LIMITRON™ 300V Class T JJN — 300Vac, 1-1200A, Fast-Acting Fuses Dimensions – in 0.88" ( 0.02) 3.06" ( 0.04) .41" Dia. ( 0.02) 1 to 30A 0.88" ( 0.02) 2.03" 0.88" 1.25" ( 0.04) 0.56" Dia. ( 0.02) 450 to 600A 35 to 60A 3.38" ( 0.04) 2.16" ( 0.02) Description: Advanced protection Class T current -limiting, fast-acting fuses. 0.284" (Typ. 2) 1.56" 0.84" Ratings: 0.344" (Typ. 2) Volts — 300Vac (1-10A) IR — 200kA Vac RMS Sym. — 100kA Vdc (700-1200A) CE, UL Listed, Std. 248-15, Class T, Guide JDDZ, File E4273 CSA Certified, C22.2 No. 248.15, Class 1422-02, File 53787 Catalog Numbers (amps) 0713 BU-SB13734 2" ( 0.04) 1" ( 0.04) 225 to 400A Agency Information: Carton Qty. 10 10 5 1 1 1 1 1 4" ( 0.04) 2.53" 1.08" 2.75" ( 0.04) 1.84" 0.86" 0.406" (Typ. 2) — 20kA Vdc (15-600A) JJN-250 JJN-300 JJN-350 JJN-400 JJN-450 JJN-500 JJN-600 JJN-700 JJN-800 JJN-1000 JJN-1200 0.562" (Typ. 2) 601 to 800A 0.88" ( 0.02) Amps — 1-1200A Amp Rating 1–30 35–60 70–100 110–200 225–400 450–600 700–800 1000–1200 1.75" ( 0.04) 110 to 200A — 300Vac, 170Vdc (700-1200A) Carton Quantity and Weight 0.75" ( 0.02) 2.44" ( 0.02) 1.69" 0.84" — 300Vac, 160Vdc (15-600A) JJN-50 JJN-60 JJN-70 JJN-80 JJN-90 JJN-100 JJN-110 JJN-125 JJN-150 JJN-175 JJN-200 JJN-225 2.22" 0.92" 70 to 100A Catalog Symbol: JJN-(amp) JJN-1 JJN-2 JJN-3 JJN-6 JJN-10 JJN-15 JJN-20 JJN-25 JJN-30 JJN-35 JJN-40 JJN-45 0.484" (Typ. 2) 0.609" (Typ. 2) 801 to 1200A Features: • Small, space-saving fuses provide a high degree of current limitation on short-circuits for excellent component protection • Commonly applied in electric heat circuits, load center, disconnect switches, and meters • The small size of the JJN Class T fuses permits installation in panelboards and control centers for system upgrading when existing circuit breakers cannot safely interrupt larger available short-circuit currents • High speed of response for semiconductor protection Recommended Fuse Blocks Fuse Amps ½-30 35-60 70-100 110-200 200 225-400 450- 600 1-Poles 2-Pole — T30030-2_ — T30060-2_ — T30100-1_ T30200-1_ — 1B0083 — T30400-1_ — T30600-1_ — 3-Pole T30030-3_ T30060-3_ T30100-2_ — — — — 4-Pole T30030-4_ T30060-4_ T30100-3_ — — — — For additional information on 300 volt Class T fuse blocks, see Data Sheet # 1115. Page 1 of 3 Data Sheet # 1025 LIMITRON™ 300V Class T JJN — 300Vac, 1-1200A, Fast-Acting Fuses 1000A 1200A 800A 600A 400A 200A 100A 60A 30A 300 15A Time-Current Curves - Average Melt AMP RATING 100 TIME IN SECONDS 10 1 RMS SYMMETRICAL CURRENT IN AMPS 0713 BU-SB13734 Page 2 of 3 10,000 1,000 20 0.01 100 0.1 Data Sheet # 1025 LIMITRON™ 300V Class T JJN — 300Vac, 1-1200A, Fast-Acting Fuses Current-Limitation Curves Custom Designs Printed circuit board versions available up to 60 amps. Consult factory for details. 400,000 300,000 Dimensions - in AMP RATING INSTANTANEOUS PEAK LET-THROUGH CURRENT IN AMPS B 200,000 100,000 80,000 60,000 1.743" (± .020) 1.395" (± .015) .875" (± .015) 1200 800 600 40,000 30,000 400 200 100 20,000 10,000 8,000 6,000 0.190"MIN. CL 0.500" 60 30 15 4,000 3,000 A 2,000 1,000 800 600 400 300 B 200,000 60,000 80,000 100,000 30,000 40,000 20,000 6,000 8,000 10,000 3,000 4,000 2,000 600 800 1,000 300 400 200 200 100 A PROSPECTIVE SHORT-CIRCUIT CURRENT–SYMMETRICAL RMS AMPS Current-Limiting Effects Prosp. Let-Through Current S.C.C. (Apparent RMS Symmetrical Vs. Fuse Rating) 15A 30A 60A 100A 200A 400A 600A 800A 500 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 5000 1000 1000 1000 1000 2000 3000 5000 5000 10,000 1000 1000 1000 2000 2000 4000 6000 7000 15,000 1000 1000 1000 2000 3000 4000 6000 9000 20,000 1000 1000 1000 2000 3000 5000 7000 10,000 25,000 1000 1000 2000 2000 3000 5000 7000 10,000 30,000 1000 1000 2000 2000 3000 5000 8000 11,000 35,000 1000 1000 2000 3000 4000 6000 8000 11,000 40,000 1000 1000 2000 3000 4000 6000 9000 11,000 50,000 1000 1000 2000 3000 4000 7000 9000 12,000 60,000 1000 1000 2000 3000 4000 7000 10,000 13,000 70,000 1000 1000 2000 3000 5000 7000 10,000 14,000 80,000 1000 2000 2000 3000 5000 8000 11,000 15,000 90,000 1000 2000 2000 3000 6000 8000 11,000 15,000 100,000 1000 2000 2000 4000 6000 8000 12,000 16,000 150,000 1000 2000 3000 4000 6000 9000 13,000 17,000 200,000 2000 2000 3000 4000 7000 9000 15,000 19,000 Fuse Amps/Catalog Number JJN-(1-30)L JJN-(35-60)L JJN-(35-60)L-01 A 0.406 0.563 0.563 B 0.125 0.125 0.165 The JJN-XXL products are UL Component Recognized under Guide JFHR2, File E56412. 1200A 1000 1000 5000 9000 10,000 11,000 12,000 13,000 13,000 13,000 15,000 16,000 17,000 17,000 18,000 19,000 22,000 23,000 The only controlled copy of this Data Sheet is the electronic read-only version located on the Cooper Bussmann Network Drive. All other copies of this document are by definition uncontrolled. This bulletin is intended to clearly present comprehensive product data and provide technical information that will help the end user with design applications. Cooper Bussmann reserves the right, without notice, to change design or construction of any products and to discontinue or limit distribution of any products. Cooper Bussmann also reserves the right to change or update, without notice, any technical information contained in this bulletin. Once a product has been selected, it should be tested by the user in all possible applications. 0713 BU-SB13734 Page 3 of 3 Data Sheet # 1025