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ABBFuse protector
Product Model

OS1250B03K

Manufacturer

ABB

Category

Fuse protector

Product ID

75265

In Stock
Last updated: 2025/5/1
View Specifications
ABB OS1250B03K

Selling Points

  • 1High Protection and Reliability: Ensures safe operation with rapid fault clearance and maintains protection level even after faults occur.
  • 2Compact Design: Allows for installation in smaller enclosures, saving space and reducing installation time.
  • 3Wide Operational Range: Rated for AC-20 and DC-20 up to 1000 V, suitable for various electrical systems.
  • 4Versatile Installation Options: Modular structure with adjustable shaft for different installation depths and configurations.
  • 5High Thermal Performance: Rated thermal current in ambient 35°C and temporarily 40°C, ensuring reliable operation under various conditions.
Product Details
OS1250B03K
ABB

Technical Specifications

Detailed engineering parameters based on manufacturer documentation

ParameterValueParameterValue
Pollution Degree
3
Product Net Width
429 mm
Product Net Height
356 mm
Product Net Depth / Length
294 mm
Product Net Weight
45 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
Direct mounted handle
Mounting Type
Base mounting
Number of Poles
3
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
03 (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
1SCA108715R1001

Specifications may be subject to change without notice