TFM 3.1-050-300-W1-115 Bosch Rexroth Indramat
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MPN: R911234796
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The Bosch Rexroth Indramat TFM 3.1-050-300-W1-115 is part of the TFM Variable Frequency Drives series and features a current rating of 50 Amps with a DC bus voltage of 300 VDC. This unit uses internal air cooling via a built-in blower operating at 115 VAC and 50/60 Hz, and is protected to an IP20 rating.
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Product Description:
The TFM 3.1-050-300-W1-115 is a variable frequency drive developed by Bosch Rexroth Indramat for the TFM Variable Frequency Drives series. The unit converts fixed-frequency mains power into a regulated output that lets automation controllers adjust the speed of standard induction motors, making it suitable for conveyors, pumps, and material-handling axes. Integrated power electronics, a dedicated blower, and front-panel terminals are combined in a single cabinet-mounted package. This layout keeps control and power connections accessible while allowing the drive to serve as the main motor controller for medium-current applications in general factory automation lines. It also supports steady motor speed control during process changes and routine start-stop duty.
On the power side, the drive’s DC link is stabilized at 300 VDC, providing the intermediate voltage that the inverter stage modulates into variable-frequency three-phase output. Motor phase current can reach 50 A, which indicates the maximum continuous load the power semiconductors and bus bars can handle without thermal derating. Control wiring is grouped on a 12-pin bus connector that carries enable signals, fault contacts, and reference inputs to PLCs. The built-in cooling fan is supplied with 115 VAC and operates at 50/60 Hz, so a standard single-phase source can support internal airflow. These connections allow the drive to exchange command and status signals with surrounding control equipment in a straightforward way.
Air is moved directly across the heat sink, so the unit uses internal air cooling and does not require external ducting. The drive can be installed at elevations up to 1000 m without adjustment, which supports full current delivery in most plant locations. An IP20 protection rating provides finger-safe openings while still allowing airflow from the blower. The enclosure is intended for mounting inside a control cabinet, where surrounding space can support steady circulation through the heat sink and power section. The blower-driven airflow path helps remove heat from the inverter section during continuous operation.
Frequently Asked Questions about TFM 3.1-050-300-W1-115:
Q: What is the current rating of the TFM 3.1-050-300-W1-115 drive?
A: The TFM 3.1-050-300-W1-115 variable frequency drive operates with a current rating of 50 A.
Q: What cooling method is used in the TFM 3.1-050-300-W1-115?
A: This model features an internal air cooling system with a built-in blower.
Q: What is the blower voltage required for the TFM 3.1-050-300-W1-115?
A: The TFM 3.1-050-300-W1-115 is designed for use with a blower voltage of 115 VAC.
Q: What is the IP protection rating of the TFM 3.1-050-300-W1-115?
A: It has a protection rating of IP20, which limits exposure to solid objects but does not provide water protection.
Q: What DC bus voltage does the TFM 3.1-050-300-W1-115 support?
A: The TFM 3.1-050-300-W1-115 operates with a DC bus voltage of 300 VDC.
