Very Fast-Acting Fuses | McMaster-Carr

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About Fuses

Ferrule Style

Knife-Blade Style

With a quicker response than standard fast-acting fuses, these fuses provide the best protection for sensitive electronics.

Breakthrough current, labeled on the fuse as IR, is the maximum current that a fuse can safely stop in the event of a short circuit.

For technical drawings and 3-D models, click on a part number.

			Overall
Current, A	Voltage	Breakthrough Current	Lg.	Dia.	No. of Elements	Cartridge Fuse Style	Protection Type	Specifications Met		Each
Manufacturer Equivalent: A15QS, FWA, L15S
10	150V AC	100,000 A @ 150 V AC	1 1/2"	7/16"	1	Ferrule	Fast Acting	UL Recognized Component	00000000	000000
15	150V AC	100,000 A @ 150 V AC	1 1/2"	7/16"	1	Ferrule	Fast Acting	UL Recognized Component	00000000	00000
100	150V AC	100,000 A @ 150 V AC	2 11/16"	1 1/8"	1	Knife Blade	Fast Acting	UL Recognized Component	00000000	00000
150	150V AC	100,000 A @ 150 V AC	2 11/16"	1 1/8"	1	Knife Blade	Fast Acting	UL Recognized Component	00000000	00000
200	150V AC	100,000 A @ 150 V AC	2 11/16"	1 1/8"	1	Knife Blade	Fast Acting	UL Recognized Component	00000000	00000
250	150V AC	100,000 A @ 150 V AC	2 11/16"	1 1/8"	1	Knife Blade	Fast Acting	UL Recognized Component	00000000	00000
300	150V AC	100,000 A @ 150 V AC	2 11/16"	1 1/8"	1	Knife Blade	Fast Acting	UL Recognized Component	00000000	00000
400	150V AC	100,000 A @ 150 V AC	2 11/16"	1 1/8"	1	Knife Blade	Fast Acting	UL Recognized Component	00000000	00000
Manufacturer Equivalent: A30QS, FWX, L25S
10	250V AC	200,000 A @ 250 V AC	2"	9/16"	1	Ferrule	Fast Acting	UL Recognized Component	000000000	00000
20	250V AC	200,000 A @ 250 V AC	2"	9/16"	1	Ferrule	Fast Acting	UL Recognized Component	000000000	00000
25	250V AC	200,000 A @ 250 V AC	2"	9/16"	1	Ferrule	Fast Acting	UL Recognized Component	000000000	00000
30	250V AC	200,000 A @ 250 V AC	2"	9/16"	1	Ferrule	Fast Acting	UL Recognized Component	000000000	00000
40	250V AC	200,000 A @ 250 V AC	3 3/16"	13/16"	1	Knife Blade	Fast Acting	UL Recognized Component	000000000	00000
50	250V AC	200,000 A @ 250 V AC	3 3/16"	13/16"	1	Knife Blade	Fast Acting	UL Recognized Component	000000000	00000
60	250V AC	200,000 A @ 250 V AC	3 3/16"	13/16"	1	Knife Blade	Fast Acting	UL Recognized Component	000000000	00000
80	250V AC	200,000 A @ 250 V AC	3 1/8"	1 1/4"	1	Knife Blade	Fast Acting	UL Recognized Component	000000000	000000
100	250V AC	200,000 A @ 250 V AC	3 1/8"	1 1/4"	1	Knife Blade	Fast Acting	UL Recognized Component	000000000	000000
200	250V AC	200,000 A @ 250 V AC	3 1/8"	1 1/4"	1	Knife Blade	Fast Acting	UL Recognized Component	000000000	000000
400	250V AC	200,000 A @ 250 V AC	3 13/16"	1 1/2"	1	Knife Blade	Fast Acting	UL Recognized Component	000000000	000000
