RLM-33+

Overview

The RLM-33+ is a general-purpose RF limiter designed for surface mount applications. It operates over a frequency range of 200 kHz to 3 GHz, with some documentation citing 30 MHz to 3000 MHz. The device protects sensitive circuits against ESD and input power surges. It features excellent limiting characteristics beyond +12 dBm input power and offers a very quick recovery time of 10 nanoseconds. Packaged in a miniature 6-SMD form factor (TT1224 case style), it is constructed using silicon technology.

Feature Summary

• Provides protection against electrostatic discharge and high-power input surges
• Delivers excellent signal limiting performance at input powers exceeding +12 dBm
• Ensures rapid circuit recovery with a specified time of 10 nanoseconds

Applications

• Protection of low-noise amplifiers in receiver front-ends
• Surge protection for sensitive RF measurement equipment
• Input protection in wireless communication systems

Procurement Notes

Verify the specific suffix designation when ordering, as variants such as RLM-33-2W+ exist within the same product family. Confirm that the required frequency coverage aligns with your system specifications, noting potential discrepancies between 200 kHz and 30 MHz lower limits in available documentation. Ensure compatibility with the TT1224 surface mount footprint during PCB layout design.

Selection Notes

Select this component for applications requiring robust input protection without significant signal degradation at moderate power levels. The wide frequency range supports versatile deployment across various RF bands. Consider the 10 ns recovery time for high-speed pulse applications. Evaluate the SMD package constraints against available board space and thermal management requirements for the target environment.

Part Context

This limiter belongs to the RLM series from Mini-Circuits, which focuses on compact, surface-mount protection solutions. The RLM-33+ utilizes silicon construction to deliver reliable performance in a small footprint. It serves as a critical interface component between high-power sources and delicate downstream RF stages, ensuring system integrity against transient events.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material.