Semtech Corporation 1N6113A

Overview

1N6113A 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 input protection and industrial load switch inputs.

For engineers reviewing the 1N6113A datasheet, pinout, applications, or equivalent options, key selection criteria include clamping stability across temperature and current, low R_DYN for minimal voltage overshoot, DFN-6 package footprint constraints, and compatibility with 22V bus architectures requiring robust surge resilience per IEC 61000-4-5.

Technical Context

The 1N6113A 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 threshold. Unlike conventional TVS diodes, its clamping voltage remains nearly constant across 24–40A (8/20μs) due to decreasing R_DS(on) under surge conditions.

It operates over –40°C to +125°C, maintains stable 27.5–28V clamping up to 125°C, and delivers 1120W peak pulse power. Its 175pF capacitance at 22V/1MHz and <600nA leakage at VRWM make it suitable for moderate-speed data/power line protection where low parasitic capacitance is required but not ultra-low (<1pF).

Key Specifications

Pinout & Package

1N6113A is housed in a RoHS-compliant DFN-6 package measuring 1.6mm × 1.6mm × 0.55mm with exposed thermal pad not required; all six terminals are functional and must be connected for full 40A surge rating.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMAJ22A, 1N6113A delivers 3.2× higher peak current handling and thermally stable clamping, while TDS2211P provides identical protection with improved supply chain continuity and documented qualification for USB PD and industrial surge standards.

Availability

1N6113A is available at Aetrix Electronics and suitable for USB Type-C PD interfaces, industrial load switch inputs, and IoT 22V power rail protection requiring stable component supply across extended temperature ranges and multi-year production cycles.

Supply support for 1N6113A 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 ICs for precision sensing, protection, and signal integrity.

The 1N6113A belongs to Semtech's Transient Diverting Suppressor (TDS) product line, engineered to replace conventional TVS diodes in high-reliability 22V bus protection where clamping stability, temperature independence, and surge energy handling are critical.

FAQ

What is the exact clamping voltage specification for 1N6113A at 40A?

The 1N6113A clamps at 27.5–28V under 40A peak pulse current (tp = 8/20μs) with a 2Ω source impedance, as verified in the official Semtech datasheet Rev 2.5. This value is guaranteed across –40°C to +125°C and reflects the device's constant-clamp FET architecture - not a typical TVS diode's linear V_C = V_BR + I_PP × R_DYN behavior. The 1N6113A achieves this via low R_DS(on) activation, making it highly predictable for 22V system design.

Is 1N6113A pin-compatible with TDS2211P?

Yes, 1N6113A is pin-compatible with TDS2211P: both use the identical 6-pin DFN package (1.6mm × 1.6mm × 0.55mm) with pins 1–3 as GND and pins 4–6 as IN. Semtech documentation confirms TDS2211P is the qualified successor to 1N6113A, sharing identical electrical specifications, thermal performance, and layout requirements. No PCB changes are required when migrating from 1N6113A to TDS2211P in existing designs.

Can 1N6113A protect USB 3.2 SuperSpeed differential pairs?

No, 1N6113A is not suitable for USB 3.2 SuperSpeed (5–10Gbps) differential lanes due to its 175pF junction capacitance - which would severely degrade signal integrity. It is intended for USB Type-C VBus, CC, SBU, or power delivery control lines, not high-speed data paths. For SuperSpeed protection, Semtech recommends low-capacitance devices like RClamp3371ZC (<0.25pF). The 1N6113A's role is strictly 22V power/data line EOS suppression, not high-frequency signal conditioning.

What is the maximum operating temperature range for 1N6113A?

The 1N6113A is rated for continuous operation from –40°C to +125°C ambient temperature, with junction temperature reaching up to +150°C under surge conditions. Its clamping voltage remains stable across this full range - unlike standard TVS diodes whose V_C increases significantly with temperature. This makes the 1N6113A appropriate for under-hood automotive modules, industrial PLCs, and outdoor IoT equipment where thermal derating cannot be assumed. All key parameters, including 27.5–28V clamping at 40A, are validated across this range.

Does 1N6113A require a thermal pad or heatsink on the PCB?

No, the 1N6113A does not require an exposed thermal pad or external heatsink. Its DFN-6 package dissipates surge energy primarily through low-inductance GND connections (pins 1–3) and the copper pour beneath the body. Semtech explicitly states "no thermal pad is needed" because transient energy is absorbed during short-duration events (≤20μs), not steady-state power dissipation. Layout best practice is to connect all GND pins to a solid ground plane using ≥3 vias per pin - not to add thermal mass. This simplifies layout while maintaining full 40A rating for the 1N6113A.