HALM RTR-5510 Flush-Mounted Room Thermostat 230V with 55x55mm Center Plate, Pure White Glossy

Precise mechanical temperature control from +5°C to +30°C with a switching differential of just 0.5 K — the HALM RTR-5510 delivers stable, energy-efficient regulation for electric heating, water-based floor heating, or actuators. Its bimetal sensor with thermal feedback ensures reliable switching, while the flush-mounted design integrates seamlessly into standard 55x55mm switch programs.

Overview

The HALM RTR-5510 is a 230V AC room thermostat engineered for concealed installation. It features a robust screw-terminal connection, a single normally open (N.O.) contact rated for 10 A resistive and 2 A inductive loads, and an LED indicator that shows when heating is active. The thermostat includes a fixed frost protection function at approximately +5°C, preventing freezing in unoccupied spaces.

What stands out

• Mechanical rotary knob for intuitive, tool-free temperature adjustment
• Compatible with all standard 55x55mm switch ranges for a uniform look
• High switching capacity: 10 A resistive / 2 A inductive
• Built-in frost protection at +5°C
• LED heating status indicator
• Compact installation depth of approx. 25 mm

Technical details

• Operating voltage: 230V AC, 50/60 Hz
• Temperature control range: +5°C to +30°C
• Switching differential: approx. 0.5 K
• Contact type: 1 N.O. (normally open)
• Connection: screw terminals
• Protection class: IP20
• Material: thermoplastic, pure white glossy (reinweiß glänzend)
• Sensor: bimetal with thermal feedback
• Certification: CE

Our verdict

A dependable, no-frills thermostat that combines precise control with broad compatibility. Its flush-mounted design and standard center plate make it an easy retrofit for any 55x55mm switch system, while the frost protection and LED indicator add practical value for both residential and light commercial applications.