Siemens 6SE6440-2UD31-1CA1 MICROMASTER 440 AC Drive

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What’s Included

• 1 × Siemens 6SE6440-2UD31-1CA1 MICROMASTER 440 AC Drive

Note: AOP/BOP operator panel, braking resistor, line reactor, and motor cables are sold separately.

Why Buy From Us?

• In Stock – Ready to ship immediately

• Genuine Siemens Product – Factory original component

• Warranty Included – 12-month warranty for purchase confidence

• Technical Support – MICROMASTER compatibility assistance available

Frequently Asked Questions (FAQ)

Q1: What is the Siemens 6SE6440-2UD31-1CA1?

It is a MICROMASTER 440 variable frequency drive rated at 11 kW constant torque (15 kW square-law torque) for 380–480 V 3 AC supply. It is the unfiltered variant supplied without an operator panel .

Q2: What is the difference between the “UD” and “AD” variants?

The UD variant (this item) is unfiltered and suitable for installations where an external filter is used or the supply is ungrounded (IT system). The AD variant includes an integrated Class A EMC filter for use on grounded TN systems .

Q3: Does this drive include an operator panel?

No. This unit is supplied without an AOP or BOP operator panel. If local control is required, the BOP (6SE6400-0BP00-0AA0) or AOP (6SE6400-0AP00-0AB0) must be ordered separately .

Q4: What is the power rating of this drive?

The drive is rated at 11 kW (15 HP) for constant torque (LO) applications and 15 kW (20 HP) for square-law torque (VT) applications such as pumps and fans .

Q5: What is the overload capability?

For Low Overload (LO): 140% for 3s, then 110% for 57s, then 100% for 240s (300s cycle). For High Overload (HO): 150% for 60s, then 100% for 240s (300s cycle) .

Q6: Is this drive still in production?

No. Siemens discontinued production effective October 1, 2019, and the product is classified under PM410: Spare parts only. Availability is through remaining stock and third-party suppliers .

Q7: Does this drive have a built-in braking chopper?

Yes. The MM440 includes an integrated braking chopper for connection of an external braking resistor (minimum 56 Ω) .

Q8: What is the operating temperature range?

The range is -10 to +40 °C for LO operation and -10 to +50 °C for HO operation .

Q9: What are the dimensions and weight?

Dimensions are 185 mm (W) × 245 mm (H) × 195 mm (D). Net weight is 5.50 kg .

Q10: What is the country of origin?

United Kingdom .

Q11: What should I verify before ordering?

Always verify the exact part number (6SE6440-2UD31-1CA1 for unfiltered vs. 2AD31-1CA1 for filtered), confirm your motor power and overload requirements (11 kW LO / 15 kW VT), ensure your supply voltage matches (380–480 V AC, 3-phase), and check whether you require an operator panel or external EMC filter for your installation.