RLD30P090UFF

Resistance - Initial (Ri) (Min):	70 mOhms
Approvals:	cURus, TUV
Lead Spacing:	0.201" (5.10mm)
Thickness (Max):	--
Height - Seated (Max):	0.480" (12.20mm)
Size / Dimension:	0.291" L x 0.118" W (7.40mm x 3.00mm)
Package / Case:	Radial, Disc
Mounting Type:	Through Hole
Ratings:	--
Operating Temperature:	-40°C ~ 85°C
Resistance - Post Trip (R1) (Max):	220 mOhms
Series:	POLY-FUSE®, RLD30
Time to Trip:	5.9s
Current - Trip (It):	1.8A
Current - Hold (Ih) (Max):	900mA
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Part Status:	Obsolete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 FusesPTC (positive temperature coefficient) resettable fuses are current-responsive, over-current protection devices that can be used in a number of applications. They are designed to protect against both short-term over-currents, as well as long-term over-currents that could potentially damage sensitive components or assemblies. A particularly well-known example of a PTC resettable fuse is the RLD30P090UFF.The RLD30P090UFF is a fast-acting, resettable over-current protection device. It is suitable for use in a number of applications, including industrial and commercial products, electronic equipments, telecommunications and electric equipment. The device is rated for 30 amps continuous current with a 9VAC Voltage Drop. It’s UL approved, and features a wide operating temperature range. The RLD30P090UFF is a current-sensing device, meaning it can sense when the current is above its rating and will then activate to cut off the circuit. Its working principle is based on the PTC thermistor. The thermistor is a temperature-sensitive resistor whose electrical resistance changes with temperature. When the current flows through the thermistor, its resistance increases significantly, resulting in a voltage drop across the thermistor and thus triggering the device to switch off.The RLD30P090UFF features a wide range of characteristics, which makes it particularly suitable for applications that require high current protection. Its high-speed response time ensures protection against both short term and long term over-currents, while its low insertion loss reduces power losses. It also features surge protection capabilities up to 130V, ensuring optimal protection against electrical surges. The device is designed to be used in either over-current or short circuits applications.In order to use the RLD30P090UFF, the device must be connected in series in the protection circuit. The fuse should always be connected from the load to the power supply so that it is sensing when the current goes above its rating. The device has an activation threshold of 0.75xVnom or 0.90xVmin, meaning it will activate when the voltage falls below that point.Once the current reaches the threshold, the device will then switch off the circuit, protecting the circuit from any further damage. To reset the device, all you need to do is to simply disconnect and then reconnect the power supply. The device will then be reset and ready to be used again.The RLD30P090UFF is an excellent choice for those looking for an efficient, reliable and cost-effective over-current protection device. Its fast response, wide operating temperature range, along with its user-friendly installation and reset process make it a great choice for any application requiring over-current protection.

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