### KTK-R-2 Electronic Component Overview The **KTK-R-2** is a specific model of high-performance industrial fuse. It belongs to the **Limitron™** series manufactured by Eaton's Bussmann Division. The "2" in the part number signifies its current rating. --- ### Technical Specifications | Feature | Specification | |:---|:---| | **Fuse Type** | Fast-Acting / Class CC | | **Current Rating** | 2 Amperes | | **Voltage Rating (AC)** | 600 Vac | | **Interrupting Rating** | 200 kA RMS Symmetrical | | **Body Material** | Melamine (Glass Tube) | | **Terminal Material** | Nickel-plated Bronze caps | | **Dimensions** | 13/32" x 1-1/2" (10.3 x 38.1 mm) | --- ### Key Characteristics #### 1. Class CC Classification The KTK-R-2 is a **Class CC** fuse. This is a North American standard for "Current Limiting" fuses. They are designed to be physically non-interchangeable with other fuse types (due to a unique rejection tip) to ensure that a lower-rated fuse isn't accidentally replaced by one with higher capacity or lower safety ratings. #### 2. Fast-Acting Response Unlike "Time-Delay" fuses which can handle brief surges (like motor startups), the KTK-R-2 is **Fast-Acting**. It is designed to open almost instantaneously when it detects an overcurrent, providing maximum protection for sensitive electronic components. #### 3. High Interrupting Rating It has a **200,000 Amp** interrupting rating. This means it can safely stop a massive short-circuit current without exploding or arching over, which is critical for industrial power distribution. --- ### Common Applications * **Control Circuits:** Used to protect the control transformers and circuits in industrial machinery. * **Lighting Loads:** Protection for non-inductive lighting systems. * **General Purpose Protection:** Any application requiring a 600V rated, high-interrupting, fast-response fuse. * **Branch Circuit Protection:** Often found in specialized fuse blocks or DIN-rail mounted holders. --- ### Comparison with KTK (Non-R) The "R" in the name is the most critical suffix for technicians: * **KTK:** Standard midget fuse without a rejection tip. * **KTK-R:** Includes a physical **rejection tip** on the end cap, preventing it from being inserted into holders not designed for Class CC fuses, ensuring circuit safety compliance.