CMF-SDP75-2 Allicdata Electronics
Allicdata Part #:

CMF-SDP75-2-ND

Manufacturer Part#:

CMF-SDP75-2

Price: $ 0.44
Product Category:

Circuit Protection

Manufacturer: Bourns Inc.
Short Description: PTC RESET FUSE 230V 70MA 4SMD
More Detail: Ceramic PTC Resettable Fuse 230V (600V Int) 70mA I...
DataSheet: CMF-SDP75-2 datasheetCMF-SDP75-2 Datasheet/PDF
Quantity: 1000
Moisture Sensitivity Level (MSL): 1 (Unlimited)
Lead Free Status / RoHS Status: Lead free / RoHS Compliant
1400 +: $ 0.40194
Stock 1000Can Ship Immediately
$ 0.44
Specifications
Time to Trip: 120ms
Approvals: --
Lead Spacing: --
Thickness (Max): 0.453" (11.50mm)
Height - Seated (Max): --
Size / Dimension: 0.433" L x 0.354" W (11.00mm x 9.00mm)
Package / Case: 4-SMD Cube
Mounting Type: Surface Mount
Ratings: --
Operating Temperature: -40°C ~ 125°C
Resistance - 25°C (Typ): 75 Ohms
Series: CMF-SDP
Current - Trip (It): 150mA
Current - Hold (Ih) (Max): 70mA
Current - Max: 2.5A
Voltage - Max: 230V (600V Int)
Type: Ceramic
Moisture Sensitivity Level (MSL): --
Part Status: Active
Lead Free Status / RoHS Status: --
Packaging: Tape & Reel (TR) 
Description

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PTC resettable fuses, also known as polyfuse, are overcurrent and overvoltage protective electrical devices. They are used to protect sensitive components from thermal and electrical failure due to excessive current. While most fuses are single-use, PTC resettable fuses can commonly be reset by cooling the fuse back down to ambient temperature and applied current.

CMF-SDP75-2 is one type of PTC resettable fuse. It is typically used as overcurrent protection in precision medical, automotive and machinery equipment, audio and power supplies, instrumentation, telecommunications, digital consumer products and industrial control systems. It has a nominal voltage rating of 75V and a current rating of 2A.

The working principle of the CMF-SDP75-2 can be understood with the help of a resistor-diode combination. The resistor allows current to flow unrestricted into the diode, and is usually designed to heat up to an operating temperature defined by the manufacturer. As the temperature is increased, the resistor becomes more resistive, reducing the current. The diode then begins to conduct, allowing the current to be diverted back into the circuitry. This creates an overcurrent situation, which can then be reset by cooling the resistor back down to normal operating temperatures, and then re-applying current.

In addition to its overcurrent protection capabilities, the CMF-SDP75-2 also offers overvoltage protection. The resistors are rated to withstand voltages beyond their rating, giving them increased endurance against overvoltage spikes. If the device is overloaded and reaches the overvoltage threshold, the diode conducts until it is cooled and reset, diverting the overvoltage current back into the circuitry and preventing any further damage.

The main advantages of the CMF-SDP75-2 over other PTC resettable fuses are its high current handling capability, small form factor, and its ability to reset itself after prolonged overcurrent or overvoltage. Being a non-dissipative device, the CMF-SDP75-2 offers improved energy efficiency and less thermal dissipation than other fuses, while also protecting sensitive components from overcurrent and overvoltage damage.

In conclusion, CMF-SDP75-2 is a type of PTC resettable fuse which is used in precision medical, automotive, and machinery equipment. It can be used to protect sensitive components from thermal and electrical failure due to excessive current, overvoltage, or prolonged overcurrent or overvoltage. It offers advantages such as high current handling capability, small form factor, and the ability to reset itself, making it a great choice for high-end applications.

The specific data is subject to PDF, and the above content is for reference

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