3NP1123-1CA20 Siemens SENTRON 3NP1 Fuse Switch Disconnector, 3-Pole, NH000, 160 A
The Siemens 3NP1123-1CA20 is a SENTRON 3NP1 fuse switch disconnector for size NH000 LV HRC fuses, rated 160 A and up to 690 V AC / 440 V DC. This 3-pole version is designed for mounting-plate installation, with box terminals and a 45 mm cover level. It combines load switching, isolation and fuse protection in one compact device, and is suitable as a switch disconnector, safety switch and maintenance/repair switch in distribution boards, control panels and machine power feeds.
3NP1123-1CA20 Technical Data
| Specification | Value (Siemens) |
|---|---|
| Product | SENTRON 3NP1 fuse switch disconnector |
| Poles | 3 |
| Fuse system / size | LV HRC (NH) fuse, NH000 |
| Rated operational current (at 35 °C) | 160 A |
| Continuous current at 40 / 45 / 50 / 55 °C | 150 / 140 / 130 / 120 A |
| Rated operational voltage | 690 V AC / 440 V DC |
| Rated insulation voltage | 690 V (pollution degree 3); 1,000 V (pollution degree 2) |
| Rated impulse withstand voltage | 8 kV |
| AC-23 B at 400 V | 160 A |
| AC-22 B at 400 V | 160 A |
| AC-21 B at 690 V | 160 A |
| DC-21 B at 440 V | 100 A |
| Rated conditional short-circuit current | 80 kA (50 kA at 690 V) |
| Max. let-through current (closed switch) | 15 kA |
| I²t max. at 400 / 500 V | 166,000 / 223,000 A²·s |
| Power loss (without fuse) | 5 W per pole / 15 W per device |
| Operating mechanism | Cover handle |
| Cover level | 45 mm |
| Degree of protection | IP40 closed with cover; IP30 without cover; IP20 open |
| Mechanical endurance | 2,000 switching cycles (typical) |
| Connection | Box terminals, 1.5–50 mm² (stranded); 1.5–35 mm² (finely stranded with end sleeve); laminated conductor max. 8 x 8 mm |
| Tightening torque | 3.5–4 N·m |
| Mounting | Mounting plate, horizontal or vertical |
| Dimensions (W x H x D) | 88.8 x 141.7 x 74.1 mm |
| Net weight | 0.47 kg |
| Operating temperature | -25 to +55 °C |
Suitability
| Function | Suitable |
|---|---|
| Switch disconnector | Yes |
| Safety switch | Yes |
| Maintenance / repair switch | Yes |
| Main switch | No |
| EMERGENCY-OFF switch | No |
Key Features of the SENTRON 3NP1
- Switching under load: AC-23 B utilisation category at 400 V, suitable for switching motor loads
- High short-circuit strength: rated conditional short-circuit current of 80 kA
- Safe operation: interlocked and sealable, with optional locking capability
- Expandable: auxiliary switch and optional electronic fuse monitoring, phase failure monitoring and overvoltage protection monitoring
- Flexible wiring: box terminals for cables up to 50 mm² or laminated busbars up to 8 x 8 mm
- Compact design: only 88.8 mm wide, mountable horizontally or vertically
SENTRON 3NP1 Range
Siemens offers SENTRON 3NP1 fuse switch disconnectors in 1-, 3- and 4-pole versions from 125 A to 630 A, with protection up to IP40. Built-in reach-round and touch protection prevents contact with live parts when mounting on busbar systems.
Buy the 3NP1123-1CA20 Siemens from Atlantech Drives
Atlantech Drives supplies genuine Siemens SENTRON low-voltage power distribution products to panel builders, contractors and maintenance teams worldwide, with fast shipping. Contact our commercial team for stock, volume pricing and lead times on the 3NP1123-1CA20. Request your quote today.
