© Siemens AG
MICROMASTER 440
Versatile Siemens MICROMASTER 4 converter with vector control, from 0.12 kW to 250 kW; Siemens has cancelled it and points to the modular SINAMICS G120 as the replacement
Price and delivery time are given after a technical review.
Production status: Discontinued
Siemens has cancelled this family. In the product record of every MICROMASTER 440 article number we checked, 'Phase Out Announce' is dated 1 October 2017 and 'Prod. Cancellation' 1 October 2019, and the item is called a 'spare part'. Siemens support entry 109746454 (February 2020) says the product can still be ordered although the type is cancelled; so this is not a new device but a spare part for installed machines. The next lifecycle stage has no date yet and no end date for spare-part supply appears in the Siemens sources we read; ask Siemens before relying on it for a new design or for stock. Siemens' replacement is the modular SINAMICS G120 (PM240-2 power module with a CU240E-2 control unit, or a CU250S-2 if an encoder module is fitted); for low-I/O applications without an encoder in the 0.55 kW to 18.5 kW range the SINAMICS G120C is also suggested. Siemens calls the compatibility of SINAMICS with MICROMASTER 4 'restricted': the project cannot be transferred directly, the drive must be recommissioned, the AOP panel and the DeviceNet module have no direct counterpart, and a CANopen module maps to the CU250S-2 CAN, which itself has been in the phase-out announcement stage since 1 October 2025.
Checked on Nov 2, 2026
A suggested successor is not an exact equivalent; the right model depends on your application.
The MICROMASTER 440 is the versatile member of Siemens' MICROMASTER 4 generation: for speed and torque control of three-phase motors, from 0.12 kW up to 200 kW for constant torque (CT) and up to 250 kW for variable torque (VT). Unlike the MM420 and MM430 it has vector control, with and without an encoder, and a built-in braking chopper up to frame size F. It works stand-alone or integrated into an automation system.
In the Siemens product record (SiePortal / Industry Mall) of every MICROMASTER 440 article number we checked, 'Phase Out Announce' is dated 1 October 2017 and 'Prod. Cancellation' 1 October 2019, and the item is described as a 'spare part'. Siemens support entry 109746454 (February 2020) says the product can still be ordered although the type is cancelled. In other words this converter is no longer a new device in Siemens' sales range and is offered as a spare part for installed machines.
The later lifecycle stages (Prod. Discont. and End Prod. Lifecycl.) have no date yet, but no end date for spare-part supply appears in the Siemens sources we read either. For a new design or for stocking, look at the replacement first.
Siemens' migration brochure states that it has decided to replace MICROMASTER with drives from the current SINAMICS family. The MICROMASTER 440 replacement, in the 07/2022 brochure and in Siemens' own migration guide (FAQ 82169413), is the modular SINAMICS G120: a power module in place of the power section and a control unit in place of the control board. Per that guide:
Siemens' own example: 6SE6440-2UC25-5CA1 with the PROFIBUS module 6SE6400-1PB00-0AA0 to the PM240-2 power module 6SL3210-1PC22-8UL0 with the CU240E-2 DP 6SL3244-0BB12-1PA1. Siemens calls the compatibility of SINAMICS with MICROMASTER 4 'restricted', so the replacement is not a drop-in.
1- or 3-phase 200 to 240 V, 3-phase 380 to 480 V and 3-phase 500 to 600 V input. In the 380 to 480 V class: 0.37 kW to 200 kW (CT) or 7.5 kW to 250 kW (VT). Frame sizes A to F plus FX and GX. V/f control up to 650 Hz and vector control (sensorless, sensorless torque control and with encoder) up to 200 Hz.
