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
SMD1812P010TFA PTC RESET FUSE 30V 100MA 1812 Littelfuse Inc.	6,676	-	RFQ	Datasheet	1812 (4532 Metric), Concave	POLY-FUSE®, SMD1812	Tape & Reel (TR)	Obsolete	Polymeric	30V	100 mA	300 mA	10 A	1.5 s	1.6 Ohms	15 Ohms	-	-40°C ~ 85°C	-	-	-	Surface Mount	0.179" L x 0.128" W (4.55mm x 3.24mm)	-	0.039" (1.00mm)	-
250R120-R1U PTC RESET FUSE 60V 120MA RADIAL Littelfuse Inc.	2,121	-	RFQ	Datasheet	Radial, Disc	POLY-FUSE®, 250R	Bulk	Obsolete	Polymeric	60V (250V Int)	120 mA	240 mA	3 A	2.5 s	6 Ohms	16 Ohms	-	-40°C ~ 85°C	-	-	-	Through Hole	0.256" L x 0.181" W (6.50mm x 4.60mm)	0.433" (11.00mm)	-	0.201" (5.10mm)
30ST350U PTC RESET FUSE 30V 3.5A STRAP Littelfuse Inc.	4,961	-	RFQ	Datasheet	Strap	POLY-FUSE®, ST	Bulk	Obsolete	Polymeric	30V	3.5 A	6.3 A	100 A	3 s	17 mOhms	31 mOhms	-	-40°C ~ 85°C	-	-	-	User Defined	1.185" L x 0.522" W (30.10mm x 13.25mm)	-	0.043" (1.10mm)	-
30ST420U PTC RESET FUSE 30V 4.2A STRAP Littelfuse Inc.	6,811	-	RFQ	Datasheet	Strap	POLY-FUSE®, ST	Bulk	Obsolete	Polymeric	30V	4.2 A	7.6 A	100 A	6 s	12 mOhms	40 mOhms	-	-40°C ~ 85°C	-	-	-	User Defined	1.240" L x 0.522" W (31.50mm x 13.25mm)	-	0.043" (1.10mm)	-
BBRF750 PTC RESET FUSE 99V 750MA RADIAL Littelfuse Inc.	7,428	-	RFQ	Datasheet	Radial, Disc	PolySwitch®	Bulk	Obsolete	Polymeric	99V	750 mA	1.5 A	20 A	60 s	400 mOhms	1.2 Ohms	-	-	-	-	-	Through Hole	-	-	-	-
1206L020/30YR-A PTC 30V POLYFUSE SURF MOUNT 1206 Littelfuse Inc.	4,332	-	RFQ	Datasheet	1206 (3216 Metric), Concave	POLY-FUSE®, 1206L	Tape & Reel (TR)	Active	Polymeric	30V	200 mA	420 mA	100 A	100 ms	650 mOhms	2.6 Ohms	-	-40°C ~ 85°C	-	-	-	Surface Mount	0.126" L x 0.065" W (3.20mm x 1.65mm)	-	0.039" (1.00mm)	-
SMD2920P260TFA PTC RESET FUSE 6V 2.6A 2920 Littelfuse Inc.	2,136	-	RFQ	Datasheet	2920 (7351 Metric), Concave	POLY-FUSE®, SMD2920	Tape & Reel (TR)	Obsolete	Polymeric	6V	2.6 A	5.2 A	40 A	10 s	25 mOhms	75 mOhms	-	-40°C ~ 85°C	-	-	-	Surface Mount	0.290" L x 0.202" W (7.36mm x 5.12mm)	-	0.031" (0.78mm)	-
RHEF900-2 PTC RESET FUSE 16V 9A RADIAL Littelfuse Inc.	3,687	-	RFQ	Datasheet	Radial, Disc	PolySwitch®, RHEF	Tape & Reel (TR)	Obsolete	Polymeric	16V	9 A	16.5 A	100 A	10 s	7.4 mOhms	17 mOhms	-	-40°C ~ 125°C	-	-	-	Through Hole	0.650" L x 0.118" W (16.50mm x 3.00mm)	1.012" (25.70mm)	-	0.199" (5.05mm)
RHEF900-AP PTC RESET FUSE 16V 9A RADIAL Littelfuse Inc.	2,025	-	RFQ	Datasheet	Radial, Disc	PolySwitch®, RHEF	Tape & Box (TB)	Obsolete	Polymeric	16V	9 A	16.5 A	100 A	10 s	7.4 mOhms	17 mOhms	-	-40°C ~ 125°C	-	-	-	Through Hole	0.650" L x 0.118" W (16.50mm x 3.00mm)	1.012" (25.70mm)	-	0.199" (5.05mm)
TRF600-150-R2-B-0.5 PTC RESET FUSE 250V 150MA RADIAL Littelfuse Inc.	2,065	-	RFQ	Datasheet	Radial, Disc	PolySwitch®, TRF600	Bag	Obsolete	Polymeric	250V (600V Int)	150 mA	300 mA	3 A	3 s	7 Ohms	17 Ohms	-	-40°C ~ 85°C	-	-	-	Through Hole	0.354" L x 0.181" W (9.00mm x 4.60mm)	0.492" (12.50mm)	-	0.197" (5.00mm)

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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.

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

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