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-R185-AP-99 PTC RESET FUSE 30V 1.85A RADIAL Bourns Inc.	6,878	-	RFQ	Datasheet	Radial, Disc	Multifuse®, MF-R	Tape & Box (TB)	Obsolete	Polymeric	30V	1.85 A	3.7 A	40 A	8.7 s	40 mOhms	110 mOhms	-	-40°C ~ 85°C	-	-	-	Through Hole	0.472" Dia x 0.118" T (12.00mm x 3.00mm)	0.724" (18.40mm)	-	0.201" (5.10mm)
MF-R250-AP-10-99 PTC RESET FUSE 30V 2.5A RADIAL Bourns Inc.	2,179	-	RFQ	Datasheet	Radial, Disc	Multifuse®, MF-R	Tape & Box (TB)	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-R250-AP-99 PTC RESET FUSE 30V 2.5A RADIAL Bourns Inc.	4,260	-	RFQ	Datasheet	Radial, Disc	Multifuse®, MF-R	Tape & Box (TB)	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-R400-AP-99 PTC RESET FUSE 30V 4A RADIAL Bourns Inc.	4,766	-	RFQ	Datasheet	Radial, Disc	Multifuse®, MF-R	Tape & Box (TB)	Obsolete	Polymeric	30V	4 A	8 A	40 A	12.7 s	10 mOhms	50 mOhms	-	-40°C ~ 85°C	-	-	-	Through Hole	0.567" L x 0.118" W (14.40mm x 3.00mm)	0.976" (24.80mm)	-	0.201" (5.10mm)
MF-R500-AP-99 PTC RESET FUSE 30V 5A RADIAL Bourns Inc.	9,051	-	RFQ	Datasheet	Radial, Disc	Multifuse®, MF-R	Tape & Box (TB)	Obsolete	Polymeric	30V	5 A	10 A	40 A	14.5 s	10 mOhms	50 mOhms	-	-40°C ~ 85°C	-	-	-	Through Hole	0.685" L x 0.118" W (17.40mm x 3.00mm)	0.980" (24.90mm)	-	0.402" (10.20mm)
MF-R600-AP-99 PTC RESET FUSE 30V 6A RADIAL Bourns Inc.	4,957	-	RFQ	Datasheet	Radial, Disc	Multifuse®, MF-R	Tape & Box (TB)	Obsolete	-	30V	6 A	12 A	40 A	16 s	-	-	-	-	-	-	-	Through Hole	0.760" L x 0.118" W (19.30mm x 3.00mm)	1.256" (31.90mm)	-	0.215" (5.45mm)
MF-R700-AP-99 PTC RESET FUSE 30V 7A RADIAL Bourns Inc.	3,634	-	RFQ	Datasheet	Radial, Disc	Multifuse®, MF-R	Tape & Box (TB)	Obsolete	Polymeric	30V	7 A	14 A	40 A	17.5 s	5 mOhms	30 mOhms	-	-40°C ~ 85°C	-	-	-	Through Hole	0.870" L x 0.118" W (22.10mm x 3.00mm)	1.173" (29.80mm)	-	0.402" (10.20mm)
MF-R800-AP-99 PTC RESET FUSE 30V 8A RADIAL Bourns Inc.	9,299	-	RFQ	Datasheet	Radial, Disc	Multifuse®, MF-R	Tape & Box (TB)	Obsolete	Polymeric	30V	8 A	16 A	40 A	18.8 s	5 mOhms	30 mOhms	-	-40°C ~ 85°C	-	-	-	Through Hole	0.953" L x 0.118" W (24.20mm x 3.00mm)	1.295" (32.90mm)	-	0.402" (10.20mm)
MF-R900-AP-99 PTC RESET FUSE 30V 9A RADIAL Bourns Inc.	9,592	-	RFQ	Datasheet	Radial, Disc	Multifuse®, MF-R	Tape & Box (TB)	Obsolete	Polymeric	30V	9 A	18 A	40 A	20 s	5 mOhms	20 mOhms	-	-40°C ~ 85°C	-	-	-	Through Hole	0.953" L x 0.118" W (24.20mm x 3.00mm)	1.295" (32.90mm)	-	0.402" (10.20mm)
MF-RX110-AP PTC RESET FUSE 60V 1.1A RADIAL Bourns Inc.	2,062	-	RFQ	Datasheet	Radial, Disc	Multifuse®, MF-RX	Tape & Box (TB)	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)

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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.