OS250BS40FK
Product ID:74910
Updated: 2026/4/3
Key Features
- 1Ensure high reliability with self-cleaning, maintenance-free contacts for extreme conditions. 2、Meet British Standard B1-B3 compliance for guaranteed safe operation. 3、Simplify snap-on installation using adjustable feet for top or side mounting. 4、Prevent accidents with interlocking fuse covers that lock in the 'ON' position. 5、Choose versatile panel or DIN rail mounting for flexible integration.
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