PTC Resettable Fuses

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Mfr Part #	Quantity Available	Price	Series	Package	Product Status	Type	Voltage - Max	Current - Hold (Ih) (Max)	Current - Trip (It)	Current - Max	Time to Trip	Resistance - Initial (Ri) (Min)	Resistance - Post Trip (R1) (Max)	Operating Temperature	Ratings	Mounting Type	Package / Case	Size / Dimension	Height - Seated (Max)	Thickness (Max)	Lead Spacing

MF-USML300/12-2 PTC RESET FUSE 12V 3A 1210 Bourns Inc.	11,413 In Stock	1 : ¥8.95000 Cut Tape (CT) 3,500 : ¥3.58210 Tape & Reel (TR)	Multifuse®, MF-USML/X	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	Active	Polymeric	12V	3 A	6 A	50 A	5 s	3 mOhms	24 mOhms	-40°C ~ 85°C	-	Surface Mount	1210 (3225 Metric), Concave	0.127" L x 0.101" W (3.22mm x 2.58mm)	-	0.047" (1.20mm)	-
MF-USML175/12-2 PTC RESET FUSE 12V 1.75A 1210 Bourns Inc.	9,268 In Stock	1 : ¥8.95000 Cut Tape (CT) 5,000 : ¥3.35822 Tape & Reel (TR)	Multifuse®, MF-USML/X	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	Active	Polymeric	12V	1.75 A	3.5 A	50 A	800 ms	6 mOhms	50 mOhms	-40°C ~ 85°C	-	Surface Mount	1210 (3225 Metric), Concave	0.127" L x 0.101" W (3.22mm x 2.58mm)	-	0.031" (0.80mm)	-
MF-USML500/12-2 PTC RESET FUSE 12V 5A 1210 Bourns Inc.	3,683 In Stock	1 : ¥8.95000 Cut Tape (CT) 3,500 : ¥3.58210 Tape & Reel (TR)	Multifuse®, MF-USML/X	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	Active	Polymeric	12V	5 A	10 A	50 A	2 s	1 mOhms	12 mOhms	-40°C ~ 85°C	-	Surface Mount	1210 (3225 Metric), Concave	0.127" L x 0.101" W (3.22mm x 2.58mm)	-	0.047" (1.20mm)	-
MF-USML700/6-2 PTC RESET FUSE 6V 7A 1210 Bourns Inc.	7,626 In Stock	1 : ¥6.65000 Cut Tape (CT) 3,500 : ¥2.79851 Tape & Reel (TR)	Multifuse®, MF-USML/X	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	Active	Polymeric	6V	7 A	14 A	50 A	2 s	1 mOhms	8 mOhms	-40°C ~ 85°C	-	Surface Mount	1210 (3225 Metric), Concave	0.127" L x 0.101" W (3.22mm x 2.58mm)	-	0.039" (1.00mm)	-
MF-USML300/6-2 PTC RESET FUSE 6V 3A 1210 Bourns Inc.	2,588 In Stock	1 : ¥6.65000 Cut Tape (CT) 3,500 : ¥2.56556 Tape & Reel (TR)	Multifuse®, MF-USML/X	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	Active	Polymeric	6V	3 A	6 A	50 A	5 s	3 mOhms	24 mOhms	-40°C ~ 85°C	-	Surface Mount	1210 (3225 Metric), Concave	0.127" L x 0.101" W (3.22mm x 2.58mm)	-	0.047" (1.20mm)	-
MF-USML260/12-2 PTC RESET FUSE 12V 2.6A 1210 Bourns Inc.	4,860 In Stock	1 : ¥8.95000 Cut Tape (CT) 5,000 : ¥2.77081 Tape & Reel (TR)	Multifuse®, MF-USML/X	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	Active	Polymeric	12V	2.6 A	5.2 A	50 A	5 s	4 mOhms	30 mOhms	-40°C ~ 85°C	-	Surface Mount	1210 (3225 Metric), Concave	0.127" L x 0.101" W (3.22mm x 2.58mm)	-	0.031" (0.80mm)	-
MF-USML450/12-2 PTC RESET FUSE 12V 4.5A 1210 Bourns Inc.	3,632 In Stock	1 : ¥8.95000 Cut Tape (CT) 3,500 : ¥2.77081 Tape & Reel (TR)	Multifuse®, MF-USML/X	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	Active	Polymeric	12V	4.5 A	9 A	50 A	2 s	2 mOhms	14 mOhms	-40°C ~ 85°C	-	Surface Mount	1210 (3225 Metric), Concave	0.127" L x 0.101" W (3.22mm x 2.58mm)	-	0.047" (1.20mm)	-