Manufacturer Equivalent: A50QS, FWH, L50S
10	500V AC	200,000 A @ 500 V AC	2"	9/16"	1	Ferrule	Fast Acting	UL Recognized Component	000000000	00000
20	500V AC	200,000 A @ 500 V AC	2"	9/16"	1	Ferrule	Fast Acting	UL Recognized Component	000000000	00000
30	500V AC	200,000 A @ 500 V AC	2"	9/16"	1	Ferrule	Fast Acting	UL Recognized Component	000000000	00000
40	500V AC	200,000 A @ 500 V AC	3 3/16"	13/16"	1	Knife Blade	Fast Acting	UL Recognized Component	000000000	00000
50	500V AC	200,000 A @ 500 V AC	3 3/16"	13/16"	1	Knife Blade	Fast Acting	UL Recognized Component	000000000	00000
60	500V AC	200,000 A @ 500 V AC	3 3/16"	13/16"	1	Knife Blade	Fast Acting	UL Recognized Component	000000000	00000
80	500V AC	200,000 A @ 500 V AC	3 5/8"	15/16"	1	Knife Blade	Fast Acting	UL Recognized Component	000000000	00000
100	500V AC	200,000 A @ 500 V AC	3 5/8"	15/16"	1	Knife Blade	Fast Acting	UL Recognized Component	000000000	00000
125	500V AC	200,000 A @ 500 V AC	3 5/8"	1 3/16"	1	Knife Blade	Fast Acting	UL Recognized Component	000000000	000000
150	500V AC	200,000 A @ 500 V AC	3 5/8"	1 3/16"	1	Knife Blade	Fast Acting	UL Recognized Component	000000000	000000
200	500V AC	200,000 A @ 500 V AC	3 5/8"	1 3/16"	1	Knife Blade	Fast Acting	UL Recognized Component	000000000	000000
300	500V AC	200,000 A @ 500 V AC	4 5/16"	1 1/2"	1	Knife Blade	Fast Acting	UL Recognized Component	000000000	000000
400	500V AC	200,000 A @ 500 V AC	4 5/16"	1 1/2"	1	Knife Blade	Fast Acting	UL Recognized Component	000000000	000000
600	500V AC	200,000 A @ 500 V AC	4 5/16"	2"	1	Knife Blade	Fast Acting	UL Recognized Component	000000000	000000
Manufacturer Equivalent: A70QS, FWP, L70S
10	700V AC	200,000 A @ 700 V AC	2"	9/16"	1	Ferrule	Fast Acting	UL Recognized Component	000000000	00000
20	700V AC	200,000 A @ 700 V AC	2"	9/16"	1	Ferrule	Fast Acting	UL Recognized Component	000000000	00000
25	700V AC	200,000 A @ 700 V AC	2"	9/16"	1	Ferrule	Fast Acting	UL Recognized Component	000000000	00000
30	700V AC	200,000 A @ 700 V AC	2"	9/16"	1	Ferrule	Fast Acting	UL Recognized Component	000000000	00000
32	700V AC	200,000 A @ 700 V AC	2"	9/16"	1	Ferrule	Fast Acting	UL Recognized Component	00000000	00000
40	700V AC	200,000 A @ 700 V AC	2"	9/16"	1	Ferrule	Fast Acting	UL Recognized Component	000000000	00000
50	700V AC	200,000 A @ 700 V AC	2"	9/16"	1	Ferrule	Fast Acting	UL Recognized Component	00000000	00000
63	700V AC	200,000 A @ 700 V AC	2 5/16"	7/8"	1	Ferrule	Fast Acting	UL Recognized Component	00000000	00000
150	700V AC	200,000 A @ 700 V AC	5 1/16"	1 1/2"	1	Knife Blade	Fast Acting	UL Recognized Component	00000000	000000
400	700V AC	200,000 A @ 700 V AC	5 1/16"	2"	1	Knife Blade	Fast Acting	UL Recognized Component	00000000	000000

