350V Time Delay Slow Blow Surface Mounted Fuse was designed for high voltage withstand application rated at 350V AC and 72V DC , it is compatible with AC application and DC application in different application.
Square End Block Cartridge Style 2-SMD 2410 Time Delay Surface Mount Fuse 1A 350V AC 72V DC
Description of 350V Time Delay Slow Blow Surface Mounted Fuse
The 2410 Time Delay Surface Mount Fuse is suitable for secondary-level overcurrent protection applications at voltages up to 250 VAC and 72 VDC.These lead-free surface-mount devices offer increased reliability and avoid the risk of end caps falling off. Their straight wire element in air performs consistent fusing and cutting characteristics.
Features of 350V Time Delay Slow Blow Surface Mounted Fuse
Wide current ratings
Wide operating temperature-55°C to 125°C
High voltage version – 350VAC 72VDC
Small size 6.1x2.5mm
Excellent inrush withstand ability
Excellent consistency
Automatic production method
Tape in reel and easy to be installed
Application of 350V Time Delay Slow Blow Surface Mounted Fuse
LED driver
Power Supplier
Residential Electric Water Heater
Medical devices
Industrial equipment
Office equipment
Telecom device
Electrical Characteristics of 350V Time Delay Slow Blow Surface Mounted Fuse
% of Ampere Rating(In) |
Blowing Time |
100% * In |
4 hours Min |
200% * In |
120 sec Max |
1000% * In |
10ms Min |
Dimensional Drawing and Material Details of 350V Time Delay Slow Blow Surface Mounted Fuse (Unit:mm)
NO. |
Part Name |
Material |
1 |
End caps |
Au or Ag Plated Brass Cap |
2 |
Body |
Non-Transparent Square Ceramic Tube |
3 |
Fuse element |
Cu-Ag Alloy wire |
Electrical Specifications of 350V Time Delay Slow Blow Surface Mounted Fuse
Breaking Capacity: 35A@350Vac 50A@300Vac, 50A@250Vac,200A@125Vac.
Catalog No. |
Ampere Rating |
Voltage Rating |
Breaking Capacity |
Nominal Cold Resistance (Ohms) |
I2TMelting Integral(A2.S) |
SRT0250 |
250mA |
350V |
35A@350VAC 50A@300VAC 50A@250VAC 200A@125VAC |
0.860 |
0.145 |
SRT0300 |
300mA |
350V |
0.620 |
0.162 |
|
SRT0315 |
315mA |
350V |
0.550 |
0.189 |
|
SRT0375 |
375mA |
350V |
0.470 |
0.200 |
|
SRT0400 |
400mA |
350V |
0.380 |
0.238 |
|
SRT0500 |
500mA |
350V |
0.320 |
0.275 |
|
SRT0600 |
600mA |
350V |
0.285 |
0.470 |
|
SRT0630 |
630mA |
350V |
0.256 |
0.566 |
|
SRT0700 |
700mA |
350V |
0.208 |
0.805 |
|
SRT0750 |
750mA |
350V |
0.175 |
1.240 |
|
SRT0800 |
800mA |
350V |
0.155 |
1.880 |
|
SRT1100 |
1A |
350V |
0.148 |
3.500 |
|
SRT1125 |
1.25A |
350V |
0.102 |
4.760 |
|
SRT1150 |
1.5A |
350V |
0.085 |
6.305 |
|
SRT1160 |
1.6A |
350V |
0.075 |
6.505 |
|
SRT1200 |
2A |
350V |
0.044 |
8.950 |
|
SRT1250 |
2.5A |
350V |
0.043 |
16.025 |
|
SRT1300 |
3A |
350V |
0.033 |
21.560 |
|
SRT1315 |
3.15A |
350V |
0.029 |
22.750 |
|
SRT1350 |
3.5A |
350V |
0.027 |
27.050 |
|
SRT1400 |
4A |
350V |
0.025 |
31.808 |
|
SRT1500 |
5A |
350V |
0.019 |
40.250 |
|
SRT1600 |
6A |
350V |
0.018 |
67.245 |
|
SRT1630 |
6.3A |
350V |
0.017 |
73.550 |
|
SRT1700 |
7A |
350V |
0.015 |
76.280 |
Ø *:These catalog no. cold resistance and I2t value are pending due to fuse elements shall be customized;
Ø DC Cold Resistance are measured at <10% of rated current in ambient temperature of 25℃;
Ø Typical Pre-arching I2t arecalculated at 10*In Current or 8ms;
Ø Min Interrupting Rating: 1.35*In.
Package method of 350V Time Delay Slow Blow Surface Mounted Fuse
Tape in reel, 1,000 pcsin 7 inches dia. reel, 12mm wide tape, EIA Standard 481
Average Time Current Curves of 350V Time Delay Slow Blow Surface Mounted Fuse
Does a fuse resistor work the same as a fuse?
A resistor is available for a certain load. If the current flowing through the resistor goes beyond the limit, it will be burned and the circuit will be open. At this point, a resistor is similar to a fuse, i.e., the current can be interrupted upon overcurrent. This seems like a fuse function. In this way, some manufacturers change the fuse in its original design to cheap fuse resistors to keep cost down, presenting customers with superficial security.
However, is a fuse resistor able to substitute a fuse to have the same function? The answer is obviously no.
As we know, a good fuse must possess three essential functions: protection, load bearing and safety, while a fuse resistor may not be able to work well in all three aspects.
The protection function covers overload protection and short circuit protection. Specifically, a fuse must operate within the specified time when an unexpected overcurrent, even an extremely short overcurrent, occurs in the circuit, so as to protect the circuit and parts. A fuse resistor may not be as accurate as the fuse in terms of technical parameters like starting time and operation duration, and thus cannot ensure overcurrent protection. It only works to some extent for short current.
The load bearing function of a fuse is ensured by the I2t value, which enables a fuse to withstand pulse shocks of a certain energy from switching operations. We should calculate and evaluate this value before fuse selection. Nevertheless, a fuse resistor has no similar technical indexes, so it may be blown by a pulse if the value is small or fail to protect the circuit if it is large.
As for safety, a fuse can be assured through rated voltage, interrupting capacity and other indexes, especially safety compliance certification by an authorized third party. A fuse resistor is not a safety component, so it does not need certification. Its safety is therefore questionable. Furthermore, it has insufficient protection, and its hard to ensure no hazards occur during the breaking process.
In conclusion, a fuse resistor may blow upon overcurrent, but it cannot work the same as a fuse. In most applications, it will not be appropriate to replace a fuse with a fuse resistor to cut cost.