form no. page 1 of 2 bif doc #720032 bussmann rev. 6/29/98 square body ?us style 1250v/1300v (iec/u.l.) 50-1400a electrical characteristics ordering information curves -fke/115 rated i 2 t (a 2 s) -fu/115 type k carton see page current clearing clearing watts visual indicator carton weight or size rms-amps pre-arc at 1000v at 1250v loss indicator for micro qty. (kg) (bif #) 50 135 815 1100 15 170m3688 170m3738 63 215 1300 1750 20 170m3689 170m3739 80 420 2500 3350 25 170m3690 170m3740 100 750 4450 5950 30 170m3691 170m3741 125 1450 9000 11500 35 170m3692 170m3742 page 63 1* 160 2600 16000 21000 40 170m3693 170m3743 1 0.425 (17056630) 200 5150 31000 41000 45 170m3694 170m3744 250 9200 54500 73000 55 170m3695 170m3745 315 18500 115000 150000 60 170m3696 170m3746 350 27000 165000 220000 65 170m3697 170m3747 160 1900 11500 15500 45 170m4688 170m4738 200 3800 22500 30000 50 170m4689 170m4739 250 7750 46000 61500 60 170m4690 170m4740 315 15000 90000 120000 65 170m4691 170m4741 1 350 20000 125000 165000 70 170m4692 170m4742 page 64 400 29500 175000 235000 75 170m4693 170m4743 1 0.675 (17056632) 450 42000 250000 335000 80 170m4694 170m4744 ?500 69500 340000 85 170m4695 170m4745 ?550 95000 465000 95 170m4696 170m4746 ?30 130000 660000 100 170m4697 170m4747 250 6500 38500 51500 65 170m5688 170m5738 280 9350 55500 74500 70 170m5689 170m5739 315 13000 77500 105000 75 170m5690 170m5740 350 16500 97500 135000 80 170m5691 170m5741 400 23000 140000 180000 85 170m5692 170m5742 450 34000 205000 270000 90 170m5693 170m5743 page 64 2 500 48000 285000 380000 95 170m5694 170m5744 1 0.740 (17056634) 550 62000 370000 495000 100 170m5695 170m5745 630 115000 575000 730000 110 170m5696 170m5746 ?700 160000 795000 115 170m5697 170m5747 ?800 245000 1200000 120 170m5698 170m5748 ?00 360000 1750000 125 170m5699 170m5749 ?000 480000 2350000 135 170m5700 170m5750 315 9500 58000 77500 185 170m6688 170m6738 350 13500 81500 110000 90 170m6689 170m6739 400 19500 120000 160000 95 170m6690 170m6740 450 31000 185000 245000 100 170m6691 170m6741 500 39000 235000 310000 105 170m6692 170m6742 550 55000 325000 435000 110 170m6693 170m6743 630 83500 495000 665000 115 170m6694 170m6744 page 65 3 700 115000 705000 940000 120 170m6695 170m6745 1 1.250 (17056636) 800 205000 995000 1300000 125 170m6696 170m6746 900 305000 1500000 1900000 130 170M6697 170m6747 ?000 450000 2150000 135 ?170m6698 ?170m6748 ?100 575000 2800000 140 ?170m6699 ?170m6749 ?250 810000 3950000 145 ?70m6700 ?70m6750 ?400 1250000 6000000 150 ?70m6701 ?70m6751 n interrupting rating 300ka rms symmetrical. 1 kg = 2.2 lbs. 1 lb = 0.45 kg n watts loss provided at rated current. n rated voltage (iec) ?1100 ?000v (consult bussmann for u.l. recognition status.) n microswitch indicator ordered separately. see accessories on pages 58-59. u.l. recognition at 1000v.
form no. page 2 of 2 bif doc #720032 bussmann this bulletin is intended to clearly present comprehensive product data and provide technical information that will help the en d 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. buss mann 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. rev. 6/29/98 square body ?us style 1250v/1300v (iec/u.l.) 50-1400a total clearing i 2 t the total clearing i 2 t at rated voltage and at power factor of 15% are given in the electrical characteristics. for other volt- ages, the clearing i 2 t is found by multi- plying 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, i b , in % of the rated current . electrical characteristics b c2 d e e 6 h i c1 74 size b c1 c2 d e h i 1* 156 130 101 59 45 20 10 1 160 127 102 69 53 25 14 2 160 127 102 77 61 25 14 3 159 128 101 92 76 36 16 dimension in mm. 1mm = 0.0394 1 = 25.4mm dimensions us style: type -fu/115, -fke/115 k 1.5 1.0 1.25 0.5 0.4 0.3 0.2 400 600 800 1000 1200 1400 e g u l 3 2.5 8 10 3 1.4 1.8 6 4 5 3 400 600 800 1000 1200 1400 e g k p 30 40 50 60 70 80 90 100% i b 1.0 0.8 0.4 0.5 0.6 0.3 0.2 0.1 - - - - - - dashed lines apply to the following amperages: size 1* 1 2 3 amp 400 500-630 630-1000 800-1400
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