G11
Siemens Energy & Automation, Inc. 1000 McKee Street Batavia, Illinois 60510
SFIM-7002A-0901
Section G, September, 2001
UL Standard Fuse Classifications
K1
K5
K9
RK1
RK5
J
L
Dimensions
NEC Code
NEC Code
NEC Code
NEC Code
NEC Code
s
s
Amp Rating
0-600
0-600
0-600
0-600
0-600
0-600
601-6000
Range
Interrupting
200,000
200,000
200,000
200,000
200,00
200,000
200,000
Rating RMS Amps
Voltage
250 or 600
250 or 600
250 or 600
250 or 600
250 or 600
600
600
Current Limiting
High
Moderate
Fair
High
Moderate
High
High
Characteristics
Dual Element
No
Yes
Yes
No
Yes
No
Yes
d
Time Delay
Generic Names
Current
Current Limiting Current Limiting
Current
Current Limiting
Current
Current
Limiting
a
Time Delay
a
Time Delay
a
Limiting
Time Delay
Limiting
Limiting
Rejection Type
No
No
No
Yes
Yes
Inherent
Inherent
Manufacturer
Bussman KTN Bussman FRN
Bussman LPN-RK
Bussman FRN-R
Bussman JKS
Bussman KTU
Designations
Bussman KTS Bussman FRS
Bussman KTS-R
Bussman FRS-R
Shawmut A4J Shawmut A4BY
Shawmut A2D
Shawmut TR
Shawmut A4Bt
Shawmut A6D
Shawmut TRS
a
UL does not permit fuses to be marked “current limiting” due to lack of rejection feature.
s
Class J smaller the NEC Code specifications; Class L requires bolt-on fuse blocks. Inherent rejection feature of unique fuse dimensions allows UL marking of
“current limiting” features.
d
Class “L” fuses may be marked “Time Delay” although UL does not investigate Time Delay characteristics of such fuses.
Summary of Contents for TIASTAR SFIM-70020
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