My Inquiry
My Account
Semtech Corporation RCLAMP1521PQTCT
- Part No.:
- RCLAMP1521PQTCT
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- 0402 (1006 Metric)
- Datasheet:
-
RCLAMP1521PQTCT.pdf
- Description:
- TVS DIODE 15VWM 35VC SLP1006P2
- Quantity:
- Payment:
- Shipping:
Inventory:12,085
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
RCLAMP1521PQTCT from Semtech is a transient diverting suppressor (TDS) designed for high-energy EOS protection of 15V-rated I/O or power lines in USB Type-C, USB PD, and industrial interfaces. It delivers ±30kV IEC 61000-4-2 ESD immunity, 40A peak pulse current (8/20μs), 27.5–28V clamping voltage at 40A, and operates from –40°C to +125°C in a DFN 1.6×1.6×0.55mm 6-lead package.
For engineers reviewing the RCLAMP1521PQTCT datasheet, pinout, applications, or equivalent options, key selection criteria include clamping stability across temperature and current, low dynamic resistance (20mΩ), junction capacitance (175pF), and compatibility with 15V bus systems requiring robust surge suppression without voltage derating.
Technical Context
RCLAMP1521PQTCT 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 and across –40°C to +125°C due to decreasing RDS(on) under surge conditions.
The device protects one line with three parallel input terminals (pins 4–6) and three ground terminals (pins 1–3), requiring all six pins to be connected for full 40A rating. Its functional architecture enables stable energy diversion without thermal runaway, making it suitable for high-reliability 15V bus protection where traditional TVS devices exhibit rising clamping voltage with temperature and current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 15 V - Maximum continuous DC operating voltage on protected line without leakage or conduction. |
| Clamping Voltage | 27.5–28 V at 40A (8/20μs + 1.2/50μs combo waveform) - Ensures downstream 15V ICs remain below absolute maximum ratings during surge events. |
| Peak Pulse Current | 40 A (tp = 8/20μs) - Meets IEC 61000-4-5 Level 4 industrial surge immunity requirements for 15V systems. |
| ESD Withstand | ±30 kV contact & air (IEC 61000-4-2) - Provides robust handling of human-body-model ESD events in portable and connector-facing designs. |
| Dynamic Resistance | 20 mΩ - Enables low-voltage drop during high-current transients, minimizing power dissipation and thermal stress. |
| Junction Capacitance | 175 pF at 15V, 1MHz - Compatible with medium-speed data lines (e.g., USB 2.0, CC/SBU, load switch control) without signal integrity degradation. |
Pinout & Package
Package: DFN 1.6 mm × 1.6 mm × 0.55 mm, 6-lead, Pb-free, RoHS/WEEE compliant, UL 94V-0 molding compound.
| 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 | Parallel-connected input terminals for protected line; all three required to achieve full 40A rating and optimal clamping performance. |
Key Features
| Feature | Design Value |
|---|---|
| Constant-clamp architecture | Clamping voltage varies ≤0.5 V from 24A to 40A and remains stable across –40°C to +125°C - eliminates design margin uncertainty vs. TVS diodes. |
| Surge-rated FET protection element | Replaces pn-junction TVS with low-RDS(on) shunt switch - dissipates energy in channel rather than junction, improving reliability under repeated surges. |
| Low dynamic resistance | 20 mΩ - reduces voltage overshoot during fast-rising transients and minimizes localized heating during multi-pulse events. |
| High EFT immunity | ±4 kV per IEC 61000-4-4 (5/50 ns, 5 kHz & 100 kHz bursts) - protects against repetitive electrical fast transients common in industrial motor drives and PLCs. |
Applications
| USB Type-C Power Delivery Bus Protection | Industrial Load Switch Input Protection |
|---|---|
Use Scenario: Protecting the VBUS line in USB Type-C ports supporting up to 20V PD negotiation, where transient overvoltage could damage PD controllers or e-fuses. IC Role / Device Role / Timing Role: Transient diverting suppressor placed directly at the connector, clamping surges before they reach the PD controller or load switch. Use Value: Maintains 27.5–28V clamping at 40A and across temperature - ensures PD controller stays within 30V absolute max rating even at 125°C ambient. |
Use Scenario: Safeguarding the input of industrial-grade load switches (e.g., HS2950P) exposed to lightning-induced surges in remote meters, robotics, or factory automation. IC Role / Device Role / Timing Role: Primary front-end surge protector on the VIN rail, limiting voltage seen by the load switch's internal FET gate oxide and drain-source junction. Use Value: Prevents catastrophic failure of the load switch by holding clamping voltage well below its 30V breakdown threshold under 40A surge conditions. |
| IoT Sensor Node Power Rail Protection | 15V Industrial Control Interface Protection |
Use Scenario: Securing the 15V supply rail of battery-backed IoT edge nodes deployed outdoors or near EMI sources, subject to ESD and induced surges. IC Role / Device Role / Timing Role: Standalone EOS protector on the main power input, coordinated with upstream fusing and downstream LDOs. Use Value: Delivers ±30kV ESD immunity and 40A surge capability in 1.6×1.6mm footprint - enables compact, ruggedized enclosure designs without external heatsinking. |
Use Scenario: Protecting 15V logic-level control inputs (e.g., enable, fault, or configuration lines) in programmable logic controllers (PLCs) and HMI panels. IC Role / Device Role / Timing Role: Point-of-use suppressor on discrete control signals routed through long cables or terminal blocks susceptible to coupling. Use Value: 175pF capacitance avoids signal distortion on <10 MHz control lines, while 27.5V clamping prevents latch-up or damage to 15V-tolerant GPIOs. |
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 at 40A, same DFN 1.6×1.6mm package | Designed for 22V bus systems (e.g., USB PD up to 20V + margin); higher VRWM may cause leakage concerns on 15V rails | Select when protecting 20–22V systems; verify reverse leakage (600nA max at 22V) does not impact 15V bias networks. |
| RCLAMP0521PQTCT | 5V working voltage, 12V clamping at 24A, identical pinout and package | Optimized for 3.3V/5V data lines (USB 2.0, HDMI, DisplayPort); insufficient VRWM for 15V bus use | Not suitable as direct replacement; only applicable for sub-6V interfaces requiring lower clamping voltage. |
Compared with TDS2211P and RCLAMP0521PQTCT, RCLAMP1521PQTCT uniquely balances 15V system compatibility, 27.5V clamping headroom, and 40A surge capability in a space-constrained DFN - enabling reliable protection where 5V suppressors lack voltage rating and 22V variants risk excessive leakage.
