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Semtech Corporation RCLAMP0502B.TCT
- Part No.:
- RCLAMP0502B.TCT
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- SC-75, SOT-416
- Datasheet:
-
RCLAMP0502B.TCT.pdf
- Description:
- TVS DIODE 5VWM 25VC SC75
- Quantity:
- Payment:
- Shipping:
Inventory:22,481
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Product details
Overview
RCLAMP0502B.TCT from Semtech is a transient diverting suppressor (TDS) designed for high-energy EOS protection of single 5V I/O or power lines in USB, industrial, and IoT interfaces. It delivers ±30kV IEC 61000-4-2 ESD immunity, clamps at 7.5V (IPP = 24A), maintains <20mΩ dynamic resistance, and operates from –40°C to +125°C in a 1.6mm × 1.6mm DFN-6 package.
For engineers reviewing the RCLAMP0502B.TCT datasheet, pinout, applications, or equivalent options, key selection criteria include clamping voltage stability across temperature and peak current, low junction capacitance (12pF), ultra-low leakage (<100nA), and compatibility with USB 2.0, HDMI, and industrial serial bus protection layouts.
Technical Context
The RCLAMP0502B.TCT uses a surge-rated FET as its primary protection element, activated by an integrated precision trigger circuit that initiates shunting when transient voltage exceeds breakdown. Unlike conventional TVS diodes, its clamping voltage remains nearly constant over the full rated IPP range due to decreasing RDS(on) under surge conditions.
It supports unsymmetrical line protection with ±1kV IEC 61000-4-5 surge rating (1.2/50μs voltage + 8/20μs current, RS = 42Ω), and achieves ±4kV EFT immunity per IEC 61000-4-4 at 5/50ns pulse width. Its 12pF junction capacitance at VR = 5V enables use on high-speed data lines without signal integrity degradation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 5 V - Matches standard USB 2.0, UART, SPI, and industrial control bus operating voltages. |
| Clamping Voltage (VC) | 7.5 V @ IPP = 24 A (tp = 1.2/50μs + 8/20μs combo wave) - Ensures protected ICs remain below absolute maximum ratings during surge events. |
| ESD Withstand | ±30 kV contact & air (IEC 61000-4-2) - Meets highest-level system-level ESD immunity requirements without external shielding. |
| Junction Capacitance | 12 pF @ VR = 5 V, f = 1 MHz - Low enough for full-speed USB 2.0 (480 Mbps) and RS-485/RS-232 interfaces without signal distortion. |
| Dynamic Resistance | 18 mΩ (measured 1–24 A, tp = 8/20μs) - Enables stable clamping and minimizes voltage overshoot during fast-rising transients. |
| Leakage Current | 80 nA @ VRWM = 5 V - Negligible impact on battery-powered or low-power sensor node standby current budgets. |
| Operating Temperature | –40°C to +125°C - Supports deployment in automotive under-hood, industrial PLC, and outdoor IoT edge nodes. |
Pinout & Package
Package: DFN-6 (1.6 mm × 1.6 mm × 0.55 mm), Pb-free, RoHS/WEEE compliant, UL 94V-0 molding compound, tape-and-reel packaging.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 | GND | Common ground return path for all three shunt paths; must be connected with low-inductance layout (multiple vias recommended). |
| 4, 5, 6 | IN | Parallel-connected input terminals for protected line; all three pins must be tied together externally to maximize surge current handling (40 A capability). |
Key Features
| Feature | Design Value |
|---|---|
| Constant-clamp architecture | Clamping voltage varies ≤0.3 V across 1–24 A surge range - eliminates design margin inflation needed with traditional TVS diodes. |
| FET-based shunt topology | Surge energy dissipated in low-RDS(on) channel instead of PN junction - improves thermal robustness and lifetime reliability under repeated surges. |
| Low-capacitance protection | 12 pF typical - preserves signal rise/fall times on USB 2.0, CAN FD, and industrial Ethernet PHY interfaces. |
| High-temperature stability | Clamping voltage drift <1% from –40°C to +125°C - enables consistent protection in uncontrolled thermal environments. |
| Integrated trigger circuit | Precise VBR threshold (6.2 V typ.) with tight tolerance - ensures activation before protected IC damage thresholds are exceeded. |
