General Purpose US Fuses
General Purpose US Fuses
GPUS41
American Power Fuses
AMP-TRAP®
A4BT (Class L TD)
12/04
when your heavier loads need
protection A4BT fuses
won’t let you down
The high interrupting rating of A4BT current
limiting fuses is ideally suited for protecting mains,
feeders, and general circuits. The 10-second time delay
at 500% of fuse rating is ideal for large motors and
other loads with a high inrush. A4BT fuses are suitable
for DC applications up to 500VDC. An A4BT fuse can
be applied to normal loads up to its full ampere rating
to allow 100% rating of equipment.
Features/Benefits
• Unique dimensions prevent replacement
by other fuse classes.
• Blade-stamped catalog numbers for permanent
identification
• Glass melamine body and plated terminal provide
superior reliability in harsh environments
Ratings
AC: 200 to 2,000A
600VAC, 200kA I.R.
DC: 200 to 2,000A
500VDC, 100kA I.R.
Highlights
• Current-Limiting
• Full 10-Second Delay
• DC Ratings
• Uniform Characteristics in all Ampere
Ratings
Applications
• Motors
• Motor Controllers
• Transformers
• Panelboards
• Mains
• Feeders
Approvals
• UL Listed to Standard 248-10
(601-2000A)
• CSA Certified to Standard C22.2
No. 248.10 (601-2000A)
• DC Tested to UL 198L limits (601-2000A)
General Purpose US Fuses
General Purpose US Fuses
GPUS42
American Power Fuses
AMP-TRAP®
A4BT (Class L TD)
12/04
Ampere Catalog Ampere Catalog Ampere Catalog
Rating Number Rating Number Rating Number
200 A4BT200 601 A4BT601 1100 A4BT1100
250 A4BT250 650 A4BT650 1200 A4BT1200
300 A4BT300 700 A4BT700 1400 A4BT1400
350 A4BT350 750 A4BT750 1500 A4BT1500
400 A4BT400 800 A4BT800 1600 A4BT1600
500 A4BT500 900 A4BT900 1800 A4BT1800
600 A4BT600 1000 A4BT1000 2000 A4BT2000
Ampere Ref. Ampere Ref. Ampere Ref.
Rating Number Rating Number Rating Number
200 W212723 601 Z218338 1100 J200890
250 E214249 650 L218855 1200 W201430
300 G214757 700 A219374 1400 G201946
350 L215773 750 X219900 1500 G211169
400 R216284 800 N222583 1600 Z211691
500 J217312 900 K200891 1800 F212203
600 N217822 1000 M222582 2000 F213238
801-2000A
200-800A
400 382 601 700
500 472 700 1000
Standard Fuse Ampere Ratings,
Reference Numbers
Standard Fuse Ampere Ratings,
Catalog Numbers 460 Volt Three Phase Motors
Three Phase Motor Fuse Selection
Full Recommended A4BT Ampere Rating
Motor Load Motor Acceleration Times
HPAmperes Typical
Heavy Load at 460V 5 seconds Over 5 seconds
300 360 601 700
Ampere A B C D E
Rating In. mm In. mm In. mm In. mm In. mm
200-600 8-5/8 219 2 51 5/16 8 1-5/8 41 2-13/32 61
601-800 8-5/8 219 2-1/2 63 3/8 9 2 51 2-13/32 61
801-1200 10-3/4 273 2-1/2 63 3/8 9 2 51 3-15/32 88
1201-1600 10-3/4 273 3 76 7/16 11 2-3/8 60 3-15/32 88
1601-2000 10-3/4 273 3-1/2 89 1/2 13 2-3/4 70 3-15/32 88
Dimensions
Safety Note:
Class L fuses are dimensioned for one-way interchangeability.
A Class L fuse of any lower ampere rating can be substituted for a given Class L fuse.
575 Volt Three Phase Motors
General Purpose US Fuses
General Purpose US Fuses
GPUS43
American Power Fuses
AMP-TRAP®
A4BT (Class L TD)
12/04
TIME IN SECONDS
AVAILABLE CURRENT IN RMS SYMMETRICAL AMPERES
MELTING TIME – CURRENT DATA, 600V AC/500V DC FUSES
A4BT 200 to 2000
Peak Let-Thru Current Data – A4BT 300 to 2000, 600 Volts AC
