Slow Blow Surface Mounted Fuse 30A 250V was designed as UL 248-14,anti-surge type with high current rating up to 60A and voltage rating is 125V 250V AC, small size 10.25x3.2mm , it is ideal for electronic board protection solution such as LED driver and Power supply.
1032 NANO High Inrush Gold Plated Ceramic Slow Blow Surface Mount Fuse 30A 250V
Typical Application Explanation of Slow Blow Surface Mounted Fuse 30A 250V
Computers & Peripherals
PC/ Laptop/ Audio-video devices
Market for computer and its peripherals products in both home and business has reached a mature and stable status. Being a leading passive components manufacturer, Walter offers numerous solutions applicable for server power, desktop power, and power adaptors in general for all kinds of power range.
Dimension of Slow Blow Surface Mounted Fuse 30A 250V (mm)
NO. |
Part Name |
Material |
1 |
End caps |
Au Plated Brass Cap |
2 |
Body |
Non-Transparent Square Ceramic Tube |
3 |
Fuse element |
Cu-Ag Alloy wire |
Electrical Parameters of Slow Blow Surface Mounted Fuse 30A 250V
P/N |
Ampere Rating |
Voltage Rating |
Breaking Capacity |
Nominal Cold Resistance (Ohms) |
I2TMelting Integral(A2.S) |
R1032.0200 |
200mA |
125VAC 250VAC |
50A@300VAC 50A@250VAC 200A@125VAC |
0.920 |
0.125 |
R1032.0250 |
250mA |
0.860 |
0.145 |
||
R1032.0300 |
300mA |
0.620 |
0.162 |
||
R1032.0315 |
315mA |
0.550 |
0.189 |
||
R1032.0375 |
375mA |
0.470 |
0.200 |
||
R1032.0400 |
400mA |
0.380 |
0.238 |
||
R1032.0500 |
500mA |
0.320 |
0.275 |
||
R1032.0600 |
600mA |
0.285 |
0.470 |
||
R1032.0630 |
630mA |
0.256 |
0.566 |
||
R1032.0700 |
700mA |
0.208 |
0.805 |
||
R1032.0750 |
750mA |
0.175 |
1.240 |
||
R1032.0800 |
800mA |
0.155 |
1.880 |
||
R1032.1100 |
1A |
0.148 |
3.500 |
||
R1032.1125 |
1.25A |
0.102 |
4.760 |
||
R1032.1150 |
1.5A |
0.085 |
6.305 |
||
R1032.1160 |
1.6A |
0.075 |
6.505 |
||
R1032.1200 |
2A |
0.044 |
8.950 |
||
R1032.1250 |
2.5A |
0.043 |
16.025 |
||
R1032.1300 |
3A |
0.033 |
21.560 |
||
R1032.1315 |
3.15A |
0.029 |
22.750 |
||
R1032.1350 |
3.5A |
0.027 |
27.050 |
||
R1032.1400 |
4A |
0.025 |
31.808 |
||
R1032.1500 |
5A |
0.019 |
40.250 |
||
R1032.1600 |
6A |
0.018 |
67.245 |
||
R1032.1630 |
6.3A |
0.017 |
73.550 |
||
R1032.1700 |
7A |
0.015 |
76.280 |
||
R1032.2100 |
10A |
0.013 |
77.350 |
||
R1032.2120 |
12A |
0.012 |
78.180 |
||
R1032.2150 |
15A |
0.011 |
79.280 |
||
R1032.2200 |
20A |
0.011 |
80.180 |
||
R1032.2250 |
25A |
0.010 |
83.350 |
||
R1032.2300 |
30A |
0.010 |
90.080 |
Product Features of Slow Blow Surface Mounted Fuse 30A 250V
Materials |
Body : ceramic tube Cap : brass with gold plated Element : alloy |
Operating Temperature |
-55℃ to +125℃ (consider de-rating) |
Solderability |
T =235℃±5℃, t =5+0/-0.5s, Cover≧95% |
Resistance to Soldering Heat |
T =260℃±5℃, t =10s ±1s |
Recommended Soldering Parameters |
260℃, 10s Max. (solder-reflow) |
Storage Conditions |
Can be stored for 2 years under tight seal condition at temperature of +10℃~40℃, relative humidity≤ 75%. At most can be kept 30 days at temperature +10℃~40℃, relative humidity≤ 95% under covered conditions. |
Standards |
UL 248-14 |
Breaking Capacity |
50A@300VAC 50A@250VAC 200A@125VAC |
Characteristic |
Time-lag |
Max. Voltage |
250VAC |
Rated Voltage |
500mA~5A |
Size |
10.25x3.2mm |
Operating Characteristics of Slow Blow Surface Mounted Fuse 30A 250V
% of Ampere Rating(In) |
Blowing Time |
100% * In |
4 hours Min |
200% * In |
120 sec Max |
Our inspection devices list of Slow Blow Surface Mounted Fuse 30A 250V
Circuit-breaker test Salt spray test Digital microscope test Breaking capacity test Isolation test Tensile test Vibration test Thermal shock Soldering heat resistance test Thermal raising test Environmental test Plated-thickness major material analysis
How to Calculate Fuse Size the 1032 Slow Blow Surface Mount Fuse
A fuse is an electrical safety device that works by protecting a circuit against over-current. It contains a metal wire or strip that begins to melt when too much current passes through. Fuses have been used to protect components from damage and electrical fire. Now, there is an array of electronic products that use proper fuse selection to ensure maximum reliability.
Fuse Rating Terms and CharacteristicsThe current need to blow a fuse is also referred to as fuse rating. When a circuit is blown, current ceases to flow and the circuit is rendered safe again. Fuses are classified by the AC or DC circuit voltage they correspond to. In DC circuits, the current flows in a single direction and the voltage doesn't reach zero potential. AC circuit voltage goes past zero potential at 50 or 60 cycles per second. There are two main types of fuse ratings: The continuous rating and the blow rating. In the first case, the continuous current doesn't usually exceed 75 percent of the fuse's rated value, whereas the blow rating fuses are marked with the current rating at which the fuse will blow. They are usually marked at twice the value of the continuous rating.
Calculating Fuse SizeThere are several things you need to take into account when calculating fuse size. This process is essential to all electrical and electronic system designs. As the majority of DC-DC converters use circuit-sensing current limits or thermal overload circuits to protect against short-circuits, a fuse size calculator will need to take into account the right selection of an input fuse. This includes the voltage rating, current rating, interrupting rating, maximum circuit fault current and other mechanical considerations.
Fuse Class for Circuit ProtectionFuses can be selected by characteristics, construction and classes. There are certain standards that manufacturers use to create a fuse, and these refer to the fuse classes in which every product must fit in. Class CC fuses, for example, represent the non-renewable devices used for the protection of short-time overload components and non-inductive loads, as well as motor circuits. They're provided with rejection tips at the bottom and have a voltage rating of 600 VAC. While class G fuses are used for lighting and distribution boards, a class H fuse will be required to protect a branch circuit or even an electric oven from damage.