15LT070SU

Resistance - Initial (Ri) (Min):	100 mOhms
Approvals:	cURus, TUV
Lead Spacing:	--
Thickness (Max):	0.047" (1.20mm)
Height - Seated (Max):	--
Size / Dimension:	0.827" L x 0.199" W (21.00mm x 5.05mm)
Package / Case:	Strap
Mounting Type:	User Defined
Ratings:	--
Operating Temperature:	-40°C ~ 85°C
Resistance - Post Trip (R1) (Max):	340 mOhms
Series:	POLY-FUSE®, LT
Time to Trip:	5s
Current - Trip (It):	1.5A
Current - Hold (Ih) (Max):	700mA
Current - Max:	100A
Voltage - Max:	15V
Type:	Polymeric
Moisture Sensitivity Level (MSL):	--
Part Status:	Obsolete
Lead Free Status / RoHS Status:	--
Packaging:	Bulk

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Introduction:

PTC (positive temperature coefficient) resettable fuses, also known as polyfuses, are devices that protect against over-current and over-temperature conditions. A PTC fuse is composed of two main components: a polymer and a metallic plate. The 15LT070SU is a type of PTC resettable fuse made by General Electric (GE). This article will discuss the application field and working principle of the 15LT070SU.

Application Field:

The 15LT070SU is commonly used in the automotive, electronics, and consumer industries. In the automotive industry, the 15LT070SUs are mainly used in automotive lighting systems. The 15LT070SUs are used to protect LED light sources from over-current and over-temperature conditions, ensuring the LED light source is operating safely. The 15LT070SUs are also used in consumer electronics items such as cameras, cell phones, and other personal electronic devices. They are used to protect against over-current and over-temperature conditions, which can lead to damage or even fire when left unchecked.

Working Principle:

The 15LT070SU consists of two main components: a polymer and a metallised plate. The polymer in the device acts as a thermal resistor. When the current flowing through the 15LT070SU exceeds the rated current, the temperature of the polymer increases. This causes the polymer to expand and push against the metallised plate. This then causes a physical break in the circuit, thereby stopping the flow of current. When the temperature of the device drops back to the normal operating temperature, the polymer returns to its original state and the circuit is restored. This type of resetting helps protect against over-current and over-temperature conditions.

Conclusion:

The 15LT070SU is an example of a PTC resettable fuse. It is used in a variety of industries, mainly in the automotive and consumer electronics industries. The 15LT070SU works by using a polymer to detect over-current and over-temperature conditions. When detected, the polymer expands and causes a physical break in the circuit, thereby stopping the flow of current. When the temperature of the device drops back to the normal operating temperature, the circuit is restored. This type of resetting helps protect against over-current and over-temperature conditions.

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