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Semtech Corporation RCLAMP0551PQTCT
- Part No.:
- RCLAMP0551PQTCT
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- 0402 (1006 Metric)
- Datasheet:
-
RCLAMP0551PQTCT.pdf
- Description:
- 1-LINE 5V 0.50PF 1.3R ESD SLP100
- Quantity:
- Payment:
- Shipping:
Inventory:7,154
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Product details
Overview
RCLAMP0551PQTCT from Semtech is a transient diverting suppressor (TDS) designed for high-energy EOS protection of 22V-rated I/O or power lines, featuring ±30kV IEC 61000-4-2 ESD immunity, 40A peak pulse current (8/20μs), 27.5–28V clamping voltage at 40A, 20mΩ dynamic resistance, and 175pF junction capacitance - deployed in USB Type-C PD bus protection and load switch input safeguarding.
For engineers reviewing the RCLAMP0551PQTCT datasheet, pinout, applications, or equivalent options, key selection criteria include clamping voltage stability across temperature and current, low dynamic resistance for flat VC response, DFN-6 package layout constraints, and compatibility with 22V operating voltage systems requiring industrial-grade surge immunity.
Technical Context
RCLAMP0551PQTCT employs 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 threshold. Unlike conventional TVS diodes, its clamping voltage remains nearly constant (27.5–28V) from 24A to 40A due to decreasing RDS(on) under surge conditions.
The device operates over –40°C to +125°C, maintains stable 22V reverse stand-off voltage and 25–27.9V breakdown voltage, and delivers <600nA leakage at VRWM. Its 175pF capacitance at 22V/1MHz and 20mΩ dynamic resistance are optimized for high-speed data line and power rail protection without signal integrity degradation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reverse Stand-Off Voltage | 22V - defines maximum continuous operating voltage before clamping activation on protected line |
| Clamping Voltage (40A, 8/20μs) | 27.5–28V - ensures downstream 22V-rated ICs (e.g., USB PD controllers) remain below damage threshold during worst-case surges |
| Peak Pulse Current | 40A (8/20μs) - meets IEC 61000-4-5 Level 4 industrial surge immunity requirements for 22V systems |
| ESD Withstand | ±30kV contact & air (IEC 61000-4-2) - provides robust handling of human-body-model and system-level ESD events |
| Dynamic Resistance | 20mΩ - enables flat clamping response and minimizes voltage overshoot during fast-rising transients |
| Junction Capacitance | 175pF @ 22V, 1MHz - low enough to avoid signal distortion on USB Type-C VBUS and load switch control lines |
Pinout & Package
Package: DFN-6 (1.6mm × 1.6mm × 0.55mm), Pb-free, RoHS/WEEE compliant, UL 94V-0 molding compound, tape-and-reel packaging.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pins 1, 2, 3 | GND | Common ground return path for surge current; all three must be connected to maximize current sharing and minimize parasitic inductance |
| Pins 4, 5, 6 | IN | Protected line input (e.g., VBUS); parallel connection of all three pins ensures uniform current distribution and full 40A rating |
Key Features
| Feature | Design Value |
|---|---|
| Constant clamping voltage across IPP range | 27.5–28V from 24A to 40A - eliminates design margin inflation needed with conventional TVS diodes |
| Stable clamping over temperature | No increase in VC from –40°C to +125°C - enables reliable protection in industrial and automotive ambient conditions |
| Low dynamic resistance | 20mΩ - reduces IR drop during surge, maintaining tight voltage control at high current |
| High EFT immunity | ±4kV per IEC 61000-4-4 (5/50ns, 5kHz & 100kHz) - protects against repetitive burst noise in motor drives and PLC environments |
Applications
| USB Type-C Power Delivery Bus Protection | Load Switch Input Protection |
|---|---|
Use Scenario: Protecting VBUS lines in USB Type-C connectors supporting up to 20V PD negotiation and 22V fault tolerance. IC Role / Device Role / Timing Role: Transient diverting suppressor placed directly at connector entry point to clamp lightning-induced surges and ESD before reaching PD controller or e-fuse. Use Value: Maintains 27.5–28V clamping at 40A while operating up to +125°C - prevents false shutdown or latch-up in high-temperature notebooks and docking stations. |
Use Scenario: Safeguarding input terminals of industrial load switches (e.g., HS2950P) exposed to field wiring transients in remote meters and robotics. IC Role / Device Role / Timing Role: Primary EOS shunt device limiting voltage across internal FET gate-source and drain-source during 1.2/50μs surge events. Use Value: 20mΩ dynamic resistance ensures <0.8V IR drop at 40A, keeping stress on load switch silicon well below absolute maximum ratings. |
| Industrial IoT Sensor Hub Power Rail | Automotive Infotainment USB Charging Port |
Use Scenario: Securing 22V auxiliary power rails feeding sensor fusion modules and wireless gateways in factory automation nodes. IC Role / Device Role / Timing Role: High-energy transient suppressor co-located with DC-DC input filter to absorb coupled surges from adjacent AC/DC supplies or relay coils. Use Value: ±30kV ESD rating and 40A surge capability meet IEC 61000-4-5/4-2 requirements for Class A industrial equipment without derating. |
Use Scenario: Protecting 12–22V USB charging ports in vehicle infotainment head units subject to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Secondary surge suppression stage after front-end TVS, handling residual energy that bypasses bulk clamping. Use Value: Stable 27.5–28V clamping across –40°C to +125°C ensures consistent protection during cold cranking and under-hood thermal cycling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TDS2211P.C | Same die, identical electrical specs, DFN-6 package; differs only in marking code and reel quantity (3,000 pcs vs. 1,000 pcs for RCLAMP0551PQTCT) | Identical use cases - USB PD, load switch, industrial 22V rail protection | Select TDS2211P.C for volume procurement where tape-and-reel standardization simplifies SMT line setup |
| uClamp2411ZA | 24V working voltage, lower 24A IPP rating, higher 32V clamping, smaller 1.0mm × 0.6mm DFN-2 package | Better suited for CC/SBU lines in USB Type-C; not rated for 40A surges or VBUS-level protection | Choose uClamp2411ZA only for low-capacitance, space-constrained auxiliary signal lines - not as direct replacement for RCLAMP0551PQTCT's VBUS role |
Compared with TDS2211P.C, RCLAMP0551PQTCT offers identical protection performance but different packaging logistics; versus uClamp2411ZA, it delivers 67% higher surge current capacity and 5V lower clamping - making it the sole suitable option for 22V power rail EOS hardening.
