2
Technical Data 10572
Effective February 2017
1025HC
Fast-acting, high current, surface mount ceramic tube fuses
www.eaton.com/electronics
Electrical characteristics
% of Amp Rating Opening Time
100 4 hours minimum
200 60 s maximum
Product specifications
Part number
4
Current
rating
(A)
Voltage
rating
(V
AC
)
Voltage
rating
(V
DC
)
Interrupting
rating at rated
volt age
(A
AC
)
Interrupting
rating at rated
voltage
1
(A
DC
)
Typical DC
cold resistance
2
(mW )
Typical
melting
3
I
2
t (A
2
s) Part marking cURus PSE
1025HC20-R 20 250 72 100 500 3.1 25 <PS> E JET
BUSS 20A
x x
1025HC25-R 25 250 72 100 500 2.6 50 <PS> E JET
BUSS 25A
x x
1025HC30-R 30 250 72 100 500 1.7 112 <PS> E JET
BUSS 30A
x x
1025HC40-R 40 250 72 100 500 1.3 400 BUSS 40A x
1025HC50-R 50 NA 60 NA 600 1.1 600 BUSS 50A x
1 DC interrupting rating measured at rated voltage, time constant of less than 1.0 microseconds, battery source
2 Typical DC cold resistance measured at <10% of rated current at an ambient temperature of 20 °C (reference only)
3. Typical melting I²t value is measured at 10In rated current
4. Part number definition: 1025HCxx-R
1025HC= Product code and size
xx= Ampere rating
-R= Rohs compliant
Dimensions (mm)
Rating A B C
20 A to 30 A 10.0 ±0.50 3.15 ±0.15 1.70 ±0.15
40 A to 50 A 12.4 ±0.50 4.50 ±0.15 2.70 ±0.15
Recommended pad layout (mm)
Recommended trace thickness is 3 oz.
Recommended min-trace width is 10 mm (20 A to 30 A) and 15 mm (40 A to 50 A)
20 A to 30 A 40 A to 50 A
