🔹 Siemens Magnet Coil – 3TY7403-0AU0 (240V AC, 3TF30–3TF43 Series)
The Siemens 3TY7403-0AU0 is a 240V AC magnet coil for Siemens 3TF series contactors, designed to operate the contactor mechanism in industrial control systems. It is used to energize the coil assembly, which generates a magnetic field to pull in the armature and switch the main power contacts ON/OFF reliably.
This coil is compatible with Siemens 3TF30–3TF33 and 3TF40–3TF43 contactors, and also works with related Siemens 3TH / 3TB / 3TC series depending on the frame size. It is widely used in motor control centers (MCC), industrial automation panels, pumps, compressors, and power distribution systems.
From Siemens coil coding, the 0AU0 variant corresponds to a 240V AC control voltage execution, commonly used in industrial and commercial control circuits for safe and stable switching performance.
Based on Siemens 3TY7403 datasheets and equivalent variants in the same family, these coils are designed as direct replacements for older coil generations, ensuring easy maintenance and retrofit compatibility in existing installations.
🔹 Key Features
• Siemens 3TY Series magnet coil
• Model: 3TY7403-0AU0
• Rated control voltage: 240V AC (50/60 Hz)
• Suitable for Siemens 3TF30–33 and 3TF40–43 contactors
• Compatible with related 3TH / 3TB / 3TC series contactors
• Electromagnetic actuation for reliable switching
• High insulation strength and thermal durability
• Designed for continuous industrial duty operation
• Ensures stable pull-in and drop-out performance
• Easy replacement for maintenance and retrofit applications
• Used in motor control and automation systems
| Parameter | Specification |
|---|---|
| Product Series | Siemens 3TY Series |
| Model Number | 3TY7403-0AU0 |
| Product Type | Magnet Coil for Contactor |
| Rated Control Voltage | 240V AC (50/60 Hz) |
| Compatible Contactors | 3TF30–33, 3TF40–43 |
| Application | Industrial motor control, switching systems |
| Coil Type | AC operated |
| Variant Code | AU0 |
| Mounting Type | Internal coil assembly |
| Brand | Siemens |
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