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In Stock! Reliance SP500 3HP 230V NEMA 1 Drive. Call Now! | Image
2 year warranty

In Stock! Reliance SP500 3HP 230V NEMA 1 Drive. Call Now! | Image
In Stock! Reliance SP500 3HP 230V NEMA 1 Drive. Call Now! | Image
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The 1SU21003 is a 3HP 230VAC Reliance Electric SP500 Variable Frequency Drive.



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  • Part Number: 1SU21003
  • SKU: 1SU21003RE
  • Manufacturer: Reliance Electric
  • Series: SP500 AC Drives

1SU21003 Technical Specifications

Manufacturer Reliance Electric
Series SP500
Part Number 1SU21003
Input Voltage 200-230 VAC
Enclosure NEMA 1 or Chassis
Hz 50/60Hz
Labeling UL Listed, IEC Certified

Product Description

1SU21003 is a 3-phase SP500 drive manufactured by Reliance Electric. The drive, which has a horsepower rating of 3 HP, is enclosed in a NEMA 1 drive, size C. The AC input volts is 200-230 V. The power loss is 210 watts. The input is 12.5 amps and 5.0 KVA. The output is 10.6 amps. The NEMA 1 enclosure is vented and used for general-purpose indoor applications.

The AC power distribution system must meet the service conditions specified in table A.1 of the user manual. The drives must operate within the ambient temperature parameters of 38° to 104° F. The drives must be stored within the ambient temperature parameters of -40° to 149° F. The drives must operate at a non-condensing humidity between 5 and 95%. The drive is intended to operated at a factory-determined minimum speed unless and until it is disconnected from the power source. If the application requires zero speed operation without such disconnection, the user is responsible for assuring safe conditions, for operating personnel by providing suitable guards, audible or visual alarms, or other devices.

The controller nameplate, located on the base in the upper right side of the controller, includes the model number, the serial number, the KVA, the horsepower rating, the manual number, the AC input volts, the AC output volts, the maximum amps, the Hz, the PH, the short circuit SYM RMS rating, and the enclosure type. The nameplate identifies the specifications of the drives. Another way to identify drive specifications is to look at the part number, which tells the user the drive’s input volts, horsepower, and enclosure type.

Frequently Asked Questions about 1SU21003

What does the MODE/ENTER key on the keypad do?
On the 1SU21003 drive's built-in keypad, you can use the MODE/ENTER key for several applications. While in monitor mode, you can use it to advance through each monitor display item. When the drive is stopped, press this button to switch to program mode. When in program mode, the MODE/ENTER key can be used to display and save parameter values. Whether the control source is local or remote, the MODE/ENTER key will always provide these same functions on the 1SU21003 drive.
Does Reliance Electric still manufacture the SP500 1SU21003 drive?
Although Reliance Electric no longer manufactures SP500 1SU21003 drives, we troubleshoot, repair, and recondition 1SU21003 drives at AX Control. Our reconditioning process is done by individuals who have high levels of experience with working on SP500 drives and Reliance Electric products in general as it is our most popular manufacturing provider.
Can I set a password on my 1SU21003 drive to lock my parameter values?
Use parameter F-20 (Password Lockout Enable) to set your parameter values to a password-protected mode. When the F-20 parameter is turned ON, people without the password will still be able to see parameter values but the parameter values cannot be modified from the keypad unless the correct password has been typed in to F-20. *Note: the factory password is always set to 257 and cannot be modified by the user.
What is the standard repair time on a 1SU21003 drive?
The standard repair time on a 1SU21003 SP500 drive is two to four weeks to ensure premium operability. We want to repair your drive fully so that it won't need to be repaired again. If you need a faster repair time, you can get a 5-7 day rush repair for a 10% or $50 additional charge, or you can get a 48 hour emergency rush repair for a 25% or $100 additional charge. Although standard repair time takes longer, it is more likely to guarantee satisfaction on your repaired drive.

Reviews For 1SU21003

Internal Review

The 1SU21003 SP500 drive by Reliance Electric allows the user to easily program in application specific parameter from the local keypad and features seamless menus to accomplish this. The criticism of the 1SU21003 3HP drive is that the removable cover is made of a brittle plastic that often cracks around the corners. Replacing the drive, even in obsolescence, is not overly expensive or complicated. However, finding one on the market with an intact cover makes this drive somewhat less than ideal. - AX Control Technician

Repair Services For 1SU21003

Type Lead Time Price Action
Repair Service 1-2 weeks $1182

Our highly skilled technicians can repair your 1SU21003. All of our repairs come with a 3 Year AX Control Warranty. Please contact us for additional information about our repair process. To receive the repair pricing and lead time listed above please process your repair order via our website. The following repair options may be available upon request:

  • 48-72hr Rush Repair
  • Detailed Repair Reports
  • AX Control Certificate of Warranty

AX Control Warranty Info

All products we sell are backed by our unparalleled warranty. A warranty certificate will be provided with your order upon request.
All PLCs, HMIs, and Turbine Control Boards: 3 Years
All AC/DC and Servo Drives: 2 Years
All Motors: 1 Year
Learn More

1SU21003 Manuals, White Papers, Data Sheets, and Troubleshooting