Resistance - Initial (Ri) (Min):	40 mOhms
Approvals:	CSA, TUV, UL
Lead Spacing:	0.199" (5.05mm)
Thickness (Max):	--
Height - Seated (Max):	0.532" (13.50mm)
Size / Dimension:	0.350" L x 0.118" W (8.90mm x 3.00mm)
Package / Case:	Radial, Disc
Mounting Type:	Through Hole
Ratings:	--
Operating Temperature:	-40°C ~ 85°C
Resistance - Post Trip (R1) (Max):	112 mOhms
Series:	PolySwitch®, RUSBF
Time to Trip:	4.5s
Current - Trip (It):	2.7A
Current - Hold (Ih) (Max):	1.35A
Current - Max:	40A
Voltage - Max:	16V
Type:	Polymeric
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Bulk

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PTC Resettable Fuses

A PTC resettable fuse is an electrical protection device that has the capability to both limit the current going through it and reset itself after the current has been limited. One of these types of resettable fuses is the RUSBF135, which is designed to protect against overvoltage, thermal overload, and short circuit situations. It’s an extremely versatile and effective fuse for many applications.

Overview of RUSBF135

RUSBF135 is a polymeric positive temperature coefficient (PPTC) resettable fuse. It\'s a single circuit device with a rated voltage of 32 VDC, with a rated continuous current of 135mA and a rated power of 4.32W. It will trip at temperatures between 57-70 °C, and it\'ll reset automatically at temperatures between 50-60 °C. It can also withstand a maximum transient overvoltage of 6V for 1 second, making it perfect for protecting circuits against short-duration surges. It’s also RoHS compliant.

Applications of RUSBF135

Because of its various capabilities and safety features, the RUSBF135 can be used in a variety of applications. It’s very well suited for consumer electronics, since it can protect against overvoltage, thermal overload, and short circuit conditions. It’s also ideal for automotive, industrial, and telecommunication applications. For example, in automotive and industrial applications, RUSBF135 fuses can protect engines and sensitive electronic systems from electrical issues such as voltage spikes, current overloads, and short circuits. In telecommunication networks, RUSBF135 fuses can protect networks of servers against power surges, since it can reset itself after the current has been limited. It’s also well-suited for protecting network connections between the core network and remote sites.

Advantages of RUSBF135

Fuses such as the RUSBF135 are very reliable and cost-effective for many applications. One of its biggest advantages is that it can reset itself after trip, saving the user time and money as they don’t have to replace the fuse. It’s also very easy to install, since it doesn’t require any special tools to do so. Additionally, the RUSBF135 is highly durable, and won’t easily be damaged or worn out, even with multiple trips.

Working Principle of RUSBF135

The working principle behind the RUSBF135 is relatively simple. It uses a positive temperature coefficient (PTC) element that acts as a negative temperature coefficient (NTC) thermistor when the current is too high. When the current reaches or exceeds its rated limit, the temperature of the fuse will increase, causing the PTC element to become more resistive. This increase in resistance will limit the current and trip the fuse, thereby protecting the circuit from further damage. When the temperature decreases, the fuse will reset itself, allowing normal current flow.

Conclusion

The RUSBF135 is an extremely versatile and useful resettable fuse for many applications. It has the capability to limit current and reset itself, making it perfect for protecting circuits from overvoltage, thermal overload, and short circuit conditions. It’s ideal for consumer electronics, automotive, industrial, and telecommunication applications, since it’s easy to install, reliable, and cost-effective.

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