MF-USML400/12-2 PTC RESET FUSE 12V 4A 1210 Bourns Inc.	3,450 In Stock	1 : ¥8.95000 Cut Tape (CT) 3,500 : ¥3.58210 Tape & Reel (TR)	Multifuse®, MF-USML/X	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	Active	Polymeric	12V	4 A	8 A	50 A	5 s	2 mOhms	18 mOhms	-40°C ~ 85°C	-	Surface Mount	1210 (3225 Metric), Concave	0.127" L x 0.101" W (3.22mm x 2.58mm)	-	0.047" (1.20mm)	-
MF-USML380/12-2 PTC RESET FUSE 12V 3.8A 1210 Bourns Inc.	2,087 In Stock	1 : ¥8.95000 Cut Tape (CT) 3,500 : ¥2.77081 Tape & Reel (TR)	Multifuse®, MF-USML/X	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	Active	Polymeric	12V	3.8 A	7.6 A	50 A	5 s	2 mOhms	20 mOhms	-40°C ~ 85°C	-	Surface Mount	1210 (3225 Metric), Concave	0.127" L x 0.101" W (3.22mm x 2.58mm)	-	0.047" (1.20mm)	-
MF-USML200/12-2 PTC RESET FUSE 12V 2A 1210 Bourns Inc.	1,819 In Stock	1 : ¥8.95000 Cut Tape (CT) 5,000 : ¥3.35822 Tape & Reel (TR)	Multifuse®, MF-USML/X	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	Active	Polymeric	12V	2 A	4 A	50 A	5 s	5 mOhms	40 mOhms	-40°C ~ 85°C	-	Surface Mount	1210 (3225 Metric), Concave	0.127" L x 0.101" W (3.22mm x 2.58mm)	-	0.031" (0.80mm)	-
MF-USML400/6-2 PTC RESET FUSE 6V 4A 1210 Bourns Inc.	3,500 In Stock	1 : ¥6.65000 Cut Tape (CT) 3,500 : ¥2.79851 Tape & Reel (TR)	Multifuse®, MF-USML/X	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	Active	Polymeric	6V	4 A	8 A	50 A	5 s	2 mOhms	18 mOhms	-40°C ~ 85°C	-	Surface Mount	1210 (3225 Metric), Concave	0.127" L x 0.101" W (3.22mm x 2.58mm)	-	0.047" (1.20mm)	-
MF-USML600/6-2 PTC RESET FUSE 6V 6A 1210 Bourns Inc.	3,370 In Stock	1 : ¥6.65000 Cut Tape (CT) 3,500 : ¥2.79851 Tape & Reel (TR)	Multifuse®, MF-USML/X	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	Active	Polymeric	6V	6 A	12 A	50 A	2 s	1 mOhms	10 mOhms	-40°C ~ 85°C	-	Surface Mount	1210 (3225 Metric), Concave	0.127" L x 0.101" W (3.22mm x 2.58mm)	-	0.039" (1.00mm)	-
MF-USML350/6-2 PTC RESET FUSE 6V 3.5A 1210 Bourns Inc.	3,113 In Stock	1 : ¥6.65000 Cut Tape (CT) 3,500 : ¥2.79851 Tape & Reel (TR)	Multifuse®, MF-USML/X	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	Active	Polymeric	6V	3.5 A	7 A	50 A	5 s	2 mOhms	22 mOhms	-40°C ~ 85°C	-	Surface Mount	1210 (3225 Metric), Concave	0.127" L x 0.101" W (3.22mm x 2.58mm)	-	0.047" (1.20mm)	-
MF-USML350/12-2 PTC RESET FUSE 12V 3.5A 1210 Bourns Inc.	1,637 In Stock	1 : ¥8.95000 Cut Tape (CT) 3,500 : ¥3.58210 Tape & Reel (TR)	Multifuse®, MF-USML/X	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	Active	Polymeric	12V	3.5 A	7 A	50 A	5 s	2 mOhms	22 mOhms	-40°C ~ 85°C	-	Surface Mount	1210 (3225 Metric), Concave	0.127" L x 0.101" W (3.22mm x 2.58mm)	-	0.047" (1.20mm)	-
MF-USML550/12-2 PTC RESET FUSE 12V 5.5A 1210 Bourns Inc.	90 In Stock	1 : ¥8.95000 Cut Tape (CT) 3,500 : ¥3.58210 Tape & Reel (TR)	Multifuse®, MF-USML/X	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	Active	Polymeric	12V	5.5 A	11 A	50 A	2 s	1 mOhms	10 mOhms	-40°C ~ 85°C	-	Surface Mount	1210 (3225 Metric), Concave	0.127" L x 0.101" W (3.22mm x 2.58mm)	-	0.047" (1.20mm)	-
MF-USML650/6-2 PTC RESET FUSE 6V 6.5A 1210 Bourns Inc.	4 In Stock	1 : ¥6.65000 Cut Tape (CT) 3,500 : ¥2.79851 Tape & Reel (TR)	Multifuse®, MF-USML/X	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	Active	Polymeric	6V	6.5 A	13 A	50 A	2 s	1 mOhms	9 mOhms	-40°C ~ 85°C	-	Surface Mount	1210 (3225 Metric), Concave	0.127" L x 0.101" W (3.22mm x 2.58mm)	-	0.039" (1.00mm)	-
