Special Purpose Fuses
Special Purpose Fuses
American Fuses
Welder Protectors
A4BX
100 A4BX100-150 - J218876 -
125 A4BX125-150 - D212224 -
150 A4BX150-150 - S212743 -
200 A4BX200-150 A4BX200-150J H217334 M217844
225 A4BX225-150 - G211192 -
300 A4BX300-150 A4BX300-150J J215288 K215795
400 A4BX400-150 A4BX400-150J N217845 Y218360
500 A4BX500-150 - M222605 -
600 A4BX600-150 - F201968 -
Ratings
WELDER PROTECTORS
Ferraz Shawmut Welder Protectors are special
purpose limiters used to provide isolation of faulted welding equipment
and protection for the cable drop supplying the welder. Welder
Protectors have a high thermal capacity and are less affected by high
ambient temperatures and extended weld times than similar size Class J
or K fuses*. Welder Protectors should only be applied for isolation of
short circuited welding circuits. Overload protection must be provided
for by other means.
* Contact us for Class L sizes and rating
Approvals
• 600VAC, 200kA I.R. • Ferraz Shawmut Certified
Standard Fuse Ampere Ratings, Reference Numbers
125-200 5-3/4 1-1/2 3/16 1-1/8 1-1/2 4-3/8 3/8 9/32
225-400 7-1/8 2 1/4 1-5/8 2-3/16 5-1/4 17/32 13/32
CLASS JCLASS K
Catalog Number Reference Number
Ampere Class K Class J Class K Class J
Rating Dimension Dimension Dimension Dimension
SP22
12/04
A4BX ( ) - 150; Class K Dimensions
100 7-7/8 1 1/8 23/32 2-5/8 - - -
125-200 9-5/8 1-1/2 3/16 1-1/8 3-7/16 - - -
225-400 11-5/8 2 1/4 1-5/8 4-7/16 - - -
500-600 13-3/8 2-1/2 1/4 2 5-5/16 - - -
Ampere Inches
Rating A B C D E F G H
A4BX ( ) - 150J; Class J Dimensions
Special Purpose Fuses
Special Purpose Fuses
SP23
American Fuses
Welder Protectors
A4BX
12/04
MELTING TIME - CURRENT DATA, 600V FUSES
CURRENT IN AMPERES
TIME IN SECONDS
AVAILABLE CURRENT IN RMS SYMMETRICAL AMPERES
MAXIMUM INSTANTANEOUS PEAK LET-THRU AMPERES
Peak Let-Thru Current Data – A4BX100 to 600, 600 Volts AC
A4BX100 to 600 Types 150, 150J
