SIEMENS 6SL3351-6GH35-8AB3 Power Module | Replacement, Equivalent & Selection Guide
The SIEMENS 6SL3351-6GH35-8AB3 is a high-performance Power Module from the SINAMICS S120 series, designed for demanding servo and vector drive applications in industrial automation. This guide covers technical specifications, compatible replacements, equivalent models, and selection criteria to help engineers and procurement teams make informed decisions.
Technical Specifications
- Manufacturer: Siemens AG
- Series: SINAMICS S120
- Part Number: 6SL3351-6GH35-8AB3
- Type: Power Module (Booksize format)
- Rated Output Power: 55 kW
- Input Voltage: 3-phase AC 380–480 V (±10%)
- Output Current: 105 A (continuous)
- Cooling: Forced air cooling (internal fan)
- Protection Class: IP20
- Communication Interface: DRIVE-CLiQ
- Ambient Temperature: 0 °C to +40 °C (derating above 40 °C)
- Standards: CE, UL, cUL
- Weight: approx. 10.5 kg
Compatible Replacement & Equivalent Models
The following models are functionally compatible or serve as direct/near-direct replacements for the 6SL3351-6GH35-8AB3 in most SINAMICS S120 system configurations:
- 6SL3120-1TE32-5AA3 – SINAMICS S120 Single Motor Module 25A (for lower power applications)
- 6SL3120-1TE33-8AA3 – SINAMICS S120 Single Motor Module 38A
- 6SL3120-1TE35-0AA3 – SINAMICS S120 Single Motor Module 50A (closest equivalent)
- 6SL3120-2TE35-0AA0 – SINAMICS S120 Double Motor Module 50A+50A
- 6SL3351-6GH35-8AA3 – Previous revision of the same module (A3→A3 revision check required)
Note: Always verify firmware version, DRIVE-CLiQ compatibility, and Control Unit pairing before substitution. Contact Konmask technical support for confirmation.
Why Choose the Original Model
- ✅ Guaranteed OEM compatibility with SINAMICS S120 Control Units (CU320-2, CU310-2)
- ✅ Full DRIVE-CLiQ plug-and-play — automatic parameter recognition
- ✅ Siemens factory warranty and traceable serial number
- ✅ Optimized thermal management for 24/7 continuous duty cycles
- ✅ Certified for safety functions (STO, SS1, SBC per IEC 61800-5-2)
Typical Applications
- CNC machine tool spindle and feed axis drives
- Printing and packaging machinery
- Textile and winding equipment
- Conveyor and material handling systems
- Plastics injection molding machines
- Robotics and multi-axis servo systems
System Compatibility
- Control Units: CU320-2 DP, CU320-2 PN, CU310-2 DP, CU310-2 PN
- Line Modules: Active Line Module (ALM), Smart Line Module (SLM), Basic Line Module (BLM)
- Motor Types: Siemens 1FK7, 1FT7, 1PH8 series; third-party servo/induction motors
- Fieldbus: PROFIBUS DP, PROFINET IO (via Control Unit)
- Engineering Software: STARTER, SINAMICS Startdrive (TIA Portal V14+)
Selection Guide
Use the following criteria to select the correct Power Module for your application:
- Step 1 – Determine motor rated current: Select a module with continuous output current ≥ motor rated current × 1.1 safety factor.
- Step 2 – Check supply voltage: Confirm 3-phase 380–480 V AC availability at the cabinet.
- Step 3 – Identify format: Booksize (6SL335x) vs. Chassis (6SL321x) — booksize suits compact panel installations.
- Step 4 – Verify Control Unit: Ensure CU firmware ≥ V4.7 for full feature support with this module.
- Step 5 – Safety requirements: If STO/SS1 is required, confirm the module revision supports integrated safety (suffix AB3 or later).
- Step 6 – Cooling: Confirm adequate airflow (min. 200 m³/h) in the control cabinet for IP20 forced-air modules.
Quality Assurance & Sourcing
- 🔍 100% authenticity verification — all units sourced from authorized Siemens distributors or certified surplus channels
- 📦 Original packaging with factory labels and holographic seals where applicable
- 🧪 Pre-shipment functional testing available on request
- 📋 Full traceability: batch number, date code, and country of origin documentation provided
- 🌍 Global shipping with DHL Express, FedEx, and UPS — typical lead time 3–7 business days
How to Order
- Confirm part number: 6SL3351-6GH35-8AB3
- Specify quantity and required delivery date
- Request a quote via support@konmask.com or WhatsApp +0086 19859288691
- Receive proforma invoice within 24 hours
- Payment via T/T, PayPal, or credit card — shipment within 1–2 business days after clearance
Replacement & Compatibility FAQ
Q: Can I replace 6SL3351-6GH35-8AB3 with a 6SL3120-1TE35-0AA3?
A: In most cases yes, but the 6SL3120 series uses a different form factor (Motor Module vs. Power Module). Mechanical mounting and DC bus connection must be re-evaluated.
Q: Is the 6SL3351-6GH35-8AB3 compatible with older CU320 (not CU320-2)?
A: No. The original CU320 (6SL3040-0MA00-0AA0) does not support DRIVE-CLiQ topology required by this module. Upgrade to CU320-2 is required.
Q: What is the difference between suffix AA3 and AB3?
A: The AB3 suffix indicates integrated safety functions (STO, SS1, SBC). AA3 variants do not include onboard safety — an external TM54F terminal module is required for safety applications.
Q: Can this module drive a standard induction motor?
A: Yes, in V/f or vector control mode. For best performance with induction motors, use SINAMICS S120 in speed/torque vector mode with encoder feedback.
Q: Do you provide a warranty?
A: Yes — Konmask.com provides a 12-month warranty on all new OEM units and a 6-month warranty on tested surplus units.
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Contact: support@konmask.com | +0086 19859288691
