MF-R400-AP-99

Resistance - Initial (Ri) (Min):	10 mOhms
Approvals:	cURus, TUV
Lead Spacing:	0.201" (5.10mm)
Thickness (Max):	--
Height - Seated (Max):	0.976" (24.80mm)
Size / Dimension:	0.567" L x 0.118" W (14.40mm x 3.00mm)
Package / Case:	Radial, Disc
Mounting Type:	Through Hole
Ratings:	--
Operating Temperature:	-40°C ~ 85°C
Resistance - Post Trip (R1) (Max):	50 mOhms
Series:	Multifuse®, MF-R
Time to Trip:	12.7s
Current - Trip (It):	8A
Current - Hold (Ih) (Max):	4A
Current - Max:	40A
Voltage - Max:	30V
Type:	Polymeric
Moisture Sensitivity Level (MSL):	--
Part Status:	Not For New Designs
Lead Free Status / RoHS Status:	--
Packaging:	Tape & Box (TB)

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Introduction of PTC Resettable Fuses

PTC Resettable Fuses are solid state devices widely used in industrial applications. They are typically used to protect equipment against power loss, over current and overload. PTC resettable fuses commonly have adjustable or pre-set holding current levels and thermal sensitive polymers which provide reliable over temperature protection. They provide over temperature triggering due to the changes in the polymer\'s properties.

Overview of MF-R400-AP-99

The MF-R400-AP-99 is a PTC resettable fuse which is designed to provide a high holding current, adjustable reset current, and fast current response. The device has an adjustable range of 1A to 10A, and a high holding current of 10A. It is able to protect a wide range of electronic devices, such as personal computers, LED lighting, consumer electronics, electric heating elements, and medical equipment.

Working Principle of MF-R400-AP-99

The MF-R400-AP-99 works on the principle of resistance temperature coefficient. When the current flowing through it exceeds the preset level, the polymer housed within starts to increase in temperature. This increase in temperature produces a change in the resistance of the polymer, creating a sudden increase in current draw. This high current draw generates heat, melting the fuse element and creating a short circuit, thus breaking the circuit and protecting the device from overload. Once the current is no longer present, the fuse will return to its normal state and the device can be reset without replacing the fuse.

Application Fields of MF-R400-AP-99

The MF-R400-AP-99 is ideal for use in a wide variety of industrial applications such as -

• Personal computers and home electronics.
• Consumer electronics.
• Medical equipment.
• LED lighting.
• Electric heating elements.
• Charging circuit protection.
• Industrial equipment and automation.

The MF-R400-AP-99 PTC resettable fuse is lightweight, easy to install, and provides reliable protection against current overload and over temperature triggering. It is widely used in a variety of applications and is available from a number of suppliers.

Conclusion

The MF-R400-AP-99 is a versatile PTC resettable fuse designed to provide reliable current overload protection. It has a broad range of adjustable reset currents, and a high holding current. It is lightweight and can be used in a wide variety of applications, such as personal computers, consumer electronics, LED lighting, and medical equipment. Its easy to install design makes it ideal for use in any industrial setting.

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