SIEMENS 6SL3351-6FE33-1AA1 Control Interface Board | Replacement, Equivalent & Selection Guide
The SIEMENS 6SL3351-6FE33-1AA1 is a Control Interface Board designed for the SINAMICS S120 drive series. It serves as the critical communication and control bridge between the drive system and the host controller (PLC/DCS), enabling precise motion control in demanding industrial automation environments. This page provides full technical specifications, compatible replacement models, application guidance, and sourcing information to help engineers and procurement teams make confident decisions.
Technical Specifications
- Part Number: 6SL3351-6FE33-1AA1
- Manufacturer: Siemens AG
- Series: SINAMICS S120
- Function: Control Interface Board (CIB)
- Rated Current: 33 A
- Voltage Class: 3-phase AC, 380–480 V
- Communication Interface: DRIVE-CLiQ
- Cooling Method: Internal air cooling
- Protection Class: IP20
- Operating Temperature: 0 °C to +55 °C
- Storage Temperature: −40 °C to +70 °C
- Weight: Approx. 1.0 kg
- Compliance: CE, UL, cUL
Compatible Replacement & Equivalent Models
The following models are functionally compatible or serve as direct/near-direct replacements for the 6SL3351-6FE33-1AA1. Always verify firmware version and hardware revision before substitution.
- 6SL3351-6FE32-5AA1 — Lower current rating variant (25 A); same CIB form factor, suitable for lighter loads
- 6SL3351-6FE34-1AA1 — Higher current rating variant (41 A); upward-compatible for upgraded drive configurations
- 6SL3351-6FE33-1AA0 — Previous hardware revision; functionally equivalent, check firmware compatibility
- 6SL3351-6FE33-1AB1 — Booksize Compact variant; verify mechanical fit before substitution
- Third-party equivalents: Contact Konmask.com for vetted cross-reference options with full compatibility verification
Note: Siemens part numbers are revision-sensitive. Always confirm the exact hardware revision (e.g., -1AA1 vs -1AA0) with your system documentation before ordering a replacement.
Why Choose the Original Model
- Guaranteed Compatibility: Factory-matched to SINAMICS S120 booksize power modules — no firmware conflicts
- DRIVE-CLiQ Native: Plug-and-play integration with Siemens DRIVE-CLiQ topology; no additional adapters required
- Long-term Support: Siemens provides extended spare parts availability and firmware update support
- Safety Certification: Meets SIL 2 / PLd requirements when used in certified safety configurations
- Reduced Commissioning Time: Works seamlessly with STARTER, SCOUT, and TIA Portal engineering tools
Typical Applications
- CNC machine tool spindle and axis drives
- Industrial robot joint control systems
- Printing and packaging machinery
- Textile and winding machine drives
- Conveyor and material handling systems
- Crane and hoist drive systems
- Test bench and dynamometer setups
System Compatibility
- Drive System: SINAMICS S120 Booksize format
- Control Units: CU320-2 DP, CU320-2 PN, CU310-2 DP, CU310-2 PN
- Engineering Tools: STARTER V5.x, SCOUT TIA V5.x, TIA Portal V15 and above
- Fieldbus: PROFIBUS DP, PROFINET IRT (via control unit)
- Safety Functions: STO, SS1, SLS, SDI (requires Safety license on CU)
- Motor Types: Synchronous servo motors (1FK7, 1FT7), induction motors (1PH8)
Selection Guide
Use the following criteria to select the correct Control Interface Board for your SINAMICS S120 system:
- Step 1 — Rated Current: Match the CIB current rating to your motor’s rated current. The 6SL3351-6FE33-1AA1 is rated for 33 A continuous output.
- Step 2 — Voltage Class: Confirm your DC link voltage matches the 380–480 V AC input class.
- Step 3 — Hardware Revision: Check the revision suffix (-1AA1, -1AA0, etc.) against your existing drive documentation to ensure firmware compatibility.
- Step 4 — Cooling: Verify the cooling method (internal fan vs. cold plate) matches your cabinet design.
- Step 5 — Safety Requirements: If SIL 2 / PLd safety functions are required, confirm the CIB and CU combination supports the required safety options.
- Step 6 — Fieldbus Protocol: Ensure the control unit paired with this CIB supports your required fieldbus (PROFIBUS or PROFINET).
Not sure which model fits your system? Contact our technical team with your drive order number and motor nameplate data for a free selection consultation.
Quality Assurance & Sourcing
- Source: Authorized distribution channels and verified surplus stock
- Inspection: Every unit undergoes visual inspection, label verification, and functional pre-check before shipment
- Packaging: Anti-static ESD packaging with original or equivalent protective materials
- Warranty: 12-month warranty against manufacturing defects
- Traceability: Batch and serial number records maintained for all shipments
- Counterfeit Prevention: All units sourced from traceable supply chains; certificates of conformity available on request
How to Order
- Confirm your part number: 6SL3351-6FE33-1AA1
- Verify hardware revision and firmware version requirements from your system documentation
- Add to cart or contact us for bulk pricing and lead time
- Provide your shipping address and preferred freight method at checkout
- Receive order confirmation with tracking within 1 business day
For urgent requirements or large quantity orders, email support@konmask.com or call +0086 19859288691.
Replacement & Compatibility FAQ
Q: Can I use 6SL3351-6FE33-1AA0 as a direct replacement for 6SL3351-6FE33-1AA1?
A: In most cases yes, but you must verify firmware compatibility. The -1AA0 is an earlier hardware revision and may require a firmware downgrade on the control unit. Always test in a non-production environment first.
Q: Is the 6SL3351-6FE33-1AA1 compatible with SINAMICS S150 or G120?
A: No. This CIB is specifically designed for the SINAMICS S120 Booksize platform. It is not interchangeable with S150 or G120 series components.
Q: What is the lead time for this part?
A: In-stock units ship within 1–3 business days. For out-of-stock items, typical lead time is 2–6 weeks depending on sourcing. Contact us for real-time availability.
Q: Do you provide a test report or certificate of conformity?
A: Yes. Certificates of conformity and inspection reports are available upon request for all orders.
Q: Can Konmask.com help identify the correct replacement if my original part is discontinued?
A: Absolutely. Send us your original part number, drive system model, and application details, and our engineers will recommend the best available equivalent.
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