Information of 3455RMG04780045 Phenolic Manual Reset Thermostat

Basic Overview

• Product Type: Commercial phenolic manual reset thermostat (snap-action bimetal type)
• Manufacturer: Honeywell International Inc.
• Document Reference: Honeywell Sensors and Switches Catalog (Cat.05, ©2005)
• Core Function: Provides electrical circuit interruption in response to temperature changes; requires manual reset to restore circuit after tripping, designed for temperature control and protection in commercial and industrial applications
• Key Features: Manual reset mechanism, phenolic housing (cost-effective and durable), snap-action bimetal disc for rapid temperature response, electrically isolated sensing element, compatible with standard terminals and mounting brackets, UL-tested for 1,000 load cycles and 5,000 no-load cycles
• Key Identifiers:

Core Specifications

1. Electrical Ratings

2. Temperature Ratings

3. Physical and Mechanical Characteristics

4. Environmental and Reliability Ratings

Functional Details

1. Core Functionality

• Temperature Sensing: The bimetal disc actuates when surface/ambient temperature reaches the calibrated snap point, opening the normally closed contacts.
• Manual Reset: After tripping, the circuit remains open until the manual reset button is pressed (requires temperature to return to safe levels).
• Rapid Response: Low-mass bimetal disc design ensures fast reaction to temperature changes, minimizing overshoot.
• Electrical Isolation: Sensing element is electrically isolated from the switch to prevent short circuits.

2. Key Operational Notes

• Not classified as a limit device; backup protection is required for applications needing limit thermostat functionality.
• Do not use as a final safety device (intended for temperature-based circuit interruption, not emergency stop).
• Avoid exposure to chlorinated hydrocarbons and ketones; recommended cleaning agents: methanol and isopropanol.

Application Guidelines

1. Typical Applications

• Small and major appliances (e.g., ovens, refrigerators, washing machines)
• Automotive auxiliary systems
• Office equipment (e.g., copy machines, printers)
• Heat and smoke detectors
• HVAC systems (heating/cooling control)
• Industrial machinery temperature protection

2. Installation and Usage Notes

• Mount using compatible brackets (per Honeywell Standard Mounting Bracket Guide for non-hermetic thermostats).
• Select appropriate terminals (solder, quick connect, or spade) based on application requirements.
• Ensure a minimum 30 °C (86 °F) differential between operating ambient temperature and thermostat’s set temperature (to maximize product life).
• Follow proper wiring practices to avoid short circuits; refer to Honeywell’s terminal connection diagrams.
• Store in dry environment within the specified temperature range when not in use.

3. Compatibility

• Terminals: Compatible with standard terminal types (T-101, T-106, T-140, T-146, etc. as per catalog).
• Mounting Brackets: Works with Honeywell’s standard stationary/movable surface brackets (B-201, B-203, B-205, etc.).
• Seal Washers: Compatible with Nitrile rubber or Vamac® washers for environmental sealing (plastic threaded options).