Siemens 3RT20242AV00 Electromechanical Contactor
Parameter Summary
| Specification | Value |
|---|---|
| Coil Voltage | 400 VAC |
| Contact Rating | 12 A |
| Contact Form | 3PST-NO (3 Form A) |
| Base Product Number | 3RT2024 |
| Coil Power | 65 VA |
| Must Operate Voltage | 320 VAC |
| Operate Time | 40 ms |
| Mounting | Chassis Mount, DIN Rail |
| Encapsulation | Box |
| Features | Auxiliary Contacts (1NO/1NC) |
| Operating Temperature | 25°C to 60°C |
Product Context
The 3RT20242AV00 is a Size S0 electromechanical contactor from Siemens featuring a 400 VAC coil with a must-operate threshold of 320 VAC. It provides a 12 A contact rating in a 3PST-NO (three-pole normally open) configuration, suitable for motor branch and lighting load switching in industrial control circuits. The unit includes one normally open and one normally closed auxiliary contact, housed in a box-style encapsulation for panel mounting.
Key Specifications
- Series: 3RT2024 (Size S0 frame)
- Coil Power Consumption: 65 VA (inrush)
- Main Contacts: 3PST-NO, 12 A per pole
- Auxiliary Contacts: 1 NO + 1 NC integrated
- Mounting: Chassis or DIN Rail (TH 35 rails per EN 60715)
- Operate Time: 40 ms (pickup)
- Operating Range: 25°C to 60°C
Catalog Comparison: Coil Voltage Selection
The 3RT2 family shares the same 12 A contact structure and 65 VA coil power across voltage variants. The following table contrasts the primary part against available 400 VAC and 230 VAC options to illustrate coil voltage trade-offs during selection.
| Specification | 3RT20242AV00 (Primary) | 3RT20242AV04 | 3RT20242AP04 | 3RT20242AP00 |
|---|---|---|---|---|
| Coil Voltage | 400 VAC | 400 VAC | 230 VAC | 230 VAC |
| Contact Rating | 12 A | 12 A | 12 A | 12 A |
| Contact Form | 3PST-NO | 3PST-NO | 3PST-NO | 3PST-NO |
| Coil Power | 65 VA | 65 VA | 65 VA | 65 VA |
| Aux Contacts | 1NO/1NC | 2NO/2NC | 2NO/2NC | 1NO/1NC |
| Must Operate | 320 VAC | 320 VAC | 184 VAC | 184 VAC |
Why These Parts Are Similar
The 3RT20242AV04 shares the 400 VAC coil class and size S0 frame with the primary part; the sole difference is doubled auxiliary contacts (2NO/2NC) for expanded status signaling in larger control schemes. The 3RT20242AP04 and 3RT20242AP00 match the primary part's contact rating and auxiliary contact count but operate at 230 VAC with a lower must-operate threshold of 184 VAC; these variants suit 230 V control systems with tighter dropout margins.
Application Notes
Selection should confirm the control circuit voltage matches the coil rating (400 VAC nominal). The must-operate voltage of 320 VAC defines the minimum supply voltage required for guaranteed pickup under worst-case conditions. The 1NO/1NC auxiliary complement supports basic interlock and status feedback functions; for multi-state monitoring, the 2NO/2NC variants may be preferable.
Contactors in the 3RT2 family are compatible with 3RT2 overload relays and 3RV circuit breakers for coordinated motor protection in a standardized Size S0 footprint.
Similar Catalog Parts
| MPN | Coil Voltage | Contact Form | Contact Rating | Similarity |
|---|---|---|---|---|
| 3RT20242AV04 | 400 VAC | 3PST-NO | 12 A | 1.00 |
| 3RT20242AP00 | 230 VAC | 3PST-NO | 12 A | 0.96 |
| 3RT20242AB00 | 24 VAC | 3PST-NO | 12 A | 0.96 |
All listed parts share the same 3RT2024 base product number, 12 A contact rating, and box-style chassis-mount form factor; differences are limited to coil voltage and auxiliary contact count.
FAQ
What is the must-operate voltage for the 3RT20242AV00? The must-operate voltage is 320 VAC, meaning the coil will reliably pick up when the supply reaches this threshold under nominal temperature conditions.
Can the 3RT20242AV00 be mounted on a DIN rail? Yes, the contactor supports both chassis mount and TH 35 DIN rail mounting per EN 60715.
What is the difference between 3RT20242AV00 and 3RT20242AV04? The 3RT20242AV00 provides 1NO/1NC auxiliary contacts, while the 3RT20242AV04 offers 2NO/2NC auxiliary contacts for expanded monitoring capability. Both share the 400 VAC coil.