Applications
| USB 2.0 Data Lines | Industrial Serial Interfaces |
|---|---|
|
Use Scenario: Protecting D+ and D– lines of USB 2.0 host/device ports against ESD and lightning-induced surges in factory automation controllers. IC Role / Device Role / Timing Role: Primary front-end transient suppressor placed immediately after the USB connector, before series resistors or PHY ICs. Use Value: 12 pF capacitance prevents bit error rate degradation at 480 Mbps; ±30 kV ESD rating eliminates need for secondary board-level shielding. |
Use Scenario: Safeguarding RS-485 transceivers in distributed I/O modules exposed to long cable runs in harsh electrical environments. IC Role / Device Role / Timing Role: Bidirectional line protector on A/B differential pairs, referenced to local ground plane. Use Value: 7.5 V clamping ensures transceiver inputs stay within –7 V to +12 V common-mode range; 40 A surge rating meets IEC 61000-4-5 Level 4. |
| HDMI DDC Channel | IoT Sensor Node Power Input |
|
Use Scenario: Securing the I²C-based Display Data Channel (DDC) lines between GPU and monitor in embedded digital signage systems. IC Role / Device Role / Timing Role: Low-capacitance shunt clamp on SDA/SCL lines, placed adjacent to HDMI connector. Use Value: 12 pF loading avoids timing violations on 100 kHz I²C clock; ±30 kV ESD withstand prevents hot-plug failure during field maintenance. |
Use Scenario: Protecting 5 V power rail of battery-backed environmental sensors deployed outdoors or near motor drives. IC Role / Device Role / Timing Role: Unidirectional rail clamp between input capacitor and load switch, referenced to system GND. Use Value: 5 V working voltage aligns with LDO output; 80 nA leakage extends multi-year battery life; –40°C to +125°C rating covers extended ambient range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPD4E05U06DQAR | Capacitance: 0.5 pF (lower), Clamping: 12 V @ 24 A, ESD: ±12 kV - silicon-germanium process, higher clamping voltage. | Better suited for >1 Gbps differential lines (e.g., USB 3.2 Gen 1), less ideal for 5 V logic-level protection where low VC is critical. | Select when ultra-low capacitance dominates over clamping voltage; not recommended for 5 V rail protection where RCLAMP0502B.TCT's 7.5 V VC provides tighter margin. |
| SP1001-01UTG | Capacitance: 15 pF, Clamping: 14.5 V @ 24 A, ESD: ±30 kV - standard TVS diode architecture, higher RDYN (~1 Ω). | Acceptable for lower-speed interfaces (e.g., RS-232) but exhibits rising VC with temperature and current - requires larger safety margin. | Choose only if cost sensitivity outweighs performance; RCLAMP0502B.TCT offers superior clamping stability and thermal resilience in demanding deployments. |
Compared with TPD4E05U06DQAR and SP1001-01UTG, RCLAMP0502B.TCT uniquely combines sub-8 V clamping, 12 pF capacitance, and flat VC vs. temperature-enabling robust 5 V interface protection without iterative margining or thermal derating.
Availability
RCLAMP0502B.TCT is available at Aetrix Electronics and suitable for USB 2.0 interface protection, industrial RS-485 node hardening, and IoT sensor power rail safeguarding requiring stable component supply across production lifecycles.
Supply support for RCLAMP0502B.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 connectivity.
RCLAMP0502B.TCT belongs to Semtech's RClamp® family of transient suppressors, engineered specifically for high-speed data line and low-voltage power rail protection in consumer, industrial, and automotive electronics.
FAQ
What is the maximum peak pulse current rating for RCLAMP0502B.TCT?
RCLAMP0502B.TCT is rated for 40 A peak pulse current (tp = 8/20 μs) per IEC 61000-4-5, with guaranteed clamping at 7.5 V up to 24 A. This rating assumes proper PCB layout: all three IN pins (4–6) and all three GND pins (1–3) must be connected with low-inductance traces and multiple vias to ground plane. The RCLAMP0502B.TCT datasheet confirms this value under "Absolute Maximum Ratings" and "Electrical Characteristics."
