Circuit Protection

0451004.MRSN

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LITTELFUSE

SURFACE MOUNT FUSES 125VAC 4A .016OHMS 451 NANO2

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Circuit Protection

0451004.MRSN

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LITTELFUSE

SURFACE MOUNT FUSES 125VAC 4A .016OHMS 451 NANO2

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Specifications Series Pricing Description Documents

Technical Specifications

Parameters and characteristics for this part

Specification	0451004.MRSN

Approval Agency	CSA, UR, METI
Breaking Capacity @ Rated Voltage	50 A
Current Rating (Amps)	4 A
DC Cold Resistance	0.016 Ohms
Fuse Type	Board Mount (Cartridge Style Excluded)
Mounting Type	Surface Mount
Operating Temperature [Max]	125 °C
Operating Temperature [Min]	-55 C
Package / Case	2-SMD, Square End Block
Response Time	Fast Blow
Size / Dimension [x]	0.24 "
Size / Dimension [x]	6.1 mm
Size / Dimension [y]	0.106 in
Size / Dimension [y]	2.69 mm
Size / Dimension [z]	0.106 in
Size / Dimension [z]	2.69 mm
Voltage Rating - AC	125 V

451 Series

FUSE 125V V/FA NANO2 W/Au CAPS RoHS.125A

Part	DC Cold Resistance	Voltage Rating - AC	Package / Case	Fuse Type	Breaking Capacity @ Rated Voltage	Current Rating (Amps)	Response Time	Size / Dimension [y]	Size / Dimension [y]	Size / Dimension [x]	Size / Dimension [x]	Size / Dimension [z]	Size / Dimension [z]	Operating Temperature [Min]	Operating Temperature [Max]	Mounting Type	Approval Agency	Voltage Rating - DC	Melting I²t
LITTELFUSE 0451004.MRSN	0.016 Ohms	125 V	2-SMD Square End Block	Board Mount (Cartridge Style Excluded)	50 A	4 A	Fast Blow	0.106 in	2.69 mm	0.24 "	6.1 mm	0.106 in	2.69 mm	-55 C	125 °C	Surface Mount	CSA METI UR
LITTELFUSE 045101.5MRL	0.063 Ohms	125 V	2-SMD Square End Block	Board Mount (Cartridge Style Excluded)	50 A	1.5 A	Fast Blow	0.106 in	2.69 mm	0.24 "	6.1 mm	0.106 in	2.69 mm	-55 C	125 °C	Surface Mount	CSA PSE UL	125 VDC	0.853
LITTELFUSE 0451.500MRL		125 V	2-SMD Square End Block	Board Mount (Cartridge Style Excluded)	50 A	0.5 A	Fast Blow	0.106 in	2.69 mm	0.24 "	6.1 mm	0.106 in	2.69 mm	-55 C	125 °C	Surface Mount	CSA UL	125 VDC	0.0795
LITTELFUSE 0451003.NRL	0.0227 Ohms	125 V	2-SMD Square End Block	Board Mount (Cartridge Style Excluded)	50 A	3 A	Fast Blow	0.106 in	2.69 mm	0.24 "	6.1 mm	0.106 in	2.69 mm	-55 C	125 °C	Surface Mount	CSA PSE UL	125 VDC	1.65 I²t
LITTELFUSE 0451015.MRL	0.0037 Ohms	65 V	2-SMD Square End Block	Board Mount (Cartridge Style Excluded)	50 A	15 A	Fast Blow	0.106 in	2.69 mm	0.24 "	6.1 mm	0.106 in	2.69 mm	-55 C	125 °C	Surface Mount	CSA UL	65 VDC	97.82
LITTELFUSE 0451.080MRL		125 V	2-SMD Square End Block	Board Mount (Cartridge Style Excluded)	50 A	80 mA	Fast Blow	0.106 in	2.69 mm	0.24 "	6.1 mm	0.106 in	2.69 mm	-55 C	125 °C	Surface Mount	CSA UL	125 VDC	0.00033
LITTELFUSE 045102.5MRL	0.0286 Ohms	125 V	2-SMD Square End Block	Board Mount (Cartridge Style Excluded)	50 A	2.5 A	Fast Blow	0.106 in	2.69 mm	0.24 "	6.1 mm	0.106 in	2.69 mm	-55 C	125 °C	Surface Mount	CSA PSE UL	125 VDC	1.029
LITTELFUSE 0451.125MRL	1.7 Ohms	125 V	2-SMD Square End Block	Board Mount (Cartridge Style Excluded)	50 A	0.125 Amps	Fast Blow	0.106 in	2.69 mm	0.24 "	6.1 mm	0.106 in	2.69 mm	-55 C	125 °C	Surface Mount	CSA UL	125 VDC	0.00286

Pricing

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

Distributor	Package	Quantity	$

Digikey	Cut Tape (CT)	1	$ 1.34
		5	$ 1.30
		10	$ 1.22
		50	$ 1.01
		100	$ 0.84
		250	$ 0.82
		500	$ 0.69
	N/A	1925	$ 1.76
	Tape & Reel (TR)	1000	$ 0.58
Mouser	N/A	1	$ 1.43
		5	$ 1.19
		10	$ 1.10
		50	$ 0.91
		100	$ 0.84
		250	$ 0.75
		500	$ 0.69
		1000	$ 0.59
		2000	$ 0.57
Newark	Each (Supplied on Full Reel)	1000	$ 0.80
		2000	$ 0.72
		4000	$ 0.65
		6000	$ 0.63
		10000	$ 0.61

Description

General part information

451 Series

The Nano2 SMF Fuse is a very small, square surface mount fuse that is also available in a surface mount holder.

Documents

Technical documentation and resources