The 312 Series from Littelfuse are 250 VAC, time-delay, subminiature fuses. These fuses are designed to provide overcurrent protection in a variety of applications. The time-delay characteristic allows for brief surges, such as those experienced when starting a motor, without opening the circuit, while still protecting against sustained overcurrent conditions.

Applications:

• Power Supplies: Protection for internal components of AC/DC and DC/DC power supplies.
• Battery Chargers: Overcurrent protection in charging circuits for various battery types.
• Consumer Electronics: Use in televisions, DVD players, and other electronic devices to protect against faults.
• Industrial Equipment: Protecting control circuits and other sensitive electronics in industrial machinery.
• Lighting Ballasts: Protection of lighting ballasts from overcurrent conditions due to component failure or other issues.

Features:

• Time-Delay Characteristics: Allows short duration overloads without interrupting the circuit.
• Subminiature Size: Compact size for use in space-constrained applications.
• 250 VAC Voltage Rating: Suitable for use in standard AC power circuits.
• Wide Range of Current Ratings: Available in a variety of current ratings to suit different applications.
• RoHS Compliant: Environmentally friendly due to compliance with Restriction of Hazardous Substances (RoHS) directive.

Benefits:

• Reliable Overcurrent Protection: Provides dependable protection against damage from overcurrent conditions.
• Reduced Nuisance Tripping: Time-delay characteristic minimizes unwanted fuse blowing due to transient surges.
• Space Saving Design: Small size allows for use in compact electronic devices.
• Versatile Application: Suitable for a wide variety of applications requiring overcurrent protection.
• Environmentally Responsible: RoHS compliance ensures minimal environmental impact.

Technical Specifications:

• Voltage Rating: 250 VAC
• Interrupting Rating: Consult the datasheet for specific interrupting rating, typically several times the rated current.
• Operating Temperature Range: Consult the datasheet.
• Agency Approvals: UL Recognized, CSA Certified, and VDE Approved (depending on the specific part number within the 312 series)
• Material: Typically ceramic body with silver-plated copper alloy terminals.

For detailed specifications, including current rating options and exact performance curves, refer to the Littelfuse datasheet for the 312 Series subminiature fuses.