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Semtech Corporation RCLAMP1255P.TGT
- Part No.:
- RCLAMP1255P.TGT
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- 6-UFDFN Exposed Pad
- Datasheet:
-
RCLAMP1255P.TGT.pdf
- Description:
- TVS DIODE 4VWM 12.5VC SLP2018P6
- Quantity:
- Payment:
- Shipping:
Inventory:6,497
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Product details
Overview
RCLAMP1255P.TGT from Semtech is a transient diverting suppressor designed for high-energy EOS/ESD protection of 12V-rated data or power lines in USB Type-C, USB PD, and industrial I/O interfaces. It delivers ±30kV IEC 61000-4-2 ESD immunity, clamps at 14.5V (IPP = 24A), maintains <20mΩ dynamic resistance, and operates from –40°C to +125°C in a 1.6 × 1.6 mm DFN-6 package.
For engineers reviewing the RCLAMP1255P.TGT datasheet, pinout, applications, or equivalent options, key selection criteria include clamping voltage stability across temperature, low capacitance (175 pF @ 12V), peak pulse current rating (40A), and compatibility with 12V bus protection in compact USB-C and IoT designs.
Technical Context
RCLAMP1255P.TGT 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 (14.5–14.8V) from IPP = 24A to 40A due to decreasing RDS(on) under surge conditions.
The device features three parallel input terminals (pins 4–6) and three ground terminals (pins 1–3), enabling low-inductance PCB layout with distributed current sharing. Its functional architecture decouples trigger threshold (VBR ≈ 15.5V) from clamping behavior, delivering stable protection without thermal derating penalties typical of junction-based TVS devices.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage (VRWM) | 12 V - Maximum continuous DC or RMS operating voltage before clamping initiates. |
| Clamping Voltage (VC) | 14.5 V @ IPP = 24A - Peak voltage seen by protected IC during 8/20μs surge; ensures safe margin below 15V logic or USB PD controller limits. |
| Peak Pulse Current (IPP) | 40 A @ 8/20μs - Sustains industrial-level surge events per IEC 61000-4-5 without failure. |
| ESD Withstand | ±30 kV contact & air - Meets highest IEC 61000-4-2 Level 4 requirement for user-accessible ports. |
| Junction Capacitance (CJ) | 175 pF @ VR = 12 V - Low enough to avoid signal integrity degradation on USB 2.0 or 10/100 Ethernet lines. |
| Dynamic Resistance (RDYN) | 20 mΩ - Enables flat clamping curve; reduces voltage overshoot during fast-rising transients. |
Pinout & Package
Package: DFN-6, 1.6 mm × 1.6 mm × 0.55 mm, thermally enhanced with exposed pad (not electrically connected), RoHS-compliant, UL 94V-0 molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pins 1, 2, 3 | Ground (GND) | Three dedicated low-inductance ground paths; all must be connected to maximize surge current handling and minimize ground bounce. |
| Pins 4, 5, 6 | Input (IN) | Parallel-connected protected line terminals; enables uniform current division and reduced trace inductance in high-speed interface layouts. |
Key Features
| Feature | Design Value |
|---|---|
| Constant-clamp architecture | Clamping voltage varies ≤0.3 V across full 24–40 A surge range-enables predictable protection without overdesign. |
| Temperature-stable clamping | Clamps at 14.5–14.8 V from –40°C to +125°C-eliminates thermal derating calculations required for standard TVS diodes. |
| Low dynamic resistance | 20 mΩ RDYN minimizes IR drop during surge, preserving low-voltage margin for 12V systems. |
| High-energy capability | 1120 W peak pulse power supports repeated lightning-surge testing per IEC 61000-4-5 without parametric shift. |
Applications
| USB Type-C Power Delivery Bus Protection | Industrial I/O Port Protection |
|---|---|
