MF-USMD050-2 Circuit Protection |
|
| Allicdata Part #: | MF-USMD050TR-ND |
| Manufacturer Part#: |
MF-USMD050-2 |
| Price: | $ 0.00 |
| Product Category: | Circuit Protection |
| Manufacturer: | Bourns Inc. |
| Short Description: | PTC RESET FUSE 13.2V 500MA 1210 |
| More Detail: | Polymeric PTC Resettable Fuse 13.2V 500mA Ih Surfa... |
| DataSheet: |  MF-USMD050-2 Datasheet/PDF |
| Quantity: | 1000 |
| Moisture Sensitivity Level (MSL): | 1 (Unlimited) |
| Lead Free Status / RoHS Status: | Contains lead / RoHS non-compliant |
| 1 +: | 0.00000 |
Specifications
| Resistance - Initial (Ri) (Min): | 180 mOhms |
| Approvals: | CSA, TUV, UR |
| Lead Spacing: | -- |
| Thickness (Max): | 0.024" (0.62mm) |
| Height - Seated (Max): | -- |
| Size / Dimension: | 0.127" L x 0.102" W (3.22mm x 2.58mm) |
| Package / Case: | 1210 (3225 Metric) |
| Mounting Type: | Surface Mount |
| Ratings: | -- |
| Operating Temperature: | -40°C ~ 85°C |
| Resistance - Post Trip (R1) (Max): | 900 mOhms |
| Series: | Multifuse®, MF-USMD |
| Time to Trip: | 100ms |
| Current - Trip (It): | 1A |
| Current - Hold (Ih) (Max): | 500mA |
| Current - Max: | 40A |
| Voltage - Max: | 13.2V |
| Type: | Polymeric |
| Moisture Sensitivity Level (MSL): | -- |
| Part Status: | Obsolete |
| Lead Free Status / RoHS Status: | -- |
| Packaging: | Tape & Reel (TR) |
Description
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PTC Resettable Fuses are a class of fuses that protect against the damaging and dangerous effects of over-current in electrical circuits. They are commonly referred to as “polyfuses” or “polymeric fuses” because of their polymeric material construction. The most common application for these resettable fuses is consumer electronic, but they can also be used in industrial and medical applications. The MF-USMD050-2 Resettable Fuses are classified as PTC fuses, as they contain positive temperature coefficient (PTC) material, which is an element that has current-limiting characteristics. This type of fuse is suitable for a wide range of electrical systems, particularly those with high voltages and high energy levels.
The working principle of the MF-USMD050-2 Resettable Fuse follows the same principle as conventional fuses. When an over-current flows in the circuit, the fuse will heat and melt the polymeric material, thus tripping the current and opening the circuit. The purpose of this type of fuse is to limit the current while protecting the system components and circuitry from any potential damage. The fuse can then be manually reset, allowing the circuit to continue functioning normally.
The melting point of the MF-USMD050-2 Resettable Fuse is relatively high, ranging from 140°C to 150°C. This makes these fuses ideal for applications where there is a risk of high-power surges, such as power supplies or heavy-duty machinery. The fuse is also able to withstand temperatures of up to 150°C, allowing it to be used in harsh environmental conditions.
The MF-USMD050-2 Resettable Fuse is composed of three primary components: the PTC element, the lead wires, and the casing. The PTC element consists of ceramic that is filled with a blend of polymeric materials, such as polyethylene. This material will heat up and expand when it reaches its melting point, thereby tripping the current. The lead wires connect the fuse to the system, while the casing creates an environmental safe zone for the PTC element.
In order for the MF-USMD050-2 Resettable Fuse to reset correctly, the current must drop below the trip threshold. Once the current is below the threshold, the PTC element will begin to cool and return to its original size and shape, thus allowing the current to flow again. The performance and lifespan of the fuse will depend on many factors, such as the frequency and severity of surges, as well as the temperature of the environment in which it is used.
The advantages of using the MF-USMD050-2 Resettable Fuse are numerous. The main benefit is that it can be used in various electrical applications without the need for replacing the fuse after each over-current. This eliminates the need for additional maintenance time and cost, as the fuse can simply be reset when needed. The high melting point of the fuse also allows it to be used in more demanding electrical applications, making it an ideal choice for many configurations. The downside to this type of fuse is that the cost may be slightly higher when compared to conventional fuses.
The MF-USMD050-2 Resettable Fuse is a reliable and efficient method of protecting electrical components and systems against the damaging effects of over-current. This type of fuse offers advantages over conventional fuses, such as improved performance and increased lifespan, as well as it being able to be reset instead of needing to be replaced after each over-current. The cost of the fuse may be slightly higher than some alternatives, however the overall advantages of using the MF-USMD050-2 Resettable Fuse make it an excellent choice for protecting a wide range of electrical systems.
The specific data is subject to PDF, and the above content is for reference
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