Description:
Square body flush end contact high speed fuses.

Ratings:
Volts: 1000Vac.
Amps: 50A-1400A
IR: 150kA (Est. 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
• Excellent DC performance
• Low arc voltage and low energy let-through (I2t)
• Low watts loss
• Superior cycling capability

Typical Applications
• DC common bus
• DC drives
• Power converters/rectifiers
• Reduced voltage starters

Dimensions (mm)
Type –BKN/- and –GKN/-



Catalog Numbers

Catalog Numbers		Size	Electrical Characteristics
-BKN/- Type K Indicator for Micro	-GKN/- Type K Indicator for Micro		Rated Voltage	Rated Current RMS-Amps	I2t(A2 Sec)		Watts Loss
					Pre-arc	Clearing at Rated Voltage
170M3951	170M3921	1*	1000	50A	135	815	20
170M3952	170M3922			63A	215	1300	25
170M3953	170M3923			80A	460	2750	30
170M3954	170M3924			100A	860	5100	35
170M3955	170M3925			125A	1450	8600	40
170M3956	170M3926			160A	2850	17500	45
170M3957	170M3927			200A	4950	29500	48
170M3958	170M3928			250A	9550	57000	50
170M3959	170M3929			315A	21500	130000	60
170M3960	170M3930			350A	29000	175000	65
170M3961	170M3931			400A	42000	250000	70
170M4951	170M4921	1		160A	2200	13500	40
170M4952	170M4922			200A	4150	24500	45
170M4953	170M4923			250A	7750	46000	52
170M4954	170M4924			315A	16500	98500	60
170M4955	170M4925			350A	21500	130000	65
170M4956	170M4926			400A	31000	185000	70
170M4957	170M4927			450A	44500	265000	80
170M4958	170M4928			500A	63000	375000	85
170M4959	170M4929			550A	84500	500000	90
170M4960	170M4930			630A	125000	755000	98
170M5952	170M5922	2		250A	6750	40000	65
170M5953	170M5923			315A	13500	81500	75
170M5954	170M5924			350A	16500	99000	80
170M5955	170M5925			400A	26000	155000	85
170M5956	170M5926			450A	35500	210000	90
170M5957	170M5927			500A	49500	295000	95
170M5958	170M5928			550A	66000	390000	100
170M5959	170M5929			630A	93500	555000	110
170M5960	170M5930			700A	130000	770000	115
170M5961	170M5931			800A	195000	1200000	125
170M8600	170M8500	3		315A	9200	54500	90
170M8601	170M8501			350A	13000	77500	95
170M8602	170M8502			400A	19000	115000	105
170M8603	170M8503			450A	27000	160000	107
170M8604	170M8504			500A	37500	225000	110
170M8605	170M8505			550A	52000	310000	115
170M8606	170M8506			630A	82500	490000	120
170M8607	170M8507			700A	115000	700000	125
170M8608	170M8508			800A	170000	1050000	135
170M8609	170M8509			900A	250000	1500000	145
170M8610	170M8510			1000A	340000	2050000	150
170M8611	170M8511			1100A	460000	2750000	155
170M8612**	170M8512**			1250A	575000	3400000	175
170M8613**	170M8513**		900	1400A	795000	4200000	185

**Overall length is 90mm, for all other fuses the overall length is 75mm.
• Watts loss provided at rated current.
• Microswitch ordered separately.

Time-Current Curve
Size 1* — 50-400A: 1000V

Size 1 — 50-400A: 1000V

Size 2 — 50-400A: 1000V

Size 3 — 50-400A: 1000V

Peak Let-Through Curve
Size 1* — 50-400A: 1000V

Size 1 — 50-400A: 1000V

Size 2 — 50-400A: 1000V

Size 3 — 50-400A: 1000V