer or authorized distributors?
All RCLAMP0524S.TCT 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 RCLAMP0524S.TCT meets industry standards.
7.What is the process for return or replacement of RCLAMP0524S.TCT?
All RCLAMP0524S.TCT units undergo pre-shipment inspection (PSI). If there is an issue with RCLAMP0524S.TCT, 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 RCLAMP0524S.TCT part is unused and in its original packaging.
Return procedure for RCLAMP0524S.TCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
RCLAMP0524S.TCT Tags
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