RLD30P185UFF

Resistance - Initial (Ri) (Min):	30 mOhms
Approvals:	cURus, TUV
Lead Spacing:	0.201" (5.10mm)
Thickness (Max):	--
Height - Seated (Max):	0.618" (15.70mm)
Size / Dimension:	0.402" L x 0.118" W (10.20mm x 3.00mm)
Package / Case:	Radial, Disc
Mounting Type:	Through Hole
Ratings:	--
Operating Temperature:	-40°C ~ 85°C
Resistance - Post Trip (R1) (Max):	90 mOhms
Series:	POLY-FUSE®, RLD30
Time to Trip:	8.7s
Current - Trip (It):	3.7A
Current - Hold (Ih) (Max):	1.85A
Current - Max:	40A
Voltage - Max:	30V
Type:	Polymeric
Moisture Sensitivity Level (MSL):	--
Part Status:	Obsolete
Lead Free Status / RoHS Status:	--
Packaging:	Tape & Box (TB)

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PTC Resettable Fuses

PTC resettable fuses, also known as polymeric positive temperature coefficient, are one of the most common types of electronic circuit protection devices available. They provide overcurrent protection for automotive, consumer, industrial and telecommunication applications, among others. The RLD30P185UFF is a PTC resettable fuse that is widely used due to its low cost and fast response time.

Application Field

The RLD30P185UFF is mainly used to protect circuits from overcurrent damage by interrupting the circuit before it is damaged. It is suitable for a wide range of applications such as automotive, consumer electronics, computers, telecommunications, industrial automation, and medical products.In automobiles, it can be used to protect circuits against electric current overload. The fuse helps prevent voltage surges and can be placed anywhere in the circuit to protect other components. In consumer electronics, it can protect circuits against overcurrent and short circuits. In computers and telecommunications, it can protect circuits against overvoltage, overcurrent, short circuits, and false triggering. In industrial automation, it can protect circuits against overvoltage and overcurrent. And in medical products, it can protect circuits against potentially hazardous electrical currents.

Working Principle

The RLD30P185UFF is a solid-state overcurrent protection device, based on the PTC (Positive Temperature Coefficient) principle. A PTC resettable fuse is made of a conductive material with a high resistivity which, when current passes through it, increases its temperature. This temperature increase causes an increase in the resistance of the conductive material, which in turn causes a decrease in the current through it. When the temperature reaches a certain level, the PTC resettable fuse will trip and cut off the current flow.Once the overload is removed, the fuse cools and the resistance of the material reduces again. This causes the current to increase until the proper operating point is reached. The fuse can then be reset and will continue to protect the circuit against further overloads.The RLD30P185UFF is a very effective overcurrent protection device with a fast response time. It can be used in many different applications and is very cost effective.

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