Product: D48X Limit Switch — 21A / 250VAC Why you need it Protects equipment and users by restoring or providing reliable overtemperature control for water heaters. Handles current loads (up to 21A at 250VAC), so it performs reliably in demanding heating applications. Reduces downtime and maintenance costs by offering durable switching performance for frequent on/off cycles. Key benefits current capacity: Supports up to 21A at 250VAC to handle large heating elements without overheating the switch. Safety control: Functions as a limit switch that helps prevent overheating and ensures the water heater operates within safe temperature limits. Built for durability: Constructed with materials designed to endure harsh operating conditions for long service life. Broad compatibility and easy installation: Compatible with a variety of water heater models and simple to install, suitable for both professional technicians and DIY maintenance. What it does (function) Acts as the primary limit switch in water heater systems to interrupt power when temperature thresholds are exceeded. Provides a reliable electrical contact rating of 21A at 250VAC to switch heating circuits safely. Features and attributes Model: D48X Function: Limit switch for temperature/overheat protection in water heaters Performance: Rated up to 21A at 250VAC for current applications Construction: Made from durable materials to withstand typical service conditions Compatibility: Designed to work with various electric water heater models; straightforward replacement part Typical applications / use scenarios Residential electric water heater replacement: Swap a failed limit switch with the D48X to restore overheat protection and normal operation. Lightcommercial or multifamily systems: Use in larger or higherduty water heaters where higher current capacity is required for reliable switching. Preventive maintenance for property managers or service technicians: Install during routine servicing to ensure continued safe operation and reduce risk of heater failures. Installation and user notes Intended as a direct replacement or spare limit switch for compatible water heater models; refer to the water heater manufacturer's guidelines for exact fit and mounting. Suitable for installers and experienced DIY users familiar with electrical safety procedures; disconnect power before servicing. Specifications summary Model: D48X Electrical rating: up to 21A at 250VAC Function: Limit switch for water heater overtemperature control Intended use: Water heater systems; compatible with various models the D48X when you need a dependable, current limit switch to maintain safe, reliable operation of water heater systems.