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Siemens G85139-H1750-A Braking Resistor for MICROMASTER Vector

Siemens G85139-H1750-A Braking Resistor for MICROMASTER Vector Inverters.

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ManufacturerSiemens

Part numberG85139-H1750-A

Ambient operating temperature 0 to 50°C

Storage/transport temperature -30 to +85°C

Degree of protection IP54

Humidity 0 to 95% (non-condensing)

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Enables rapid deceleration Dissipates excess energy from inverter Extruded aluminum case for heat dissipation IP54 protection rating Designed for MICROMASTER Vector inverters

Product description

The Siemens G85139-H1750-A is a braking resistor specifically designed for use with MICROMASTER Vector range of inverters. This component is crucial for enabling rapid deceleration of high inertia loads in industrial applications.

When a motor and load are decelerating, excess energy is returned to the inverter. The G85139-H1750-A dissipates this excess energy, preventing it from causing an overvoltage trip in the inverter. It features an extruded aluminum case for efficient heat dissipation and is designed for vertical installation with adequate clearance for convection cooling.

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Technical specifications

Ambient operating temperature	0 to 50°C
Storage/transport temperature	-30 to +85°C
Degree of protection	IP54
Humidity	0 to 95% (non-condensing)
Installation	Vertical mounting on metal surface
Fixing holes	2 x 5.5 mm

Common applications

Industrial motor control

Variable speed drives

Material handling systems

Machine tools

Pump and fan control

Compatible systems

MICROMASTER Vector inverters

Also known as

Siemens MICROMASTER Braking Resistor G85139-H1750-A Resistor Siemens Inverter Braking Component

Replaces / compatible with

This braking resistor is designed as a component for the Siemens MICROMASTER Vector inverter series. It is not a direct replacement for another specific part number but is an accessory for the inverter system.

Technical note

Expert tip

Ensure adequate clearance (at least 100mm above and below) for convection cooling when installing the G85139-H1750-A, as it gets hot during operation.

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Frequently asked questions

What is the purpose of the Siemens G85139-H1750-A braking resistor?

The Siemens G85139-H1750-A braking resistor is used with MICROMASTER Vector inverters to dissipate excess energy generated during motor and load deceleration. This prevents overvoltage within the inverter's DC link capacitors, ensuring stable operation and preventing trips.