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ABBFuse protector
Product Model

OS1250B02

Manufacturer

ABB

Category

Fuse protector

Product ID

75290

In Stock
Last updated: 2025/4/18
View Specifications
ABB OS1250B02

Selling Points

  • 1Designed for extreme conditions, ensuring long, reliable electrical life.
  • 2Modular design with adjustable shaft and snap-on accessories for quick and cost-efficient installation.
  • 3Interlocking fuse covers prevent opening while the switch is in “ON” position, reducing the risk of electric shock.
  • 4Available in various pole configurations (3 or 4 poles) with different operating mechanism placements.
  • 5Self-cleaning contacts and maintenance-free operation make it an optimal solution for motor protection in heavy industry.
Product Details
OS1250B02
ABB

Technical Specifications

Detailed engineering parameters based on manufacturer documentation

ParameterValueParameterValue
Pollution Degree
3
Product Net Width
294 mm
Product Net Height
319 mm
Product Net Depth / Length
356 mm
Product Net Weight
19.8 kg
Cable Cross-Section
2.5 ... 25 mm²
Conventional Free-air Thermal Current (Ith)
Θ = 40 °C 1250 A
Conventional Thermal Current (Ithe)
Fully Enclosed 1000 A
Fuse Size
D1
Fuse System
British Standard
Handle Type
Handle and shaft not included
Mounting Type
Base mounting
Number of Poles
2
Operating Mode
Front Operated
Pollution Degree
3
Position of Line Terminals
Top In - Bottom Out Bottom In - Top Out
Power Loss
at Rated Operating Conditions per Pole 75 W
Rated Conditional Short-Circuit Current (Inc)
(690 V) 80 kA
Rated Current (In)
Main Circuit 1250 A
Rated Impulse Withstand Voltage (Uimp)
12 kV
Rated Insulation Voltage (Ui)
1000 V
Rated Operational Current AC-21A (Ie)
(380 ... 415 V) 1250 A (500 V) 1250 A (690 V) 1250 A
Rated Operational Current AC-21B (Ie)
(500 V) 1250 A (690 V) 1250 A
Rated Operational Current AC-22A (Ie)
(380 ... 415 V) 1250 A
Rated Operational Current AC-22B (Ie)
(500 V) 1250 A (690 V) 1250 A
Rated Operational Current AC-23A (Ie)
(380 ... 415 V) 1000 A
Rated Operational Current AC-23B (Ie)
(500 V) 1000 A (690 V) 1000 A
Rated Operational Power AC-23A (Pe)
(220 ... 240 V) 315 kW (400 V) 560 kW (415 V) 560 kW (500 V) 710 kW (690 V) 1000 kW
Rated Operational Voltage
Main Circuit 690 V AC
Rated Short-time Withstand Current Low Voltage (Icw)
for 1 s 40 kiloampere rms
Standards
IEC 60947-3
Switches Operating Mechanism
02 (Left Side)
Terminal Type
Lug terminals
Terminal Width
50 mm
Tightening Torque
50 ... 75 N·m
Tightening Torque
50 ... 75 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
1SCA114069R1001

Specifications may be subject to change without notice