Siemens 3RT1045‑1AK61 Power Contactor

Product Description

Siemens 3RT1045‑1AK61 is a SIRIUS classic 3‑pole non‑reversing power contactor designed for AC motor switching and general‑purpose load control in industrial automation systems. Rated 80 A AC‑3 with 37 kW motor capacity at 400 V, it features a 120 V AC operating coil, screw terminals and size S3 mechanical frame. This contactor supports DIN‑rail or screw‑on panel mounting, delivers stable switching performance for motor starters, pump and conveyor equipment, and allows modular expansion of auxiliary contacts according to field requirements.

Standard Features

• 3‑pole main contact design: Optimized for AC‑3 motor load switching up to 80 A rated operational current.
• 120 V AC control coil: Standard industrial coil voltage compatible with North‑American control circuits.
• Screw terminal connection: Provides reliable, vibration‑resistant wiring for main and auxiliary circuits.
• DIN‑rail and panel mounting: Supports two installation methods for flexible cabinet layout arrangements.
• Modular auxiliary contact expandability: Allows adding auxiliary contact blocks for feedback and interlock functions.
• Wide operating temperature range: Operates reliably within‑25 °C to +60 °C industrial ambient conditions.
• IEC 60947‑4‑1 compliance: Meets international low‑voltage contactor safety and performance standards.

Technical Specifications