Mersen, formerly Ferraz Shawmut NIT, NS Catalog Page

NIT & NS HRCII/CANADIAN FUSES

CANADIAN HRCII FUSES

The Ferraz Shawmut Canadian NIT fuses
series has offset contacts with British
standard (BS88) dimensions. The NS
series has diagonally offset contacts with
British standard dimensions. Neither fuse
is dimensionally interchangeable with
other North American fuses. They are for
short-circuit protection only, in motor
controllers, for example, where overload
protection is provided by an overload
relay.

HIGHLIGHTS:

‰BS88 Dimensions➤

APPLICATIONS:

‰Motor Circuits➤

NIT – Catalog Numbers & Dimensions

AMPERE CATALOG DIMENSIONS in mm
RATING NUMBER A B D E F G H K
2 NIT2

4 NIT4
6 NIT6 36.5 14.1 55.6 11.1 0.80 44.5 4.70 14.3
10 NIT10
16 NIT16
20 NIT20

NIT & NS – I2t at 80kA

AMPERE I

NUMBER PRE-ARC @ 415V @ 550V
2 2.2 5.4 31

4 7.2 18 75
6 22 60 400
10 100 280 1000
16 300 850 2000
20 540 1000 2500

2

t (A2 Secs.)

Ratings

NIT

➤

AC: 2 to 20A
550VAC, 80kA I.R.
DC: 2 to 20A
250VDC, 40kA I.R.

NS

➤

AC: 2 to 32A
440VAC, 80kA I.R.
DC: 2 to 32A
250VDC, 40kA I.R.

Approvals

HRCII-MISC

➤

IEC269-2-1

➤

NS – Catalog Numbers & Dimensions

AMPERE CATALOG DIMENSIONS in mm
RATING NUMBER A B D E F N
2 NS2

4 NS4
6 NS6
10 NS10 35.5 14.5 62.0 11.0 0.80 3.60
16 NS16
20 NS20
25 NS25
32 NS32

FF

F 37

NIT & NS HRCII/CANADIAN FUSES

Peak Let-Thru Current Data – NIT2-20, NS2-32

Maximum Instantaneous Peak Let-Thru Amperes

Available Current in RMS Symmetrical Amperes

Melting Time - Current Data – NIT2-20, NS2-32

Time in Seconds

Current in Amperes

F 38