Resettable Fuses - PPTC

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LR4 15/20V PolySwitch Battery Strap PPTCs

Littelfuse LR4 15/20V PolySwitch Battery Strap Polymeric Positive Temperature Coefficient Resettable Fuses (PPTCs) serve changing battery technology and help protect battery applications. Littelfuse LR4 offers a 3.8A to 13A hold current and 100A maximum current along with 15 or 20V maximum voltage. These Polyswitch devices provide fast time-to-trip and serve a variety of devices, including smartphones, tablet PCs, mobile radios, digital cameras, and power tool charge lines.

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Image	Part #	Mfr.	Description	Datasheet	Availability	Pricing (PEN) Filter the results in the table by unit price based on your quantity.	Qty.	Series	Mounting Style	Termination Style	Hold Current	Maximum Voltage	Trip Current	Current Rating - Max	Resistance	Minimum Operating Temperature	Maximum Operating Temperature	Packaging
Resettable Fuses - PPTC 2.6A 15V 100A Imax LR4-260F Littelfuse 1: S/ 3.23 46,072In Stock 20,000Expected 12/2/2026	Mfr. Part # LR4-260F Mouser Part # 650-LR4-260F	Littelfuse	Resettable Fuses - PPTC 2.6A 15V 100A Imax Learn More about Littelfuse lr4 pptcs	Datasheet	46,072In Stock 20,000Expected 12/2/2026	S/ 3.23 S/ 2.97 S/ 2.46 S/ 2.27 View S/ 2.04 S/ 1.88 S/ 1.85	Min.: 1 Mult.: 1	LR4	Strap Mount	SMD/SMT	2.6 A	15 VDC	5.8 A	100 A	42 mOhms	- 40 C	+ 85 C	Bulk
Resettable Fuses - PPTC LR4-1300SSF LR4-1300SSF Littelfuse 1: S/ 8.17 3,917In Stock	Mfr. Part # LR4-1300SSF Mouser Part # 650-LR4-1300SSF	Littelfuse	Resettable Fuses - PPTC LR4-1300SSF Learn More about Littelfuse lr4 pptcs	Datasheet	3,917In Stock	S/ 8.17 S/ 6.93 S/ 6.03 S/ 5.61 View S/ 5.18 S/ 4.79 S/ 4.48	Min.: 1 Mult.: 1	LR4	Strap Mount	SMD/SMT	13 A	20 VDC	21.2 A	100 A	6.5 mOhms	- 40 C	+ 85 C	Bulk
Resettable Fuses - PPTC LR4-380F LR4-380F Littelfuse 1: S/ 3.70 5,046In Stock	Mfr. Part # LR4-380F Mouser Part # 650-LR4-380F	Littelfuse	Resettable Fuses - PPTC LR4-380F Learn More about Littelfuse lr4 pptcs	Datasheet	5,046In Stock	S/ 3.70 S/ 3.39 S/ 2.98 S/ 2.26 View S/ 2.16 S/ 2.02 S/ 1.99	Min.: 1 Mult.: 1	LR4	Strap Mount	SMD/SMT	3.8 A	15 VDC	8.3 A	100 A	26 mOhms	- 40 C	+ 85 C	Bulk
Resettable Fuses - PPTC 4.5A 20V 100A Imax LR4-450F Littelfuse 1: S/ 4.16 7,848In Stock 3,000Expected 2/8/2027	Mfr. Part # LR4-450F Mouser Part # 650-LR4-450F	Littelfuse	Resettable Fuses - PPTC 4.5A 20V 100A Imax Learn More about Littelfuse lr4 pptcs	Datasheet	7,848In Stock 3,000Expected 2/8/2027	S/ 4.16 S/ 3.82 S/ 3.16 S/ 2.93 View S/ 2.63 S/ 2.43 S/ 2.23 S/ 2.13	Min.: 1 Mult.: 1	LR4	Strap Mount	SMD/SMT	4.5 A	20 VDC	8.9 A	100 A	20 mOhms	- 40 C	+ 85 C	Bulk
Resettable Fuses - PPTC 5.5A 20V 100A Imax LR4-550F Littelfuse 1: S/ 4.28 8,023In Stock 5,000Expected 12/31/2026	Mfr. Part # LR4-550F Mouser Part # 650-LR4-550F	Littelfuse	Resettable Fuses - PPTC 5.5A 20V 100A Imax Learn More about Littelfuse lr4 pptcs	Datasheet	8,023In Stock 5,000Expected 12/31/2026	S/ 4.28 S/ 3.93 S/ 3.26 S/ 3.01 View S/ 2.70 S/ 2.52 S/ 2.50	Min.: 1 Mult.: 1	LR4	Strap Mount	SMD/SMT	5.5 A	20 VDC	10.5 A	100 A	16 mOhms	- 40 C	+ 85 C	Bulk
