Product Description
The Allen-Bradley 20AC037C3AYNANC0 is a 25 HP (18.5 kW) PowerFlex 70 AC drive designed for indoor, vertical wall or machine mounting. It operates at 400 VAC input, delivering a variable output frequency and supporting vector and sensorless vector motor control, along with ramp, coast, and S-curve stop modes. With 3-phase input, it provides a continuous output current of 37 Amps, with overload capabilities of 45 Amps for 60 seconds and 60 Amps for 3 seconds. Single-phase input ratings are 18.5 Amps continuous, 22.5 Amps for 60 seconds, and 30 Amps for 3 seconds. Housed in a NEMA/UL Type 4X/12 enclosure, it features a built-in HMI and brake IGBT, supporting enhanced control but lacking feedback. It measures 13.8 x 8.6 x 7.08 inches, weighs 9.25 kg, and requires optional communication adapters (Ethernet, Profibus, etc.) and a brake resistor if needed. Installation and maintenance should be performed by qualified personnel following ESD precautions.
Is Your Device Showing These Signs?
The Allen Bradley 20AC037C3AYNANC0 AC drive commonly experiences issues related to IGBT failures, often indicated by fault codes stemming from overcurrent or ground faults. Capacitor degradation within the DC bus is a frequent problem, leading to voltage instability and drive malfunction. Encoder feedback errors disrupt accurate motor control, necessitating encoder replacement or signal calibration. Communication faults on the Ethernet/IP network disrupt connectivity with the PLC, requiring troubleshooting of network configurations and cable integrity. Parameter corruption in the drive's memory necessitates a firmware reload and parameter reconfiguration to restore proper operation.
Technical specifications
The Allen-Bradley 20AC037C3AYNANC0 is a 25 HP PowerFlex 70 AC drive for indoor mounting, operating at 400 VAC. It offers variable frequency output, vector control, and various stop modes. It supports both 3-phase and single-phase input with specific continuous and overload current ratings. The drive is housed in a NEMA/UL Type 4X/12 enclosure, includes a built-in HMI and brake IGBT, but lacks feedback. It's compact, relatively lightweight, and requires optional communication adapters and a brake resistor depending on the application. Installation and maintenance require qualified personnel and ESD precautions.
Our Repair Process for the
20AC037C3AYNANC0
Our repair process for the Allen Bradley 20AC037C3AYNANC0 AC drive begins with a comprehensive diagnostic evaluation to pinpoint the root cause of the malfunction, focusing on common issues such as IGBT failures indicated by overcurrent or ground fault codes, capacitor degradation within the DC bus causing voltage instability, encoder feedback errors disrupting motor control, communication faults on the Ethernet/IP network disrupting PLC connectivity, and parameter corruption in the drive's memory. Upon identifying the fault, we proceed with component-level repairs, which includes replacing faulty IGBTs, replacing degraded capacitors in the DC bus, replacing or calibrating the encoder, troubleshooting and correcting network configurations and cable integrity for Ethernet/IP communication, and reloading firmware followed by parameter reconfiguration. Post-repair, the drive undergoes rigorous testing under simulated operating conditions to ensure optimal performance and reliability; this includes monitoring key parameters and verifying communication protocols. The repaired drive is then returned with a detailed repair report outlining the work performed and the components replaced.
Your Guarantee: Warranty & Lifetime Support
Your satisfaction is our top priority, and we confidently stand behind the quality of our repairs. That's why every repair service is covered by our comprehensive 24-month warranty. Furthermore, we offer lifetime phone support – if you have questions or need assistance related to our repair down the road, we're here to help. Our service commitment is straightforward: we guarantee our work, and if you're not satisfied, we will make it right. Learn More about our Repair process.
Comprehensive Repairs You Can Depend On
We take immense pride in the quality and reliability of our work. Our process goes beyond simply fixing the immediate problem. We perform a comprehensive inspection of your main board (or other equipment) and proactively replace components known to be failure-prone or showing signs of potential future failure. Before any item is returned, it undergoes rigorous functional testing to ensure it meets performance specifications and operates flawlessly. Visit our main Repair Services page to learn more.
Save Significantly
Our primary goal is to save you hundreds, or even thousands, of dollars compared to the cost of new equipment replacement. By repairing existing components, we provide an economical solution that is also eco-friendly. At Roc Industrial, our commitment to integrity and community drives our consistent growth and ensures you receive a reliable, cost-effective solution.


Please Note: Roc Industrial operates as an independent service provider and is not an authorized distributor for the manufacturers or brands mentioned. Consequently, the original manufacturer's warranty is not applicable to items repaired or sold by us. Roc Industrial provides its own 2-year warranty on all repair services performed.
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Ships from Rochester, NY