3RT2036-1AP00 Siemens Power Contactor 3RT20361AP00 Brand New Sealed
Siemens 3RT2036-1AP00 | SIRIUS 3RT2 Power Contactor
Part Number: 3RT2036-1AP00
Manufacturer: Siemens AG
Product Family: SIRIUS 3RT2
Type: 3-Pole Power Contactor (AC Motor Switching)
Overview
The 3RT2036-1AP00 is a 3-pole power contactor from Siemens' SIRIUS 3RT2 series, designed for switching AC induction motors up to 22 kW at 400V. The S2 frame size provides enhanced capabilities with heavier contact construction, greater thermal mass, and mechanical robustness to handle higher currents involved in starting and running 22kW drives.
Applications include large compressors, high-capacity pump stations, heavy-duty conveyor drives, industrial fan systems, and machine tool main drive motors. It is also suitable for resistive loads at higher currents than its motor rating. This model replaces the earlier 3RT1036-1AP00, maintaining the same ratings, terminal configuration, and dimensional footprint.
Key Specifications
| Parameter |
Value |
| Part Number |
3RT2036-1AP00 |
| Manufacturer |
Siemens |
| Product Series |
SIRIUS 3RT2 |
| Utilisation Category |
AC-3e / AC-3 |
| Main Contact Configuration |
3 NO (3-pole) |
| Rated Current (AC-3, 400V) |
50 A (51 A per updated spec) |
| Motor Rating |
22 kW @ 400V / 11 kW @ 230V |
| Coil Voltage |
230V AC, 50 Hz |
| Integrated Auxiliary |
1 NO + 1 NC |
| Size |
S2 |
| Connection |
Screw terminals |
| Insulation Voltage (Ui) |
690 V |
| Impulse Withstand Voltage |
6 kV |
| Degree of Protection |
IP20 |
| Ambient Temperature |
−25°C to +60°C (with derating above +40°C) |
| Net Width |
55 mm |
| Standards |
IEC 60947-4-1, IEC 60947-5-1, IEC 61508 |
| Certifications |
IEC, UL, CSA, CE, CCC, SN 31920 |
| Weight |
Approx. 0.985 kg |
S2 Frame Size Capability
The S2 frame size contactor features a heavier contact bridge, larger contact gap, and greater arc quenching capacity compared to smaller S0 and S00 units. These physical differences enable the 50A motor rating and allow handling of locked-rotor currents reaching 350A or more during contact closure.
The higher thermal mass means the contactor can absorb more switching energy before temperature rises affect performance, making it suitable for applications with frequent starts where substantial switching energy is generated over operational cycles.
Integrated Auxiliary Contacts
Each 3RT2036-1AP00 includes one integrated NO auxiliary contact and one integrated NC auxiliary contact mechanically linked to the main contact carrier. These provide real-time feedback of the contactor's actual state for control system monitoring and safety functions.
The NC auxiliary serves as standard input for motor starter self-monitoring, while the NO auxiliary is typically wired in sealing circuits for manual motor starters. This safety monitoring function meets requirements of many machine safety standards.
Functional Safety Applications
The 3RT2036-1AP00 carries IEC 61508 certification for functional safety applications. When properly combined with safety relay units or safety PLCs, these contactors can contribute to safety functions rated up to certain SIL and PL levels. Consult product Safety Evaluation Tool and applicable machinery safety standards for specific application requirements.
Frequently Asked Questions
Q1: Can the 3RT2036-1AP00 be used in star-delta starters with 230V coil requirements?
Yes, the 3RT2036-1AP00 can serve as the main and delta contactor in star-delta starters. Standard SIRIUS star-delta link modules provide necessary mechanical and electrical interlocking. Verify the star contactor rating matches the reduced-current star condition.
Q2: Is noticeable humming normal after replacement?
Some AC coil hum is normal due to the varying magnetic field. If noticeably louder, check for dirt or corrosion on magnet seating surfaces that may prevent proper armature seating, increasing the gap and hum level.
Q3: Can the contactor be mounted on its side (rotated 90°)?
Standard mounting is upright. While rotation to horizontal or inverted positions is possible, rated current may require derating due to altered convection cooling. Consult product datasheet for permissible derating in non-standard mounting positions.
Q4: What is the maximum wire cross-section for main contact terminals?
S2 screw terminals accommodate wire cross-sections from approximately 2.5mm² to 35mm² depending on terminal type. Flexible stranded conductors with appropriate cable end ferrules are recommended for panel wiring. Control terminals accept smaller cross-sections typically 0.5mm² to 4mm².
Q5: Is the contactor suitable for 22kW pump motors starting 15-20 times per hour?
High-frequency AC-3 switching at 15-20 starts per hour is demanding. Calculate total starts over required service interval and compare against published electrical life curve. If required life exceeds rating, consider more frequent contact replacement, soft starters to limit starting current, or wye-delta starters to reduce starting current.
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