Littelfuse 501 Series - Manual

© 2013 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 12/19/13
Surface Mount Fuses
Ceramic Fuse > 501 Series
501 Series – High Current 1206 Fast-Acting Fuse
Description
The 501 Series is a 100% Lead-free, RoHS compliant and
Halogen-free fuse series designed specifically to provide
over- current protection to circuits that operate under high
working ambient temperature up to 150°C.
The general design ensures excellent temperature stability
and performance reliability.
The high I
2 t values which is typical in the Littelfuse
Ceramic Fuse family, ensure high inrush current withstand
capability.
Agency Approvals
AgeNCy AgeNCy FIle NumbeR AmpeRe RANge
e10480 10A - 20A
lR29862 10A - 20A
Features
• Operating Temperature
from -55ºC to +150ºC
• Designed to provide
over-current protection
in high current voltage
regulator module (VRM)
applications
• 100% Lead-free, RoHS
compliant and Halogen-
free
• Suitable for both leaded
and lead-free reflow /
wave soldering
Electrical Characteristics for Series
% of Ampere
Rating
Ampere Rating Opening Time at 25ºC
100% 10A – 20A 4 Hours, Minimum
350% 10A – 20A 5 Seconds, Maximum
Applications
• Voltage Regulator
Module (VRM)
Equipment
• Notebook PC
• DC-DC Converter
Ampere
Rating
(A)
Amp
Code
max. Voltage
Rating
(V)
Interrupting
Rating
(DC) 1
Nominal
Resistance
(Ohms) 2
Nominal
melting I 2 T
(A 2 Sec.) 3
Nominal Voltage
Drop At Rated
Current (V) 4
Nominal power
Dissipation At
Rated Current (W)
Agency Approvals
10 010. 32
150 A @ 32 VDC
0.00427 10.385 0.05679 0.5679 x x
12 012. 32 0.00321 20.341 0.04891 0.5870 x x
15 015. 32 0.00250 36.100 0.04605 0.6908 x x
20 020. 32 0.00200 54.760 0.05936 1.1871 x x
Electrical Specifications by Item
Notes:
1. DC Interrupting Rating tested at rated voltage with time constant < 0.5 msec.
2. Nominal Resistance measured with < 10% rated current.
3. Nominal Melting I
2 t measured at 1 msec. opening time. For other I 2 t data refer to chart.
4. Nominal Voltage Drop measured at rated current after temperature has stabilized and
with fuse mounted on board with 3-oz Cu trace.
Devices designed to carry rated current for 4 hours minimum. It is recommended that
devices be operated continuously at no more than 80% rated current. See “Temperature
Rerating Curve”for additional rerating information.
Devices designed to be mounted with marking code facing up.
Additional Information
Datasheet Samples Resources