ebm-papst R3G500-RA25-01 – High-Efficiency EC Centrifugal Fan | R3G500 Series Platform
Engineering Background
The ebm-papst R3G500-RA25-01 is a premium electronically commutated (EC) centrifugal fan engineered for demanding industrial and commercial HVAC applications. Built on ebm-papst’s globally recognized R3G500 platform, this unit integrates a brushless EC motor with an aerodynamically optimized backward-curved impeller to deliver exceptional airflow efficiency, low acoustic emissions, and intelligent speed control — all within a compact, maintenance-free package.
Product Positioning
Designed for procurement engineers and system integrators who require verifiable performance data, long service life, and seamless integration into Building Management Systems (BMS) or industrial control architectures. The R3G500-RA25-01 is a direct replacement and upgrade path for legacy AC centrifugal fans in air handling units (AHUs), fan coil units (FCUs), refrigeration condensers, and process cooling enclosures.
Complete Technical Specifications
| Parameter | Value |
|---|---|
| Manufacturer | ebm-papst Mulfingen GmbH & Co. KG |
| Part Number / SKU | R3G500-RA25-01 |
| Series / Platform | R3G500 |
| Fan Type | EC Centrifugal Fan (Backward-Curved Impeller) |
| Motor Technology | Electronically Commutated (EC) / BLDC |
| Nominal Voltage | 200–277 V AC, 1-phase / 3-phase (50/60 Hz) |
| Speed Control | 0–10 V DC analog / PWM / RS-485 MODBUS RTU |
| Impeller Diameter | 500 mm |
| Efficiency Class | IE5 equivalent (ErP 2015/1253/EU compliant) |
| Protection Rating | IP44 (motor) |
| Insulation Class | F (155°C) |
| Ambient Temperature | -20°C to +60°C |
| Bearing Type | Permanently lubricated ball bearings |
| Service Life (L10) | ≥ 40,000 hours @ 40°C |
| Country of Origin | Germany |
| Certifications | CE, UL, cUL, RoHS |
Proven Application Environments
- Air Handling Units (AHU) – Central HVAC supply and return air systems in commercial buildings
- Fan Coil Units (FCU) – Precision climate control in data centers and clean rooms
- Refrigeration Condensers – Cold chain logistics, supermarket refrigeration racks
- Industrial Process Cooling – Control cabinet ventilation, laser cooling, machine tool enclosures
- Telecom & Data Center Infrastructure – High-density server rack cooling with variable airflow demand
- Pharmaceutical & Food Processing – Hygienic environments requiring low-vibration, low-noise operation
Engineering Advantages
- EC Motor Efficiency: Up to 70% more energy-efficient than equivalent AC fan motors — directly reduces OPEX over the product lifecycle
- Integrated Electronics: On-board motor controller eliminates external VFD requirements, reducing panel space and BOM cost
- Analog & Digital Control: Native 0–10 V, PWM, and MODBUS RTU interfaces enable plug-and-play integration with Siemens, Honeywell, Schneider, and Johnson Controls BMS platforms
- Backward-Curved Impeller: Non-overloading power curve ensures stable operation across the full airflow range without motor overload risk
- Low Acoustic Signature: Aerodynamically optimized blade geometry minimizes tonal noise — critical for occupied spaces and noise-sensitive installations
- Maintenance-Free Design: Sealed ball bearings with permanent lubrication eliminate scheduled maintenance intervals
- Soft-Start Function: Built-in ramp-up control prevents mechanical shock on startup, extending system longevity
System Architecture & Signal Flow
The R3G500-RA25-01 operates as a self-contained fan module. The EC motor controller accepts a reference signal (0–10 V DC or PWM) from the BMS or PLC output card. The controller modulates motor speed via internal IGBT switching, maintaining the commanded airflow setpoint. Fault status and operational data (speed, power, temperature) are available via MODBUS RTU over RS-485 for integration into SCADA or building automation systems.
Typical Signal Flow: BMS/PLC → 0–10 V Analog Output → R3G500-RA25-01 Control Input → EC Motor Controller → BLDC Motor → Impeller → Airflow Output
Sourcing & Quality Verification
- All units sourced through authorized ebm-papst distribution channels or verified OEM surplus with full traceability
- Each unit inspected for: intact motor housing, undamaged impeller blades, legible nameplate data, and functional connector integrity
- Batch documentation available upon request: manufacturer date code, country of origin certificate, and CE declaration of conformity
- Anti-counterfeit verification: ebm-papst holographic label and laser-etched serial number cross-referenced against manufacturer records where applicable
Procurement Process
- Step 1: Confirm part number R3G500-RA25-01 against your BOM or existing fan nameplate
- Step 2: Submit RFQ via support@konmask.com with required quantity and delivery timeline
- Step 3: Receive quotation with lead time, unit price, and shipping options (DHL Express / sea freight)
- Step 4: Confirm PO — payment via T/T, PayPal, or trade credit (approved accounts)
- Step 5: Shipment with commercial invoice, packing list, and optional third-party inspection report
Technical FAQ
Q: Can the R3G500-RA25-01 replace an existing AC centrifugal fan of the same frame size?
A: In most cases yes, provided the mounting flange dimensions and duct connections are compatible. The EC motor eliminates the need for a separate VFD. Consult the ebm-papst dimensional drawing (available on request) to confirm mechanical fit.
Q: What control signal does this fan require?
A: The standard variant accepts a 0–10 V DC analog reference signal. MODBUS RTU (RS-485) communication is available for digital integration. Confirm the specific control variant suffix when ordering.
Q: Is this unit suitable for outdoor installation?
A: The motor carries IP44 protection, suitable for indoor and sheltered outdoor installations. For fully exposed outdoor environments, specify an IP54 or IP55 variant.
Q: What is the minimum order quantity (MOQ)?
A: MOQ is 1 unit. Volume pricing is available for orders of 5 units or more. Contact us for a tiered pricing schedule.
Q: Can you provide an ebm-papst factory test certificate?
A: Factory test certificates and performance curves are available for new-in-box units. Contact support@konmask.com to request documentation prior to purchase.
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