OS250BS40FK
Product ID:74910
Updated: 2026/7/14
Key Features
- 1Ensure high reliability with self-cleaning, maintenance-free contacts for extreme conditions.
- 2Meet British Standard B1-B3 compliance for guaranteed safe operation.
- 3Simplify snap-on installation using adjustable feet for top or side mounting.
- 4Prevent accidents with interlocking fuse covers that lock in the 'ON' position.
- 5Choose versatile panel or DIN rail mounting for flexible integration.
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Technical Specifications
Detailed engineering parameters
| Parameter | Value | Parameter | Value |
|---|---|---|---|
| Pollution Degree | 3 | Product Net Width | 294 mm |
| Product Net Height | 199 mm | Product Net Depth / Length | 154 mm |
| Product Net Weight | 4.8 kg 10.6 lb | Conventional Free-air Thermal Current (Ith) | Π= 40 °C 250 A |
| Conventional Thermal Current (Ithe) | Fully Enclosed 250 A | Fourth Pole Type | Switched - Fusible Pole |
| Fuse Size | B1-B3 | Fuse System | British Standard |
| Handle Type | Direct mounted handle included | Mounting Type | Base mounting |
| Number of Poles | 4 | Operating Mode | Side Operated |
| Pollution Degree | 3 | Position of Line Terminals | Top In - Bottom Out, Bottom In - Top 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 | 40 (Right Side) | 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 | 1SCA022870R8820 |
Specifications may be subject to change without notice
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