Siemens low-voltage
Siemens catalog image for this reference; may represent the product family.
POWER CONTACTOR
3RT2045-1NB30 — Power contactor
SKU 3RT2045-1NB30power contactor, AC-3e/AC-3, 80 A, 37 kW / 400 V, 3-pole, 20-33 V AC/DC, 50/60 Hz, with integrated varistor, auxiliary contacts: 1 NO + 1 NC, screw terminal, size: S3
Active Product
80 ARated operational current (AC-3/AC-3e)
37 kW / 400 VMotor power / voltage
3Poles
PRODUCT DATA
Technical specifications
Source: Siemens product catalog.
Verified September 21, 2026.
| Product reference | 3RT2045-1NB30 |
|---|---|
| Manufacturer description | power contactor, AC-3e/AC-3, 80 A, 37 kW / 400 V, 3-pole, 20-33 V AC/DC, 50/60 Hz, with integrated varistor, auxiliary contacts: 1 NO + 1 NC, screw terminal, size: S3 |
| Net weight | 1,764 Kg |
| Packaging dimensions (L x W x H) | 168,00 x 78,00 x 162,00 mm |
| Rated operational current (AC-3/AC-3e) | 80 A |
| Motor power / voltage | 37 kW / 400 V |
| Poles | 3 |
| Auxiliary contacts | 1 NO + 1 NC |
| Size | S3 |
For complete electrical ratings, applicable standards, connection requirements and installation instructions, consult the official Siemens reference ↗.