Remeha S36446 Safety Temperature Limiter STB 110°C - Landis & Gyr RAK 77.4471

The Remeha S36446 is a high-reliability Safety Temperature Limiter (STB) manufactured by Landis & Gyr / Siemens under type RAK 77.4471. Pre-set with a cutoff threshold of 110°C, this electromechanical capillary thermostat is designed to protect central heating systems and commercial gas boilers against overheating by triggering a hard safety lockout when the maximum allowable temperature is reached.

Features:

• Brand: Remeha / Landis & Gyr (Siemens)
• Model / Type: RAK 77.4471 / RAK77.4471
• Part Number: S36446
• Function: Safety Temperature Limiter (STB) / Overheat Cutoff Switch
• Application: Remeha Heating Boilers & Thermal Plant Equipment
• Reset Type: Manual Safety Reset

Technical Specifications:

• Cutoff Temperature: 110°C
• Sensor Element: Capillary tube with sensing bulb
• Contact Configuration: Single-pole changeover (SPDT) switch
• Switching Capacity: 10(2.5) A, 250 V AC
• Housing Material: High-impact thermal resistant plastic casing

Key Benefits:

• Critical Thermal Protection: Instantly interrupts power to the gas valve or burner controller if system temperature exceeds 110°C.
• Direct Replacement: Original OEM replacement part for precise fitment in Remeha commercial and industrial boilers.
• Fail-Safe Design: Capillary action ensures reliable mechanical trip operation independent of digital controller electronics.

Important Notes:

• VAT invoices available upon request.
• Returns accepted within 30 days; buyer pays return shipping.