Fusible Safety Switches
Ratings for Fuses
| Class | Cartridge fuse | Ampere Rating |
|---|---|---|
| Light Duty Safety Switches | ||
|
Plug |
10 kA short circuit |
30 |
|
Light and General Duty Safety Switches from the factory cartridge fuses |
||
|
H |
10 kA short circuit |
30 to 600 |
|
K |
10 kA short circuit |
30 to 600 |
|
R |
10 kA short circuit |
30 to 600 |
|
100 kA short circuit * |
30 to 600 |
|
|
T |
100 kA short circuit |
800 |
|
400 and 600 * |
||
|
Heavy Duty Safety Switches from the factory cartridge fuses |
||
|
H |
10 kA short circuit |
30 to 600 |
|
K |
10 kA short circuit |
30 to 600 |
|
R |
10 kA short circuit |
30 to 600 |
|
200 kA short circuit * |
30 to 600 |
|
|
L |
200 kA short circuit |
800 to 1200 |
|
Safety Switches Field Modified |
||
|
General Duty |
||
|
J |
100 kA short circuit |
30 to 600 |
|
Heavy Duty |
||
|
J |
200 kA Short Circuit |
100 to 200 * |
|
30 to 400* |
||
UL Class Ratings for Fuses
|
Class |
Voltage |
Maximum Interruption Rating |
|---|---|---|
| Current limiting fuses | ||
|
R |
250 Vac |
200,000 A rms symmetrical |
|
600 Vac |
||
|
300 Vdc |
||
|
600 Vdc |
||
|
Terminals modified to provide rejection feature |
||
|
J |
600 Vac |
200,000 A rms symmetrical |
|
T |
300 Vac |
200,000 A rms symmetrical |
|
600 Vac |
200,000 A rms symmetrical |
|
|
125 Vdc |
200,000 A rms symmetrical |
|
|
300 Vdc |
200,000 A rms symmetrical |
|
|
L |
600 Vac |
ac: 200,000 A rms symmetrical |
|
dc: 50,000 A |
||
|
600 Vdc |
dc: 100,000 A |
|
|
dc: 200,000 A |
||
|
K |
250 Vac |
50,000 A rms symmetrical |
|
600 Vac |
100,000 A rms symmetrical |
|
|
200,000 A rms symmetrical |
||
|
Non-Current Limiting Fuses |
||
|
H |
250 Vac |
10,000 A rms symmetrical |
|
600 Vac |
||
|
Plug |
125 Vac |
10,000 A rms symmetrical |