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© 2017 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 03/03/17
Radial Lead Fuses
TR3 > Fast-Acting Fuse > 303 Series
Description
Agency Approvals
Agency Agency File Number Ampere Range
E67006 0.050A - 5A
051378 0.050A - 5A
Features
Electrical Characteristics
% of Ampere
Rating
Opening Time
200 60 Seconds, Maximum
Applications
Electrical Characteristics
Note: 1.00 means the number one with two decimal places. 1,000 means the number one thousand.
303 Series, TR3, Fast-Acting Fuse
Pb
RoHS
Amp
Code
Rated
Current
Voltage
Rating
Breaking
Capacity
Nominal Cold
Resistance
(Ohms)
Voltage
Drop
1.0×I
N
max. (mV)
Power
Dissipation
1.0×I
N
max. (mW)
Melting
Integral
10×I
N
max. (A
2
s)
Approvals
®
0050 50mA 125V
50A @ 125VAC
50A @ 63VDC
2.9203 800 40 0.00007
X X
0063 63mA 125V 2.7400 780 50 0.00013
X X
0080 80mA 125V 2.2300 730 60 0.0002
X X
0100 100mA 125V 4.3800 700 70 0.0004
X X
0125 125mA 125V 3.4605 650 85 0.0022
X X
0160 160mA 125V 2.1687 600 100 0.0029
X X
0200 200mA 125V 1.3500 550 110 0.0042
X X
0250 250mA 125V 1.1500 500 125 0.0082
X X
0315 315mA 125V 0.9645 450 145 0.015
X X
0400 400mA 125V 0.8050 400 160 0.025
X X
0500 500mA 125V 0.5320 380 190 0.042
X X
0630 630mA 125V 0.1448 160 100 0.015
X X
0800 800mA 125V 0.1023 155 125 0.025
X X
110 0 1.00A 125V 0.0830 150 155 0.039
X X
112 5 1.25A 125V 0.0644 145 185 0.059
X X
116 0 1.60A 125V 0.0520 140 225 0.11
X X
1200 2.00A 125V 0.0400 130 260 0.17
X X
1250 2.50A 125V 0.0307 125 315 0.23
X X
1315 3.15A 125V 0.0262 120 380 0.45
X X
1400 4.00A 125V 0.0178 110 440 1. 0
X X
1500 5.00A 125V 0.0131 105 525 1. 5
X X
• Reduced PCB space
requirements
• Direct solderable or
plug-in versions
• Internationally approved
• Low internal resistance
• Shock safe casing
• Vibration resistant
• RoHS compliant, Lead-
Free and Halogen-Free
• Available from 0.050A
to 5A
The 303 Series are TR3, fast-acting type, 125V rated
fuses designed in accordance to UL 248–14.
• Battery chargers
• Consumer electronics
• Power supplies
• Industrial controllers
Application testing is strongly recommended.
Additional Information
Datasheet
Samples
Resources