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Product description

The Siemens 6RA2178-6DS20-0 belongs to the SIMOREG 6RA21 series and is a K converter unit for variable-speed DC drives. This exact version is designed for single-quadrant operation and uses a six-pulse B6C bridge circuit. On the mains side, the unit is connected to three-phase 380 V AC. For the armature circuit, the variant description specifies 460 V DC and 300 A. This makes the unit suitable for powerful DC machines in older production systems, rolling mills, conveyor systems or comparable industrial drive applications, provided that the existing configuration matches this exact version. The additional unit designation MRE-GCEF and version code 6S20 belong to the documented variant assignment. The unit weight is specified as approximately 27 kg. Siemens now lists the product family as discontinued, making the complete order number particularly important when sourcing a replacement. The 6RA2178-6DS20-0 must not be selected solely by its series or by comparison with similar converters, because neighboring 6RA21 variants differ in DC voltage, current rating and unit version. The designation D460/300 summarizes the documented output ratings of this specific variant. Before installation, the 380-V mains supply, 460-V-DC output, 300-A rating, single-quadrant operation, B6C circuit and the machine's connection and control concept must therefore be checked. Existing terminal assignments, fuses, cooling and mechanical installation space must also be verified against the plant documentation. This used converter is particularly suitable as a like-for-like replacement in existing systems where the DC machine, wiring and control structure are to remain unchanged. For reliable identification, the nameplate, all connection data and the complete 6RA2178-6DS20-0 number remain decisive.

Siemens 6RA2178-6DS20-0

Specifications

Manufacturer Siemens
Product series SIMOREG 6RA21
Manufacturer / order / identification number 6RA2178-6DS20-0
Device type SIMOREG K converter unit
Function Converter for the DC armature circuit
Operating mode Single-quadrant operation
Circuit type B6C bridge circuit
Mains connection Three-phase
Supply voltage 380 V AC
Output voltage 460 V DC
Rated current 300 A DC
Unit designation MRE-GCEF
Version code 6S20
Weight approx. 27 kg
Product status Discontinued series
Control cabinet with PLC modules and automation components
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FAQ

Frequently asked questions

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What are the power ratings of the Siemens 6RA2178-6DS20-0?

This exact version operates from three-phase 380 V AC and supplies 460 V DC at 300 A for the DC armature circuit.

What must be considered when replacing a SIMOREG 6RA21?

The order number, single-quadrant operation, B6C circuit, mains and output ratings, connection diagram, cooling, fuses and plant configuration must match the existing machine.

Is there a guarantee?

Yes, we provide a 14-day functional guarantee for used items. This means the component must be operational when received.

Please note that the guarantee only applies when the warranty seal is undamaged.

If a defect occurs within 14 calendar days, please contact us in writing. Subject to availability, we will provide a replacement or refund the full purchase price after return.

Further details are provided in the terms and conditions supplied with your quotation.

How quickly do you dispatch and which shipping options are available?

We generally dispatch immediately - in many cases on the same working day. For particularly urgent requirements or machine downtime, we find a suitable solution as quickly as possible and provide a specific delivery window on request.

Express shipping or collection from our premises is also possible, depending on the situation. State your requirements during the ordering process or contact us directly.

We ship worldwide and work with reliable shipping partners, from parcel services to freight forwarding. Freight shipments normally require some preparation so the goods arrive safely and undamaged.

Which payment methods are available?

Payment is normally made by bank transfer against invoice. Payment is due within 10 calendar days of receiving the goods.

As a rule, we offer purchase on account for all customers. In individual cases, such as new customers or particularly high-value components, we may agree advance payment. This decision is made individually and communicated transparently.

Can we return items if they were ordered incorrectly?

Because we sell exclusively to business customers (B2B), there is no general right of return and no consumer right of withdrawal.

Please note that returns of functioning goods are generally excluded. In justified exceptional cases, we can assess an individual solution, but this is not the standard procedure.

Is there a discount when ordering several items?

For larger order quantities or several items of one type, we can offer individual discounts.

Simply send us a quick enquiry - we check availability and will gladly prepare a tailored quotation with quantity pricing.

Do you also purchase industrial spare parts?

Yes, we also purchase automation components, such as frequency inverters, PLC assemblies, panels, servo motors and CPUs. Components from Siemens, Lenze, Schneider Electric, Control Techniques or Heidenhain are especially sought after, and other brands are also possible.

The process is straightforward: email us an inventory list or overview photos at info@reha-industriekomponenten.de. We calculate a market-based purchase price and send you an offer.

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