SIEMENS 6SE6440-2UD17-5AA1 – 0.75kW Single-Phase Variable Frequency Drive | Micromaster 440 Series
Engineering Background: The Micromaster 440 (MM440) is Siemens’ flagship general-purpose inverter platform, engineered for demanding industrial motion-control applications where precise speed regulation, dynamic torque response, and robust protection are non-negotiable. Introduced as part of the SINAMICS predecessor family, the MM440 remains a benchmark reference in global automation engineering.
Product Positioning: The 6SE6440-2UD17-5AA1 is the entry-level power-class variant of the MM440 series — a 0.75 kW (1 HP), 200–240 V single-phase input / three-phase output drive. It is purpose-built for OEM machine builders, panel integrators, and MRO replacement scenarios requiring a compact, feature-rich VFD with full vector-control capability in a DIN-rail-friendly footprint.
Complete Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 6SE6440-2UD17-5AA1 |
| Series | Micromaster 440 (MM440) |
| Rated Output Power | 0.75 kW (1.0 HP) |
| Input Voltage | 1AC 200–240 V ±10% |
| Output Voltage | 3AC 0–240 V (variable) |
| Input Frequency | 47–63 Hz |
| Output Frequency Range | 0–650 Hz |
| Rated Input Current | 5.9 A |
| Rated Output Current | 3.7 A |
| Overload Capacity | 150% for 60 s / 200% for 3 s |
| Control Mode | V/f, Flux Current Control (FCC), Sensorless Vector (SLVC), Closed-Loop Vector (VC) |
| PWM Frequency | 2–16 kHz (adjustable) |
| Braking | DC injection braking; dynamic braking (external resistor) |
| Digital Inputs | 6 × programmable DI (PNP/NPN selectable) |
| Analog Inputs | 2 × AI (0–10 V / 0–20 mA / 4–20 mA) |
| Digital Outputs | 3 × relay outputs (30 V DC / 250 V AC, 2 A) |
| Analog Output | 1 × AO (0–20 mA) |
| Communication | USS protocol (RS-485); optional PROFIBUS-DP, DeviceNet, CANopen via CB module |
| Protection Class | IP20 (NEMA 1 with optional kit) |
| Ambient Temperature | -10°C to +50°C (operating); -40°C to +70°C (storage) |
| Humidity | ≤95% RH, non-condensing |
| Altitude | Up to 1000 m without derating |
| Dimensions (H×W×D) | 173 × 73 × 149 mm |
| Weight | Approx. 1.2 kg |
| Certifications | CE, UL, cUL, C-Tick |
| SINAMICS Successor | SINAMICS G120C / G120 |
Proven Application Environments
- Pump & Fan Control — Energy-saving V/f characteristic with PID closed-loop for pressure/flow regulation
- Conveyor & Material Handling — Smooth ramp profiles with slip compensation for consistent belt speed
- Compressor Drives — Sensorless vector mode for high starting torque without encoder feedback
- Textile & Winding Machines — Precise tension control via closed-loop vector with encoder (HTL/TTL)
- HVAC Systems — Integrated PID controller with sleep/wake function for energy optimization
- OEM Machine Replacement — Drop-in MRO substitute for legacy MM420/MM430 installations
- Laboratory & Test Rigs — Wide output frequency range (0–650 Hz) for motor characterization
Engineering Advantages
- Full Vector Control Without Encoder — SLVC mode delivers ±0.5% speed accuracy and high breakaway torque, eliminating encoder wiring cost
- Kinetic Buffering — Ride-through during brief supply interruptions, preventing nuisance trips on unstable grids
- Flux Current Control (FCC) — Faster dynamic response than standard V/f; ideal for variable-torque loads
- Comprehensive Parameter Set — 600+ parameters accessible via BOP/AOP operator panel or STARTER/SCOUT commissioning software
- Modular I/O Expansion — CB communication boards and optional encoder module (STC) add fieldbus and closed-loop capability without hardware redesign
- Built-in EMC Filter — Class A filter integrated; meets EN 61800-3 Category C2 without external components
- Fault Memory & Diagnostics — Last 8 fault codes with timestamps stored in non-volatile memory for root-cause analysis
System Architecture & Signal Flow
The 6SE6440-2UD17-5AA1 accepts 1-phase 200–240 V AC at the input terminals (L/N), rectifies to DC bus, and inverts to 3-phase PWM output (U/V/W) for the connected motor. The control board processes setpoint signals from analog inputs (AI1/AI2), digital command inputs (DIN1–DIN6), or fieldbus (USS/PROFIBUS), executing the selected control algorithm (V/f / FCC / SLVC / VC) in real time. Output relay contacts (DOUT1–DOUT3) provide status feedback to the PLC or supervisory system. An optional braking chopper output (B+/B-) connects an external resistor for regenerative energy dissipation.
Recommended PLC pairing: SIMATIC S7-1200 / S7-300 via PROFIBUS-DP CB module, or any PLC with RS-485 USS master library.
Sourcing & Quality Verification
- Origin: Genuine Siemens production; sourced from authorized distributors and verified surplus channels
- Inspection Protocol: Each unit undergoes visual inspection, label authenticity check, and power-on functional test prior to dispatch
- Traceability: Serial number and date code recorded; available upon request for warranty and compliance documentation
- Packaging: Original or equivalent ESD-safe anti-static packaging with foam cushioning
- Warranty: 90-day Konmask operational warranty; extended coverage available on request
Procurement Process
- Confirm Part Number — Verify 6SE6440-2UD17-5AA1 matches your nameplate or BOM requirement
- Request Quote / Place Order — Add to cart or contact [email protected] for volume pricing and lead time
- Technical Pre-Sales Support — Our engineers confirm compatibility with your motor rating, control topology, and fieldbus architecture
- Dispatch & Tracking — Ships within 1–3 business days; tracking number provided via email
- Post-Sales Support — Commissioning guidance, parameter backup files, and fault-code interpretation available
Technical FAQ
Q: Can this drive run a 3-phase motor from a single-phase supply?
A: Yes. The 6SE6440-2UD17-5AA1 is specifically rated for 1AC input and produces 3AC output. Derate output current by ~10% for continuous operation.
Q: Is an external EMC filter required?
A: No. An integrated Class A EMC filter meets EN 61800-3 C2 requirements. For Category C1 (residential), an additional external filter is recommended.
Q: What is the difference between SLVC and VC mode?
A: SLVC (Sensorless Vector Control) estimates rotor flux without an encoder — suitable for most applications. VC (Vector Control) requires an HTL/TTL encoder for highest accuracy (<0.01% speed regulation) and full torque at zero speed.
Q: Can I connect this to a SIMATIC S7 PLC via PROFIBUS?
A: Yes, with the optional CB15 PROFIBUS-DP communication board installed in the drive’s option slot.
Q: What is the direct SINAMICS replacement?
A: The SINAMICS G120C CU240E-2 with PM240-2 power module is the recommended successor. Parameter migration is supported via STARTER software.
Q: Is this unit new or refurbished?
A: Stock condition is specified at time of inquiry. All units are tested and verified functional. Condition (new surplus / refurbished) and date code are disclosed prior to order confirmation.
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