Availability
RCLAMP0551PQTCT is available at Aetrix Electronics and suitable for USB Type-C PD systems, industrial load switch inputs, and 22V IoT power rail designs requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for RCLAMP0551PQTCT 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.
RCLAMP0551PQTCT belongs to Semtech's Transient Diverting Suppressor (TDS) product line, engineered to replace conventional TVS diodes in high-reliability 22V power and interface protection where flat clamping and temperature stability are critical.
FAQ
What is the primary protection function of RCLAMP0551PQTCT?
RCLAMP0551PQTCT functions as a transient diverting suppressor that shunts high-energy EOS events-such as ESD, lightning-induced surges, and EFT bursts-to ground using a precision-triggered FET. Unlike TVS diodes, it maintains a near-constant 27.5–28V clamping voltage across its full 40A rating and operating temperature range, ensuring predictable protection for 22V systems like USB PD buses and load switch inputs.
Does RCLAMP0551PQTCT require external bias or control signals to operate?
No, RCLAMP0551PQTCT is a fully passive, self-triggering device. Its internal precision trigger circuit activates the shunt FET automatically when transient voltage exceeds the breakdown threshold (~25–27.9V). There are no enable pins, configuration registers, or external components required - RCLAMP0551PQTCT operates immediately upon installation in-circuit.
Can RCLAMP0551PQTCT be used on high-speed data lines such as USB SuperSpeed differential pairs?
No, RCLAMP0551PQTCT is not intended for high-speed data lines. With 175pF junction capacitance, it would severely degrade signal integrity on SSTX+/SSTX− or SSRX+/SSRX− lanes. For those lines, Semtech recommends ultra-low-capacitance devices like RClamp3371ZC (<0.25pF). RCLAMP0551PQTCT is specifically designed for VBUS, power rails, and control lines where bandwidth is not critical.
How does RCLAMP0551PQTCT's clamping behavior differ from standard TVS diodes?
RCLAMP0551PQTCT uses a surge-rated FET instead of a pn-junction, resulting in dynamic resistance as low as 20mΩ. This yields flat clamping voltage (27.5–28V) from 24A to 40A and across –40°C to +125°C. In contrast, standard TVS diodes exhibit linear VC = VBR + IPP × RDYN behavior - causing clamping to rise with current and temperature, often exceeding safe limits for 22V ICs under worst-case conditions.
What PCB layout practices are essential for optimal performance of RCLAMP0551PQTCT?
For RCLAMP0551PQTCT, all three IN pins (4,5,6) and all three GND pins (1,2,3) must be shorted together with minimum-length, wide copper traces. Place the device within 2mm of the protected connector. Use multiple vias from GND pins to inner-layer ground planes to reduce inductance. Avoid thermal relief on GND pads - solid copper connections are mandatory to sustain 40A surge current without voltage overshoot.
RCLAMP0551PQTCT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Package/Case:
- 0402 (1006 Metric)
- Series:
- RailClamp®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- -
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 5V (Max)
- Voltage - Breakdown (Min):
- 6V
- Voltage - Clamping (Max) @ Ipp:
- 15V
- Current - Peak Pulse (10/1000µs):
- 3A (8/20µs)
- Power - Peak Pulse:
- 45W
- Power Line Protection:
- No
- Applications:
- HDMI, USB
- Capacitance @ Frequency:
- 0.45pF @ 1MHz
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- Automotive
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SLP1006P2
RCLAMP0551PQTCT FAQ
1.How can I place an order for RCLAMP0551PQTCT through Aetrix?
Please submit a Request for Quotation (RFQ) for RCLAMP0551PQTCT 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 RCLAMP0551PQTCT reliable?
The price and inventory of RCLAMP0551PQTCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RCLAMP0551PQTCT is usually 5 days.
3.What payment methods are accepted for RCLAMP0551PQTCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RCLAMP0551PQTCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RCLAMP0551PQTCT?
RCLAMP0551PQTCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RCLAMP0551PQTCT 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 RCLAMP0551PQTCT?
For technical support, including RCLAMP0551PQTCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RCLAMP0551PQTCT requirements.
6.How does Aetrix verify that RCLAMP0551PQTCT is sourced from the original manufacturer or authorized distributors?
All RCLAMP0551PQTCT 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 RCLAMP0551PQTCT meets industry standards.
7.What is the process for return or replacement of RCLAMP0551PQTCT?
All RCLAMP0551PQTCT units undergo pre-shipment inspection (PSI). If there is an issue with RCLAMP0551PQTCT, 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 RCLAMP0551PQTCT part is unused and in its original packaging.
Return procedure for RCLAMP0551PQTCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
RCLAMP0551PQTCT Tags
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