MF-USML550/6-2 PTC RESET FUSE 6V 5.5A 1210 Bourns Inc.	0 In Stock Check Lead Time	1 : ¥6.65000 Cut Tape (CT) 3,500 : ¥2.79851 Tape & Reel (TR)	Multifuse®, MF-USML/X	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	Active	Polymeric	6V	5.5 A	11 A	50 A	2 s	1 mOhms	10 mOhms	-40°C ~ 85°C	-	Surface Mount	1210 (3225 Metric), Concave	0.127" L x 0.101" W (3.22mm x 2.58mm)	-	0.047" (1.20mm)	-
MF-USML380/6-2 PTC RESET FUSE 6V 3.8A 1210 Bourns Inc.	0 In Stock Check Lead Time	1 : ¥6.65000 Cut Tape (CT) 3,500 : ¥2.79851 Tape & Reel (TR)	Multifuse®, MF-USML/X	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	Active	Polymeric	6V	3.8 A	7.6 A	50 A	5 s	2 mOhms	20 mOhms	-40°C ~ 85°C	-	Surface Mount	1210 (3225 Metric), Concave	0.127" L x 0.101" W (3.22mm x 2.58mm)	-	0.047" (1.20mm)	-
MF-USML175/6-2 PTC RESET FUSE 6V 1.75A 1210 Bourns Inc.	0 In Stock Check Lead Time	1 : ¥6.65000 Cut Tape (CT) 5,000 : ¥2.69487 Tape & Reel (TR)	Multifuse®, MF-USML/X	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	Active	Polymeric	6V	1.75 A	3.5 A	50 A	800 ms	6 mOhms	50 mOhms	-40°C ~ 85°C	-	Surface Mount	1210 (3225 Metric), Concave	0.127" L x 0.101" W (3.22mm x 2.58mm)	-	0.031" (0.80mm)	-
MF-USML500/6-2 PTC RESET FUSE 6V 5A 1210 Bourns Inc.	0 In Stock Check Lead Time	1 : ¥6.65000 Cut Tape (CT) 3,500 : ¥2.79851 Tape & Reel (TR)	Multifuse®, MF-USML/X	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	Active	Polymeric	6V	5 A	10 A	50 A	2 s	1 mOhms	12 mOhms	-40°C ~ 85°C	-	Surface Mount	1210 (3225 Metric), Concave	0.127" L x 0.101" W (3.22mm x 2.58mm)	-	0.047" (1.20mm)	-
MF-USML260/6-2 PTC RESET FUSE 6V 2.6A 1210 Bourns Inc.	0 In Stock Check Lead Time	1 : ¥6.65000 Cut Tape (CT) 5,000 : ¥2.69487 Tape & Reel (TR)	Multifuse®, MF-USML/X	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	Active	Polymeric	6V	2.6 A	5.2 A	50 A	5 s	4 mOhms	30 mOhms	-40°C ~ 85°C	-	Surface Mount	1210 (3225 Metric), Concave	0.127" L x 0.101" W (3.22mm x 2.58mm)	-	0.031" (0.80mm)	-
MF-USML450/6-2 PTC RESET FUSE 6V 4.5A 1210 Bourns Inc.	0 In Stock Check Lead Time	1 : ¥6.65000 Cut Tape (CT) 3,500 : ¥2.79851 Tape & Reel (TR)	Multifuse®, MF-USML/X	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	Active	Polymeric	6V	4.5 A	9 A	50 A	2 s	2 mOhms	14 mOhms	-40°C ~ 85°C	-	Surface Mount	1210 (3225 Metric), Concave	0.127" L x 0.101" W (3.22mm x 2.58mm)	-	0.047" (1.20mm)	-
MF-USML200/6-2 PTC RESET FUSE 6V 2A 1210 Bourns Inc.	0 In Stock Check Lead Time	1 : ¥6.65000 Cut Tape (CT) 5,000 : ¥2.69487 Tape & Reel (TR)	Multifuse®, MF-USML/X	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	Active	Polymeric	6V	2 A	4 A	50 A	5 s	5 mOhms	40 mOhms	-40°C ~ 85°C	-	Surface Mount	1210 (3225 Metric), Concave	0.127" L x 0.101" W (3.22mm x 2.58mm)	-	0.031" (0.80mm)	-

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PTC Resettable Fuses

PTC Resettable Fuses are designed to stop current flow when it exceeds a certain limit (overcurrent protection). The Fuses work by increasing its resistance as its temperature rises due to the current increase. The trip current ranges from 14 mA to 50 A with the Time to trip ranging from 8 ms to 90 s. PTC = Positive Temperature Coefficient.

PTC Resettable Fuses

PTC Resettable Fuses

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