LR250

LLNRK/LLSRK Series POWR-PRO® Class RK1 250/600 VAC s Dual-Element, Time-Delay s 1/10 – 600 Amperes SPECIFICATIONS Voltage Ratings: AC: 250 Volts (LLNRK) 600 Volts (LLSRK) DC: 125 Volts (LLNRK) 300 Volts (LLSRK) Interrupting Ratings: AC: 200,000 amperes rms symmetrical 300,000 amperes rms symmetrical (Littelfuse self-certified) DC: 20,000 amperes Ampere Range: 1/10 – 600 amperes Approvals: AC: Standard 248-12, Class RK1 UL Listed (File No: E81895) CSA Certified (File No: LR29862) QPL: Federal Specification No.WF-1814 DC: Littelfuse self-certified AMPERE RATINGS 1 10 15 100 ⁄ ⁄ ⁄ ⁄4 * 3 ⁄10 4 ⁄10 1 ⁄2 6 ⁄10 8 ⁄10 2 10 1 1 11⁄8 11⁄4 14⁄10 16⁄10 18⁄10 2 21⁄4 21⁄2 28⁄10 3 32⁄10 31⁄2 4 41⁄2 5 56⁄10 6 61⁄4 7 8 9 10 12 15 171⁄2 20 25 30 35 40 45 50 60 70 80 90 100 110 125 150 175 200 225 250 300 350 400 450 500 600 * LLSRK Only. Example part number (series & amperage): LLNRK 450 RECOMMENDED FUSE BLOCKS LR250 series (LLNRK Series) LR600 series (LLSRK Series) Refer to Fuse Block section of this catalog for additional information. Littelfuse LLNRK and LLSRK series POWR-PRO® fuses provide superior overload and short circuit protection for service entrance, main, feeder and general-purpose branch circuits up to 600 amperes. LLNRK/LLSRK series fuses can be installed in existing Class H fuse blocks to upgrade systems containing lower interrupting rating Class H one-time or renewable fuses. FEATURES/BENEFITS s Extremely current limiting — Reduces damage to circuits and equi...