PTC Resettable Fuses

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Mfr. Part #	Availability	Price	Quantity	Datasheet	Package/Case	Series	Packaging	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)	Resistance - 25°C (Typ)	Operating Temperature	Grade	Qualification	Ratings	Mounting Type	Size / Dimension	Height - Seated (Max)	Thickness (Max)	Lead Spacing
MF-R090-0-009 PTC RESET FUSE 30V 900MA RADIAL Bourns Inc.	6,655	-	RFQ	Datasheet	Radial, Disc	Multifuse®, MF-R	Bulk	Obsolete	Polymeric	30V	900 mA	1.8 A	40 A	5.9 s	70 mOhms	220 mOhms	-	-40°C ~ 85°C	-	-	-	Through Hole	0.291" L x 0.118" W (7.40mm x 3.00mm)	0.480" (12.20mm)	-	0.201" (5.10mm)
MF-R250-0-010 PTC RESET FUSE 30V 2.5A RADIAL Bourns Inc.	9,364	-	RFQ	Datasheet	Radial, Disc	Multifuse®, MF-R	Bulk	Obsolete	Polymeric	30V	2.5 A	5 A	40 A	10.3 s	25 mOhms	70 mOhms	-	-40°C ~ 85°C	-	-	-	Through Hole	0.472" L x 0.118" W (12.00mm x 3.00mm)	0.720" (18.30mm)	-	0.201" (5.10mm)
MF-RX110 PTC RESET FUSE 60V 1.1A RADIAL Bourns Inc.	8,856	-	RFQ	Datasheet	Radial, Disc	Multifuse®, MF-RX	Bulk	Obsolete	Polymeric	60V	1.1 A	2.2 A	40 A	8.2 s	150 mOhms	380 mOhms	-	-40°C ~ 85°C	-	-	-	Through Hole	0.427" L x 0.122" W (10.84mm x 3.10mm)	0.662" (16.84mm)	-	0.201" (5.10mm)
MF-RX135 PTC RESET FUSE 60V 1.35A RADIAL Bourns Inc.	6,188	-	RFQ	Datasheet	Radial, Disc	Multifuse®, MF-RX	Bulk	Obsolete	Polymeric	60V	1.35 A	2.7 A	40 A	9.6 s	120 mOhms	300 mOhms	-	-40°C ~ 85°C	-	-	-	Through Hole	0.483" L x 0.122" W (12.26mm x 3.10mm)	0.718" (18.26mm)	-	0.201" (5.10mm)
MF-RX160 PTC RESET FUSE 60V 1.6A RADIAL Bourns Inc.	2,371	-	RFQ	Datasheet	Radial, Disc	Multifuse®, MF-RX	Bulk	Obsolete	Polymeric	60V	1.6 A	3.2 A	40 A	11.4 s	90 mOhms	220 mOhms	-	-40°C ~ 85°C	-	-	-	Through Hole	0.642" L x 0.122" W (16.30mm x 3.10mm)	0.839" (21.30mm)	-	0.201" (5.10mm)
MF-RX185 PTC RESET FUSE 60V 1.85A RADIAL Bourns Inc.	7,292	-	RFQ	Datasheet	Radial, Disc	Multifuse®, MF-RX	Bulk	Obsolete	Polymeric	60V	1.85 A	3.7 A	40 A	12.6 s	80 mOhms	190 mOhms	-	-40°C ~ 85°C	-	-	-	Through Hole	0.701" L x 0.122" W (17.80mm x 3.10mm)	0.902" (22.90mm)	-	0.201" (5.10mm)
MF-RX250 PTC RESET FUSE 60V 2.5A RADIAL Bourns Inc.	3,349	-	RFQ	Datasheet	Radial, Disc	Multifuse®, MF-RX	Bulk	Obsolete	Polymeric	60V	2.5 A	5 A	40 A	15.6 s	50 mOhms	130 mOhms	-	-40°C ~ 85°C	-	-	-	Through Hole	0.839" L x 0.122" W (21.30mm x 3.10mm)	1.039" (26.40mm)	-	0.402" (10.20mm)
MF-RX300 PTC RESET FUSE 60V 3A RADIAL Bourns Inc.	8,869	-	RFQ	Datasheet	Radial, Disc	Multifuse®, MF-RX	Bulk	Obsolete	Polymeric	60V	3 A	6 A	40 A	19.8 s	40 mOhms	100 mOhms	-	-40°C ~ 85°C	-	-	-	Through Hole	0.980" L x 0.122" W (24.90mm x 3.10mm)	1.181" (30.00mm)	-	0.402" (10.20mm)
MF-RX375 PTC RESET FUSE 60V 3.75A RADIAL Bourns Inc.	8,300	-	RFQ	Datasheet	Radial, Disc	Multifuse®, MF-RX	Bulk	Obsolete	Polymeric	60V	3.75 A	7.5 A	40 A	24 s	30 mOhms	80 mOhms	-	-40°C ~ 85°C	-	-	-	Through Hole	1.118" L x 0.122" W (28.40mm x 3.10mm)	1.319" (33.50mm)	-	0.402" (10.20mm)
MF-R055/90-0 PTC RESET FUSE 90V 550MA RADIAL Bourns Inc.	8,905	-	RFQ	Datasheet	Radial, Disc	Multifuse®, MF-R/90	Bulk	Obsolete	Polymeric	90V	550 mA	1.1 A	10 A	60 s	450 mOhms	2 Ohms	-	-40°C ~ 85°C	-	-	-	Through Hole	0.429" Dia x 0.142" T (10.90mm x 3.60mm)	0.657" (16.70mm)	-	0.201" (5.10mm)

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FREQUENTLY ASKED QUESTIONS

PTC Resettable Fuses FAQ

Common questions about filtering, comparing and sourcing PTC Resettable Fuses components.

How can I narrow the PTC Resettable Fuses selection?

Use the available manufacturer and technical parameter filters to reduce the product list. Compare the remaining part numbers against your electrical, package and application requirements.

Should I confirm the datasheet before selecting a part?

Yes. Always review the manufacturer datasheet to confirm ratings, package, operating conditions and other technical details before finalizing a component for your design.

Can Winsun (HK) Electronics help source a specific PTC Resettable Fuses part number?

Yes. Send the exact manufacturer part number and required quantity for availability, lead-time and quotation support.

Do you support BOM, shortage or alternative-part requirements?

Yes. You can submit a BOM or shortage list for sourcing assistance. Where appropriate, our team can also help review possible alternative-part options.