Bussmann ® Square Body – Flush End Contact 1250V/1300V (IEC/U.L.) 50-1400A Electrical Characteristics Rated Current I2t (A2S) RMSClearing Clearing Size Amps Pre-arc at 1000V at 1250V 50 135 815 1100 63 215 1300 1750 80 420 2500 3350 100 750 4450 5950 125 1450 9000 11500 1* 160 2600 16000 21000 200 5150 31000 41000 250 9200 54500 73000 315 18500 115000 150000 350 27000 165000 220000 400 53000 265000 335000 160 1900 11500 15500 200 3800 22500 30000 250 7750 46000 61500 315 15000 90000 120000 1 350 20000 125000 165000 400 29500 175000 235000 450 42000 250000 335000 500 69500 340000 435000 550 95000 465000 590000 630 130000 660000 250 6500 38500 51500 280 9350 55500 74500 315 13000 77500 105000 350 16500 97500 135000 400 23000 140000 180000 450 34000 205000 270000 2 500 48000 285000 380000 550 62000 370000 495000 630 115000 575000 730000 700 160000 795000 1050000 800 245000 1200000 1550000 †900 360000 1750000 †1000 480000 2350000 315 9500 58000 77500 350 13500 81500 110000 400 19500 120000 160000 450 31000 185000 245000 500 39000 235000 310000 550 55000 325000 435000 630 83500 495000 665000 3 700 115000 705000 940000 800 205000 995000 1300000 900 305000 1500000 1900000 1000 450000 2150000 2750000 1100 575000 2800000 3600000 †1250 810000 3950000 †1400 1250000 6000000 Ordering Information -BKN/80 -BKN/90 -GKN/75 Type K Type K Type K Indicator Indicator Indicator for Micro for Micro for Micro 170M3438 170M3488 170M3439 170M3489 170M3440 170M3490 170M3441 170M3491 170M3442 170M3492 170M3443 170M3493 170M3444 170M3494 170M3445 170M3495 170M3446 170M3496 170M3447 170M3497 170M3448 170M4438 170M4488 170M4439 170M4489 170M4440 170M4490 170M4441 170M4491 170M4442 170M4492 170M4443 170M4493 170M4444 170M4494 170M4445 †170M4495 170M4446 ‡170M4496 †170M4447 ‡170M4497 170M5438 170M5588 170M5439 170M5589 170M5440 170M5590 170M5441 170M5591 170M5442 170M5592 170M5443 170M5593 170M5444 170M5494 170M5594 170M5445 170M5495 170M5595 170M5446 170M5496 †170M5596 †170M5447 170M5497 ‡170M5597 ‡170M5448 170M5498 ‡170M5598 170M5499 170M5500 170M6538 170M6588 170M6539 170M6589 170M6540 170M6590 170M6541 170M6591 170M6542 170M6592 170M6543 170M6593 170M6544 170M6494 170M6594 170M6545 170M6495 170M6595 ¥170M6496 †170M6596 170M6546 ¥170M6497 ‡170M6597 †170M6547 ¥170M6498 ‡170M6598 †170M6548 ¥170M6499 ‡170M6599 ‡170M6549 170M6500 170M6501 n n n n Watts Loss 15 20 25 30 35 40 45 55 60 65 70 45 50 60 65 70 75 80 85 95 100 65 70 75 80 85 90 95 100 110 115 120 125 135 85 90 95 100 105 110 115 120 125 130 135 140 145 150 -BKN/75 Type K Indicator for Micro 170M3388 170M3389 170M3390 170M3391 170M3392 170M3393 170M3394 170M3395 170M3396 170M3397 170M4388 170M4389 170M4390 170M4391 170M4392 170M4393 170M4394 †170M4395 ‡170M4396 ‡170M4397 170M5388 170M5389 170M5390 170M5391 170M5392 170M5393 170M5394 170M5395 †170M5396 ‡170M5397 ‡170M5398 170M6338 170M6339 170M6340 170M6341 170M6342 170M6343 170M6344 170M6345 †170M6346 ‡170M6347 ‡170M6348 ‡170M6349 R ® Curves -GKN/90 Type K Indicator for Micro BIF # 17056630 17056632 170M5644 170M5645 170M5646 170M5647 170M5648 170M5649 170M5650 17056634 170M6644 170M6645 ¥170M6646 ¥170M6647 ¥170M6648 ¥170M6649 170M6650 170M6651 17056636 Interrupting rating 100kA RMS Symmetrical. 1 kg = 2.2 lbs. Watts loss provided at rated current. Rated voltage (IEC) †1100V ‡1000V ¥1250V (Consult Bussmann for U.L. Recognition/ CSA Component Acceptance status.) Individual Fuse Weight: Size 1* = 0.380 kg Size 1 = 0.580 kg Size 2 = 0.900 kg Size 3 = 1.250 kg n Microswitch indicator ordered separately. 7-11-01 SB01191 1 lb = 0.45 kg Form No. Page 1 of 2 BIF Doc #720031 Bussmann ® Square Body – Flush End Contact R 50-1400A 1250V/1300V (IEC/U.L.) ® Electrical Characteristics Total Clearing I2t The total clearing I2t at rated voltage and at power factor of 15% are given in the electrical characteristics. For other voltages, the clearing I2t is found by multiplying by correction factor, K , given as a function of applied working voltage, E g , (RMS). Arc Voltage This curve gives the peak arc voltage, U L , which may appear across the fuse during its operation as a function of the applied working voltage, E g , (RMS) at a power factor of 15%. Power Losses Watts loss at rated current is given in the electrical characteristics. The curve allows the calculation of the power losses at load currents lower than the rated current . The correction factor, K p , is given as a function of the RMS load current, Ib , in % of the rated current . 1.5 K 1.25 1.0 3 2.5 1.0 Kp 0.8 UL 0.6 0.5 1.8 1.4 0.4 0.5 0.4 103 8 0.3 0.3 6 5 0.2 0.2 4 Eg 400 600 800 Eg 3 400 1000 1200 1400 600 800 Ib 0.1 30 40 50 1000 1200 1400 60 70 80 90 100% -----Dashed lines apply to the following amperages: Size Amp 1* 400 1 500-630 2 630-1000 3 800-1400 Dimensions B Flush End Contact: Type -BKN/-, -GKN/- D A E F E H G Size 1* 1* 1 1 2 2 2 3 3 3 Type BKN + GKN/75 BKN/80 BKN + GKN/75 BKN/80 BKN + GKN/75 BKN/80 BKN + GKN/90 BKN + GKN/75 BKN/80 BKN + GKN/90 A 74 80 74 80 74 80 80 74 81 81 B 75 81 75 81 75 81 91 76 83 91 D 59 59 69 69 77 77 77 92 92 92 E 45 45 53 53 61 61 61 76 76 76 F M8 M8 M8 M8 M10 M10 M10 M12 M12 M12 F§ fiΩ¡§∑ - 18 UNC-2B fiΩ¡§∑ - 18 UNC-2B ‹Ω•∑ - 16 UNC-2B ‹Ω•∑ - 16 UNC-2B ⁄Ω™∑ - 13 UNC-2B ⁄Ω™∑ - 13 UNC-2B G 5 5 8 8 10 10 10 10 10 10 H Ø17 Ø17 Ø20 Ø20 Ø24 Ø24 Ø24 Ø30 Ø30 Ø30 § Valid for fuses type -GKN/Dimension in mm. 1mm = 0.0394∑ 1∑ = 25.4mm The only controlled copy of this BIF document 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. 7-11-01 SB01191 Form No. Page 2 of 2 BIF Doc #720031 ¥