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ABBFuse protector
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OS400J03K

Product ID:75634
Updated: 2026/4/3
ABB OS400J03K

Key Features

  • 1Handle heavy-duty applications with a 400 A amperage rating. 2、Enhance safety using dead front construction and terminal shrouds. 3、Simplify installation via surface mounting with lug terminals. 4、Ensure reliable operation with a 200 kA short circuit current rating. 5、Save panel space through a compact 230x255x176 mm design.
Product Details
OS400J03K
ABB

Technical Specifications

Detailed engineering parameters

ParameterValueParameterValue
Product Net Width
360 mm
Product Net Height
365 mm
Product Net Depth / Length
175 mm
Product Net Weight
6.55 kg
Fuse Size
400 A
Fuse System
Class J
Mounting Type
Base mounting
Number of Poles
3
Operating Mode
Front Operated
Power Loss
at Rated Operating Conditions per Pole 30 W
Rated Conditional Short-Circuit Current (Inc)
(690 V AC) 80 kA
Rated Current (In)
Main Circuit 400 A
Rated Impulse Withstand Voltage (Uimp)
Main Circuit 12 kV
Rated Operational Current AC-21A (Ie)
(380 ... 415 V) 400 A (500 V AC) 400 A (690 V AC) 400 A
Rated Operational Current AC-22A (Ie)
(380 ... 415 V) 400 A (500 V) 400 A (690 V) 400 A
Rated Operational Current AC-23A (Ie)
(380 ... 415 V) 400 A (500 V) 400 A (690 V) 400 A
Rated Operational Voltage
Main Circuit 600 V AC
Rated Short-time Withstand Current Low Voltage (Icw)
for 1 s 14 kA
Standards
UL98 IEC 60947-3
Terminal Type
Lug terminals
Tightening Torque
30 … 44 N·m
Maximum Operating Voltage UL/CSA
Main Circuit 600 V AC Main Circuit 250 V DC
Ampere Rating
400 A
Tightening Torque
30 … 44 N·m
Object Classification Code
Q
ETIM 8
EC001040 - Fuse switch disconnector
ETIM 9
EC001040 - Fuse switch disconnector
UNSPSC
39122233
IDEA Granular Category Code (IGCC)
5291 >> Fuse switch disconnector
eClass
V11.1 : 27371401
WEEE Category
5. Small Equipment (No External Dimension More Than 50 cm)
Manufacturer ID
1SCA117773R1001

Specifications may be subject to change without notice