The 1494G-EF3J6-421 is a pre-configured model within Allen-Bradley®'s 1494G series of heavy-duty industrial safety disconnect switches, specifically designed for 600V AC applications and integrating Class J fuse clips and an electrical interlock option.
Basic Switch Parameters、
Parameter Category Specification Value
Model 1494G-EF3J6-421 (200A switch + Class J fuse clips + electrical interlock option)
Rated Current 200 A
Rated Voltage 600V AC / 250V DC
Insulation Class UI (UL/IEC): 600V / 660V
Fuse Type Class J
Horsepower Ratings - 125 HP at 480V AC
- 150 HP at 600V AC
- 150 HP at 575V AC
Continuous Current 200 A @ 600V AC
Short-Circuit Withstand 200,000 A RMS symmetrical (when using Class J fuses)
Mechanical Life 10,000 operations (typical)
Switching Frequency ≤300 operations/hour
Enclosure Type Type 3R/4/12 (rainproof, dustproof, corrosion-resistant, painted metal enclosure)
Protection Rating IP20 (operating handle area)
Operating Handle Non-metallic handle, supporting locking of the OFF position with three padlocks
Electrical Interlock Option
Parameter Category Specification Value
Type Electrical interlock (early break)
Contact Configuration 2 normally open (N.O.) + 2 normally closed (N.C.)
Ratings - NEMA/EEMAC: 10 A @ 250V AC, 0.3 A @ 250V DC
- IEC: AC15, DC13 according to IEC/EN60947-5-1
Minimum Load 17V, 5 mA (standard contacts)
Function Interlock contacts open in advance of the main switch contacts, removing system voltage from electronic equipment to prevent damage from transient voltages