Circuit Protection

FSA-300MA

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OptiFuse

FUSE GLASS 300MA 250VAC 3AB 3AG

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Circuit Protection

FSA-300MA

Active

OptiFuse

FUSE GLASS 300MA 250VAC 3AB 3AG

Deep-Dive with AI

DocumentsDatasheet

Specifications Series Pricing Description Documents

Technical Specifications

Parameters and characteristics for this part

Specification	FSA-300MA

Approval Agency	cULus, UL 248
Breaking Capacity @ Rated Voltage	100 A
Current Rating (Amps)	0.3 A
Fuse Type	Cartridge, Glass
Melting I˛t	0.0215
Melting I²t	0.0215
Mounting Type	Requires Holder
Operating Temperature [Max]	125 °C
Operating Temperature [Min]	-55 C
Package / Case	3AG, 3AB
Package / Case [x]	0.25 in
Package / Case [y]
Response Time	Fast Blow
Size / Dimension [diameter]	6.35 mm
Size / Dimension [diameter]	0.25 "
Size / Dimension [x]	31.8 mm
Size / Dimension [x]	1.252 "
Voltage Rating - AC	250 V

FSA Series

Part	Melting I˛t	Voltage Rating - AC	Breaking Capacity @ Rated Voltage	Current Rating (Amps)	Size / Dimension [x]	Size / Dimension [x]	Size / Dimension [diameter]	Size / Dimension [diameter]	Operating Temperature [Min]	Operating Temperature [Max]	Mounting Type	Melting I²t	Fuse Type	Package / Case [x]	Package / Case	Response Time	Approval Agency	Voltage Rating - DC	Size / Dimension [diameter]	Size / Dimension [x]
OptiFuse FSA-300MA	0.0215	250 V	100 A	0.3 A	31.8 mm	1.252 "	6.35 mm	0.25 "	-55 C	125 °C	Requires Holder	0.0215	Cartridge Glass	0.25 in	3AB 3AG	Fast Blow	cULus UL 248
OptiFuse FSA-100MA	0.00194	250 V	100 A	100 mA	31.8 mm	1.252 "	6.35 mm	0.25 "	-55 C	125 °C	Requires Holder	0.00194	Cartridge Glass	0.25 in	3AB 3AG	Fast Blow	cULus UL 248
OptiFuse FSA-20A	2000	250 V	300 A	20 A	31.8 mm	1.252 "	6.35 mm	0.25 "	-55 C	125 °C	Requires Holder	2000	Cartridge Glass	0.25 in	3AB 3AG	Fast Blow	cURus UL 248	32 V
OptiFuse FSA-10A		250 V	200 A	10 A	31.8 mm	1.252 "	6.35 mm	0.25 "	-55 C	125 °C	Requires Holder	370.2	Cartridge Glass	0.25 in	3AB 3AG	Fast Blow	cULus UL 248
OptiFuse FSA-125MA	0.00373	250 V	100 A	0.125 Amps	31.8 mm	1.252 "	6.35 mm	0.25 "	-55 C	125 °C	Requires Holder	0.00373 I²t	Cartridge Glass	0.25 in	3AB 3AG	Fast Blow	cULus UL 248
OptiFuse FSA-P-5A	72.54	250 V	200 A	5 A	32.4 mm		6.85 mm		-55 C	125 °C	Through Hole	72.54	Cartridge Glass	0.25 "	3AB 3AG	Fast Blow	cULus UL 248		0.27 in	1.276 "
OptiFuse FSA-30A		250 V	300 A	30 A	31.8 mm	1.252 "	6.35 mm	0.25 "	-55 C	125 °C	Requires Holder	5400 I²t	Cartridge Glass	0.25 in	3AB 3AG	Fast Blow	cURus UL 248	32 V
OptiFuse FSA-P-500MA	0.112	250 V	100 A	0.5 A	32.4 mm		6.85 mm		-55 C	125 °C	Through Hole	0.112	Cartridge Glass	0.25 "	3AB 3AG	Fast Blow	cULus UL 248		0.27 in	1.276 "
OptiFuse FSA-7A	195.3	250 V	200 A	7 A	31.8 mm	1.252 "	6.35 mm	0.25 "	-55 C	125 °C	Requires Holder	195.3 I²t	Cartridge Glass	0.25 in	3AB 3AG	Fast Blow	cULus UL 248
OptiFuse FSA-2.5A	14.21	250 V	100 A	2.5 A	31.8 mm	1.252 "	6.35 mm	0.25 "	-55 C	125 °C	Requires Holder	14.21	Cartridge Glass	0.25 in	3AB 3AG	Fast Blow	cULus UL 248

Pricing

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

Distributor	Package	Quantity	$

Digikey	Bulk	1	$ 0.98
		10	$ 0.94
		25	$ 0.87
		50	$ 0.76
		100	$ 0.71
		250	$ 0.67
		500	$ 0.62
		1000	$ 0.60
	N/A	2476	$ 1.09

Description

General part information

FSA Series

300 mA 250 V AC DC Fuse Cartridge, Glass Requires Holder 3AB, 3AG, 1/4" x 1-1/4"

Documents

Technical documentation and resources