ABB UA30-30-10RA 1SBL281024R8410 capacitor switching contactor, a three-pole 30 kvar device with integrated damping resistors for power factor correction applications.
£212.83
The ABB 1SBL281024R8410 is a robust three-pole capacitor switching contactor designed for reliable switching of capacitor banks in low-voltage power factor correction systems. The contactor is part of ABB's UA capacitor switching contactor series and is specifically designed for applications where capacitor inrush currents can significantly exceed the nominal RMS current.
The UA30-30-10RA incorporates a special front-mounted block with pre-insertion damping resistors to limit current peaks when capacitor banks are energised. The resistors provide capacitor precharging and help reduce the second current peak that occurs when the main contacts close, supporting reliable operation in demanding power factor correction installations.
With a 30 kvar rating at 400 V AC and an 110 V AC control circuit at 50 Hz, or 110–120 V AC at 60 Hz, the ABB 1SBL281024R8410 is suited to capacitor bank switching applications in industrial and commercial electrical installations. Its three-pole block design includes one built-in normally open auxiliary contact for control and signalling functions.
Capacitor switching contactors such as the ABB UA30-30-10RA are designed specifically for power factor correction installations where capacitor banks must be repeatedly connected and disconnected. Conventional contactors can be subjected to substantial inrush currents when switching capacitors, making specialised capacitor switching equipment important for reliable operation.
The UA30-30-10RA uses a dedicated front-mounted damping resistor arrangement to limit the initial capacitor current peak and provide controlled precharging before the main contacts close. This design helps protect the switching equipment and capacitor bank while supporting dependable operation in industrial electrical systems.
| Manufacturer | ABB |
|---|---|
| Series | UA Capacitor Switching Contactors |
| Model | UA30-30-10RA |
| Product type | Capacitor switching contactor |
| ABB product ID | 1SBL281024R8410 |
| Capacitor switching rating | 30 kvar at 400 V AC |
| Main contacts | 3 NO |
| Auxiliary contacts | 1 NO, 0 NC |
| Control voltage | 110 V AC at 50 Hz; 110–120 V AC at 60 Hz |
| Rated operational voltage | up to 690 V AC |
| Rated insulation voltage | 1000 V according to IEC 60947-4-1 |
| Rated impulse withstand voltage | 8 kV |
| Protection rating | IP20 |
| Electrical durability | 250,000 cycles at Ue ≤ 440 V; 100,000 cycles at Ue 500–690 V |
| Mechanical durability | 3,000,000 cycles |
| Dimensions (H × W × D) | 130 × 54 × 141 mm |
| Weight | 0.81 kg |
| Terminal type | Screw terminals |
| Standards | IEC/EN 60947-1, IEC/EN 60947-4-1 |
The ABB 1SBL281024R8410 is a three-pole capacitor switching contactor designed for switching capacitor banks in power factor correction systems.
The UA30-30-10RA is rated for capacitor switching applications up to 30 kvar at 400 V AC.
The contactor has a 110 V AC control voltage at 50 Hz and 110–120 V AC at 60 Hz.
Yes, the UA30-30-10RA includes a front-mounted damping resistor block designed to limit capacitor energisation current peaks and provide capacitor precharging.
The ABB 1SBL281024R8410 includes one normally open auxiliary contact and no normally closed auxiliary contact.
ABB UA capacitor switching contactors provide dedicated switching technology for power factor correction systems, combining robust three-pole construction with integrated damping resistors for reliable capacitor bank operation.
● Service Agreements
Credit Accounts
Our service agreements are built to support long term procurement relationships. By working closely with engineering teams and procurement departments, we help streamline purchasing processes while ensuring consistent access to critical components and sourcing support when it matters most.
● frequently asked questions
At Led Controls Ltd we help engineers source the right automation and control gear with confidence. below are quick answers to what we are asked most often.
We supply all leading manfacturers in our industry. we offer next day delivery on most poplour products.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
● latest blog
LED Controls is a specialist distributor of factory automation and industrial controls, supplying OEMs, machine builders, panel builders and end users throughout the UK and worldwide. As a trusted UK distributor for many of the world’s leading automation manufacturers, we provide industrial control products, technical expertise and bespoke automation solutions backed by outstanding customer service.
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...