OS1250B04F

Name: OS1250B04F
Brand: ABB
SKU: OS1250B04F

"ABB OS1250B04F switch fuse provides reliable motor protection with world-class performance. Ideal for heavy industry applications, it offers robust insulation and high thermal current ratings."

Product ModelOS1250B04F

Material Number1SCA105257R1001

Product ID75843

Stock on Request

Last updated: 8/29/2026

Quantity

Key Features

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1. Reliability and Performance\"The ABB OS1250B04F switch fuse is engineered to deliver world-class performance in the most demanding industrial environments. Its robust design ensures reliable operation, making it an ideal choice for heavy industry applications.\"
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2. High Thermal Current Ratings\"With a high thermal current rating, the ABB OS1250B04F switch fuse can handle the most intense thermal loads, providing continuous protection to your motors without compromising efficiency.\"
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3. Robust Insulation\"Featuring robust insulation, the ABB OS1250B04F switch fuse offers superior dielectric strength, ensuring that it can withstand harsh industrial conditions and maintain its performance over time.\"
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4. Easy Installation\"Designed for ease of installation, the ABB OS1250B04F switch fuse can be easily integrated into your existing electrical infrastructure, minimizing downtime and ensuring a smooth transition to enhanced motor protection.\"

Technical Specifications

Detailed engineering parameters based on manufacturer documentation

Specifications may be subject to change without notice

Parameter

Value

Parameter

Value

Pollution Degree

Product Net Width

294 mm

Product Net Height

539 mm

Product Net Depth / Length

356 mm

Product Net Weight

36.5 kg

Conventional Free-air Thermal Current (Ith)

Î = 40 Â°C 1250 A

5. Compliance with Industry Standards\"Compliant with IEC 60947-3 standards, the ABB OS1250B04F switch fuse meets the highest industry standards for safety and performance, providing you with peace of mind and confidence in its operation.\"

Conventional Thermal Current (Ithe)

Fully Enclosed 1000 A

Fourth Pole Type

Switched - Fusible Pole

Fuse Size

Fuse System

British Standard

Handle Type

Handle and shaft not included

Mounting Type

Base mounting

Number of Poles

Operating Mode

Front Operated

Pollution Degree

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)

(690 V) 1250 A (690 V) 380415V;1250 A (690 V) 500V;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

04 (Left Side)

Terminal Type

Lug terminals

Terminal Width

50 mm

Tightening Torque

50 ... 75 NÂ·m

Tightening Torque

50 ... 75 NÂ·m

Object Classification Code

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

4. Large Equipment (Any External Dimension More Than 50 cm)

Manufacturer ID

1SCA105257R1001