1065 A at 40 °C — the real-world current rating
The 3RW4454-6BC35: That derating curve is what you size the starter against, not the headline 1065 A — if your panel ambient runs at 50 °C, the usable current drops 10 %. Insulation voltage is rated 690 V, operating frequency 50/60 Hz at 115 V control supply. The 8 % minimum load setting means it handles lightly-loaded motors without dropping out of starting mode.
Integrated bypass and inside-delta topology
Integrated bypass contact system means the thyristors are shorted out once the motor is up to speed — no continuous heat dissipation from the silicon stack during run. The thyristors themselves are rated for the start duty only, which keeps the enclosure size down. Inside-delta circuit wiring reduces the current the starter sees by about 42 % compared to standard in-line connection — a 1065 A starter wired inside-delta handles a motor that would otherwise need a ~1800 A unit. That saves panel space and busbar cost.
Mounting and connection — panel integration
Fastening method is screw fixing with a vertical mounting surface; the unit is rotatable ±90° and tiltable ±22.5° front/back. That gives flexibility for tight enclosures but means the mounting plate needs to carry the full 640 mm height × 510 mm width × 290 mm depth footprint. Main current circuit connects via busbar — the terminal range accepts stranded 70–240 mm², finely stranded 50–240 mm², and AWG 2/0–500 kcmil. Clearance distances: 100 mm upwards, 75 mm downwards, 5 mm at the sides. The 500 m maximum wire length to the motor sets a practical limit on drive-to-load distance — longer runs need a reactor or output filter.
Protection and diagnostics — less external hardware needed
Built-in motor overload protection, intrinsic device protection (over-temperature, phase loss), and adjustable current limitation. That means you can skip the separate overload relay in many panels — one less component to wire and set. Display for fault signals and external reset input. During commissioning, the display shows the fault code directly — no laptop needed to figure out why it tripped. Pollution degree 3 per IEC 60947-4-2 confirms it's rated for the dust and humidity of an industrial floor.
Lifecycle and sourcing — current production
Storage temperature range is -25 to +80 °C per IEC 60721 class 1K6 (occasional condensation, no salt mist, sand exclusion). Operating ambient during operation is 60 °C max, with derating starting at 40 °C.