Shipping information

Do you require same-day delivery or express shipping with a defined delivery time for this item?
Please contact us!

Product description

Siemens 6SE7021-8TB30 is a SIMOVERT SC Compact Unit within the MASTERDRIVES-6SE70 family. The original module is an IP20 Inverter Compact Unit designed for a 510 to 620 V DC link and the 17.5-A current class. Siemens 6SE7021-8TB30 differs clearly from the 6SE7021-8TP50/70 Motion Control variants rated for 510 to 650 V DC while remaining part of the same 6SE70 Simovert environment. The Siemens spare list identifies 6SE7021-8TB30 as a Compact Inverter in frame size FSA and separately assigns 9MC-1 replacement type 9MC3156-6RF38-2DN0. That replacement entry has its own ratings of 510 to 720 V DC and 18 A and is identified as an inverter. Supplier data also describes the original MLFB as a SIMOVERT SC Compact Unit with IP20 protection and a 510 to 620 V DC range. For replacement procurement, the type number, SC assignment, DC-link range, 17.5 A rating and Compact Inverter construction are the decisive characteristics. VC, SC and Motion Control units are not automatically interchangeable even when they appear similar. Frame size FSA, the 17.5-A class and rated current provide useful filters, but the complete MLFB remains essential. Siemens 6SE7021-8TB30 prevents confusion with 8TB20, 8TB31 and TP variants and identifies the precise 6SE70 power unit required for an existing MASTERDRIVES cabinet. The 17.5-A source class should remain linked to the complete MLFB.

Siemens 6SE7021-8TB30

Specifications

Manufacturer Siemens
Product series SIMOVERT MASTERDRIVES
Sub-series SIMOVERT SC
Type code 6SE7021-8TB30
Product type Inverter Compact Unit
Construction Compact Inverter
Degree of protection IP20
Supply voltage 510-620 V DC
Rated current 17.5 A
Frame size FSA
9MC-1 replacement type 9MC3156-6RF38-2DN0
9MC-1 replacement voltage 510-720 V DC
9MC-1 replacement rated current 18 A
9MC-1 replacement device type Inverter
Technical family 6SE70 Compact Inverter
Control cabinet with PLC modules and automation components
Machine downtime in a production environment

Machine downtime?

Faster delivery

Is your machine down and do you require particularly fast delivery? Tell us directly. We will do everything possible to provide a quotation with the fastest available delivery and find a solution that matches your schedule.

Our highest priority is to keep your production processes running. Rely on our expertise and flexible service to minimise machine downtime effectively.

Contact us now!

Product safety

Manufacturer / EU responsible person

FAQ

Frequently asked questions

Contact us
Is there a warranty?

Yes. We provide a 14-day functional warranty for used items. The component must be functional on arrival, and the warranty applies only while the warranty seal remains undamaged. If a fault occurs within 14 calendar days, please contact us in writing. Depending on availability, we will either provide a replacement or refund the full purchase price after the item has been returned. Further details are set out in the terms and conditions supplied with our quotation.

How quickly do you ship, and which shipping options are available?

We normally dispatch available items immediately and, in many cases, on the same working day. For urgent requirements or machine downtime, we will identify the fastest suitable option and can confirm a specific delivery window on request. Express shipping and collection from our premises are also possible by arrangement. We ship worldwide using reliable parcel and freight carriers; freight shipments may require additional preparation to ensure safe delivery.

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.

Receive a quotation by email

Request price

Complete the form with your enquiry. We will respond with price, availability and delivery time.