Siemens 3RT20241AF00 Contactor (S0 Frame, 12 A, 110 VAC)
System Placement — S0 Frame and 110 VAC Coil
In panel installations the S0 frame size suits motor branch circuits and auxiliary control circuits where the 12 A rating and 110 VAC coil align with standard industrial control voltages. The 65VA inrush demand during pull-in is a key factor when sizing control transformers or sizing protective devices upstream of the coil circuit.
Coil and Contact Performance — 3RT20241AF00 Specified Values
Coil characteristics
- Coil Voltage: 110VAC
- Must Operate Voltage: 88 VAC (80% of nominal)
- Coil Power: 65VA
- Operate Time: 38 ms
Contact characteristics
- Contact Rating (Current): 12 A
- Contact Form: 3PST-NO (3 Form A)
- Features: Auxiliary Contacts
- Base Product Number: 3RT2024
Comparison — 3RT20241AF00 vs Alternate Coil Voltage Options
All alternatives below share the Siemens 3RT2024 series S0 frame, 12 A contact rating, chassis/DIN rail mounting, and 65VA coil power. The primary differentiator is coil voltage; users must verify coil compatibility with their control system before specifying.
| Spec | 3RT20241AF00 | 3RT20241AF04 | 3RT20241AK60 | 3RT20241AU00 |
|---|---|---|---|---|
| Coil Voltage | 110VAC | 110VAC | 120VAC | 240VAC |
| Must Operate Voltage | 88 VAC | 88 VAC | 96 VAC | 192 VAC |
| Contact Form | 3PST-NO (3 Form A) | 3PST-NO (3 Form A) | 3PST-NO (3 Form A) | 3PST-NO (3 Form A) |
| Contact Rating (Current) | 12 A | 12 A | 12 A | 12 A |
| Coil Power | 65VA | 65VA | 68VA | 65VA |
| Operate Time | 38 ms | 40 ms | 38 ms | 40 ms |
| Mounting Type | Chassis Mount, DIN Rail | Chassis Mount, DIN Rail | Chassis Mount, DIN Rail | Chassis Mount, DIN Rail |
- 3RT20241AF04 — same 110VAC coil; differs in contact arrangement (2NO/2NC vs 1NO/1NC) and packaging (Box vs Bulk), providing higher auxiliary contact density for more complex control schemes.
- 3RT20241AK60 — 120VAC coil lifts must-operate to 96 VAC; 68VA coil power is slightly higher; bulk packaging retained.
- 3RT20241AU00 — 240VAC coil raises must-operate threshold to 192 VAC; suited for 230–240 V control bus configurations.