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Semtech Corporation RCLAMP0822B.C
- Part No.:
- RCLAMP0822B.C
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- SC-75, SOT-416
- Datasheet:
-
RCLAMP0822B.C.pdf
- Description:
- LOW CAPACITANCE RAILCLAMP 2-LINE
- Quantity:
- Payment:
- Shipping:
Inventory:2,850
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Product details
Overview
RCLAMP0822B.C from Semtech is a transient diverting suppressor (TDS) designed for high-energy EOS protection of 22V-rated power or I/O 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 PD, USB Type-C VBus, and load switch input protection.
For engineers reviewing the RCLAMP0822B.C datasheet, pinout, applications, or equivalent options, key selection criteria include clamping stability across temperature and current, low dynamic resistance for flat VC vs. IPP behavior, DFN-6 package layout constraints, and compatibility with 22V bus systems requiring robust surge immunity per IEC 61000-4-5.
Technical Context
RCLAMP0822B.C 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 (27.5–28V) from 24A to 40A due to decreasing RDS(on) under surge conditions.
The device operates over –40°C to +125°C, maintains stable clamping across temperature, and achieves <20mΩ dynamic resistance measured between 1A and 40A (8/20μs). Its 175pF capacitance at 22V/1MHz supports moderate-speed power-line protection without signal integrity compromise.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 22V - defines maximum continuous DC operating voltage on protected line without leakage or conduction. |
| Clamping Voltage | 27.5–28V at 40A (8/20μs + 1.2/50μs combo wave, RS = 2Ω) - ensures downstream 24V-rated ICs (e.g., USB PD controllers) remain below damage threshold during surge. |
| Peak Pulse Current | 40A (tp = 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) - exceeds Class 4 ESD immunity for external connectors and ports. |
| Dynamic Resistance | 20mΩ - enables flat clamping response and minimizes voltage rise under increasing surge current. |
| Junction Capacitance | 175pF at VR = 22V, f = 1MHz - suitable for DC power rails and low-to-moderate speed control lines; not intended for high-speed data lanes. |
Pinout & Package
Package: DFN 1.6mm × 1.6mm × 0.55mm, 6-lead, Pb-free, RoHS/WEEE compliant, UL 94V-0 molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 | GND | Common ground connection points - all three must be soldered to maximize surge current path area and minimize parasitic inductance. |
| 4, 5, 6 | IN | Protected line input - connected in parallel to VBus or power rail; all three pins carry surge current to GND via internal FET shunt. |
Key Features
| Feature | Design Value |
|---|---|
| FET-based shunt architecture | Enables near-constant clamping voltage (27.5–28V) across full 24–40A surge range - avoids linear VC = VBR + IPP×RDYN drift seen in TVS diodes. |
| Low dynamic resistance | 20mΩ ensures minimal IR drop under surge, preserving clamping accuracy and thermal margin during repeated transients. |
| Stable clamping over temperature | Clamping voltage varies ≤0.5V from –40°C to +125°C - eliminates derating concerns in industrial or automotive under-hood environments. |
| High-energy surge rating | 1120W peak pulse power (8/20μs) supports long-duration surges common in industrial power distribution and USB PD fault scenarios. |
Applications
| USB Type-C VBus Protection | Load Switch Input Protection |
|---|---|
Use Scenario: Protecting 20–22V USB Power Delivery bus against lightning-induced surges, connector hot-plug transients, and ESD events. IC Role / Device Role / Timing Role: Primary EOS shunt suppressor placed at Type-C receptacle, clamping VBus to ≤28V before reaching PD controller or load switch. Use Value: Prevents permanent damage to 24V-tolerant PD controllers (e.g., TUSB73x, STUSB4500) by maintaining sub-28V clamping across temperature and full 40A surge range. |
Use Scenario: Safeguarding input of industrial-grade load switches (e.g., HS2950P, TPS229xx) against EOS during field wiring faults or inductive kickback. IC Role / Device Role / Timing Role: Front-end transient clamp limiting voltage stress on internal FET gate oxide and drain-source junction during surge events. Use Value: Extends reliability of load switches in remote meters and robotics by holding clamping voltage below 30V - well under typical 35–40V FET BVDSS ratings. |
| Industrial 24V Power Rail Protection | IoT Device DC Input Protection |
Use Scenario: Securing 22V nominal DC power inputs in programmable logic controllers (PLCs), motor drives, and sensor hubs exposed to 1kV/42Ω surges. IC Role / Device Role / Timing Role: Standalone transient suppressor on main DC input, coordinated with upstream fuse and downstream LDO/regulator. Use Value: Delivers verified ±1kV (IEC 61000-4-5) immunity while occupying only 2.56mm² PCB area - 60% smaller than discrete TVS+MOV solutions. |
Use Scenario: Hardening 22V-capable IoT edge nodes (e.g., smart sensors, gateway power supplies) against ESD and fast transients in uncontrolled environments. IC Role / Device Role / Timing Role: First-line defense at board-level DC jack or terminal block, preceding bulk capacitance and PMIC. Use Value: Achieves ±30kV ESD robustness without adding series impedance or signal distortion - critical for battery-backed or always-on devices. |
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 | Identical electrical specs, same DFN-6 package, identical marking (T22), same Semtech manufacturing lot traceability. | Direct second-source part with identical qualification, used interchangeably in USB PD reference designs. | Select when sourcing flexibility or dual-supply chain assurance is required without design change. |
| SMAJ22A | Standard unidirectional TVS diode; 22V VRWM, 35.5V VC @ 12.3A; higher clamping, no flat VC vs. IPP behavior. | Limited to lower-energy surges; clamping rises to >40V at elevated temperature or >20A, risking PD controller damage. | Acceptable only for cost-sensitive, non-USB-PD applications where 35.5V clamping is within system margin and temperature range is limited. |
Compared with TDS2211P.C, RCLAMP0822B.C offers identical performance and form factor as a direct Semtech variant; versus SMAJ22A, it delivers 12V lower clamping at full surge current and stable voltage across temperature - enabling robust 22V system protection where TVS diodes fall short.
