Siemens 6SE6440-2AD27-5CA1 MICROMASTER 440 AC Drive

Key Features

• Built-in Class A EMC Filter – Reduces electromagnetic interference, ensuring compliance with EMC regulations

• High Overload Capacity – 150% overload for 60 seconds, 200% for 3 seconds, handling demanding load peaks

• Sensorless Vector Control (SLVC) – Provides high starting torque and precise speed control without encoder feedback

• Flux Current Vector Control (FCVC) – Enhanced dynamic performance and optimal motor management

• Integrated Braking Chopper – Built-in braking unit for controlled deceleration (models up to 75 kW)

• Flexible I/O Configuration – 6 programmable digital inputs, 2 analog inputs (0–10V / 0–20mA), 2 analog outputs, and 3 relay outputs

• Modular Design – Operator panels and communication modules can be easily exchanged for maximum configuration flexibility

• Compact Frame Size C – 245 × 185 × 195 mm (H × W × D), IP20 protection

Technical Parameters

Core Advantages

1. Proven MICROMASTER Reliability

The MICROMASTER 440 series is one of Siemens' most widely deployed and trusted drive platforms, with millions of units installed worldwide. Its robust design and mature firmware ensure reliable, long-term operation in demanding industrial environments .

2. Built-in EMC Filter Saves Space and Cost

The integrated Class A EMC filter eliminates the need for external filtering hardware, reducing panel space requirements, wiring complexity, and installation cost. This makes the drive immediately compliant with EMC regulations in most industrial environments .

3. Flexible Control Modes

The drive supports multiple control modes including V/f control, sensorless vector control (SLVC), and flux current vector control (FCVC). This flexibility allows optimization for different application requirements — from simple fan and pump control to demanding torque applications .

4. Comprehensive Protection Suite

The MM440 includes complete motor and inverter protection features such as fast current limiting (FCL), thermal overload protection, ground fault detection, and automatic restart after power failure or fault conditions .

5. Modular Expandability

The drive's modular design allows easy addition of operator panels (AOP/BOP), communication modules (PROFIBUS, DeviceNet, CANopen), and I/O expansion. This enables customization to match specific application requirements without replacing the base drive .

Applications

The Siemens 6SE6440-2AD27-5CA1 is deployed across a wide range of industrial motor control applications:

Recommended Models & Related Products

Note: The MICROMASTER 440 series has been discontinued by Siemens and is now classified as a spare part. For new installations, Siemens recommends the SINAMICS G120 series as the modern replacement platform. However, the MM440 remains widely available through spare parts channels for existing installations .

What's Included

• 1 × Siemens 6SE6440-2AD27-5CA1 MICROMASTER 440 AC Drive

Note: AOP/BOP operator panel, communication modules, and mounting accessories are sold separately.

Why Buy From Us?

• New and Original – Genuine Siemens product

• In Stock – Ready to ship same/next business day

• Fully Tested – Each unit verified for functionality

• Warranty Included – Purchase with confidence

• Technical Support – Drive configuration assistance available

Frequently Asked Questions (FAQ)

Q1: What is the Siemens 6SE6440-2AD27-5CA1?

It is a MICROMASTER 440 variable frequency drive rated at 7.5 kW constant torque (11 kW square-law torque), designed for speed and torque control of three-phase AC motors. It operates on 380–480 V AC three-phase input and includes a built-in Class A EMC filter .

Q2: What is the power rating of this drive?

The drive delivers 7.5 kW (10 HP) for constant torque applications and 11 kW (15 HP) for square-law torque applications (fans, pumps). Rated output current is 18.4 A for constant torque .

Q3: Does this drive include an operator panel?

No. This unit is supplied without an AOP (Advanced Operator Panel) or BOP (Basic Operator Panel). Operator panels can be ordered separately if needed .

Q4: What is the difference between constant torque and square-law torque ratings?

Constant torque applications (conveyors, extruders, positive displacement pumps) require full torque across the entire speed range — 7.5 kW. Square-law torque applications (centrifugal fans, centrifugal pumps) require torque proportional to speed squared — 11 kW .

Q5: What control modes does the MM440 support?

The drive supports V/f control, sensorless vector control (SLVC), and flux current vector control (FCVC). It also includes a built-in PID controller with auto-tuning .

Q6: What is the output frequency range?

The output frequency range is 0–650 Hz .

Q7: What I/O does the drive provide?

The MM440 provides 6 programmable isolated digital inputs, 2 scalable analog inputs (0–10V, 0–20mA; can serve as 7th/8th digital inputs), 2 analog outputs (0–20mA), and 3 programmable relay outputs .

Q8: Does the drive have built-in communication?

Yes. The drive includes USS and Modbus RTU communication via RS-485 as standard. Optional modules enable PROFIBUS, DeviceNet, CANopen, and other protocols .

Q9: What is the protection class and operating temperature?

The drive is IP20 rated and operates from -10°C to +50°C .

Q10: Is a braking chopper included?

Yes. The MM440 includes a built-in braking chopper for controlled deceleration (standard on models from 0.12 kW to 75 kW) .

Q11: Is this a genuine Siemens product?

Yes. This is a new and original Siemens MICROMASTER 440 drive with article number 6SE6440-2AD27-5CA1 .

Q12: Is the MICROMASTER 440 still in production?

No. The MICROMASTER 440 series has been discontinued by Siemens and is classified as a spare part. For new installations, the SINAMICS G120 series is the recommended replacement platform. However, MM440 units remain available through spare parts channels for existing installations .