Resettable Fuses - PPTC 6A 20V 100A Imax LR4-600F Littelfuse 1: S/ 4.71 4,120In Stock	Mfr. Part # LR4-600F Mouser Part # 650-LR4-600F	Littelfuse	Resettable Fuses - PPTC 6A 20V 100A Imax Learn More about Littelfuse lr4 pptcs	Datasheet	4,120In Stock	S/ 4.71 S/ 4.36 S/ 3.43 S/ 3.32 View S/ 2.99 S/ 2.76 S/ 2.61	Min.: 1 Mult.: 1	LR4	Strap Mount	SMD/SMT	6 A	20 VDC	11.7 A	100 A	14 mOhms	- 40 C	+ 85 C	Bulk
Resettable Fuses - PPTC 7.3A 20V 100A Imax LR4-730F Littelfuse 1: S/ 5.49 13,598In Stock	Mfr. Part # LR4-730F Mouser Part # 650-LR4-730F	Littelfuse	Resettable Fuses - PPTC 7.3A 20V 100A Imax Learn More about Littelfuse lr4 pptcs	Datasheet	13,598In Stock	S/ 5.49 S/ 5.02 S/ 4.20 S/ 3.86 View S/ 3.47 S/ 3.20 S/ 2.95 S/ 2.89	Min.: 1 Mult.: 1	LR4	Strap Mount	SMD/SMT	7.3 A	20 VDC	14.1 A	100 A	12 mOhms	- 40 C	+ 85 C	Bulk
Resettable Fuses - PPTC 9A 20V 100A Imax LR4-900F Littelfuse 1: S/ 6.07 4,213In Stock	Mfr. Part # LR4-900F Mouser Part # 650-LR4-900F	Littelfuse	Resettable Fuses - PPTC 9A 20V 100A Imax Learn More about Littelfuse lr4 pptcs	Datasheet	4,213In Stock	S/ 6.07 S/ 5.61 S/ 4.63 S/ 4.28 View S/ 3.83 S/ 3.70 S/ 3.55 S/ 3.44	Min.: 1 Mult.: 1	LR4	Strap Mount	SMD/SMT	9 A	20 VDC	16.7 A	100 A	10 mOhms	- 40 C	+ 85 C	Bulk
Resettable Fuses - PPTC LR4-190F LR4-190F Littelfuse 1: S/ 2.65 2,830In Stock	Mfr. Part # LR4-190F Mouser Part # 650-LR4-190F	Littelfuse	Resettable Fuses - PPTC LR4-190F Learn More about Littelfuse lr4 pptcs	Datasheet	2,830In Stock	S/ 2.65 S/ 2.42 S/ 2.01 S/ 1.86 View S/ 1.67 S/ 1.54 S/ 1.38	Min.: 1 Mult.: 1	LR4	Strap Mount	SMD/SMT	1.9 A	15 VDC	3.9 A	100 A	72 mOhms	- 40 C	+ 85 C	Bulk
Resettable Fuses - PPTC 2.6A 15V 100A Imax LR4-260SF Littelfuse 1: S/ 3.43 1,440In Stock	Mfr. Part # LR4-260SF Mouser Part # 650-LR4-260SF	Littelfuse	Resettable Fuses - PPTC 2.6A 15V 100A Imax Learn More about Littelfuse lr4 pptcs	Datasheet	1,440In Stock	S/ 3.43 S/ 3.15 S/ 2.61 S/ 2.41 View S/ 2.16 S/ 2.00 S/ 1.84 S/ 1.72	Min.: 1 Mult.: 1	LR4	Strap Mount	SMD/SMT	2.6 A	15 VDC	5.8 A	100 A	42 mOhms	- 40 C	+ 85 C	Bulk
Resettable Fuses - PPTC LR4-380XF LR4-380XF Littelfuse 1: S/ 3.93 Non-Stocked Lead-Time 17 Weeks	Mfr. Part # LR4-380XF Mouser Part # 650-LR4-380XF	Littelfuse	Resettable Fuses - PPTC LR4-380XF Learn More about Littelfuse lr4 pptcs	Datasheet	Non-Stocked Lead-Time 17 Weeks	S/ 3.93 S/ 3.60 S/ 2.99 S/ 2.76 View S/ 2.48 S/ 2.28 S/ 2.10 S/ 1.99	Min.: 1 Mult.: 1	LR4	Strap Mount	SMD/SMT	3.8 A	15 VDC	8.3 A	100 A	26 mOhms	- 40 C	+ 85 C	Bulk
Resettable Fuses - PPTC LR4-600XF LR4-600XF Littelfuse 10,000: S/ 2.81 Non-Stocked Lead-Time 17 Weeks	Mfr. Part # LR4-600XF Mouser Part # 650-LR4-600XF	Littelfuse	Resettable Fuses - PPTC LR4-600XF Learn More about Littelfuse lr4 pptcs	Datasheet	Non-Stocked Lead-Time 17 Weeks	S/ 2.81	Min.: 10,000 Mult.: 1,000	LR4	Strap Mount	SMD/SMT	6 A	20 VDC	11.7 A	100 A	14 mOhms	- 40 C	+ 85 C	Bulk
Resettable Fuses - PPTC 20V 5.5A Ih 0.016ohm LR4-550RF Littelfuse Non-Stocked	Mfr. Part # LR4-550RF Mouser Part # 650-LR4-550RF	Littelfuse	Resettable Fuses - PPTC 20V 5.5A Ih 0.016ohm Learn More about Littelfuse lr4 pptcs	Datasheet	Non-Stocked		Request a Quote	LR4	Strap Mount	Axial	5.5 A	20 V	10.5 A	100 A	16 mOhms	- 40 C	+ 85 C	Bulk

LR4 15/20V PolySwitch Battery Strap PPTCs

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