Semtech Corporation RCLAMP0582BQTCT

Overview

RCLAMP0582BQTCT from Semtech is a transient diverting suppressor (TDS) designed for high-energy EOS/ESD 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, 175pF junction capacitance, and DFN-6 (1.6 × 1.6 × 0.55 mm) packaging - deployed in USB Type-C PD input protection and industrial load switch front-end circuits.

For engineers reviewing the RCLAMP0582BQTCT datasheet, pinout, applications, or equivalent options, key selection considerations include its constant-clamp behavior across temperature and current, low dynamic resistance (20 mΩ), FET-based shunt architecture, and compatibility with 22V bus systems requiring robust surge resilience without voltage derating.

Technical Context

RCLAMP0582BQTCT implements a precision-triggered, surge-rated MOSFET as its primary protection element - unlike conventional TVS diodes - enabling near-constant clamping voltage (27.5–28V) over 24–40A peak pulse current and −40°C to +125°C operating temperature. Its trigger circuit activates the shunt FET when transient voltage exceeds breakdown, minimizing V_C drift.

The device uses a 6-pin DFN package with three dedicated IN terminals (pins 4–6) and three GND terminals (pins 1–3), requiring all six pins to be connected for full 40A surge rating. Its 175pF capacitance at 22V/1MHz and 130–600nA leakage support high-speed interfaces where signal integrity must coexist with robust EOS suppression.

Key Specifications

Pinout & Package

Package: DFN-6 (1.6 mm × 1.6 mm × 0.55 mm), RoHS-compliant, UL 94V-0 molding compound, tape-and-reel packaging (3,000 pcs/reel).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar transient suppression applications.

Compared with TDS2211P.C (pin-identical, spec-matched alternative) and uClamp2411ZA.TCT (lower-power, different topology), RCLAMP0582BQTCT uniquely delivers 40A surge handling with temperature-stable 27.5–28V clamping in a validated 22V system protection role - making it irreplaceable for high-reliability power rail applications demanding consistent performance across environmental extremes.

Availability

RCLAMP0582BQTCT is available at Aetrix Electronics and suitable for USB Type-C PD interface protection, industrial load switch input hardening, and IoT device 22V power rail safeguarding requiring stable component supply, long-term lifecycle assurance, and full compliance documentation.

Supply support for RCLAMP0582BQTCT 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 high-performance analog and mixed-signal semiconductors for power management, protection, sensing, and connectivity.

RCLAMP0582BQTCT belongs to Semtech's Transient Diverting Suppressor (TDS) product line - engineered to replace conventional TVS diodes in high-energy EOS applications where stable clamping, temperature independence, and high peak current capability are mandatory.

FAQ

What is the primary protection function of RCLAMP0582BQTCT?

RCLAMP0582BQTCT functions as a transient diverting suppressor that shunts high-energy EOS/ESD events to ground using an integrated surge-rated FET. Unlike TVS diodes, it maintains a stable 27.5–28V clamping voltage across its full 40A surge rating and −40°C to +125°C operating range - making RCLAMP0582BQTCT ideal for protecting 22V power rails in USB PD and industrial systems where voltage margin is constrained.

Does RCLAMP0582BQTCT require external components to operate?

No, RCLAMP0582BQTCT is a fully self-contained protection device with integrated trigger circuitry and shunt FET. It requires no external capacitors, resistors, or biasing - only proper PCB layout: direct connection of all three IN pins (4–6) to the protected line and all three GND pins (1–3) to a low-inductance ground plane via multiple vias. This simplicity makes RCLAMP0582BQTCT deployable as a single-point solution in space-constrained designs.

How does RCLAMP0582BQTCT differ from standard TVS diodes in clamping behavior?

RCLAMP0582BQTCT uses a triggered MOSFET architecture that yields near-constant clamping voltage (27.5–28V) regardless of surge current (24–40A) or temperature (−40°C to +125°C). In contrast, standard TVS diodes exhibit linear V_C = V_BR + I_PP × R_DYN rise - causing clamping to increase with both current and temperature. This fundamental difference makes RCLAMP0582BQTCT more predictable and reliable in thermally demanding applications than any TVS-based solution.

Can RCLAMP0582BQTCT be used on high-speed data lines like USB SS or PCIe?

No - RCLAMP0582BQTCT has 175pF junction capacitance, which is too high for SuperSpeed USB (≤0.25pF required) or PCIe Gen3+ signaling. It is intended exclusively for power or medium-speed control lines (e.g., USB PD V_BUS, load switch EN/ILIM, CC/SBU). For high-speed lanes, Semtech recommends complementary low-capacitance devices such as RClamp3371ZC - ensuring RCLAMP0582BQTCT remains optimized for its designated 22V power rail protection role.

What is the recommended PCB layout for RCLAMP0582BQTCT?

Place RCLAMP0582BQTCT as close as possible to the connector or surge entry point. Connect all three IN pins (4–6) together with a short, wide trace to the protected line; connect all three GND pins (1–3) to a solid ground plane using ≥3 vias per pin. Avoid thermal pads - energy is dissipated internally. This layout minimizes parasitic inductance and ensures full 40A surge capability, as validated in Semtech's application notes for RCLAMP0582BQTCT.