Siemens 6SL3120-1TE21-8AC0 SINAMICS S120 18 A C-Type Motor Module
Active 18 A C-type module designed for up to twofold overload with a 36 A peak-current value.
01Technical Summary
Siemens 6SL3120-1TE21-8AC0 is the C-type 18 A SINAMICS S120 Single Motor Module for applications whose overload demand fits a 36 A peak-current value. It provides 15.3 A base-load current and 24 A S6 current while occupying a 50 mm-wide booksize housing. This C-type designation is the key selection difference from 6SL3120-1TE21-8AD0: both share the 18 A rated value, but the D-type article is documented for 54 A peak current. The C-type module is therefore selected by the actual duty profile, not by continuous current alone.
02Specifications
| Manufacturer | Siemens |
|---|---|
| Article Number | 6SL3120-1TE21-8AC0 |
| Product Family | SINAMICS S120 |
| Construction | Booksize C-type, internal air cooling |
| DC Link Voltage | 510 to 720 V DC |
| Electronics Supply | 24 V DC, -15% / +20% |
| Rated / Base-Load Current | 18.0 A / 15.3 A |
| S6 Current at 40% Duty | 24.0 A |
| Peak Current Imax | 36.0 A |
| Type Rating at IN / IH | 9.7 kW / 8.2 kW |
| Rated Pulse Frequency | 4 kHz |
| Motor Cable Length | 70 m shielded; 100 m unshielded |
| Cooling-Air Requirement | 0.009 m³/s |
| Power Loss, Typical / Maximum | 0.14 kW / 0.19 kW |
| Protection | IP20 / UL open type |
| Safety Integrated | SIL 2; PL d; Category 3 |
03Features
Operating Characteristics
- Implements the C-type overload profile with a 36 A peak-current value.
- Delivers 18 A rated, 15.3 A base-load and 24 A S6 output-current values.
- Supports optimized pulse patterns and extended Safety Integrated functions.
- Provides 650 Hz servo, 600 Hz V/f and 300 Hz vector-control frequency values under the documented conditions.
- Uses internal fan cooling in a 50 mm booksize enclosure.
- Includes a DRIVE-CLiQ cable for integration with the SINAMICS S120 control system.
Product Identity
- Manufacturer: Siemens
- Model: 6SL3120-1TE21-8AC0
- Product Type: SINAMICS S120 booksize C-type Single Motor Module
- Status: Active product
04Compatibility
- Select the C-type only when the axis duty and acceleration profile fit the 36 A peak-current limit.
- Do not substitute the 8AD0 merely from the common 18 A nameplate rating; validate the required overload class.
- Operate from a supported 510 to 720 V DC link with the specified 24 V electronics supply.
- Use the X1 motor connector, M5 PE connection and conductors from 1.5 to 6 mm².
- Confirm firmware, motor, encoder, DRIVE-CLiQ arrangement and Safety Integrated commissioning data.
- Maintain 0.009 m³/s internal cooling airflow and observe the 0 to 40 °C non-derated operating range.
05Replacement
- Siemens lists 6SL3120-1TE21-8AC0 as an active product.
- The article provides the C-type, twofold-overload option in the current 18 A booksize range.
- Use 6SL3120-1TE21-8AD0 only when the D-type threefold-overload profile is required and the complete application is verified.
- When replacing an older AA module, evaluate the official adapter-cable mapping and the different connector technology.
- Validate the configured power-section code, current limits, drive tuning, thermal behavior and all safety functions after installation.
06FAQ
What does C-type mean for the 18 A 8AC0 module?
For this article, the C-type selection provides a 36 A peak-current value, corresponding to up to twofold overload.
Which 18 A article provides the higher 54 A peak value?
The D-type 6SL3120-1TE21-8AD0 provides the 54 A peak-current value.
How much DC-link current is used for external DC-connection sizing?
The Siemens data sheet lists 22.0 A DC-link current.
What electrical safety classifications are documented?
Safety Integrated is listed to SIL 2, PL d and Category 3 within a correctly engineered SINAMICS S120 system.
Which current values should be entered in an engineering comparison?
Use 18.0 A rated, 15.3 A base-load, 24.0 A S6 and 36.0 A peak current for this exact C-type article.
Is the 8AC0 a current or legacy spare-product design?
Siemens lists 6SL3120-1TE21-8AC0 as an active product.
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