Siemens 3RT20241AN24 Contactor — S0 Frame, 12 A, 220 VAC Coil
Part identity and family context
The 3RT20241AN24 belongs to the Siemens SIRIUS 3RT2 contactor series, specifically the S0 size frame with a 12 A main contact rating and a 220 VAC control coil. The "AN24" suffix in the MPN encodes the coil voltage class (220 VAC) and the contact arrangement (two normally open + two normally closed auxiliary contacts).
Key specifications
- Base product number: 3RT2024
- Main contact rating: 12 A
- Contact form: 3PST-NO (three normally open power poles)
- Auxiliary contacts: 2 NO + 2 NC (integrated)
- Coil voltage: 220 VAC
- Must operate voltage: 187 VAC
- Coil power consumption: 67 VA (inrush)
- Operate time: 40 ms
- Operating temperature range: 25°C to 60°C
- Mounting: Chassis mount / DIN Rail
- Encapsulation: Box
In-catalog comparison with similar parts
All parts below share the same base product number (3RT2024) and belong to the same SIRIUS S0 contactor family. These rows represent parametric similarity only — pairwise substitution requires the reader's own engineering qualification.
| Parameter | 3RT20241AN24 (primary) | 3RT20241AN20 | 3RT20241AN60 | 3RT20241AC24 | 3RT20241AL24 |
|---|---|---|---|---|---|
| Coil voltage | 220 VAC | 220 VAC | 200 VAC | 24 VAC | 230 VAC |
| Must operate | 187 VAC | 187 VAC | — | 20.4 VAC | 195.5 VAC |
| Auxiliary config | 2NO+2NC | 1NO+1NC | 1NO+1NC | 2NO+2NC | 2NO+2NC |
| Operate time | 40 ms | 38 ms | 40 ms | 40 ms | 40 ms |
| Encapsulation | Box | Bulk | Box | Box | Box |
| Similarity | — | 1.0 | 1.0 | 0.96 | 0.96 |
Why these parts are parametrically similar
- 3RT20241AN20 — identical 220 VAC coil and S0 frame; differs only in auxiliary contact count (1NO/1NC instead of 2NO/2NC) and packaging (Bulk vs Box).
- 3RT20241AN60 — same S0/3RT2024 base with 220 VAC coil designation, but rated for 200 VAC nominal coil voltage and ships in Bulk packaging with marginally faster operate time (38 ms).
- 3RT20241AC24 — matches the primary on auxiliary configuration, frame size, and coil power; the 24 VAC coil makes it suitable for lower-voltage control systems (must operate 20.4 VAC).
Selection notes
The choice between the primary unit and its catalog peers hinges on coil voltage match to the existing control circuit, auxiliary contact count needed for the control scheme, and whether box or bulk packaging suits the installation. The 3RT20241AN24 provides the highest auxiliary contact density (2NO+2NC) among the most closely matched 220 VAC variants, which can simplify wiring in schemes requiring both normally open and normally closed feedback signals.
FAQ
What is the coil voltage of the 3RT20241AN24? The coil is rated for 220 VAC, with a must-operate threshold of 187 VAC.
How many auxiliary contacts does the 3RT20241AN24 include? It integrates two normally open (NO) and two normally closed (NC) auxiliary contacts.
What mounting options does the 3RT20241AN24 support? The unit is designed for both chassis mount and DIN Rail installation.