| Model | Order code | Code type | Attributes | Request |
|---|---|---|---|---|
| MICROMASTER 440, 0.12 kW, 1/3 AC 200 … 240 Vبدون فیلتر؛ کوچکترین مدل خانواده، ابعاد ۱۷۳ × ۷۳ × ۱۴۹ میلیمتر (ارتفاع × عرض × عمق) | 6SE6440-2UC11-2AA1 | Exact code |
| Request MICROMASTER 440, 0.12 kW, 1/3 AC 200 … 240 V |
| MICROMASTER 440, 0.37 kW, 3 AC 380 … 480 Vبدون فیلتر؛ کوچکترین مدل ردهٔ ۴۰۰ ولت | 6SE6440-2UD13-7AA1 | Exact code |
| Request MICROMASTER 440, 0.37 kW, 3 AC 380 … 480 V |
| MICROMASTER 440, 1.5 kW, 3 AC 380 … 480 Vبدون فیلتر؛ مدل ۱٫۵ کیلوواتی، ابعاد ۱۷۳ × ۷۳ × ۱۴۹ میلیمتر (ارتفاع × عرض × عمق) | 6SE6440-2UD21-5AA1 | Exact code |
| Request MICROMASTER 440, 1.5 kW, 3 AC 380 … 480 V |
| MICROMASTER 440, 3 kW, 3 AC 380 … 480 V, Class A filterبا فیلتر Class A داخلی؛ ابعاد ۲۰۲ × ۱۴۹ × ۱۷۲ میلیمتر (ارتفاع × عرض × عمق) | 6SE6440-2AD23-0BA1 | Exact code |
| Request MICROMASTER 440, 3 kW, 3 AC 380 … 480 V, Class A filter |
| MICROMASTER 440, 5.5 kW, 3 AC 200 … 240 Vبدون فیلتر؛ نمونهٔ خود Siemens در بروشور مهاجرت، که همراه ماژول PROFIBUS به PM240-2 6SL3210-1PC22-8UL0 با CU240E-2 DP 6SL3244-0BB12-1PA1 نگاشت شده است | 6SE6440-2UC25-5CA1 | Exact code |
| Request MICROMASTER 440, 5.5 kW, 3 AC 200 … 240 V |
| MICROMASTER 440, 7.5 kW, 3 AC 380 … 480 Vبدون فیلتر؛ ابعاد ۲۴۵ × ۱۸۵ × ۱۹۵ میلیمتر (ارتفاع × عرض × عمق) | 6SE6440-2UD27-5CA1 | Exact code |
| Request MICROMASTER 440, 7.5 kW, 3 AC 380 … 480 V |
| MICROMASTER 440, 30 kW, 3 AC 380 … 480 Vبدون فیلتر؛ ابعاد ۶۵۰ × ۲۷۵ × ۲۴۵ میلیمتر (ارتفاع × عرض × عمق) | 6SE6440-2UD33-0EA1 | Exact code |
| Request MICROMASTER 440, 30 kW, 3 AC 380 … 480 V |
| MICROMASTER 440, 75 kW, 3 AC 380 … 480 Vبدون فیلتر؛ ابعاد ۸۵۰ × ۳۵۰ × ۳۲۰ میلیمتر (ارتفاع × عرض × عمق) | 6SE6440-2UD37-5FA1 | Exact code |
| Request MICROMASTER 440, 75 kW, 3 AC 380 … 480 V |
| MICROMASTER 440, 200 kW, 3 AC 380 … 480 Vبدون فیلتر؛ بزرگترین کد بررسیشده، ابعاد ۱۵۳۳ × ۳۲۶ × ۵۴۵ میلیمتر (ارتفاع × عرض × عمق) | 6SE6440-2UD42-0GA1 | Exact code |
| Request MICROMASTER 440, 200 kW, 3 AC 380 … 480 V |
| Power rangePower range | 0.12 … 200 (constant torque), up to 250 (variable torque) kW |
|---|---|
| Voltage familiesVoltage families | 1/3 AC 200 … 240 V, 3 AC 380 … 480 V, 3 AC 500 … 600 V |
| Line voltage (400 V class)Line voltage (400 V class) | 380 … 480 ±10 % V AC |
| Line frequencyLine frequency | 47 … 63 Hz |
| Output frequency (V/f control)Output frequency (V/f control) | 0 … 650 Hz |
| Output frequency (vector control)Output frequency (vector control) | 0 … 200 Hz |
| Degree of protectionDegree of protection | IP20 |
| Power section technologyPower section technology | IGBT, PWM |
| Overload capability (constant torque)Overload capability (constant torque) | 150 % for 60 s, 200 % for 3 s (A … F); 136 % for 57 s, 160 % for 3 s (FX, GX) |
| Overload capability (variable torque)Overload capability (variable torque) | 110 % for 60 s, 140 % for 3 s (A … F); 110 % for 59 s, 150 % for 1 s (FX, GX) |
| Operating temperatureOperating temperature | -10 … +50 (CT) or -10 … +40 (VT) for A … F; 0 … +40 for FX, GX °C |
| Frame sizesFrame sizes | A, B, C, D, E, F, FX, GX |
| Control methodControl method | V/f (linear, FCC, parabolic, multi-point, textile); sensorless vector, sensorless vector torque, vector with encoder (speed and torque) |
|---|---|
| Pulse frequencyPulse frequency | 2 … 16 (A … F, 2 kHz steps, standard 4 kHz); 2 … 4 (FX, GX) kHz |
| BrakingBraking | DC braking, compound braking; dynamic braking with built-in chopper (A … F) or external chopper (FX, GX) |
| Inputs and outputsInputs and outputs | 6 digital in, 2 analog in, 3 relay out, 2 analog out (0 … 20 mA) |
| FunctionsFunctions | PID technology controller, free function blocks, kinetic buffering, positioning ramp-down, DC link voltage controller |
