SIEMENS 6SE6440-2AD31-1CA1 MICROMASTER 440 11kW Inverter | Replacement, Equivalent & Selection Guide
The SIEMENS 6SE6440-2AD31-1CA1 is a high-performance variable frequency drive (VFD) from the MICROMASTER 440 series, designed for demanding industrial motor control applications. This unit delivers 11 kW (15 HP) output power for three-phase motors operating on a 380–480 V AC supply. Konmask.com provides genuine, sourced, and verified units with full traceability.
Technical Specifications
- Part Number: 6SE6440-2AD31-1CA1
- Series: MICROMASTER 440 (MM440)
- Manufacturer: Siemens AG
- Output Power: 11 kW / 15 HP
- Input Voltage: 3-Phase AC 380–480 V (±10%)
- Input Frequency: 47–63 Hz
- Output Current: 25.0 A (CT) / 31.0 A (VT)
- Output Frequency: 0–650 Hz
- Control Mode: V/f, Sensorless Vector (FVC), Closed-Loop Vector
- Protection Rating: IP20 (chassis)
- Overload Capacity: 150% for 60 s (CT); 110% for 60 s (VT)
- Communication: USS protocol (RS-485); optional PROFIBUS, DeviceNet via CB
- Braking: DC braking, compound braking; optional dynamic braking
- Weight: Approx. 5.48 kg
- Ambient Temperature: -10°C to +50°C (derate above 40°C)
- Standards: CE, UL, cUL, C-Tick
Compatible Replacement & Equivalent Models
The following models are commonly evaluated as direct or functional replacements for the 6SE6440-2AD31-1CA1. Always verify electrical and mechanical compatibility before substitution:
- SIEMENS 6SE6440-2AD31-5CA1 — Same series, 15 kW variant; uprated replacement for higher load margins
- SIEMENS 6SE6420-2AD31-1CA1 — MICROMASTER 420 equivalent; suitable for simpler pump/fan loads without vector control requirement
- SIEMENS 6SL3210-1KE21-3AF1 — SINAMICS G120C 11 kW; modern successor platform with integrated safety functions
- SIEMENS 6SL3210-1KE21-3UF1 — SINAMICS G120C 11 kW with USS/MODBUS; drop-in functional equivalent
- ABB ACS580-01-025A-4 — Third-party equivalent, 11 kW, 3-phase 380–480 V; compatible for general-purpose applications
- Yaskawa GA700 CIMR-GA4A0023FAA — Cross-brand equivalent for advanced vector control applications
Note: Cross-brand replacements require parameter re-commissioning and wiring verification. Contact Konmask for selection support.
Why Choose the Original Model
- Proven reliability in continuous industrial duty cycles exceeding 10+ years field deployment
- Full MICROMASTER 440 ecosystem compatibility: existing parameter sets (P-parameters), operator panels (BOP/AOP), and communication boards reusable
- Certified for CE, UL, and C-Tick — meets global compliance requirements without re-certification
- Siemens global spare parts and technical support network
- Sensorless vector control enables precise torque management without encoder feedback
Typical Applications
- Pump and fan speed control in HVAC and water treatment systems
- Conveyor and material handling drives
- Compressor control in industrial refrigeration
- Mixer and agitator drives in chemical and food processing
- Machine tool spindle and feed axis control
- Textile and printing machinery
System Compatibility
- PLC Integration: Compatible with Siemens S7-200, S7-300, S7-400, S7-1200, S7-1500 via USS/PROFIBUS
- Operator Panels: BOP (Basic Operator Panel), AOP (Advanced Operator Panel)
- Communication Boards: CB15 (PROFIBUS-DP), CB35 (DeviceNet), CB65 (CANopen)
- Motor Types: Standard induction motors (IEC/NEMA); compatible with Siemens 1LA, 1LE, 1LG series
- Input Filters: Class A/B EMC filters available (6SE6400-2FA01-4AB0 and variants)
- Output Reactors: Recommended for cable runs >50 m
Selection Guide
Use the following criteria to confirm the 6SE6440-2AD31-1CA1 is the correct model for your application:
- Motor Power: 11 kW rated motor (do not exceed 25 A CT output current)
- Supply Voltage: 3-phase 380–480 V AC available at installation point
- Load Type: Constant torque (CT) for conveyors/compressors; variable torque (VT) for pumps/fans
- Control Requirement: Basic V/f → MM420 sufficient; Sensorless/Closed-loop vector → MM440 required
- Communication Bus: If PROFIBUS-DP required, add CB15 communication board
- Environment: IP20 for clean panel mounting; use IP54/IP65 enclosure for harsh environments
- Braking: If regenerative braking needed, add external braking resistor (6SE6400-4BD16-5CA0)
Not sure which model fits? Contact our selection team with your motor nameplate data and application details.
Quality Assurance & Sourcing
- All units sourced from authorized distributors or verified surplus channels
- Pre-shipment inspection: visual, label verification, and power-on functional test where applicable
- Serialization and firmware version documented per shipment
- Anti-counterfeit verification available on request
- Warranty: 12 months from date of shipment (DOA replacement within 30 days)
How to Order
- Part Number: 6SE6440-2AD31-1CA1
- Minimum Order: 1 unit
- Lead Time: In-stock units ship within 1–3 business days; sourced units 5–15 business days
- Shipping: DHL / FedEx / UPS international express; sea freight available for bulk orders
- Payment: T/T, PayPal, credit card, LC (for orders >USD 5,000)
- Quote Request: support@konmask.com | +0086 19859288691
Replacement & Compatibility FAQ
- Q: Can I replace 6SE6440-2AD31-1CA1 with a SINAMICS G120?
- A: Yes, the SINAMICS G120C 11 kW (6SL3210-1KE21-3UF1) is the recommended modern successor. Parameter migration is required; Siemens provides a migration tool. Physical dimensions differ — verify panel space.
- Q: Is the MM420 a drop-in replacement for the MM440?
- A: Only for V/f applications. The MM420 lacks closed-loop vector control and some I/O points. Not recommended for torque-critical applications.
- Q: What is the difference between 6SE6440-2AD31-1CA1 and 6SE6440-2UD31-1CA1?
- A: The “AD” variant is 3-phase 380–480 V input; the “UD” variant is single-phase 200–240 V input. Ensure supply voltage matches before ordering.
- Q: Can I use a third-party VFD as a replacement?
- A: Functionally yes for basic speed control. However, PROFIBUS communication, Siemens-specific parameter sets, and BOP/AOP panels will not be compatible. Re-commissioning is mandatory.
- Q: Do you provide a test report or certificate of conformity?
- A: Yes, available on request for all shipments. Contact support@konmask.com.
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Contact: support@konmask.com | +0086 19859288691