Does RCLAMP0502B.TCT support bidirectional or unidirectional protection?
RCLAMP0502B.TCT provides bidirectional transient suppression, capable of clamping both positive and negative transients on the protected line. Its symmetrical breakdown behavior (VBR = ±6.2 V typ.) and ±30 kV ESD rating per IEC 61000-4-2 confirm true bidirectional operation. This makes RCLAMP0502B.TCT suitable for AC-coupled data lines like USB D+/D– and RS-485 A/B, unlike unidirectional TVS devices requiring polarity-specific placement.
How does RCLAMP0502B.TCT achieve stable clamping voltage across temperature?
RCLAMP0502B.TCT uses a FET-based shunt architecture with a precision trigger circuit, rather than a conventional PN-junction TVS. As surge current increases, the FET's RDS(on) decreases, counteracting voltage rise - resulting in <0.3 V VC variation from –40°C to +125°C. This contrasts with standard TVS diodes whose clamping rises linearly with temperature and current. The RCLAMP0502B.TCT datasheet shows this stability in Figure 3 ("Clamping Voltage vs. Temperature").
Can RCLAMP0502B.TCT be used on USB 3.0 SuperSpeed lanes?
No - RCLAMP0502B.TCT is not recommended for USB 3.0 SuperSpeed (5 Gbps) differential lanes due to its 12 pF junction capacitance, which would degrade signal integrity at multi-GHz frequencies. It is optimized for USB 2.0 (480 Mbps), HDMI DDC, and industrial serial buses. For SuperSpeed protection, Semtech recommends RClamp3371ZC (0.25 pF). Always verify eye diagram compliance when selecting RCLAMP0502B.TCT for high-speed applications.
What is the marking code for RCLAMP0502B.TCT on the physical device?
The top-side marking for RCLAMP0502B.TCT is "R05" followed by a two-digit date code (e.g., "R0523" for week 23 of 2023), with a laser dot indicating Pin 1 location. This matches Semtech's official ordering and marking specification for the part. The RCLAMP0502B.TCT package is a 6-pin DFN (1.6 mm × 1.6 mm), and the marking appears adjacent to Pin 1 in the top-view orientation shown in the datasheet's "Outline Drawing" section.
RCLAMP0502B.TCT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Package/Case:
- SC-75, SOT-416
- Series:
- RailClamp®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Not For New Designs
- Type:
- Zener
- Unidirectional Channels:
- 2
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 5V (Max)
- Voltage - Breakdown (Min):
- 6V
- Voltage - Clamping (Max) @ Ipp:
- 25V
- Current - Peak Pulse (10/1000µs):
- 5A (8/20µs)
- Power - Peak Pulse:
- 125W
- Power Line Protection:
- No
- Applications:
- HDMI, RF Antenna
- Capacitance @ Frequency:
- 1.2pF @ 1MHz
- Operating Temperature:
- -55°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-75 (SOT523)
RCLAMP0502B.TCT FAQ
1.How can I place an order for RCLAMP0502B.TCT through Aetrix?
Please submit a Request for Quotation (RFQ) for RCLAMP0502B.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 RCLAMP0502B.TCT reliable?
The price and inventory of RCLAMP0502B.TCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RCLAMP0502B.TCT is usually 5 days.
3.What payment methods are accepted for RCLAMP0502B.TCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RCLAMP0502B.TCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RCLAMP0502B.TCT?
RCLAMP0502B.TCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RCLAMP0502B.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 RCLAMP0502B.TCT?
For technical support, including RCLAMP0502B.TCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RCLAMP0502B.TCT requirements.
6.How does Aetrix verify that RCLAMP0502B.TCT is sourced from the original manufacturer or authorized distributors?
All RCLAMP0502B.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 RCLAMP0502B.TCT meets industry standards.
7.What is the process for return or replacement of RCLAMP0502B.TCT?
All RCLAMP0502B.TCT units undergo pre-shipment inspection (PSI). If there is an issue with RCLAMP0502B.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 RCLAMP0502B.TCT part is unused and in its original packaging.
Return procedure for RCLAMP0502B.TCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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