UL Listed Maximum Short Circuit Current Ratings—AC only

Class 3110

UL Listed Maximum Short Circuit Current Ratings—AC only

note

Consult the wiring diagram of the switch to verify the UL Listed short circuit current rating.

Fusible Safety Switches

Heavy Duty
Safety Switch Type

UL Listed
Fuse Class

UL Listed Short Circuit
Current Ratings

Fusible

H, K

10 kA

R, J, L

200 kA [1]

Non-Fusible Safety Switches

Systems equal or less than 10 kAIR SCCR —Any brand of circuit breaker or fuse not exceeding the ampere rating of the switch may be used in conjunction with a non-fusible safety switch.

Systems above 10 kAIR SCCR—The UL Listed short circuit current rating for Square D non-fusible switches is based upon the switch being used in conjunction with fuses or Square D circuit breakers or Mag-Gard motor circuit protectors.

Non-Fusible Safety Switches [2] [3]

Switch Rating
(A)

Fuse or Circuit Breaker Type [4]

3-Phase

250 Vdc /
600 Vdc

240 Vac

480 Vac

600 Vac

With Upstream Fuse Protection

All

H, K

10 kA

10 kA

10 kA

Up to 10 kA

R,T,J,L

200 kA

200 kA

200 kA

With Upstream Circuit Breaker Protection

All

Any brand circuit breaker

10 kA

10 kA

10 kA

 

30–100

HD

25 kA

18 kA

14 kA

Up to 10 kA

30–100

HG

65 kA

35 kA

18 kA

30–100

HJ

65 kA

35 kA

25 kA

30–100

HL

65 kA

35 kA

35 kA

30–100

HR

65 kA

35 kA

35 kA

30–100

FA

14 kA

14 kA

14 kA

30–100

FH

18 kA

18 kA

18 kA

200

HD, JD

25 kA

18 kA

14 kA

200

HG, JG

65 kA

35 kA

18 kA

200

HJ, JJ

65 kA

35 kA

25 kA

200

HL, JL

65 kA

35 kA

35 kA

200

HR, JR

65 kA

35 kA

35 kA

400

LA

22 kA

22 kA

22 kA

400

LH

25 kA

25 kA

25 kA

400–600

LD

25 kA

18 kA

14 kA

400–600

LG

65 kA

35 kA

18 kA

400–600

LJ

100 kA

65 kA

25 kA

400–600

LL

100 kA

65 kA

50 kA

400–600

LR

100 kA

65 kA

65 kA

4-Pole and 6-Pole NOT SUITABLE FOR SERVICE ENTRANCE

Amp

Fusable

Class R

NonFusible

Line Side

Horsepower Ratings Max (Dual Element Time-Delay Fuses)

Fuse Kits

Barriers [5]

240 V

480 V

600 V

250 Vdc

600 Vdc

4-Wire (4 Blade) – 600 Vac 600 Vdc Type 12

30

H461AWK

RFK03L

Factory Included

10

10

20

20

25

30

10

15

30

HU461AWK (Series F6)

Factory Included

10

10

20

20

25

30

5

15

60

H462AWK

RFK03H

HU462AWK

Factory Included

20

20

40

50

50

60

10

30

100

H463AWK

RFK10

HU463AWK

Factory Included

30

40

50

75

50

75

20

30

200

H464AWK

HRK1020

HU464AWK

Factory Included

50

60

50

125

50

150

40

50

400

H465AWK

HRK4060

HU465AWK

Qty. (2): LSBG602

125

250

350

50

50

4-Wire (4 Blade) – 600 Vac 600 Vdc Type 4X

30

H461DS

RFK03L

HU461DS

Factory Included

10

10

20

20

25

30

10

15

60

H462DS

RFK03H

HU462DS

Factory Included

20

20

40

50

50

60

10

30

100

H463DS

RFK10

HU463DS

Factory Included

30

40

50

75

50

75

20

30

200

H464DS

HRK1020

HU464DS

Factory Included

50

60

50

125

50

150

40

50

400

H465DS

HRK4060

HU465DS

Qty. (2): LSBG602

125

250

350

50

50

6-Wire (6 Blade) – 600 Vac 600 Vdc Type 12

30

HU661AWK

Factory Included

10

20

30

60

HU662AWK

Factory Included

20

50

60

100

H663AWK

RFK10

HU663AWK

Factory Included

50

75

75

200

H664AWK

HRK1020

HU664AWK

Factory Included

60

125

150

6-Wire (6 Blade) – 600 Vac 600 Vdc Type 4X

30

HU661DS

Factory Included

10

20

30

60

HU662DS

Factory Included

20

50

60

100

H663DS

RFK10

HU663DS

Factory Included

50

75

75

200

H664DS

HRK1020

HU664DS

Factory Included

60

125

150

Footnotes

  1. On 600 V, 200 A switches, 100,000 A max. on corner grounded delta when using Class J or R fuses.
  2. For NEMA Type 4X Fiberglass Reinforced Polyester switches, see Fiberglass Reinforced Polyester Enclosures—NEMA 4X.
  3. NEMA Type 7/9 SCCR 10 kAIR 600 Vac maximum.
  4. Ampere rating of fuse or circuit breaker not to exceed switch ampere rating.
  5. Factory Included to protect against inadvertent contact with live parts per UL 869A and NEC service entrance barrier requirements.

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