SIEMENS 6SE7021-3EB84-1HF3 AC Drive Frequency Converter – SIMOVERT MASTERDRIVES Vector Control
When a critical AC drive fails on the production floor, the consequences are immediate and costly: conveyor lines halt, compressors shut down, and entire manufacturing cells go dark. Every minute of unplanned downtime translates directly into lost output, missed delivery windows, and emergency maintenance costs. The SIEMENS 6SE7021-3EB84-1HF3 is the precision-engineered replacement that restores full motor control capability — eliminating the risk of extended outages in demanding industrial environments.
Within the SIMOVERT MASTERDRIVES Vector Control (VC) platform, the 6SE7021-3EB84-1HF3 occupies the mid-range power class, delivering robust three-phase AC motor control with high dynamic response. This series has been deployed across tens of thousands of installations worldwide — from automotive body shops in Germany to petrochemical plants in the Middle East — establishing it as one of the most trusted variable-speed drive platforms in global industrial automation history.
Technical Specifications
- Manufacturer: SIEMENS AG
- Part Number / SKU: 6SE7021-3EB84-1HF3
- Series: SIMOVERT MASTERDRIVES Vector Control (VC)
- Drive Type: AC Variable Frequency Drive (VFD)
- Control Mode: Vector Control (Sensorless / Closed-Loop)
- Input Voltage: 3-phase AC, 380–480 V ±10%
- Output Power Class: 7.5 kW (approx. 10 HP)
- Output Frequency Range: 0–300 Hz
- Cooling Method: Forced air cooling (integrated fan)
- Protection Rating: IP20
- Communication Interface: PROFIBUS DP (via -1HF3 option board)
- Weight: Approx. 10 kg
- Compliance: CE, UL, cUL
Note: All specifications are based on published SIEMENS documentation. Verify with official datasheets for your specific application.
Key Features & Benefits
- High Dynamic Vector Control: Delivers precise torque and speed regulation even under rapidly changing load conditions, critical for winders, hoists, and extruders.
- PROFIBUS DP Integration (-1HF3): Native fieldbus connectivity enables seamless integration into SIMATIC S7 and other PLC-based automation architectures without additional gateways.
- Wide Input Voltage Tolerance: ±10% input voltage tolerance ensures stable operation in regions with unstable grid supply.
- Modular Architecture: The MASTERDRIVES platform supports hot-swappable option boards, simplifying upgrades and reducing spare-parts inventory complexity.
- Proven Reliability: Designed for 24/7 continuous industrial duty with MTBF ratings exceeding industry averages for this power class.
- Comprehensive Diagnostics: Onboard fault logging and parameter memory (via MMC card support) accelerate troubleshooting and commissioning.
Industry & Equipment Applications
- Automotive Manufacturing: Conveyor systems, robotic welding positioners, paint line drives
- Oil & Gas / Petrochemical: Pump and compressor speed control, wellhead automation
- Pulp & Paper: Winder/unwinder tension control, dryer section drives
- Water & Wastewater: Variable-speed pump stations, aeration blowers
- Mining & Minerals: Belt conveyor drives, crusher motor control
- HVAC & Building Automation: Large AHU fan drives, chiller compressor control
- Food & Beverage: Mixer drives, bottling line conveyors
System Integration & Compatible Parts
The 6SE7021-3EB84-1HF3 is designed to operate within the broader SIMOVERT MASTERDRIVES ecosystem. Compatible and commonly paired components include:
- Option Boards: PROFIBUS DP (6SE7090-0XX84-0FF5), DeviceNet, CANopen communication modules
- Braking Resistors: SIEMENS 6SE70 series external braking resistors for regenerative load applications
- Line Filters: SIEMENS EMC line filters for CE compliance in sensitive environments
- Control Units: Compatible with SIMOVERT MASTERDRIVES CU (Control Unit) boards for multi-axis configurations
- HMI / Operator Panels: OP1S operator panel (6SE7090-0XX84-2FK0) for local parameter access
Our Quality Assurance Process
At Konmask.com, every unit undergoes a structured verification process before shipment:
- Visual Inspection: PCB, connectors, capacitors, and housing checked for physical damage or counterfeit indicators
- Label & Serial Number Verification: Cross-referenced against SIEMENS production databases where applicable
- Functional Power-On Test: Drive powered and parameter read-back confirmed (where test bench available)
- Anti-Static Packaging: All units shipped in ESD-safe bags with foam cushioning and double-wall cartons
- Documentation: Certificate of conformity and inspection report available on request
How to Order
- Submit your inquiry via the Contact / RFQ form on this page
- Our technical team confirms availability, lead time, and pricing within 24 business hours
- Receive a formal quotation with payment terms and shipping options
- Confirm order — we arrange secure export packaging and freight forwarding
- Track your shipment with full documentation (commercial invoice, packing list, COO)
Why Choose Konmask.com?
- Specialized in industrial automation components — not a generalist marketplace
- Direct sourcing relationships with verified suppliers across Asia and Europe
- Technical pre-sales support from engineers with hands-on SIEMENS drive experience
- Export-ready documentation for customs clearance in 40+ countries
- Responsive after-sales support with warranty coverage on stocked units
Frequently Asked Questions
Q: Is the 6SE7021-3EB84-1HF3 a new or refurbished unit?
A: We stock both new-in-box and professionally refurbished units. Please specify your requirement in the RFQ and we will confirm availability and pricing accordingly.
Q: What does the “-1HF3” suffix indicate?
A: The -1HF3 designates a specific option board configuration — in this case, the PROFIBUS DP communication interface integrated into the drive unit.
Q: Can this drive replace a 6SE7021-3EB84-1HF0 or other suffix variants?
A: Suffix variants differ in option board configuration. Cross-compatibility depends on your fieldbus and control architecture. Contact our engineers for a compatibility assessment before ordering.
Q: What is the typical lead time?
A: In-stock units ship within 3–5 business days. For sourced units, lead time is typically 2–4 weeks depending on origin.
Q: Do you provide a warranty?
A: Yes. Stocked units carry a 90-day functional warranty. Extended warranty options are available — please inquire.
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