Description:
High speed square body fuses, for the protection of the power rectifier section of the equipment.

Ratings:
Volts: 660Vac
Amps: 1000-4000A
IR: 300kA RMS Sym.
Agency Information: CE, Designed and tested to IEC 60269: Part 4, UL Recognized.

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, Eg, (rms).

Arc Voltage

This curve gives the peak arc voltage, UL, which may appear across the fuse during its operation as a function of the applied working voltage Eg , (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, Kp, is given as a function of the RMS load current, Ib, in % of the rated current.

Features and Benefits
• Low watts loss
• Superior cycling capability

Typical Applications
• Power converters/rectifiers
• Reduced voltage starters

Catalog Numbers:

Fuse Size	Catalog Number						Electrical Characteristics
	-BU/55 Visual Indicator	-BKE/55 Type KIndicator	-BKN/55 Type K Indicator	-GU/55 Visual Indicator	-GKE/55 Type K Indi-cator	-GKN/55 Type K Indicator	Rated Voltage(V)	Rated Current RMS-Amp	I2t (A2Sec)		Watt Loss (W)
									Pre-arc	Clearing at 660V
23	170M6858	170M6898	170M6878	170M6918	170M6958	170M6938	660	1000A	79,000	530,000	170
	170M6859	170M6899	170M6879	170M6919	170M6959	170M6939		1100A	95,000	635,000	185
	170M6860	170M6900	170M6880	170M6920	170M6960	170M6940		1250A	155,000	1,050,000	190
	170M6861	170M6901	170M6881	170M6921	170M6961	170M6941		1400A	200,000	1,350,000	210
	170M6862	170M6902	170M6882	170M6922	170M6962	170M6942		1500A	240,000	1,650,000	215
	170M6863	170M6903	170M6883	170M6923	170M6963	170M6943		1600A	315,000	2,150,000	220
	170M6864	170M6904	170M6884	170M6924	170M6964	170M6944		1800A	450,000	3,050,000	230
	170M6865	170M6905	170M6885	170M6925	170M6965	170M6945		2000A	625,000	4,200,000	240
	170M6866	170M6906	170M6886	170M6926	170M6966	170M6946		2200A	805,000	5,400,000	255
	170M6867	170M6907	170M6887	170M6927	170M6967	170M6947		2500A	1,250,000	8,350,000	265
	170M6868	170M6908	170M6888	170M6928	170M6968	170M6948		3000A	2,250,000	15,500,000	285
	170M6869	170M6909	170M6889	170M6929	170M6969	170M6949	600	3500A	3,450,000	21,000,000	315
	170M6870	170M6910	170M6890	170M6930	170M6970	170M6950	550	4000A	5,000,000	27,500,000	340

Fuse Size	Catalog Number				Electrical Characteristics
	-BU/60 without Indicator	-BKN/60 Type K Indicator	-GU/60 without Indicator	-GKN/60 Type K Indicator	Rated Voltage(V)	Rated Current RMS-Amp	I2t (A2Sec)		Watt Loss (W)
							Pre-arc	Clearing at 660V
24	170M7138	170M7158	170M7198	170M7218	690	2000A	340000	2300000	340
	170M7139	170M7159	170M7199	170M7219		2500A	650000	4350000	390
	170M7140	170M7160	170M7200	170M7220		3000A	1100000	7300000	430
	170M7141	170M7161	170M7201	170M7221		3500A	1800000	12000000	460
	170M7142	170M7162	170M7202	170M7222		4000A	2700000	18000000	490
	170M7143	170M7163	170M7203	170M7223		4500A	3800000	25500000	520
	170M7144	170M7164	170M7204	170M7224		5000A	5450000	36500000	540
	170M7145	170M7165	170M7205	170M7225		5500A	7400000	49500000	560
	170M7146	170M7166	170M7206	170M7226		6000A	9600000	64000000	580
	170M7147	170M7167	170M7207	170M7227		6500A	12500000	83000000	600
	170M7148	170M7168	170M7208	170M7228		7000A	15000000	100000000	630
	170M7149	170M7169	170M7209	170M7229	500	7500A	18500000	†3000000	660

† A2s @ 500V

Size 23 Dimensions (mm):
Type – BU/55, -BKE/55, -BKN/55, -GU/55, -GKE/55, -GKN/55


Size 24 Dimensions (mm):
Type – BU/55, -BKE/55, -BKN/55, -GU/55, -GKE/55, -GKN/55


Time-Current Curve
Size 23 - 10000-4000A: 660V

Size 24 - 2000-7500A: 660V


Peak Let-Through Curve
Size 23 - 10000-4000A: 660V

Size 24 - 2000-7500A: 660V