3TF34,3TF35 AC contactor user manual, introduces the installation, wiring, operation, maintenance and other contents of the product
This manual describes safe installation and wiring of the Siemens 3TF34 and 3TF35 AC contactors. It includes dimensions, mounting options, permissible conductor sizes, torque values, and protective measures such as IP00 rating and required use of qualified personnel.
Technical data such as weight, temperature limits, rated insulation voltage, operating current, motor power ratings and short‑circuit protection are listed. Maintenance procedures cover coil replacement, auxiliary contact block service, cleaning, and spare‑part specifications.
| Weight (AC operation) | approx. 640 g |
|---|---|
| Weight (DC operation) | approx. 1210 g |
| Rated insulation voltage Ui AC | 690 V |
| Rated operating current Ie/AC‑1 (55 °C) | 55 A |
| Motor rating at 230 V | 8.5 kW |
| Short‑circuit protection – assignment type 1 | 80 A |
| Permissible main‑circuit solid conductor size | 1 – 16 mm² |
| Tightening torque (main terminals) | 2.5 – 3.0 Nm |
The contactor has a protection degree of IP00 according to IEC 60529.
Keep the pole faces clean and do not use grease, solvents, or sharp objects for cleaning.
The rated insulation voltage is 690 V AC.