Mersen, formerly Ferraz Shawmut AJT Catalog Page

SMARTSPOT INDICATOR AMP-TRAP 2000®

AJT

HIGHLIGHTS:

Smart Spot Indicator

➤

Time Delay

➤

Highly Current Limiting

➤

Arc Flash Mitigating

➤

DC Ratings

➤

Optional Mechanical

➤

Indicator (70 to 600A
fuses)

APPLICATIONS:

Motor Circuits

➤

Mains

➤

Feeders

➤

Branch Circuits

➤

Lighting, Heating &

➤

General Loads
Transformers

➤

Control Panels

➤

Circuit Breaker Back-up

➤

Bus Duct

➤

Load Centers

➤

Note: See Motor Fuse

➤

Applications Tables on
page L9

TIME DELAY/CLASS J

SMARTSPOT® WITH MaxiMuM CIRCUIT
PROTECTION

Amp-trap 2000® SmartSpot® AJT fuses now
provide a visual open fuse indicator. With advanced
material technology added to the existing product
line the AJT fuse provides IEC Type “2” (No Damage)
protection to main, feeder, and branch circuits, for
all types of loads — yet, they require only half the
mounting space needed for 600VAC Class RK fuses.
AJT’s time delay characteristics for handling typical
in-rush currents, its current limiting ability.

Features/Benefits

Solid State SmartSpot Indicator

➤

Time delay for motor starting and transformer inrush

➤

300kA interrupting rating - self-certified,

➤

UL witnessed tests
Extremely current limiting for low peak let-thru current

➤

Most current limiting UL class fuse

➤

Recommended for Arc Flash energy reduction

➤

Small footprint requires less mounting space and

➤

allows smaller, more economical fuse blocks
Easy 2-to-1 selectivity for prevention of nuisance

➤

shutdowns
Unique Class J dimensions prevent replacement errors

➤

High-visibility orange label gives instant recognition

➤

Metal-embossed date and catalog number for

➤

traceability and lasting identification
Fiberglass body provides dimensional stability in harsh

➤

industrial settings
High-grade silica filler ensures fast arc quenching

➤

Optional EI Indicator/Switch mount for AJT70 to



➤

600 open fuse indication

Ratings

➤

AC: 1 to 600A

600VAC, 200kA I.R.
(self certified for
600VAC, 300kA I.R.,
UL witnessed)

DC: 1 to 600A
500VDC, 100kA I.R.

Approvals

AJT (1-600):

➤ UL Listed to

Standard 248-8
File E2137

➤ DC Listed to UL

Standard 248

➤ CSA Certified to

Standard C22.2
No. 248.8

➤ IEC 269-2-1

AJT (70-600) EI:

➤ UL Listed to File E60314
➤ DC Tested to UL

Standard 248

A 2A 2

SMARTSPOT INDICATOR AMP-TRAP 2000

®

TIME DELAY/CLASS J FUSES

Standard Fuse Ampere Ratings, Catalog Numbers

AMPERE CATALOG AMPERE CATALOG AMPERE CATALOG AMPERE CATALOG

RATING NUMBER RATING NUMBER RATING NUMBER RATING NUMBER

1 AJT1 4-1/2 AJT4-1/2 25 AJT25 125 AJT125
1-1/4 AJT1-1/4 5 AJT5 30 AJT30 150 AJT150
1-1/2 AJT1-1/2 5-6/10 AJT5-6/10 35 AJT35 175 AJT175
1-6/10 AJT1-6/10 6 AJT6 40 AJT40 200 AJT200
1-8/10 AJT1-8/10 6-1/4 AJT6-1/4 45 AJT45 225 AJT225
2 AJT2 7 AJT7 50 AJT50 250 AJT250
2-1/4 AJT2-1/4 8 AJT8 60 AJT60 300 AJT300
2-1/2 AJT2-1/2 9 AJT9 70 AJT70 350 AJT350
2-8/10 AJT2-8/10 10 AJT10 80 AJT80 400 AJT400
3 AJT3 12 AJT12 90 AJT90 450 AJT450
3-2/10 AJT3-2/10 15 AJT15 100 AJT100 500 AJT500
3-1/2 AJT3-1/2 17-1/2 AJT17-1/2 110 AJT110 600 AJT600
4 AJT4 20 AJT20

Note: Indicator Not Available (1-7A)

Recommended Fuse Blocks
With Box Connectors for

Amp-trap® Class J Fuses

Fuse Catalog Number
Ampere 600V OR LESS
Rating 1 Pole 3 pole

0-30

31-60 US6J1I US6J3I
61-100 61036J 61038J

101-200 62001J 62003J
201-400 64031J 64033J
401-600 6631J 6633J

A variety of pole configurations and termination
provisions is available.

AJT

A

US3J1I US3J3I

1-60A

70-600A

Dimensions

AMPERE A B C D E F G H
RATING In. mm In. mm In. mm In. mm In. mm In. mm In. mm In. mm

1-30 2-1/4 57 13/16 21 - - - - - - - - - - - ­ 31-60 2-3/8 60 1-1/16 27 - - - - - - - - - - - ­ 61-100 4-5/8 117 1-1/16 27 1/8 3.2 3/4 19 1 25 3-5/8 92 3/8 10 9/32 7
101-200 5-3/4 146 1-5/8 41 3/16 4.8 1-1/8 29 1-3/8 35 4-3/8 111 3/8 10 9/32 7
201-400 7-1/8 181 2-1/8 54 1/4 6.3 1-5/8 41 1-7/8 48 5-1/4 133 17/32 14 13/32 10
401-600 8 203 2-1/2 64 3/8 9.5 2 51 2-1/8 54 6 152 11/16 18 17/32 13

Optional Indicator/Microswitch Mount (EI) dimensions:

Note: Fuses with the EI option are designed

to work with the AOS-S or AOS-Q add-on

Switch, which is ordered separately.

See page J7 for details.

CATALOG NUMBER A

AJT(70-100)-EI

(71.0)

AJT(110-200)-EI

(81.8)

AJT(225-400)-EI

(82.2)

AJT(450-600)-E

(91.8)

2.80

3.22

3.24

3.61

I

A 3AA 3