CMF-SDP50-2 Circuit Protection

Time to Trip:	130ms
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):	50 Ohms
Series:	CMF-SDP
Current - Trip (It):	190mA
Current - Hold (Ih) (Max):	90mA
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)

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CMF-SDP50-2 application field and working principle

PTC resettable fuses are electrical components that protect against excessive current. CMF-SPD50-2 is a type of PTC resettable fuse used in a variety of applications such as circuit protection, over-current protection, and over-voltage protection. Unlike other PTC resettable fuses, CMF-SDP50-2 has an advantage-no need of Replace. When there is an over-currents event, the PTC resettable fuse will change shape and become heat-resistant, stopping any further current from flowing through the circuit. When the over-current event has passed the PTC resettable circuit fuse can be reset back to its original shape to start working again. This makes the circuit breaker much more cost-efficient in the long-run as there is no need to replace it. This type of resettable fuse is mainly used in LED lighting systems, industrial automation, consumer electronics, HVAC, and test and measurement equipment. It provides an over-current protection of 50A with a wide operating temperature range of -40 to +85 degrees Celsius. The maximum hold rating of this fuse is 69A (at 20℃) and it has a current rating of 50A. This type of fuse is of a radial design with a high degree of vibration resistance. The contact resistance is very low, around 0.001 ohms, which makes it ideal for low-impedance circuits. This fuse is also UL approved and RoHS compliant.The working principle is simple: the fuse element itself contains a number of resistors connected in series which, when a current is applied, create a temperature rise. When the temperature rises above a certain level, these resistors will its shape and cease to resist current flowing through them. This stops further current from flowing and the PTC resettable fuse is reset.When the current is under the manufacturer’s specifications, the temperature of the fuse will remain low and the resistors will stay in their original shape and continue to absorb the current without any problems. In conclusion, CMF-SDP50-2PTC Resettable Fuses are a great way to ensure that over-currents are stopped before they cause damage to electronic devices. This type of resettable fuse is able to reset itself to its original shape once the over-current event has passed and the user does not need to replace it. This makes it great for use in applications such as LED lighting systems, industrial automation, consumer electronics, HVAC, and test and measurement equipment.

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