Mersen, formerly Ferraz Shawmut USCC, USM Data Sheet

USCC & USM 24, 48 & 600 VOLT/ULTRASAFE

ULTRASAFE MODULAR FUSE HOLDERS

Ferraz Shawmut ULTRASAFE
and 600 volt Fuse Holders introduce a new level
of safety for Class CC (USCC) and Midget 1-1/2”
x 13/32” (USM) as well as DC rated fuses up to 30
amperes. ULTRASAFE
under IEC and DIN standards to an IP20 grade of
protection, including fuse changing (with the flick of
a finger). ULTRASAFE holders are available in 1, 2,
3 or 4 poles, with or without blown-fuse indicators
in each pole. AC indicators are orange and DC are
red. The multi-pole units can also be made up by
ordering pin-tie handles for field assembly.
ULTRASAFE holders save up to 15% mounting
space and any combination can be snapped onto
35mm DIN rail for extra savings in panel building
time. ULTRASAFE holders with Class CC fuses
chosen for Type “2” protection give one of the
safest protection packages in the industry. Ultrasafe
body material is tough and durable polyamide, with
exceptional insulating properties.

holders qualify as “finger safe”

TM

FUSEHOLDERS

TM

modular 24, 48

HIGHLIGHTS:

Finger Safe

➤

Optional Indicator Lights

➤

DIN Rail Mount

➤

APPLICATIONS:

All circuits up to

➤

600 volts for motors,
control circuits,
transformers, etc.

Compact Footprint

➤

Quick, Easy Fuse Change

➤

➤

Non-load disconnect
12, 24 and 48 volt

➤

DC circuits

RECOMMENDED FUSE USAGE

USCC . . . . . . . . . . . . . . . . use with ATDR*, ATMR, ATQR

USM . . . . . . . . . . . . . . . . . use with ATQ, ATM*, A6Y-2B, A25Z-2,

TRM, OTM, A15QS-2, GFN, GGU, A60Q-2

* Recommended for DC Applications DCT

Ratings

600VAC, 30A

➤

Min. voltage to operate
indicator light:
90VAC 115 VDC
[Less than 0.7 mA
leakage current at 600V]

Special Indicator for

➤

24VDC, 30A

Special Indicator for

➤

48VDC, 30A

Short Circuit Current

➤

Rating: Class CC 200kA,
Midget Fuse 100kA

800VAC, 1000VDC

➤

30A ratings on USM
without indicators

Approvals

All Ultrasafe Fuse Holders

➤

meet the requirements of
UL512

UL Listed

➤

Class CC
Guide IZLT, File E52283

UL Recognized

➤

Component
Midget
Guide IZLT2, File E52283

CSA Certified

➤

Class CC & Midget
C22.2, Class 6225
File 32169

IEC 269

➤

690VAC, 32A
Midget version only.

H 2

H 2

For use with Class CC Fuses

CATALOG NO. DESCRIPTION

USCC1 1 pole
USCC1I 1 pole with indicator
USCC2 2 pole
USCC2I 2 pole with indicators
USCC3 3 pole
USCC3I 3 pole with indicators
USCC3IN 3 pole with indicators and a 4th neutral pole
USCC3N 3 pole with a 4th neutral pole
USCC4 4 pole
USCC4I 4 pole with indicators

For use with Midget (1-1/2” x 13/32”) Fuses

USM1 1 pole
USM1I 1 pole with indicator
USM2 2 pole
USM2I 2 pole with indicators
USM3 3 pole
USM3I 3 pole with indicators
USM3IN 3 pole with indicators and a 4th neutral pole
USM3N 3 pole with a 4th neutral pole
USM4 4 pole
USM4I 4 pole with indicators

TM

FUSEHOLDERS

Special Indicator Options For use with
Low Voltage DC Rated Class CC & Midget Fuses

Neutral Link Pole

USN 1 Pole with Integral Neutral Link

Accessories

USPTH2 Pin-tie handle for 2 poles
USPTH3 Pin-tie handle for 3 poles
USPTH4 Pin-tie handle for 4 poles

Dimensions

DIMENSION mm In

A 17.5 0.69
B 35.0 1.38
C 52.5 2.07
D 70.0 2.76

E 78.0 3.07
F 2.5 0.10
G 78.0 3.07
H 59.0 2.32

I 42.5 1.67
J 5.0 0.20
K 45.0 1.77

PART INDICATOR OPERATING LEAKAGE
NUMBER TYPE VOLTAGE CURRENT

USM1I-DC24 LED 12 to 24 VDC 10mA max.(@24vdc)

USM1I-DC24P LED 20 to 24 VDC 1mA max.(@24vdc)
USM1I-DC48 LED 35 to 48 VDC 10mA max.(@48vdc)
USCC1I-DC24 LED 12 to 24 VDC 10mA max.(@24vdc)
USCC1I-DC48 LED 35 to 48 VDC 10mA max.(@48vdc)

H

H

Terminal screws: Phillips/slot head
Suggested screw torque: 14.75 in-lbs.
Connector type: Pressure plate
Wire range: #6 to #14 (solid/stranded Cu)
Load-break disconnect: No

H 3

H 3