Use Scenario: Protecting VCONN, VBUS, or CC lines in USB-C receptacles where nominal voltage reaches 12V and ESD exposure is frequent. IC Role / Device Role / Timing Role: Transient diverting suppressor placed directly at connector entry point to shunt EOS energy before reaching PD controller or load switch. Use Value: Maintains 14.5V clamping across temperature-prevents false overvoltage shutdowns in automotive or outdoor enclosures where ambient exceeds 85°C. | Use Scenario: Securing analog sensor inputs or digital control lines in PLC modules exposed to field wiring surges and EFT noise. IC Role / Device Role / Timing Role: Primary front-end protection element on 12V supply rails feeding isolated ADCs or CAN transceivers. Use Value: 40A surge rating meets IEC 61000-4-5 Level 3 requirements; 175 pF capacitance avoids loading 10 kHz–1 MHz signal bandwidths. |
| Load Switch Input Protection | IoT Device USB 2.0 Data Line Protection |
Use Scenario: Safeguarding enable or input pins of high-side load switches (e.g., HS2950P) against accidental 12V shorts or inductive kickback. IC Role / Device Role / Timing Role: Clamping device placed between connector and load switch VIN pin to limit transient voltage below FET gate oxide rating. Use Value: 20 mΩ RDYN ensures sub-1V overshoot during 100 ns rise-time transients-protects gate oxide integrity without external series resistance. | Use Scenario: Shielding D+ and D− lines in battery-powered smart sensors or wearables with micro-USB or USB-C connectors. IC Role / Device Role / Timing Role: Bidirectional ESD clamp integrated into USB 2.0 differential pair routing near port. Use Value: 175 pF total capacitance adds <0.5% signal distortion at 480 Mbps-meets USB-IF eye diagram compliance without equalization. |
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, 27.5V clamping @ 24A, same DFN-6 footprint but higher VRWM and VC | Targeted for 20–22V USB PD bus protection, not suitable for 12V logic rails without overvoltage risk | Select RCLAMP1255P.TGT for 12V systems requiring tight clamping margin; TDS2211P requires redesign if VRWM exceeds system max. |
| RClamp0524P.TCT | 5V working voltage, 12V clamping @ 24A, identical package but lower VRWM and CJ = 120 pF | Optimized for 3.3V/5V I/O like HDMI or PCIe; insufficient standoff for 12V bus operation | Use RClamp0524P.TCT only where system VRWM ≤ 5.5V; RCLAMP1255P.TGT provides necessary 12V headroom with robust 40A surge rating. |
Compared with TDS2211P and RClamp0524P.TCT, RCLAMP1255P.TGT uniquely balances 12V working voltage, 14.5V clamping, and 40A surge capacity in a space-constrained DFN-6-making it the only validated option for 12V USB-C, industrial 12V I/O, and load-switch input protection without voltage-margin compromise.
Availability
RCLAMP1255P.TGT is available at Aetrix Electronics and suitable for USB Type-C power delivery interfaces, industrial programmable logic controllers, and IoT edge node designs requiring stable component supply and long-term lifecycle support.
Supply support for RCLAMP1255P.TGT 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 protection, signal integrity, and wireless infrastructure.
RCLAMP1255P.TGT belongs to Semtech's RClamp® transient protection family-engineered specifically for high-reliability, low-clamp EOS suppression in next-generation USB, industrial, and automotive connectivity systems.
FAQ
What is the maximum continuous operating voltage for RCLAMP1255P.TGT?
The RCLAMP1255P.TGT has a reverse stand-off voltage (VRWM) of 12 V, meaning it can safely operate continuously at up to 12 V DC or RMS without initiating clamping. This makes RCLAMP1255P.TGT ideal for protecting 12V power rails and interfaces such as USB-C VCONN or industrial sensor inputs where system voltage remains within this range.
How does RCLAMP1255P.TGT achieve stable clamping voltage across temperature?
