Circuit Protection

TRF250-145ST-B-0.5

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LITTELFUSE

RESETTABLE FUSES - PPTC 60V 3A 1.00W POLYSWITCH RESET DEV

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DocumentsTRF250-145ST-B-0.5 | Datasheet

Circuit Protection

TRF250-145ST-B-0.5

Active

LITTELFUSE

RESETTABLE FUSES - PPTC 60V 3A 1.00W POLYSWITCH RESET DEV

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DocumentsTRF250-145ST-B-0.5 | Datasheet

Specifications Series Pricing Description Documents

Technical Specifications

Parameters and characteristics for this part

Specification	TRF250-145ST-B-0.5

Approval Agency	TUV, CSA, UL
Current - Hold (Ih) (Max) [Max]	145 mA
Current - Max [Max]	3 A
Current - Trip (It)	290 mA
Height - Seated (Max) [Max] [z]	11 mm
Height - Seated (Max) [Max] [z]	0.433 in
Lead Spacing	0.197 "
Lead Spacing	5 mm
Mounting Type	Through Hole
Operating Temperature [Max]	85 °C
Operating Temperature [Min]	-40 C
Package / Case	Disc, Radial
Resistance - Initial (Ri) (Min) [Min]	3 Ohms
Resistance - Post Trip (R1) (Max) [Max]	14 Ohms
Size / Dimension [x]	6.5 mm
Size / Dimension [x]	0.256 in
Size / Dimension [y]	4.6 mm
Size / Dimension [y]	0.181 in
Time to Trip	2.5 s
Type	Polymeric
Voltage - Max [Max]	60 V

TRF250 Series

Part	Operating Temperature [Max]	Operating Temperature [Min]	Current - Trip (It)	Type	Package / Case	Lead Spacing	Lead Spacing	Height - Seated (Max) [Max] [z]	Height - Seated (Max) [Max] [z]	Resistance - Post Trip (R1) (Max) [Max]	Current - Hold (Ih) (Max) [Max]	Current - Max [Max]	Time to Trip	Size / Dimension [diameter]	Size / Dimension [custom]	Size / Dimension [custom]	Size / Dimension [diameter]	Resistance - Initial (Ri) (Min) [Min]	Voltage - Max [Max]	Mounting Type	Height - Seated (Max) [Max] [z]	Size / Dimension [x]	Size / Dimension [y]	Size / Dimension [x]	Size / Dimension [y]	Approval Agency	Height - Seated (Max) [Max]	Height - Seated (Max) [Max]
LITTELFUSE TRF250-055UT	85 °C	-40 C	170 mA	Polymeric	Disc Radial	0.2 in	5.08 mm	9.3 mm	0.366 in	35 Ohms	55 mA	3 A	5 s	0.189 in	0.15 in	3.8 mm	4.8 mm	15 Ohms	60 V	Through Hole
LITTELFUSE TRF250-145	85 °C	-40 C	290 mA	Polymeric	Disc Radial	0.197 "	5 mm		11 mm	14 Ohms	145 mA	3 A	5 s					3 Ohms	60 V	Through Hole	0.433 in	6.5 mm	4.6 mm	0.256 in	0.181 in
LITTELFUSE TRF250-120T-RA-B-0.5	85 °C	-40 C	240 mA	Polymeric	Disc Radial	0.197 "	5 mm		11 mm	16 Ohms	120 mA	3 A	1.2 s						60 V	Through Hole	0.433 in	6.5 mm	4.6 mm	0.256 in	0.181 in	CSA TUV UL
LITTELFUSE TRF250-145ST-B-0.5	85 °C	-40 C	290 mA	Polymeric	Disc Radial	0.197 "	5 mm		11 mm	14 Ohms	145 mA	3 A	2.5 s					3 Ohms	60 V	Through Hole	0.433 in	6.5 mm	4.6 mm	0.256 in	0.181 in	CSA TUV UL
LITTELFUSE TRF250-120T-RC-B-0.5	85 °C	-40 C	260 mA	Polymeric	Disc Radial	0.197 "	5 mm		11 mm	14 Ohms	120 mA	3 A	3 s					5.4 Ohms	60 V	Through Hole	0.433 in	6.5 mm	4.6 mm	0.256 in	0.181 in
LITTELFUSE TRF250-110U-B-0.5-2	85 °C	-40 C	220 mA	Polymeric	Disc Radial	0.197 "	5 mm			16 Ohms	110 mA	3 A	750 ms					5 Ohms	60 V	Through Hole						CSA TUV UR	9.4 mm	0.37 in
LITTELFUSE TRF250-120T-B-0.5	85 °C	-40 C	240 mA	Polymeric	Disc Radial	0.197 "	5 mm			16 Ohms	120 mA	3 A	1.2 s						60 V	Through Hole		6 mm	3.8 mm	0.236 in	0.15 "	CSA TUV UL	10 mm	0.394 in

Pricing

Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly

Distributor	Package	Quantity	$

Digikey	N/A	0	$ 0.00

Description

General part information

TRF250 Series

Polymeric PTC Resettable Fuse 60V (250V Int) 145 mA Ih Through Hole Radial, Disc

Documents

Technical documentation and resources

TRF250-145ST-B-0.5 | Datasheet

Datasheet