Siemens 6SL3955-0TX00-1AA2 – Thyristor Power Semiconductor | SINAMICS Drive Platform
Engineering Background: The 6SL3955-0TX00-1AA2 is a factory-specified thyristor (SCR) spare component designed for use within Siemens SINAMICS medium-voltage and high-power drive converter assemblies. Thyristors in this series serve as the core switching elements in the rectifier and inverter bridge stacks, directly governing AC-to-DC and DC-to-AC power conversion with precision gate-controlled turn-on characteristics.
Product Positioning: Sourced and verified for procurement engineers requiring OEM-equivalent replacement parts for SINAMICS drive systems. Konmask.com supplies this component to MRO teams, system integrators, and OEM service departments across industrial, energy, and process automation sectors. All units are inspected prior to dispatch and traceable to original Siemens manufacturing documentation.
Complete Technical Specifications
- Part Number (SKU): 6SL3955-0TX00-1AA2
- Manufacturer: Siemens AG
- Component Type: Thyristor (Silicon Controlled Rectifier – SCR)
- Platform Compatibility: SINAMICS Medium-Voltage / High-Power Drive Series
- Function: Gate-controlled power switching in rectifier/inverter bridge stacks
- Mounting: Press-pack / stud-mount configuration (per assembly design)
- Weight: Approx. 700 g
- Country of Origin: Germany / EU (Siemens manufacturing)
- Compliance: CE, RoHS-compatible per Siemens product line standards
- HS Code: 8541.30 (Thyristors, diacs and triacs)
Proven Application Environments
- SINAMICS GM150 / SM150 medium-voltage drive converter stacks
- SINAMICS S150 / G150 high-power cabinet drive systems
- Industrial motor drive MRO replacement programs
- Power generation and grid-tie converter assemblies
- Heavy process industries: steel, cement, mining, oil & gas, water treatment
- Marine propulsion and offshore platform drive systems
Engineering Advantages
- OEM Part Number Traceability: Exact Siemens 6SL3955 series reference — no cross-reference ambiguity
- Drop-in Replacement: Maintains original electrical and mechanical interface specifications
- Minimized Downtime: Ready-to-ship stock reduces unplanned outage duration
- Verified Authenticity: Each unit inspected against Siemens datasheet parameters before dispatch
- Long-term Availability: Konmask maintains buffer stock for legacy and current SINAMICS platforms
System Architecture & Signal Flow
Within a SINAMICS drive converter, the 6SL3955-0TX00-1AA2 thyristor is positioned in the AC input rectifier bridge or the DC link inverter stage. Gate pulses from the drive’s firing control board trigger conduction at precise phase angles, enabling controlled rectification or inversion. In medium-voltage topologies, multiple thyristors are stacked in series/parallel configurations to achieve the required voltage and current ratings. Proper thermal management via heatsink clamping and cooling medium is essential for rated service life.
Sourcing & Quality Verification
- Units sourced from authorized Siemens distribution channels and verified MRO surplus
- Pre-shipment inspection: visual, dimensional, and where applicable, parametric electrical check
- Packaging: anti-static, moisture-barrier sealed with desiccant for transit protection
- Documentation available: Siemens part number label, inspection record, commercial invoice
- Warranty: 12-month limited warranty against manufacturing defects
Procurement Process
- Submit RFQ via Konmask.com product page or email support@konmask.com
- Receive stock confirmation, lead time, and formal quotation within 24 hours
- Issue PO — accepted formats: PDF, email, ERP-generated
- Payment: T/T, L/C, or agreed credit terms for qualified accounts
- Dispatch: DHL / FedEx / sea freight with full tracking and export documentation
- Post-delivery technical support available via email or WhatsApp
Technical FAQ
Q: Is 6SL3955-0TX00-1AA2 an active or discontinued Siemens part?
A: Please contact us for current lifecycle status. Konmask maintains stock of both active and legacy SINAMICS spare parts.
Q: Can this thyristor be used as a direct replacement without drive reconfiguration?
A: Yes, provided the host drive assembly matches the original design specification. Consult your Siemens drive service manual for torque and thermal interface requirements.
Q: Do you provide a test report or certificate of conformance?
A: Inspection records and available Siemens documentation are provided upon request at time of order.
Q: What is the minimum order quantity?
A: MOQ is 1 piece. Volume pricing available for orders of 5+ units.
Q: Can you supply matched pairs or sets for bridge stack replacement?
A: Yes. Contact us with your quantity and application details for matched-set sourcing.
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