Availability
RCLAMP1521PQTCT is available at Aetrix Electronics and suitable for USB Type-C PD implementations, industrial load switch inputs, and 15V IoT power rail protection requiring stable component supply, consistent parametric performance, and long-term lifecycle support.
Supply support for RCLAMP1521PQTCT 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 high-performance analog and mixed-signal semiconductors for power management, protection, sensing, and connectivity applications.
RCLAMP1521PQTCT belongs to Semtech's Transient Diverting Suppressor (TDS) product line, engineered to replace conventional TVS diodes in high-reliability 12–15V industrial, computing, and USB interface protection where stable clamping and temperature insensitivity are critical.
FAQ
What is the maximum continuous operating voltage for RCLAMP1521PQTCT?
RCLAMP1521PQTCT has a reverse stand-off voltage (VRWM) of 15 V, meaning it can continuously block up to 15 V DC without significant leakage or conduction. This makes it suitable for 12 V and 15 V nominal power rails, including USB PD auxiliary power paths and industrial control inputs where sustained voltage must remain within safe limits.
How does RCLAMP1521PQTCT differ from standard TVS diodes in clamping behavior?
Unlike standard TVS diodes whose clamping voltage rises linearly with peak pulse current (VC = VBR + IPP × RDYN), RCLAMP1521PQTCT uses a surge-rated FET and precision trigger circuit to maintain clamping voltage between 27.5 V and 28 V across its full 24–40 A rating and from –40°C to +125°C - eliminating design margin uncertainty in thermally demanding environments.
Can RCLAMP1521PQTCT be used to protect USB 2.0 data lines?
No - RCLAMP1521PQTCT is not recommended for USB 2.0 data lines due to its 175 pF junction capacitance, which would degrade signal integrity at 480 Mbps. It is intended for power or lower-speed control lines (e.g., CC, SBU, enable, fault). For USB 2.0 differential pairs, Semtech recommends low-capacitance devices like RClamp3371ZC (<0.25 pF).
What is the recommended PCB layout for RCLAMP1521PQTCT to achieve full 40A surge rating?
To achieve the full 40A rating, all three IN pins (4, 5, 6) must be connected via a single low-inductance trace to the protected line, and all three GND pins (1, 2, 3) must connect to a solid ground plane using multiple vias. Placement must be adjacent to the connector - not near downstream ICs - to minimize coupled energy and ensure transient current flows directly to ground.
Is RCLAMP1521PQTCT compatible with lead-free reflow soldering processes?
Yes - RCLAMP1521PQTCT is Pb-free, halogen-free, and RoHS/WEEE compliant, qualified for standard JEDEC J-STD-020 lead-free reflow profiles with peak temperatures up to 260°C. Its DFN 1.6×1.6mm package supports automated assembly and meets IPC-A-610 Class 2 and Class 3 acceptance criteria.
RCLAMP1521PQTCT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Package/Case:
- 0402 (1006 Metric)
- Series:
- RailClamp®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 15V (Max)
- Voltage - Breakdown (Min):
- 16.7V
- Voltage - Clamping (Max) @ Ipp:
- 35V
- Current - Peak Pulse (10/1000µs):
- 4A (8/20µs)
- Power - Peak Pulse:
- 120W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- 0.3pF @ 1MHz
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SLP1006P2
RCLAMP1521PQTCT FAQ
1.How can I place an order for RCLAMP1521PQTCT through Aetrix?
Please submit a Request for Quotation (RFQ) for RCLAMP1521PQTCT 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 RCLAMP1521PQTCT reliable?
The price and inventory of RCLAMP1521PQTCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RCLAMP1521PQTCT is usually 5 days.
3.What payment methods are accepted for RCLAMP1521PQTCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RCLAMP1521PQTCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RCLAMP1521PQTCT?
RCLAMP1521PQTCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RCLAMP1521PQTCT 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 RCLAMP1521PQTCT?
For technical support, including RCLAMP1521PQTCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RCLAMP1521PQTCT requirements.
6.How does Aetrix verify that RCLAMP1521PQTCT is sourced from the original manufacturer or authorized distributors?
All RCLAMP1521PQTCT 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 RCLAMP1521PQTCT meets industry standards.
7.What is the process for return or replacement of RCLAMP1521PQTCT?
All RCLAMP1521PQTCT units undergo pre-shipment inspection (PSI). If there is an issue with RCLAMP1521PQTCT, 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 RCLAMP1521PQTCT part is unused and in its original packaging.
Return procedure for RCLAMP1521PQTCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
RCLAMP1521PQTCT Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