| Serial interfaceSerial interface | RS-485 (USS), RS-232 optional |
|---|---|
| Fieldbus option moduleFieldbus option module | PROFIBUS DP |
| CANopen option moduleCANopen option module | CANopen |
| DeviceNet option moduleDeviceNet option module | DeviceNet |
| Commissioning softwareCommissioning software | DriveMonitor, STARTER |
|---|---|
| Operator panelsOperator panels | SDP (standard), BOP, AOP (options) |
| Encoder evaluationEncoder evaluation | Pulse encoder evaluation module (option) |
| Delivery release (article 6SE6440-2UD21-5AA1)Delivery release (article 6SE6440-2UD21-5AA1) | 2002-03-01 |
|---|---|
| Phase-out announcedPhase-out announced | 2017-10-01 |
| Product cancellationProduct cancellation | 2019-10-01 |
| Current status in SiePortalCurrent status in SiePortal | Prod. Cancellation, spare part |
Basic Operator Panel (BOP), 6SE6400-0BP00-0AA1
MICROMASTER 4 basic operator panel; per Siemens' migration guide its G120 counterpart is the BOP-2. 'Prod. Cancellation' from 2019
Advanced Operator Panel (AOP), 6SE6400-0AP00-0AA1
Advanced operator panel; it has no direct counterpart in the G120, which uses the BOP-2 or IOP instead (per the migration guide)
PROFIBUS module, 6SE6400-1PB00-0AA0
Optional PROFIBUS DP communication module; the guide maps it to the CU240E-2 DP control unit. 'Prod. Cancellation' from 2019
CANopen module, 6SE6400-1CB00-0AA0
Optional CANopen module; the guide maps it to the CU250S-2 CAN, which is itself in the phase-out announcement stage. 'Prod. Cancellation' from 2019
DeviceNet module, 6SE6400-1DN00-0AA0
Optional DeviceNet module; it has no direct replacement in the G120. 'Prod. Cancellation' from 2019
Pulse encoder evaluation module, 6SE6400-0EN00-0AA0
Incremental encoder evaluation module (TTL/HTL) for vector control with an encoder; the guide maps it to the CU250S-2. 'Prod. Cancellation' from 2019
PC to inverter connection kit, 6SE6400-1PC00-0AA0
Kit to connect a PC to the converter for DriveMonitor and STARTER; 'Prod. Cancellation' from 2019
BOP/AOP door mounting kit, 6SE6400-0PM00-0AA0
Kit for mounting the operator panel in the cabinet door for a single converter; 'Prod. Cancellation' from 2019
Braking resistors, EMC filters, line commutating choke, output choke, LC filter, gland plate
Device-dependent options per the Options chapter of the operating instructions: for frame sizes A to F Class A and B EMC filters, a low-leakage Class B filter, line commutating choke, output choke, LC filter and gland plate; for FX and GX line commutating choke, Class A EMC filter and LC filter. An external braking resistor connects to the built-in chopper (A to F) or to an external chopper (FX, GX). With an output choke or LC filter only a 4 kHz pulse frequency is permitted
Manual
Migration of MICROMASTER MM440 to SINAMICS G120 (firmware V4.6 or later), Siemens FAQ
Migration of MICROMASTER MM440 to SINAMICS G120 (firmware V4.6 or later), Siemens FAQ
Language: English · Version V1.0.1, 08/2013
Other
Alternative SINAMICS G products for MICROMASTER 4 (Siemens support entry)
Alternative SINAMICS G products for MICROMASTER 4 (Siemens support entry)
Language: English · Version 02/2020
Brochure
Simply switch over now from MICROMASTER to SINAMICS (brochure)
Simply switch over now from MICROMASTER to SINAMICS (brochure)
Language: English · Version 07/2022
Manual
MICROMASTER 440 0.12 kW - 250 kW Operating Instructions
MICROMASTER 440 0.12 kW - 250 kW Operating Instructions
Language: English · Version 10/06
Manual
MICROMASTER 440 0.12 kW - 250 kW Operating Instructions (Compact)
MICROMASTER 440 0.12 kW - 250 kW Operating Instructions (Compact)
