VFD vs Servo Drive: Key Differences
A side-by-side comparison of VFD and servo drive motor type, feedback, dynamic response, overload rating, cost, and applications for industrial engineers.
- Part number
- 6SL3120-1TE21-8AC0
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· From Türkiye
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SINAMICS S120Siemens 6SL3120-1TE21-8AC0 SINAMICS S120 Single Motor Module 18A Booksize C-Type Drive Module
Siemens SINAMICS S120 Single Motor Module, 18A rated, Booksize C-Type, DRIVE-CLiQ.
Description
About the 6SL3120-1TE21-8AC0
About the 6SL3120-1TE21-8AC0
The Siemens 6SL3120-1TE21-8AC0 is a SINAMICS S120 Single Motor Module in Booksize C-Type frame, converting a 510-720 V DC link into a 3 AC 400 V output rated at 18.0 A (IN), with a base-load current IH of 15.3 A and a peak Imax of 36.0 A. It ships with an integrated DRIVE-CLiQ cable and supports the extended Safety Integrated functions.
Selection Notes
The 18.0 A rated current (IN) with a 15.3 A base-load rating (IH) positions this module for single-axis loads around 8.2-9.7 kW, depending on whether the IH or IN basis applies to the duty cycle. Its 36.0 A Imax gives roughly double the rated-current headroom for short-term peaks such as machine start-up. Booksize C-Type frame and internal air cooling mean it shares the DC link and cooling arrangement of other Booksize S120 modules on the same infeed, and its extended Safety Integrated support lets this axis use Safe Torque Off and related safety functions without an external safety relay.
Applications
Fits single-axis SINAMICS S120 booksize configurations — servo or vector-controlled motor axes on machine tools, printing or packaging lines — where the DC link is shared across several motor modules fed from a common Line Module.
Specification
Full specification
Rated data 13
| DC link voltage | DC 510 ... 720 V |
|---|---|
| Electronics power supply | DC 24 V -15 % / +20 % |
| Current demand, max. | 0.75 A |
| DC-link current Id | 22.0 A |
| Output current: Rated value IN | 18.0 A |
| Output current: Base load current IH | 15.3 A |
| Output current: For S6 duty (40%) IS6 | 24.0 A |
| Output current: Imax | 36.0 A |
| Type rating: Based on IN | 9.7 kW |
| Type rating: Based on IH | 8.2 kW |
| Current carrying capacity: DC link busbars | 100 A |
| Current carrying capacity: 24 V busbars | 20 A |
| DC link capacitance | 220 µF |
Ambient conditions 4
| Installation altitude (without derating) | 1,000 m (3,281 ft) |
|---|---|
| Cooling 8) | Internal air cooling |
| Cooling air requirement | 0.009 m³/s |
| Ambient temperature: During operation | 0 ... 40 °C (32 ... 104 °F) |
Connections 4
| Motor end: Version | connector (X1) |
|---|---|
| PE connection | M5 screw |
| Max. motor cable length: Shielded | 70 m (230 ft) |
| Max. motor cable length: Unshielded | 100 m (328 ft) |
Show all 41 specifications ↓ Show less ↑20 more values in Identification, Standards, Mechanical data, General tech. specifications, Logistics.
Identification 6
| Part number | 6SL3120-1TE21-8AC0 |
|---|---|
| Brand | Siemens |
| Condition | New, factory sealed |
| Source | Siemens and its authorised distributors |
| Warranty | Manufacturer warranty |
| EAN | 4034106439613 |
Standards 2
| Compliance with standards | CE, cULus |
|---|---|
| Safety Integrated | SIL 2 acc. to IEC 61508, PL d acc. to EN ISO 13849-1, Category 3 acc. to EN ISO |
Mechanical data 6
| Line side: Width | 50.00 mm (1.97 in) |
|---|---|
| Line side: Height | 380.00 mm (14.96 in) |
| Line side: Depth | 270.00 mm (10.63 in) |
| Line side: Degree of protection | IP20 / UL open type |
| Line side: Type of construction | Booksize |
| Line side: Net weight | 4.6 kg (10.14 lb) |
General tech. specifications 2
| Sound pressure level (1m) | 60.0 dB |
|---|---|
| Page 1 of 1 | Generated Sun Nov 1 04:03:07 CET 2026 |
Logistics 4
| Shipping weight | 5.1 kg |
|---|---|
| Ships from | Türkiye |
| Dispatch | 13 Nov |
| Stock | Low stock |
Source: manufacturer data · Last verified: 01 Nov 2026
Documents
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Quick answers
Questions about the 6SL3120-1TE21-8AC0
What is the rated current of 6SL3120-1TE21-8AC0?
The rated current of 6SL3120-1TE21-8AC0 is 18.0 A.
Which supply voltage is 6SL3120-1TE21-8AC0 rated for?
The rated operational voltage of 6SL3120-1TE21-8AC0 is 400 V AC.
What motor power is 6SL3120-1TE21-8AC0 rated for?
The rated motor power of 6SL3120-1TE21-8AC0 is 9.7 kW.
What is the HS code of 6SL3120-1TE21-8AC0 for customs?
The tariff (HS) code on file for 6SL3120-1TE21-8AC0 is 85044087.
What is the EAN of 6SL3120-1TE21-8AC0?
The EAN (GTIN) of 6SL3120-1TE21-8AC0 is 4034106439613.
Where does 6SL3120-1TE21-8AC0 ship from, and how fast?
6SL3120-1TE21-8AC0 ships from Türkiye. Shipping calculated at checkout · import duties and taxes paid on arrival. Stock items are dispatched within 1–2 business days.
Guides
Guides for servo drives
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Series
Siemens SINAMICS S120
- Brand
- Siemens
- Series
- SINAMICS S120