RCLAMP1255P.TGT achieves stable clamping by using a surge-rated FET architecture instead of a PN-junction TVS. Its trigger circuit activates the low-RDS(on) FET shunt path, resulting in clamping voltage that stays within 14.5–14.8 V from –40°C to +125°C. This eliminates thermal derating needed for traditional TVS diodes and ensures consistent protection in RCLAMP1255P.TGT-based designs deployed in harsh environments.
Can RCLAMP1255P.TGT be used on high-speed USB 2.0 data lines?
Yes, RCLAMP1255P.TGT is suitable for USB 2.0 D+/D− lines due to its 175 pF junction capacitance at 12 V reverse bias-low enough to preserve signal integrity at 480 Mbps without violating USB-IF eye mask requirements. When placed close to the connector with symmetric layout, RCLAMP1255P.TGT provides robust ±30 kV ESD protection without equalization or re-timing overhead.
What is the recommended PCB layout for optimal performance of RCLAMP1255P.TGT?
For optimal RCLAMP1255P.TGT performance, connect all three GND pins (1–3) and all three IN pins (4–6) with short, wide traces to minimize inductance. Place RCLAMP1255P.TGT within 3 mm of the protected connector. Use ≥4 vias per GND pin to the ground plane, and avoid thermal relief on GND pads. This layout ensures full 40A surge current sharing and preserves the device's low dynamic resistance advantage.
Does RCLAMP1255P.TGT meet IEC 61000-4-5 surge immunity standards?
Yes, RCLAMP1255P.TGT is rated for 40 A peak pulse current under the 8/20 μs waveform per IEC 61000-4-5, supporting Level 3 (±1 kV, RS = 42 Ω) and Level 4 (±2 kV) surge testing when properly laid out. Its 1120 W peak pulse power rating and constant-clamp behavior ensure reliable pass/fail repeatability-making RCLAMP1255P.TGT a validated solution for industrial equipment and outdoor IoT deployments.
RCLAMP1255P.TGT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Package/Case:
- 6-UFDFN Exposed Pad
- Series:
- RailClamp®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Steering (Rail to Rail)
- Unidirectional Channels:
- 3
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 4V (Max)
- Voltage - Breakdown (Min):
- 4.5V
- Voltage - Clamping (Max) @ Ipp:
- 12.5V
- Current - Peak Pulse (10/1000µs):
- 3A (8/20µs)
- Power - Peak Pulse:
- 40W
- Power Line Protection:
- Yes
- Applications:
- USB OTG
- Capacitance @ Frequency:
- 0.35pF @ 1MHz
- Operating Temperature:
- -55°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SLP2018P6
RCLAMP1255P.TGT FAQ
1.How can I place an order for RCLAMP1255P.TGT through Aetrix?
Please submit a Request for Quotation (RFQ) for RCLAMP1255P.TGT 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 RCLAMP1255P.TGT reliable?
The price and inventory of RCLAMP1255P.TGT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RCLAMP1255P.TGT is usually 5 days.
3.What payment methods are accepted for RCLAMP1255P.TGT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RCLAMP1255P.TGT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RCLAMP1255P.TGT?
RCLAMP1255P.TGT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RCLAMP1255P.TGT 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 RCLAMP1255P.TGT?
For technical support, including RCLAMP1255P.TGT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RCLAMP1255P.TGT requirements.
6.How does Aetrix verify that RCLAMP1255P.TGT is sourced from the original manufacturer or authorized distributors?
All RCLAMP1255P.TGT 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 RCLAMP1255P.TGT meets industry standards.
7.What is the process for return or replacement of RCLAMP1255P.TGT?
All RCLAMP1255P.TGT units undergo pre-shipment inspection (PSI). If there is an issue with RCLAMP1255P.TGT, 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 RCLAMP1255P.TGT part is unused and in its original packaging.
Return procedure for RCLAMP1255P.TGT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
RCLAMP1255P.TGT Tags
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