250V DC Fuses | McMaster-Carr

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	Current Current

10A

12A

	Voltage Voltage	Show

250V DC

	Voltage Voltage	Hide

	Fuse Type Fuse Type

	Cartridge

	Overall Length Overall Length

	Overall Diameter Overall Diameter

	Manufacturer Equivalent Manufacturer Equivalent

	UL Class UL Class

RK5

RK1

	Protection Type Protection Type

Time Delay

Fast Acting

	Cartridge Fuse Style Cartridge Fuse Style

Ferrule

Knife Blade

	Blown Fuse Indicator Blown Fuse Indicator

Yes

	Breakthrough Current Breakthrough Current

	Number of Elements Number of Elements

	Specifications Met Specifications Met

CSA

	Rejection-Style End Rejection-Style End

Yes

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

	RoHS (Restriction of Hazardous Substances) RoHS (Restriction of Hazardous Substances)

RoHS Compliant

RoHS Compliant with
Exemptions

	CSA File Number CSA File Number

012636-0-000

053787_C_000

	UL File Number UL File Number

E4273

E2137

	Indicator Type Indicator Type

Dot

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About Fuses

These fuses can withstand the high inrush current caused by a motor starting. They provide comparable performance with a smaller footprint than standard size fuses. All have a rejection-style end that safeguards against replacement errors. Use them to protect power distribution branch circuits. Designed for use with Fuse Blocks for UL Class CC Fuses.

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						Each
Current, A	Voltage	Breakthrough Current	Lg.	Dia.	No. of Elements	Cartridge Fuse Style	Specifications Met		1-9	10-Up
Manufacturer Equivalent: ATD-R, CCMR, LP-CC
35	600V AC/250V DC	20,000 A @ 250 V DC 200,000 A @ 600 V AC	1 7/8"	27/32"	2	Ferrule	UL Listed	000000000	000000	000000
40	600V AC/250V DC	20,000 A @ 250 V DC 200,000 A @ 600 V AC	1 7/8"	27/32"	2	Ferrule	UL Listed	000000000	00000	00000
45	600V AC/250V DC	20,000 A @ 250 V DC 200,000 A @ 600 V AC	1 7/8"	27/32"	2	Ferrule	UL Listed	000000000	00000	00000
50	600V AC/250V DC	20,000 A @ 250 V DC 200,000 A @ 600 V AC	1 7/8"	27/32"	2	Ferrule	UL Listed	000000000	00000	00000
60	600V AC/250V DC	20,000 A @ 250 V DC 200,000 A @ 600 V AC	1 7/8"	27/32"	2	Ferrule	UL Listed	000000000	00000	00000

UL Class RK5 Fuses

Knife-Blade Style

Ferrule Style with Blown-Fuse Indicator

Knife-Blade Style with Blown-Fuse Indicator

Also known as dual-element fuses, these time-delay fuses withstand current overload for a short time so they won't open when exposed to harmless temporary surges, such as when starting a motor. They have a rejection-style end design that safeguards against replacement errors. Use with Fuse Blocks for UL Class RK5 Fuses.

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.

