OS1250DA21P
Product ID:75588
Updated: 2026/4/3
Key Features
- 1Secure reliable 3-pole protection for DIN rail applications. 2、Operate easily with the included handle and shaft mechanism. 3、Guard electrical systems against short circuits and overcurrents. 4、Integrate seamlessly into HVAC chiller and other critical systems. 5、Source from ABB's trusted manual switch fuse product line.
Technical Specifications
Detailed engineering parameters
| Parameter | Value | Parameter | Value |
|---|---|---|---|
| Pollution Degree | 3 | Product Net Width | 432 mm |
| Product Net Height | 356 mm | Product Net Depth / Length | 294 mm |
| Product Net Weight | 27.98 kg 61.69 lb | Cable Cross-Section | 2.5 ... 25 mm² |
| Conventional Free-air Thermal Current (Ith) | Π= 40 °C 1250 A | Conventional Thermal Current (Ithe) | Fully Enclosed 1000 A |
| Fuse Size | NH4a | Fuse System | DIN |
| Handle Type | Handle and shaft included | 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 | 21 (Between the Poles) |
| 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 | 1SCA109337R1001 |
Specifications may be subject to change without notice