This document is a datasheet for the 312/318 series glass body axial lead and cartridge fuses. The table provides information on the rated voltage, current, melting resistance, and I2t for these fuses.
This document provides technical specifications for the Littelfuse 3AG Fast-Acting Type 312/318 Series of Axial Lead and Cartridge Fuses. These glass-bodied fuses are designed to provide cost-effective reliability and performance in circuit protection applications.
The datasheet lists electrical characteristics including ampere ratings, opening times at various percentage loads, and interrupting ratings up to 10,000A @ 125VAC and 385A @ 250VAC. It also includes a comprehensive ordering table with catalog numbers for nominal amperage and voltage ratings.
| Opening Time (110% of Ampere Rating) | 4 hours, Minimum |
|---|---|
| Opening Time (135% of Ampere Rating) | 1 hour, Maximum |
| Interrupting Rating @ 125VAC | 10,000A |
| Interrupting Rating @ 250VAC | 385A |
| Agency Approval (Underwriters Laboratories) | Listed by Underwriters Laboratories |
The fuses are listed by Underwriters Laboratories and certified by CSA through 30 amperes.
The interrupting rating is 385A at 250VAC.
The axial lead material is solder coated copper.