			Overall									Each
Current, A	Voltage	Breakthrough Current	Lg.	Dia.	No. of Elements	Cartridge Fuse Style	Blown Fuse Indicator	Specifications Met	UL File Number	CSA File Number		1-9	10-Up
Manufacturer Equivalent: FLN-R, FRN-R, TR-R
300	250V DC/250V AC	20,000 A @ 250 V DC 200,000 A @ 250 V AC	8 5/8"	2 3/8"	2	Knife Blade	No	UL Listed, CSA Certified	E4273	053787_C_000	00000000	0000000	0000000
400	250V DC/250V AC	20,000 A @ 250 V DC 200,000 A @ 250 V AC	8 5/8"	2 3/8"	2	Knife Blade	No	UL Listed, CSA Certified	E4273	053787_C_000	0000000	000000	000000
600	250V DC/250V AC	20,000 A @ 250 V DC 200,000 A @ 250 V AC	10 3/8"	2 7/8"	2	Knife Blade	No	UL Listed, CSA Certified	E4273	053787_C_000	00000000	000000	000000
Manufacturer Equivalent: FLN-R-ID, FRN-R-ID, TR-R-ID
35	250V DC/250V AC	20,000 A @ 250 V DC 200,000 A @ 250 V AC	3"	13/16"	2	Ferrule	Yes	UL Listed, CSA Certified	E2137	012636-0-000	00000000	00000	00000
40	250V DC/250V AC	20,000 A @ 250 V DC 200,000 A @ 250 V AC	3"	13/16"	2	Ferrule	Yes	UL Listed, CSA Certified	E2137	012636-0-000	00000000	00000	00000
45	250V DC/250V AC	20,000 A @ 250 V DC 200,000 A @ 250 V AC	3"	13/16"	2	Ferrule	Yes	UL Listed, CSA Certified	E2137	012636-0-000	00000000	00000	00000
50	250V DC/250V AC	20,000 A @ 250 V DC 200,000 A @ 250 V AC	3"	13/16"	2	Ferrule	Yes	UL Listed, CSA Certified	E2137	012636-0-000	00000000	00000	00000
60	250V DC/250V AC	20,000 A @ 250 V DC 200,000 A @ 250 V AC	3"	13/16"	2	Ferrule	Yes	UL Listed, CSA Certified	E2137	012636-0-000	00000000	00000	00000
70	250V DC/250V AC	20,000 A @ 250 V DC 200,000 A @ 250 V AC	5 7/8"	1 1/16"	2	Knife Blade	Yes	UL Listed, CSA Certified	E2137	012636-0-000	00000000	00000	00000
80	250V DC/250V AC	20,000 A @ 250 V DC 200,000 A @ 250 V AC	5 7/8"	1 1/16"	2	Knife Blade	Yes	UL Listed, CSA Certified	E2137	012636-0-000	00000000	00000	00000
90	250V DC/250V AC	20,000 A @ 250 V DC 200,000 A @ 250 V AC	5 7/8"	1 1/16"	2	Knife Blade	Yes	UL Listed, CSA Certified	E2137	012636-0-000	00000000	00000	00000
100	250V DC/250V AC	20,000 A @ 250 V DC 200,000 A @ 250 V AC	5 7/8"	1 1/16"	2	Knife Blade	Yes	UL Listed, CSA Certified	E2137	012636-0-000	00000000	00000	00000
125	250V DC/250V AC	20,000 A @ 250 V DC 200,000 A @ 250 V AC	7 1/8"	1 9/16"	2	Knife Blade	Yes	UL Listed, CSA Certified	E2137	012636-0-000	00000000	00000	00000
150	250V DC/250V AC	20,000 A @ 250 V DC 200,000 A @ 250 V AC	7 1/8"	1 9/16"	2	Knife Blade	Yes	UL Listed, CSA Certified	E2137	012636-0-000	00000000	00000	00000
200	250V DC/250V AC	20,000 A @ 250 V DC 200,000 A @ 250 V AC	7 1/8"	1 9/16"	2	Knife Blade	Yes	UL Listed, CSA Certified	E2137	012636-0-000	00000000	00000	00000

UL Class RK1 Time-Delay Fuses

Knife-Blade Style

Also known as dual-element fuses, these fuses withstand current overload for a short time so they won't open when exposed to harmless temporary surges, such as when starting a motor. They have a rejection-style end design that safeguards against replacement errors. Designed for use with Fuse Blocks for UL Class RK1 Fuses.

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.

