• Optional insulation sleeve is flexible flouropolymer
(UL Flammability rating VW-1).
• UL Listed product meets standard UL 248-14
Rated Current
100mA-5A
Electrical Characteristics
Amp Rating
Opening Time
100%
None
135%
60 minutes max.
200%
2 seconds max.
Dimensions - mm
Drawing Not to Scale
Agency Information
• UL Recognition Card: Guide JDYX2, File E19180
• CSA Certification Card: Class 1422-01, File 53787
Ordering
Specify product code
• Insert packaging code prefix before part number. E.g.
BK (or TR2)/C518-2-R
Specify option code, if desired
• For insulation sleeve, insert “S” after part series. E.g.
BK/C518S-2-R
• With TR2 packaging code, lead wire length is 20.3mm
Specifications
Part Number
C518-100-R
C518-125-R
C518-250-R
C518-375-R
C518-500-R
C518-750-R
C518-1.5-R
C518-2-R
C518-2.5-R
C518-3-R
C518-3.5-R
C518-4-R
C518-5-R
Voltage
Rating
Vac
250
250
250
250
250
250
250
250
250
250
250
250
250
Interrupting Rating
at Rated Voltage (amps)
250Vac
125Vac
35
10,000
35
10,000
35
10,000
35
10,000
35
10,000
35
10,000
100
10,000
100
10,000
100
10,000
100
10,000
100
10,000
200
10,000
200
10,000
Typical DC Cold
Resistance*
Ω
(Ω)
22.30
15.20
5.66
2.53
1.66
0.91
0.900
0.064
0.046
0.038
0.032
0.022
0.018
Typical
Melting I
2
t**
AC
0.0010
0.0019
0.012
0.039
0.059
0.264
0.800
1.9
2.9
6.1
9.7
16.6
22.4
Max
Voltage
Drop (mV)***
2230
1930
1450
968
845
686
135
136
121
116
115
88
91
* DC Cold Resistance (Measured at <10% of rated current)
** Typical Melting I
2
t (A
2
Sec) (Minimum at 10 times rated current)
*** Typical Voltage Drop (Voltage drop was measured at 20°C ambient temperature at rated current)
0909
BU-SB09718
Page 1 of 2
Data Sheet 2026
Time-Current Curve
Packaging Code
Packaging Code Prefix
BK
TR2
Description
100 fuses packed into a cardboard carton
1,500 fuses packed into tape on a reel (20.3mm lead wire length)
Option Code
Option Code
S
Description
Insulation Sleeve
The only controlled copy of this Data Sheet is the electronic read-only version located on the Cooper Bussmann Network Drive. All other copies of this document are by definition uncontrolled. This bulletin is
intended to clearly present comprehensive product data and provide technical information that will help the end user with design applications. Cooper Bussmann reserves the right, without notice, to change
design or construction of any products and to discontinue or limit distribution of any products. Cooper Bussmann also reserves the right to change or update, without notice, any technical information contained
in this bulletin. Once a product has been selected, it should be tested by the user in all possible applications.
Life Support Policy: Cooper Bussmann does not authorize the use of any of its products for use in life support devices or systems without the express written approval of an officer of the Company. Life support
systems are devices which support or sustain life, and whose failure to perform, when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in
