The Siemens 3RT1075-2AP36 is a SIRIUS 3RT1 power contactor designed for switching high-power three-phase induction motors in industrial automation systems. With an AC-3 rating of 400 A and motor power capacity up to 200 kW at 400 V AC, this 3-pole contactor is ideal for heavy-duty applications such as pump control, compressor operation, conveyor systems, and HVAC equipment.
Item No :
3RT1075-2AP36Order(MOQ) :
1 PiecePayment :
EXWProduct Origin :
GermanyShipping Port :
WuhanLead Time :
3~5 daysWeight :
5kg| Specification | Description |
|---|---|
| Manufacturer | Siemens |
| Model | 3RT1075-2AP36 |
| Product Family | SIRIUS 3RT1 Contactors, 3-pole, up to 250 kW |
| Product Type | Power Contactor |
| Number of Poles | 3 |
| Rated Operational Current (AC-3) | 400 A @ 400 V |
| Rated Operational Current (AC-1) | 430 A @ 400 V |
| Rated Operational Current (AC-4) | 350 A @ 400 V |
| Motor Power Rating (AC-3, 400V) | 200 kW / 400 V AC (50-60 Hz) |
| Motor Power Rating (AC-3, 690V) | 400 kW |
| Motor Power Rating (AC-3, 1000V) | 250 kW |
| Control Supply Voltage | 220-240 V AC/DC (wide range) |
| Auxiliary Contacts | 2 NO + 2 NC |
| Main Circuit Connection | Busbar connection |
| Control/Auxiliary Connection | Spring-loaded terminal |
| Frame Size | S12 |
| Insulation Voltage (Rated) | 1,000 V |
| Mechanical Service Life | 10,000,000 operating cycles |
| Operating Frequency (AC-3) | 500 cycles/hour max |
| Protection Class | IP00 (IP20 with cover) |
| Operating Temperature | -25°C to +60°C |
| Dimensions (H x W x D) | 214 mm x 160 mm x 225 mm |
| Net Weight | Approx. 10.1 kg |
| Country of Origin | Germany |
| Lifecycle Status | Active (PM300) |
| Model | Description | Typical Application |
|---|---|---|
| 3RT1075-6AP36 | Same rating with screw terminals (vs. spring-loaded) | Applications requiring traditional screw connections |
| 3RT1076-2AP36 | Higher current rating (500 A / 250 kW) | Larger motor applications requiring more capacity |
| 3RT1066-2AP36 | Lower current rating (300 A / 160 kW) | Medium-power motor control |
| 3RT1075-6PP35 | Same rating with 24V DC PLC input and electronic drive | PLC-controlled applications with remaining lifetime indicator |
| 3RT1075-6AR36 | Same rating with 440-480 V AC/DC coil | North American voltage applications |
| 3RH2911-1HA22 | Auxiliary contact block (2 NO + 2 NC) | Additional auxiliary contacts if needed |
Q1: What is the primary function of this contactor?
The 3RT1075-2AP36 is a power contactor used to switch three-phase induction motors and other high-power loads. It is specifically rated for AC-3 duty (squirrel-cage motor starting and switching), making it suitable for standard motor control applications such as pumps, compressors, and conveyors.
Q2: What does the "AC-3" rating mean?
AC-3 is an utilization category defined in IEC 60947-4-1 for squirrel-cage induction motor starting and switching during normal operation. This means the contactor is designed to handle the high inrush currents that occur when motors start (typically 6-8 times rated current) while maintaining reliable switching performance.
Q3: What is the advantage of the spring-loaded terminal version (-2AP36) over the screw terminal version (-6AP36)?
The spring-loaded terminals offer:
Faster wiring – no screws to tighten, simply insert the conductor
Maintenance-free – no need to re-tighten after thermal cycling
Vibration-proof – ideal for mobile equipment or high-vibration environments
Q4: What is the control supply voltage range for this contactor?
The contactor features a wide-range AC/DC coil rated at 220-240 V AC/DC. This wide voltage range allows the same contactor to be used in different control systems without ordering voltage-specific variants, simplifying inventory management.
Q5: Can this contactor be used in safety-related applications?
The 3RT1075-2AP36 is a standard power contactor and is not certified for safety functions (SIL) on its own. For safety-related applications, it must be used in conjunction with safety relays or fail-safe control architectures that meet the required SIL/PL level. Siemens offers safety-rated contactors and relays for dedicated safety circuits.
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