Language: English · Version 10/06
Manual
MICROMASTER 440 Parameter List
MICROMASTER 440 Parameter List
Language: English · Version 01/06
Data sheet
Data sheet for article 6SE6440-2UD21-5AA1 (generated by the Siemens Industry Mall)
Data sheet for article 6SE6440-2UD21-5AA1 (generated by the Siemens Industry Mall)
Language: English
Only as a spare part. For every MICROMASTER 440 article number we checked, Siemens records 'Prod. Cancellation' from 1 October 2019 and calls the item a 'spare part'; support entry 109746454 also says the product can still be ordered although the type is cancelled. We found no Siemens statement of when that stops. Availability and lead time are confirmed on enquiry, and for a new design or for stocking it is better to look at the SINAMICS replacement first.
The modular SINAMICS G120: a PM240-2 power module and a control unit. Per Siemens' migration guide: an MM440 without a communication or encoder module goes to the CU240E-2, with a PROFIBUS module to the CU240E-2 DP, and with an encoder module to the CU250S-2. Siemens' own example: 6SE6440-2UC25-5CA1 (22 A) with the PROFIBUS module 6SE6400-1PB00-0AA0 to 6SL3210-1PC22-8UL0 with 6SL3244-0BB12-1PA1; both codes are 'Active Product' in SiePortal. For low-I/O applications without an encoder in the 0.55 kW to 18.5 kW range, Siemens also suggests the SINAMICS G120C.
Per Siemens' migration guide: a direct migration of the project is not possible and the drive must be recommissioned with the BOP-2, the IOP or STARTER. The terminal designations are the same as on the MM440, but their arrangement is compared in the guide. VT has been renamed LO and CT has been renamed HO. The AOP panel has no direct counterpart, DriveMonitor is not supported and there is no direct replacement for the DeviceNet module. The guide is written for firmware V4.6 and later and its cover is dated August 2013.
Encoder: the CU250S-2 (the PN and DP versions are 'Active Product' in SiePortal). CANopen: Siemens' guide names the CU250S-2 CAN, but that code (6SL3246-0BA22-1CA0) has been at 'P.M400' (phase-out announcement) in SiePortal since 1 October 2025, so for a new unit the communication architecture is worth reviewing. DeviceNet: there is no direct replacement; Siemens suggests a gateway or a move to EtherNet/IP with a PROFINET control unit.
From the order number on the rating plate: 6SE6420- for the MM420, 6SE6430- for the MM430 and 6SE6440- for the MM440. If the plate is unreadable: the MM440 goes from 0.12 to 250 kW, has six digital inputs, two analog inputs and three relays, has constant-torque (CT) ratings and vector control and accepts an encoder module. The MM420 stops at 11 kW and has three digital inputs; the MM430 starts at 7.5 kW, is made for pumps and fans and has no vector control.
MICROMASTER 420
Basic Siemens MICROMASTER 4 converter from 0.12 kW to 11 kW with V/f control; Siemens has cancelled it and points to SINAMICS G120C as the replacement
اینورتر فشار ضعیف
Has a successor
MICROMASTER 430
Siemens MICROMASTER 4 converter for pumps and fans, from 7.5 kW to 250 kW; Siemens has cancelled it and points to SINAMICS G120X as the replacement
اینورتر فشار ضعیف
Has a successor
SINAMICS G120
Modular Siemens frequency converter from 0.55 kW to 250 kW, with a separate control unit and power module and integrated safety functions up to SIL 2
اینورتر فشار ضعیف
SINAMICS G120C
Compact one-piece Siemens frequency converter from 0.55 kW to 132 kW for a three-phase 380 V to 480 V supply; control and power sections in one housing, with an integrated STO safety function
اینورتر فشار ضعیف
Send your order code or requirement; after a technical review we give you the price and delivery time.