Fast-Acting Lift Truck Fuses

These fuses open circuits quickly when surges are detected. Use them on battery-operated lift trucks.

Breakthrough current, labeled on the fuse as IR, is the maximum current that a fuse can safely stop in the event of a short circuit.

Fuses with blown fuse indicator have a dot on the side that changes color when the fuse blows.

For technical drawings and 3-D models, click on a part number.

Fuses
			Overall							Holders
Current, A	Voltage	Breakthrough Current	Lg.	Wd.	No. of Elements	Blown Fuse Indicator	Specifications Met		Each		Each
Manufacturer Equivalent: ANN, CNN
35	125V AC/80V DC	2,500 A @ 125 V AC 2,700 A @ 80 V DC	3 3/16"	7/8"	1	Yes	UL Recognized Component	000000000	000000	00000000	000000
40	125V AC/80V DC	2,500 A @ 125 V AC 2,700 A @ 80 V DC	3 3/16"	7/8"	1	Yes	UL Recognized Component	000000000	00000	00000000	00000
50	125V AC/80V DC	2,500 A @ 125 V AC 2,700 A @ 80 V DC	3 3/16"	7/8"	1	Yes	UL Recognized Component	000000000	00000	00000000	00000
60	125V AC/80V DC	2,500 A @ 125 V AC 2,700 A @ 80 V DC	3 3/16"	7/8"	1	Yes	UL Recognized Component	000000000	00000	00000000	00000
80	125V AC/80V DC	2,500 A @ 125 V AC 2,700 A @ 80 V DC	3 3/16"	7/8"	1	Yes	UL Recognized Component	000000000	00000	00000000	00000
90	125V AC/80V DC	2,500 A @ 125 V AC 2,700 A @ 80 V DC	3 3/16"	7/8"	1	Yes	UL Recognized Component	000000000	00000	00000000	00000
100	125V AC/80V DC	2,500 A @ 125 V AC 2,700 A @ 80 V DC	3 3/16"	7/8"	1	Yes	UL Recognized Component	000000000	00000	00000000	00000
125	125V AC/80V DC	2,500 A @ 125 V AC 2,700 A @ 80 V DC	3 3/16"	7/8"	1	Yes	UL Recognized Component	000000000	00000	00000000	00000
150	125V AC/80V DC	2,500 A @ 125 V AC 2,700 A @ 80 V DC	3 3/16"	7/8"	1	Yes	UL Recognized Component	000000000	00000	00000000	00000
175	125V AC/80V DC	2,500 A @ 125 V AC 2,700 A @ 80 V DC	3 3/16"	7/8"	1	Yes	UL Recognized Component	000000000	00000	00000000	00000
200	125V AC/80V DC	2,500 A @ 125 V AC 2,700 A @ 80 V DC	3 3/16"	7/8"	1	Yes	UL Recognized Component	000000000	00000	00000000	00000
225	125V AC/80V DC	2,500 A @ 125 V AC 2,700 A @ 80 V DC	3 3/16"	7/8"	1	Yes	UL Recognized Component	000000000	00000	00000000	00000
250	125V AC/80V DC	2,500 A @ 125 V AC 2,700 A @ 80 V DC	3 3/16"	7/8"	1	Yes	UL Recognized Component	000000000	00000	00000000	00000
300	125V AC/80V DC	2,500 A @ 125 V AC 2,700 A @ 80 V DC	3 3/16"	7/8"	1	Yes	UL Recognized Component	000000000	00000	00000000	00000
325	125V AC/80V DC	2,500 A @ 125 V AC 2,700 A @ 80 V DC	3 3/16"	7/8"	1	Yes	UL Recognized Component	000000000	00000	00000000	00000
350	125V AC/80V DC	2,500 A @ 125 V AC 2,700 A @ 80 V DC	3 3/16"	7/8"	1	Yes	UL Recognized Component	000000000	00000	00000000	00000
400	125V AC/80V DC	2,500 A @ 125 V AC 2,700 A @ 80 V DC	3 3/16"	7/8"	1	Yes	UL Recognized Component	000000000	00000	00000000	00000
500	125V AC/80V DC	2,500 A @ 125 V AC 2,700 A @ 80 V DC	3 3/16"	7/8"	1	Yes	__	000000000	00000	00000000	00000
600	125V AC/80V DC	2,500 A @ 125 V AC 2,700 A @ 80 V DC	3 3/16"	7/8"	1	Yes	__	000000000	00000	00000000	00000

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About Fuses

Fuses for Sensitive Electronics

Fast-Acting Lift Truck Fuses