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ABBFuse protector
Product Model

OS250D12BB

Manufacturer

ABB

Category

Fuse protector

Product ID

74938

In Stock
Last updated: 2025/4/20
View Specifications
ABB OS250D12BB

Selling Points

  • 1Padlockable handle for secure operation in the off-position.
  • 2Adjustable shaft for versatile installation depths.
  • 3High insulation voltage (1000 V) for reliable performance.
  • 4Front-operated mechanism with I-O and ON-OFF indication (IP65).
  • 5Includes a black handle with IP65 rating and shaft and terminal bolt kits as standard.
Product Details
OS250D12BB
ABB

Technical Specifications

Detailed engineering parameters based on manufacturer documentation

ParameterValueParameterValue
Pollution Degree
3
Product Net Width
206 mm
Product Net Height
193 mm
Product Net Depth / Length
189 mm
Product Net Weight
3.03 kg 6.68 lb
Conventional Free-air Thermal Current (Ith)
Θ = 40 °C 250 A
Conventional Thermal Current (Ithe)
Fully Enclosed 250 A
Fuse Size
NH0 NH1
Fuse System
DIN
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
Back In - Back Out
Power Loss
at Rated Operating Conditions per Pole 13 W
Rated Conditional Short-Circuit Current (Inc)
(690 V) 80 kA
Rated Current (In)
Main Circuit 250 A
Rated Impulse Withstand Voltage (Uimp)
12 kV
Rated Insulation Voltage (Ui)
1000 V
Rated Operational Current AC-21A (Ie)
(500 V) 250 A (690 V) 250 A
Rated Operational Current AC-22A (Ie)
(380 ... 415 V) 250 A (500 V) 250 A (690 V) 250 A
Rated Operational Current AC-23A (Ie)
(380 ... 415 V) 250 A (500 V) 250 A (690 V) 250 A
Rated Operational Power AC-23A (Pe)
(220 ... 240 V) 75 kW (400 V) 140 kW (415 V) 145 kW (500 V) 170 kW (690 V) 250 kW
Rated Operational Voltage
Main Circuit 690 V AC
Rated Short-time Withstand Current Low Voltage (Icw)
for 1 s 8 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
1SCA102202R1001

Specifications may be subject to change without notice