The **KLS-B-2-R/Q** is a specific variant of a **Miniature Circuit Breaker (MCB)** or a supplementary protector, typically manufactured by companies like **Kuoyuh** or distributed by electronics vendors like **KLS Electronic**. It is primarily used for overcurrent protection in small appliances and industrial equipment. ### 1. Component Overview This device is a thermal circuit breaker designed to protect electrical circuits from damage caused by excess current from an overload or short circuit. | Feature | Specification Details | | :--- | :--- | | **Component Type** | Thermal Circuit Breaker / Overload Protector | | **Reset Type** | Manual Reset (Push-to-reset) | | **Number of Poles** | Single Pole (1P) | | **Mounting Style** | Panel Mount (Threaded neck with nut) | | **Termination** | Quick-connect terminals (Solder/Plug-in) | --- ### 2. Key Electronic Parts & Construction The functionality of the KLS-B-2-R/Q relies on several internal mechanical and electrical parts: * **Bimetallic Strip:** The core sensing element. It consists of two different metals bonded together. When current exceeds the rating, the strip heats up, bends, and triggers the trip mechanism. * **Trip Mechanism:** A spring-loaded latch that snaps the contacts open when the bimetallic strip reaches a specific deflection point. * **Contact Points:** High-conductivity metal points (often silver-plated) that maintain the electrical path. * **Manual Reset Button:** The "R" in the part number often signifies a manual reset functionality. Once tripped, the button pops out, and the user must physically push it back to restore the circuit. * **Housing:** Typically made of flame-retardant plastic (UL 94V-0 rated) to prevent electrical fires. --- ### 3. Decoding the Part Number (General Breakdown) While specific manufacturer prefixes may vary, the breakdown generally follows this logic: | Segment | Meaning | | :--- | :--- | | **KLS** | Manufacturer/Brand Identifier. | | **B** | Series designation (Standard thermal protector). | | **2** | Voltage or Physical frame size (Often relates to 125/250VAC capacity). | | **R** | **Reset Type:** Manual Push-to-reset. | | **Q** | **Terminal Type:** Quick-connect (usually 6.3mm or 4.8mm spade terminals). | --- ### 4. Technical Specifications Common electrical parameters for this class of component include: * **Rated Voltage:** 125VAC / 250VAC or 32VDC/50VDC. * **Current Rating:** Available in increments (e.g., 3A, 5A, 10A, 20A). * **Interrupt Capacity:** Typically 1,000 Amps. * **Insulation Resistance:** > 100MΩ at 500VDC. * **Dielectric Strength:** 1,500VAC for 1 minute. --- ### 5. Common Applications * **Power Strips:** Protecting multiple outlets from total load overload. * **Household Appliances:** Used in coffee makers, blenders, and vacuum cleaners. * **Industrial Tools:** Protecting motors in drills or saws from stalling. * **Marine/Automotive:** Small DC circuit protection for accessories.