Limitron™ Class J JKS — 600Vac, 70-600A, Fast-Acting Fuses Dimensions - in 4.63" 3.63" 2.63" 0.38" 0.75" 1" 0.28" 7.13" 5.25" 3.38" 1.13" 1.63" 0.13" 0.53" 225 to 400A 65 to 100A 5.75" 4.38" 3.0" 0.41" 8.0" 6.0" 3.75" 1.13" 0.28" 0.38" 1.38" Description: Advanced protection Class J current-limiting, fast-acting fuses. Catalog Symbol: JKS-(amp) Ratings: Volts — 600Vac Amps — 70-600 IR — 200kA Vac RMS Sym. 2" 0.19" Features: • Provides 10X better current limitation to help prevent equipment damage caused by short-circuit events. • 200kA Interrupting rating complies with NEC® Section 110.9 for today's large capacity systems. • Fast-acting fuse helps prevent equipment damage caused by short-circuit events. • Ideal for critical industrial or commercial applications that have specific current limitation requirements. Recommended Fuse Blocks CE, UL Listed Class J (Guide # JDDZ, File # E4273) Fuse Amps 70-100 110-200 225-400 450-600 Catalog Numbers (amps) JKS-70 JKS-80 JKS-90 JKS-100 JKS-110 JKS-125 JKS-150 JKS-175 JKS-200 JKS-225 JKS-250 JKS-300 JKS-350 JKS-400 JKS-450 Carton Quantity: Amp Rating 70–100 110–600 Carton Qty. 5 1 JKS-500 JKS-600 0.38" 2.13" 0.69" 1-Pole JM60100-1CR JM60200-1CR JM60400-1CR JM60600-1CR 2-Pole JM60100-2CR JM60200-2CR JM60400-2CR JM60600-2CR 3-Pole JM60100-3CR JM60200-3CR JM60400-3CR JM60600-3CR For additional information on the JM Series of fuse blocks, see product brochure # 3192. Fuse Reducers For Class J Fuses Equipment Fuse Clips 100A 200A 400A 600A Desired Fuse (Case) Size 30A 60A 60A 100A 100A 200A 200A 400A Catalog Numbers (Pairs) J-13 J-16 J-26† J-21† J-41† J-42† J-62† J-64† † Not for bolt-in applications. 0615 BU-SB13736 2.5" 450 to 600A Agnecy Information: CSA HRCI-J (Class 1422-02, File # 53787) 0.25" 0.53" 1.5" 110 to 200A *2" 1.88" Page 1 of 3 Data Sheet # 1027 Limitron™ Class J JKS — 600Vac, 70-600A, Fast-Acting Fuses 600A 400A 200A 300 100A Time-Current Curves - Average Melt AMP RATING 100 TIME IN SECONDS 10 1 CURRENT IN AMPS 0615 BU-SB13736 Page 2 of 3 10,000 1000 40 0.01 100 0.1 Data Sheet # 1027 Limitron™ Class J JKS — 600Vac, 70-600A, Fast-Acting Fuses Current-Limitation Curves B AMP RATING 300,000 200,000 100,000 80,000 60,000 50,000 40,000 600 400 30,000 200 20,000 100 10,000 8000 6000 5000 4000 3000 A 200,000 80,000 100,000 30,000 40,000 50,000 60,000 20,000 8000 10,000 4000 5000 6000 3000 1000 2000 2000 1000 INSTANTANEOUS PEAK-LET-THROUGH CURRENT IN AMPS 400,000 RMS SYMMETRICAL CURRENT IN AMPS A-B = ASYMMETRICAL AVAILABLE PEAK (2.3 X SYM RMS AMPS) Current-Limiting Effects Prosp. Let-Through Current S.C.C. (Apparent RMS Symmetrical Vs. Fuse Rating) — 100A 200A 400A 600A 5000 2000 3000 4000 5000 10,000 3000 4000 6000 9000 15,000 3000 4000 7000 10,000 20,000 3000 5000 8000 11,000 25,000 3000 6000 9000 12,000 30,000 3000 6000 9000 13,000 35,000 4000 6000 9000 13,000 40,000 4000 7000 10,000 14,000 50,000 4000 7000 10,000 15,000 60,000 5000 7000 11,000 16,000 70,000 5000 8000 11,000 17,000 80,000 5000 8000 12,000 17,000 90,000 6000 9000 13,000 18,000 100,000 6000 9000 13,000 18,000 150,000 6000 9000 14,000 22,000 200,000 7000 10,000 16,000 24,000 The only controlled copy of this Data Sheet is the electronic read-only version located on the 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. Bussmann reserves the right, without notice, to change design or construction of any products and to discontinue or limit distribution of any products. 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. 0615 BU-SB13736 Page 3 of 3 Data Sheet # 1027