Slow Blow Fuses
RoHS-compliant Slow Blow Fuses feature industry standard
1206 chip sizes, high reliability and strong arc suppression
characteristics. The fuse's monolithic, multilayer design helps
provide some of the highest current ratings available in the
1206 footprint and enhances high temperature performance
in a wide range of circuit protection designs. Designed for DC
power applications of up to 63V such as protection of power
DC
supplies, capacitor filter banks, LCD backlight inverters, electric
motors and portable electronics.
Benefits Features
Time delayed design prevents nuisance openings RoHS compliant
in pulsed and high inrush current applications
Monolithic multilayer design
Small size with high current ratings
High temperature performance
Strong arc suppression characteristics
-55C to +125C operating temperature range
Applications
Small motors systems Power over Ethernet (POE) Computer drives
Portable electronics Test Equipment Displays
Input power ports POL Converter Protection Printers
69Slow Blow Fuses
Table FS1 - Clear Time Characteristics for Slow Blow Fuses
% of Current Rating Clear time at 25C
100% 4 hours (min.)
200% 1 second (min.) 120 seconds (max.)
300% 0.1 second (min.) 3 seconds (max.)
800% 0.002 second (min.) 0.05 seconds (max.)
Table FS2 - Interrupt Ratings for Slow Blow Fuses
Interrupt Ratings:
1A 5.5A 50A @ rated voltage
6A 8.0A 60A @ rated voltage
Table FS3 - Typical Electrical Characteristics, Dimensions and Recommended Pad Layout for Slow Blow Fuses
1206 (3216mm) Slow Blow Fuses
Part Typical Electrical
Number Characteristics*
0.063 0.008
Rated Nominal Nominal
Shape and
(1.60 0.20) Voltage
Dimensions
Current Cold DCR I2t
0.126 0.008
Inch (mm) (V )
(3.20 0.20)
DC
(A) ()* (A2sec)
1206SFS100F/63 1.0 0.360 0.11
1206SFS125F/63 1.25 0.200 0.22
0.038 0.008
63
1206SFS150F/63 1.5 0.150 0.23
(0.97 0.20)
1206SFS200F/63 2.0 0.082 0.63
1206SFS250F/32 2.5 0.070 0.90
1206SFS300F/32 3.0 0.032 1.20
0.020 0.010
(0.51 0.25)
1206SFS350F/32 3.5 0.028 1.60
32
1206SFS400F/32 4.0 0.024 2.20
0.173
Recommended
1206SFS450F/32 4.5 0.020 3.60
Pad layout
(4.40)
1206SFS500F/32 5.0 0.016 5.30
Inch (mm)
0.059
1206SFS550F/24 5.5 0.014 6.40
(1.50)
1206SFS600F/24 6.0 0.011 8.50
0.071
24
1206SFS700F/24 7.0 0.010 10.00
(1.80)
1206SFS800F/24 8.0 0.009 16.90
0.057
* Measured at 10% of rated current and 25C
(1.45)
Melting I2t at 0.001 sec clear time
Table FS4 - Environmental and Material Specifications for Slow Blow Fuses
Environmental Specifications
Operating Temperature -55C to +125C
Mechanical Vibration Withstands 5-3000 Hz at 30 Gs when evaluated per Method 204 of MIL-STD-202
Mechanical Shock Withstands 1500 Gs, 0.5 millisecond half-sine pulses when evaluated per Method 213 of MIL-STD-202
Thermal Shock Withstands 100 cycles from -65C to +125C when evaluated per Method 107 of MIL-STD-202
Resistance to Soldering Heat Withstands 60 seconds at +260C when evaluated per Method 210 of MIL-STD-202
Solderbility Meets 95% minimum coverage requirement when evaluated per Method 208 of MIL-STD-202
Moisture Resistance Withstands 10 cycles when evaluated per Method 106 of MIL-STD-202
Salt Spray Withstands 48-hour exposure when evaluated per Method 101 of MIL-STD-202
Material Specifications
Construction Body Material Ceramic
Termination Material Silver, Nickel, Tin
Fuse Element Silver
Terminal Strength: Hanging test 1.5kg, 30 seconds
70