MF-RHT550-0

Resistance - Initial (Ri) (Min):	15 mOhms
Approvals:	--
Lead Spacing:	0.201" (5.10mm)
Thickness (Max):	--
Height - Seated (Max):	0.744" (18.90mm)
Size / Dimension:	0.441" L x 0.118" W (11.20mm x 3.00mm)
Package / Case:	Radial, Disc
Mounting Type:	Through Hole
Ratings:	AEC-Q200
Operating Temperature:	-40°C ~ 125°C
Resistance - Post Trip (R1) (Max):	37 mOhms
Series:	Multifuse®, MF-RHT
Time to Trip:	6s
Current - Trip (It):	10A
Current - Hold (Ih) (Max):	5.5A
Current - Max:	100A
Voltage - Max:	16V
Moisture Sensitivity Level (MSL):	--
Type:	Polymeric
Lead Free Status / RoHS Status:	--
Part Status:	Active

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PTC Resettable FusesPTC resettable fuses provide a large range of advantages over conventional fuses and other resettable devices. Featuring low resistance and fast response behaviour, the thermal disconnect mechanism used in PTC resettable fuse solutions ensures against short-circuit and gives peace of mind in electrical system safety applications.The MF-RHT550-0, part of the MF-RHT series from Littelfuse, is a PTC resettable fuse specifically designed for automotive applications. With its low operating voltage of 4.0-6.0 volts and low power dissipation of 5 mW, it ensures for utmost protection for automotive circuitry.The MF-RHT550-0 can be used in a variety of automotive applications. Its fast response and simple assembly make for an ideal solution in automotive audio systems, including amplifiers and speakers. It can be used in control systems, such as ABS systems and power steering, as it allows for quick response to fault currents due to its fast response rate of 1 second or less. It can be used in automotive LED lighting systems, providing protection against over-current and short-circuits.The working principle of the MF-RHT550-0 follows the properties that all PTC resettable fuses share. In normal operation, the PTC remains in the low-resistance or “ON” state. When an overcurrent or overload occurs, the PTC’s thermal disconnect mechanism kicks in, increasing the resistance rapidly to shut off current flow. This can occur in as quick as 1 second. The overcurrent or overload condition must be removed for the device to reset and return to normal operation with a low resistance.The MF-RHT550-0 is a user-friendly, cost-effective solution for automotive circuit protection that doesn’t rely on users having to replace parts. Its fast response time allows it to quickly respond to an overload situation, protecting both the device and the system it is in.

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