SIEMENS
Siemens Auxiliary Contactor 3TH4040-0AB0 24V Ac
Part No.
3TH4040-0AB0
Stock Code
15019901268268
Procurement Intelligence
The Siemens 3TH40 series auxiliary contactor is a compact switching device designed for control circuits in industrial switchgear and motor control panels, typically used to enhance switching logic and signal processing. Critical verification: confirm 24V AC coil voltage matches your control circuit specification and validate mechanical interlock compatibility with main contactors.
Control circuit switching logic
Before ordering — verify:
| ☐ | Coil voltage compatibility |
| ☐ | Contact configuration (NO/NC) |
| ☐ | Mounting space constraints |