1. Introduction
This manual provides essential instructions for the proper installation, operation, and maintenance of the Littelfuse Model 03450601H Fuseholder. Please read this manual thoroughly before using the product to ensure safe and efficient performance.
2. Product Overview
The Littelfuse 03450601H is a 20 Amp, 300 Volt fuseholder designed for panel mounting. It features a low-profile, right-angle design with a screwdriver slot for fuse access and quick-connect terminals for easy wiring. This fuseholder is compatible with 3AG type fuses.
Figure 1: This image displays the Littelfuse 03450601H fuseholder in an exploded view. It shows the main black cylindrical body with a right-angle quick-connect terminal, a separate black threaded mounting nut, and a gray 3AG fuse with a screwdriver slot cap, ready for insertion.
Key Features:
- Hold Fuse Type: Holder
- Termination Style: Quick Connect
- Number of Poles: 1
- Operating Temperature Range: -40 to +85 °C
- Height Above Board: 42.16 mm
- Diameter: 16.51 mm
- Contact Material: Brass
- Contact Plating: Tin
- Rated Voltage: 300 V
- Current Rating: 20 A
3. Specifications
| Feature | Value |
|---|---|
| Model Number | 03450601H |
| Current Rating | 20 A |
| Voltage Rating | 300 V |
| Fuse Type Compatibility | 3AG |
| Mounting Type | Panel Mount |
| Orientation | Right Angle |
| Termination | Quick Connect |
| Operating Temperature | -40 to +85 °C |
| Item Weight | 0.23 ounces |
| Manufacturer | LITTELFUSE |
4. Setup and Installation
Installation should be performed by qualified personnel following all local electrical codes and safety regulations.
- Safety First: Ensure that the power supply to the circuit where the fuseholder will be installed is completely disconnected and locked out before beginning any work.
- Panel Preparation: Create an appropriately sized mounting hole in the panel for the fuseholder body. Refer to the product's technical drawing for precise dimensions.
- Mounting: Insert the fuseholder body through the prepared hole from the front of the panel. Secure it in place using the provided threaded mounting nut on the rear of the panel. Tighten the nut firmly but do not overtighten.
- Wiring: Connect the circuit wires to the quick-connect terminals on the rear of the fuseholder. Ensure connections are secure and properly insulated. The right-angle design facilitates wiring in confined spaces.
- Fuse Insertion: Before restoring power, insert the correct 3AG fuse into the fuseholder. Align the fuse with the internal contacts and push it gently until it seats properly. The screwdriver slot cap should then be threaded onto the fuseholder body to secure the fuse.
5. Operation
The Littelfuse 03450601H fuseholder is designed for straightforward operation once installed.
- Fuse Function: The fuse within the holder protects the electrical circuit from overcurrent conditions. If an overcurrent occurs, the fuse will blow, interrupting the circuit and preventing damage to components.
- Fuse Replacement: To replace a blown fuse, ensure the power to the circuit is off. Use a screwdriver to unscrew the fuse cap. Carefully remove the old fuse and insert a new fuse of the identical type and rating (3AG, 20A, 300V). Screw the cap back on securely.
6. Maintenance
Regular maintenance helps ensure the longevity and reliable performance of your fuseholder.
- Periodic Inspection: Periodically inspect the fuseholder for any signs of physical damage, corrosion, or loose connections.
- Cleaning: If necessary, clean the exterior of the fuseholder with a dry, lint-free cloth. Do not use abrasive cleaners or solvents. Ensure power is disconnected before cleaning.
- Contact Integrity: Verify that the quick-connect terminals maintain a firm grip on the wires. Re-terminate if any looseness is observed.
7. Troubleshooting
If the circuit protected by the fuseholder is not functioning, consider the following:
- No Power: Check if the fuse is blown. A blown fuse will typically show a broken filament or discoloration. Replace with a new fuse of the correct rating.
- Intermittent Power: Inspect all wiring connections to the quick-connect terminals for looseness or corrosion. Ensure the fuse cap is screwed on tightly.
- Repeated Fuse Blowing: If fuses blow repeatedly, it indicates an underlying issue in the circuit, such as an overload or short circuit. Consult a qualified electrician to diagnose and rectify the circuit fault. Do not install a fuse with a higher current rating than specified.
8. Warranty Information
Specific warranty details for the Littelfuse 03450601H fuseholder are not provided in the product information. Please refer to the official Littelfuse website or contact their customer support for comprehensive warranty terms and conditions.
9. Support
For technical assistance, product inquiries, or further information regarding the Littelfuse 03450601H fuseholder, please contact Littelfuse customer support directly. Visit the official Littelfuse website for contact details and additional resources.
