Siemens 6SL3121-1TE21-0AA3 SINAMICS S120 9 A Single Motor Module
This externally cooled 9 A AA3 single-axis module is cancelled, with Siemens identifying 6SL3121-1TE21-0AA4 as its substitute.
Product Profile
Siemens 6SL3121-1TE21-0AA3 is a SINAMICS S120 Single Motor Module for one 9 A motor output. The booksize module uses external air cooling, accepts the 600 V DC nominal link and supplies a 400 V three-phase motor side. Siemens lists product cancellation effective 23 September 2014 and identifies 6SL3121-1TE21-0AA4 as the substitute. A substitute decision still requires firmware, mechanics, connector, motor and Safety Integrated review rather than an order-number-only swap.
Technical Data
| Manufacturer | Siemens |
|---|---|
| Article Number | 6SL3121-1TE21-0AA3 |
| Product Family | SINAMICS S120 |
| Product Type | Single Motor Module |
| Construction | Booksize |
| Cooling | External air cooling |
| Nominal DC Input | 600 V DC |
| Motor Output | 400 V, 3-phase AC |
| Rated Output Current | 9 A |
| Axis Count | 1 motor output |
| Communication | DRIVE-CLiQ cable included |
| Lifecycle | PM410 Product cancellation |
| Cancellation Effective Date | 23 September 2014 |
| Siemens Substitute | 6SL3121-1TE21-0AA4 |
System Role
Drive-System Functions
- Powers one 9 A motor axis in an externally cooled booksize arrangement.
- Keeps power-section heat management separate from internally cooled 6SL3120 modules.
- Uses optimized pulse patterns for the documented generation.
- Provides DRIVE-CLiQ communication and identification.
- Supports extended Safety Integrated functions in a validated system.
- Has an official Siemens substitute identified for lifecycle planning.
Exact Product Identity
- Manufacturer: Siemens
- Model: 6SL3121-1TE21-0AA3
- Product Type: SINAMICS S120 externally air-cooled Single Motor Module
- Status: Cancelled product with substitute
Compatibility
- Review 6SL3121-1TE21-0AA4 as the Siemens-identified substitute, not as an unchecked drop-in replacement.
- Compare firmware, DRIVE-CLiQ behavior, connectors, mechanics and external cooling.
- Restore motor, encoder, current-limit and control-loop data from the approved project.
- Revalidate Safety Integrated functions and acceptance records after migration.
- Keep the 9 A single-axis identity separate from 5 A or double-motor variants with similar prefixes.
Applications
- Legacy externally cooled S120 axes using the exact 9 A AA3 article.
- Lifecycle planning where Siemens substitute 6SL3121-1TE21-0AA4 is being evaluated.
- Machine service requiring one 9 A booksize motor output.
- Cabinets that preserve the original external-air-cooling concept.
- Migration projects with documented hardware, firmware and safety acceptance.
FAQ
Which substitute does Siemens identify for 6SL3121-1TE21-0AA3?
Siemens identifies 6SL3121-1TE21-0AA4 as the substitute.
When was the 9 A AA3 article cancelled?
The Industry Mall lifecycle date is 23 September 2014.
Does 6SL3121-1TE21-0AA3 control two motors?
No. It is a Single Motor Module with one 9 A output.
What cooling method distinguishes the 6SL3121 unit?
It uses external air cooling.
May the AA4 substitute be installed without recommissioning?
No. Check firmware, mechanics, cooling, connectors, project data and Safety Integrated functions.
How does this module differ from 6SL3121-1TE15-0AA4?
This AA3 article is rated 9 A and has an identified AA4 substitute; the TE15 article is rated 5 A and has a different cancellation history.
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