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ABBFuse protector
Product Model

OS400B12LR

Manufacturer

ABB

Category

Fuse protector

Product ID

77431

In Stock
Last updated: 2025/4/18
View Specifications
ABB OS400B12LR

Selling Points

  • 1High protection and reliability for demanding industrial applications.
  • 2Compact design for easy installation in smaller enclosures.
  • 3Modular structure allows flexible pole placement and adjustable shaft for various installation depths.
  • 4Self-cleaning contacts ensure long, maintenance-free electrical life.
  • 5Interlocking fuse covers ensure safety by preventing opening while the switch is in the "ON" position.
Product Details
OS400B12LR
ABB

Technical Specifications

Detailed engineering parameters based on manufacturer documentation

ParameterValueParameterValue
Pollution Degree
3
Product Net Width
344 mm
Product Net Height
150 mm
Product Net Depth / Length
255 mm
Product Net Weight
9.6 kg
Conventional Free-air Thermal Current (Ith)
Θ = 40 °C 400 A
Conventional Thermal Current (Ithe)
Fully Enclosed 630 A
Fuse Size
B1-B4
Fuse System
British Standard
Handle Type
Handle and shaft not included
Mounting Type
Base mounting
Number of Poles
3
Operating Mode
Front Operated
Pollution Degree
3
Position of Line Terminals
Left In - Right Out
Power Loss
at Rated Operating Conditions per Pole 40 W
Rated Conditional Short-Circuit Current (Inc)
(690 V) 80 kA
Rated Current (In)
Main Circuit 400 A
Rated Impulse Withstand Voltage (Uimp)
12 kV
Rated Insulation Voltage (Ui)
1000 V
Rated Operational Current AC-21A (Ie)
(500 V) 400 A (690 V) 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 Power AC-23A (Pe)
(220 ... 240 V) 132 kW (400 V) 220 kW (415 V) 230 kW (500 V) 280 kW (690 V) 400 kW
Rated Operational Voltage
Main Circuit 690 V AC
Rated Short-time Withstand Current Low Voltage (Icw)
for 1 s 14 kiloampere rms
Standards
IEC 60947-3
Switches Operating Mechanism
12 (Between the Poles)
Terminal Type
Lug terminals
Terminal Width
25 mm
Tightening Torque
30 ... 44 N·m
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
1SCA022855R1230

Specifications may be subject to change without notice