			Overall						Each
Current, A	Voltage	Breakthrough Current	Lg.	Dia.	No. of Elements	Cartridge Fuse Style	Specifications Met		1-9	10-Up
Manufacturer Equivalent: A2D-R, LLN-RK, LPN-RK
100	250V DC/250V AC	100,000 A @ 250 V DC 300,000 A @ 250 V AC	5 7/8"	1 3/16"	2	Knife Blade	UL Listed, CSA Certified	00000000	000000	000000
125	250V DC/250V AC	100,000 A @ 250 V DC 300,000 A @ 250 V AC	7 1/8"	1 11/16"	2	Knife Blade	UL Listed, CSA Certified	000000000	000000	00000
200	250V DC/250V AC	100,000 A @ 250 V DC 300,000 A @ 250 V AC	7 1/8"	1 11/16"	2	Knife Blade	UL Listed, CSA Certified	00000000	000000	00000
400	250V DC/250V AC	100,000 A @ 250 V DC 300,000 A @ 250 V AC	8 5/8"	2 3/8"	2	Knife Blade	UL Listed, CSA Certified	00000000	000000	000000

UL Class RK1 Fast-Acting Fuses

Ferrule Style

These fuses open circuits quickly when surges are detected. They have a rejection-style end design that safeguards against replacement errors. Use with Fuse Blocks for UL Class RK1 Fuses.

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						Each
Current, A	Voltage	Breakthrough Current	Lg.	Dia.	No. of Elements	Cartridge Fuse Style	Specifications Met		1-9	10-Up
Manufacturer Equivalent: A6K-R, KLS-R, KTS-R
1	600V AC/250V DC	20,000 A @ 250 V DC 200,000 A @ 600 V AC	5"	13/16"	1	Ferrule	UL Listed, CSA Certified	00000000	000000	000000
2	600V AC/250V DC	20,000 A @ 250 V DC 200,000 A @ 600 V AC	5"	13/16"	1	Ferrule	UL Listed, CSA Certified	00000000	00000	00000
3	600V AC/250V DC	20,000 A @ 250 V DC 200,000 A @ 600 V AC	5"	13/16"	1	Ferrule	UL Listed, CSA Certified	00000000	00000	00000
4	600V AC/250V DC	20,000 A @ 250 V DC 200,000 A @ 600 V AC	5"	13/16"	1	Ferrule	UL Listed, CSA Certified	00000000	00000	00000
5	600V AC/250V DC	20,000 A @ 250 V DC 200,000 A @ 600 V AC	5"	13/16"	1	Ferrule	UL Listed, CSA Certified	00000000	00000	00000
6	600V AC/250V DC	20,000 A @ 250 V DC 200,000 A @ 600 V AC	5"	13/16"	1	Ferrule	UL Listed, CSA Certified	00000000	00000	00000
8	600V AC/250V DC	20,000 A @ 250 V DC 200,000 A @ 600 V AC	5"	13/16"	1	Ferrule	UL Listed, CSA Certified	00000000	00000	00000
10	600V AC/250V DC	20,000 A @ 250 V DC 200,000 A @ 600 V AC	5"	13/16"	1	Ferrule	UL Listed, CSA Certified	00000000	00000	00000
12	600V AC/250V DC	20,000 A @ 250 V DC 200,000 A @ 600 V AC	5"	13/16"	1	Ferrule	UL Listed, CSA Certified	00000000	00000	00000
15	600V AC/250V DC	20,000 A @ 250 V DC 200,000 A @ 600 V AC	5"	13/16"	1	Ferrule	UL Listed, CSA Certified	00000000	00000	00000
20	600V AC/250V DC	20,000 A @ 250 V DC 200,000 A @ 600 V AC	5"	13/16"	1	Ferrule	UL Listed, CSA Certified	00000000	00000	00000
25	600V AC/250V DC	20,000 A @ 250 V DC 200,000 A @ 600 V AC	5"	13/16"	1	Ferrule	UL Listed, CSA Certified	00000000	00000	00000
30	600V AC/250V DC	20,000 A @ 250 V DC 200,000 A @ 600 V AC	5"	13/16"	1	Ferrule	UL Listed, CSA Certified	00000000	00000	00000

UL Class K5 Fuses

Ferrule Style

Knife-Blade Style

Use these fast-acting fuses in applications where temporary overload current is not present, such as in lighting and heating. They open circuits quickly when surges are detected. Use with Fuse Blocks for UL Class K5 Fuses.