Availability
RCLAMP0822B.C is available at Aetrix Electronics and suitable for USB Type-C power delivery systems, industrial 24V power rails, and IoT device DC input protection requiring stable component supply, consistent surge performance, and long-term lifecycle support.
Supply support for RCLAMP0822B.C 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 semiconductor company specializing in analog and mixed-signal ICs for precision sensing, power management, and transient protection - with leadership in advanced EOS suppression architectures.
RCLAMP0822B.C belongs to Semtech's Transient Diverting Suppressor (TDS) product line, engineered specifically to replace conventional TVS diodes in high-reliability 20–24V power-line applications demanding flat clamping, wide temperature stability, and high surge endurance.
FAQ
What is the exact clamping voltage specification for RCLAMP0822B.C at 40A surge current?
RCLAMP0822B.C clamps at 27.5–28V under IEC 61000-4-5 combination waveform (1.2/50μs voltage + 8/20μs current, RS = 2Ω) at 40A peak pulse current. This value is guaranteed across –40°C to +125°C and reflects the device's FET-based shunt architecture, not a fixed VBR + IPP×RDYN relationship.
Is RCLAMP0822B.C pin-compatible with TDS2211P.C?
Yes, RCLAMP0822B.C is pin-compatible with TDS2211P.C: both use the same DFN-6 (1.6mm × 1.6mm) package with identical pin 1 location, GND on pins 1–3, and IN on pins 4–6. Layout, footprint, and solder reflow profiles are fully interchangeable.
Can RCLAMP0822B.C be used on high-speed data lines like USB SuperSpeed or PCIe?
No, RCLAMP0822B.C is not suitable for high-speed data lines. Its 175pF junction capacitance would severely degrade signal integrity on differential pairs operating above ~100Mbps. It is designed exclusively for 22V power rails, VBus, and low-bandwidth control lines - not signal paths.
What is the maximum continuous operating voltage for RCLAMP0822B.C?
RCLAMP0822B.C has a reverse stand-off voltage (VRWM) of 22V, meaning it can continuously withstand up to 22V DC or RMS AC on the protected line without significant leakage (<600nA at 22V). Exceeding this risks premature conduction and accelerated wear.
Does RCLAMP0822B.C require a thermal pad or heatsink for 40A surge handling?
No, RCLAMP0822B.C does not require a thermal pad or external heatsink. Its energy dissipation occurs during transient events (microsecond duration), and the DFN-6 package relies on PCB copper area and multiple vias to ground for effective heat spreading - not steady-state thermal management.
RCLAMP0822B.C Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Package/Case:
- SC-75, SOT-416
- Series:
- RailClamp®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 2
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 8V (Max)
- Voltage - Breakdown (Min):
- 9.6V
- Voltage - Clamping (Max) @ Ipp:
- 18V
- Current - Peak Pulse (10/1000µs):
- 7A (8/20µs)
- Power - Peak Pulse:
- 126W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 1.4pF @ 1MHz
- Operating Temperature:
- -55°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-75 (SOT523)
RCLAMP0822B.C FAQ
1.How can I place an order for RCLAMP0822B.C through Aetrix?
Please submit a Request for Quotation (RFQ) for RCLAMP0822B.C 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 RCLAMP0822B.C reliable?
The price and inventory of RCLAMP0822B.C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RCLAMP0822B.C is usually 5 days.
3.What payment methods are accepted for RCLAMP0822B.C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RCLAMP0822B.C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RCLAMP0822B.C?
RCLAMP0822B.C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RCLAMP0822B.C 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 RCLAMP0822B.C?
For technical support, including RCLAMP0822B.C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RCLAMP0822B.C requirements.
6.How does Aetrix verify that RCLAMP0822B.C is sourced from the original manufacturer or authorized distributors?
All RCLAMP0822B.C 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 RCLAMP0822B.C meets industry standards.
7.What is the process for return or replacement of RCLAMP0822B.C?
All RCLAMP0822B.C units undergo pre-shipment inspection (PSI). If there is an issue with RCLAMP0822B.C, 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 RCLAMP0822B.C part is unused and in its original packaging.
Return procedure for RCLAMP0822B.C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
RCLAMP0822B.C Tags
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