🔹 Siemens Magnet Coil – 3TY7403-0AP0 (230V AC, 3TF30–3TF43 Series)
The Siemens 3TY7403-0AP0 is a 230V AC magnet coil for contactors designed for Siemens 3TF series power contactors. It is used to energize the contactor mechanism, enabling reliable switching of electrical circuits in industrial motor control and automation systems.
This coil is compatible with Siemens 3TF30–3TF33 and 3TF40–3TF43 contactors, as well as related 3TH, 3TB, and 3TC series depending on frame size. It is widely used in industrial control panels, MCCs, pumps, compressors, and general power distribution systems.
When voltage is applied (230V AC at 50Hz / 277V AC at 60Hz), the coil generates a magnetic field that pulls the contactor armature, closing the main power contacts. When de-energized, the spring mechanism opens the contacts safely.
This coil is a replacement part for older Siemens coil types such as 3TY4803-0AP0, making it suitable for maintenance and retrofitting applications in existing installations.
🔹 Key Features
• Siemens 3TY Series magnet coil
• Model: 3TY7403-0AP0
• Rated control voltage: 230V AC (50Hz) / 277V AC (60Hz)
• Suitable for Siemens 3TF30–3TF33, 3TF40–3TF43 contactors
• Compatible with related 3TH / 3TB / 3TC series contactors
• Electromagnetic operation for reliable switching
• High insulation and thermal durability
• Designed for continuous industrial duty
• Easy replacement coil for maintenance applications
• Ensures stable pull-in and drop-out performance
• Used in motor control and automation systems
| Parameter | Specification |
|---|---|
| Product Series | Siemens 3TY Series |
| Model Number | 3TY7403-0AP0 |
| Product Type | Magnet Coil for Contactor |
| Rated Control Voltage | 230V AC (50Hz) / 277V AC (60Hz) |
| Compatible Contactors | 3TF30–33, 3TF40–43 |
| Application | Industrial motor control, switching systems |
| Coil Type | AC operated |
| Replacement For | 3TY4803-0AP0 |
| Mounting Type | Internal coil assembly |
| Brand | Siemens |
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