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						Each
Current, A	Voltage	Breakthrough Current	Lg.	Dia.	No. of Elements	Cartridge Fuse Style	Specifications Met		1-9	10-Up
Manufacturer Equivalent: NLN, NON, OT
3	250V AC/250V DC	20,000 A @ 250 V DC 50,000 A @ 250 V AC	2"	9/16"	1	Ferrule	UL Listed, CSA Certified	00000000	00000	00000
5	250V AC/250V DC	20,000 A @ 250 V DC 50,000 A @ 250 V AC	2"	9/16"	1	Ferrule	UL Listed, CSA Certified	00000000	0000	0000
6	250V AC/250V DC	20,000 A @ 250 V DC 50,000 A @ 250 V AC	2"	9/16"	1	Ferrule	UL Listed, CSA Certified	00000000	0000	0000
10	250V AC/250V DC	20,000 A @ 250 V DC 50,000 A @ 250 V AC	2"	9/16"	1	Ferrule	UL Listed, CSA Certified	00000000	0000	0000
15	250V AC/250V DC	20,000 A @ 250 V DC 50,000 A @ 250 V AC	2"	9/16"	1	Ferrule	UL Listed, CSA Certified	00000000	0000	0000
20	250V AC/250V DC	20,000 A @ 250 V DC 50,000 A @ 250 V AC	2"	9/16"	1	Ferrule	UL Listed, CSA Certified	00000000	0000	0000
30	250V AC/250V DC	20,000 A @ 250 V DC 50,000 A @ 250 V AC	2"	9/16"	1	Ferrule	UL Listed, CSA Certified	00000000	0000	0000
35	250V AC/250V DC	20,000 A @ 250 V DC 50,000 A @ 250 V AC	3"	13/16"	1	Ferrule	UL Listed, CSA Certified	00000000	0000	0000
40	250V AC/250V DC	20,000 A @ 250 V DC 50,000 A @ 250 V AC	3"	13/16"	1	Ferrule	UL Listed, CSA Certified	00000000	0000	0000
50	250V AC/250V DC	20,000 A @ 250 V DC 50,000 A @ 250 V AC	3"	13/16"	1	Ferrule	UL Listed, CSA Certified	00000000	0000	0000
60	250V AC/250V DC	20,000 A @ 250 V DC 50,000 A @ 250 V AC	3"	13/16"	1	Ferrule	UL Listed, CSA Certified	00000000	0000	0000
70	250V AC/250V DC	20,000 A @ 250 V DC 50,000 A @ 250 V AC	5 7/8"	1 1/16"	1	Knife Blade	UL Listed, CSA Certified	00000000	00000	00000
80	250V AC/250V DC	20,000 A @ 250 V DC 50,000 A @ 250 V AC	5 7/8"	1 1/16"	1	Knife Blade	UL Listed, CSA Certified	00000000	00000	00000
100	250V AC/250V DC	20,000 A @ 250 V DC 50,000 A @ 250 V AC	5 7/8"	1 1/16"	1	Knife Blade	UL Listed, CSA Certified	00000000	00000	00000
200	250V AC/250V DC	20,000 A @ 250 V DC 50,000 A @ 250 V AC	7 1/8"	1 9/16"	1	Knife Blade	UL Listed, CSA Certified	00000000	00000	00000

About Fuses

UL Class CC Time-Delay Midget Fuses for Motors

UL Class RK5 Fuses

UL Class RK1 Time-Delay Fuses

UL Class RK1 Fast-Acting Fuses

UL Class K5 Fuses