Siemens low-voltage
Siemens catalog image for this reference; may represent the product family.
POWER CONTACTOR
3RT2028-2BB40 — Power contactor
SKU 3RT2028-2BB40power contactor, AC-3e/AC-3, 38 A, 18.5 kW / 400 V, 3-pole, 24 V DC, auxiliary contacts: 1 NO + 1 NC, spring-loaded terminal, size: S0
Active Product
38 ARated operational current (AC-3/AC-3e)
18.5 kW / 400 VMotor power / voltage
3Poles
PRODUCT DATA
Technical specifications
Source: Siemens product catalog.
Verified September 21, 2026.
| Product reference | 3RT2028-2BB40 |
|---|---|
| Manufacturer description | power contactor, AC-3e/AC-3, 38 A, 18.5 kW / 400 V, 3-pole, 24 V DC, auxiliary contacts: 1 NO + 1 NC, spring-loaded terminal, size: S0 |
| Net weight | 0,61798 Kg |
| Packaging dimensions (L x W x H) | 108,5 x 54,00 x 115,5 mm |
| Rated operational current (AC-3/AC-3e) | 38 A |
| Motor power / voltage | 18.5 kW / 400 V |
| Poles | 3 |
| Auxiliary contacts | 1 NO + 1 NC |
| Size | S0 |
For complete electrical ratings, applicable standards, connection requirements and installation instructions, consult the official Siemens reference ↗.