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1SBL411025R8000 ABB GA75-10-00 220-230V 50Hz DC Switching Contactor
ABB GA75-10-00 1SBL411025R8000 is a specialised DC switching contactor with three series-connected normally open main contacts, a 125 A thermal current rating and a 220–230 V AC 50 Hz operating coil.
£456.50
Why Choose the ABB GA75-10-00 Contactor?
The ABB GA75-10-00 is a specialised DC switching contactor designed for controlling direct-current power circuits in demanding industrial applications. Unlike a conventional three-phase contactor, the GA75 uses its three main contact paths connected in series to provide the multiple contact breaks required for effective interruption of DC current.
This GA75 configuration provides three normally open main contacts and no built-in auxiliary contacts. Its series-connected pole arrangement makes it suitable for DC-1, DC-3 and DC-5 utilisation duties, including resistive DC loads and selected DC motor switching applications.
ABB order code 1SBL411025R8000 identifies this exact GA75-10-00 configuration with a 220–230 V AC, 50 Hz operating coil; the corresponding 60 Hz control rating is 230–240 V AC. The GA75 provides a conventional free-air thermal current of 125 A and is designed for DC power circuits with rated operational voltage up to 1000 V DC.
Key Advantages
- Purpose-designed ABB GA75 contactor for DC switching.
- Three contact breaks connected in series for effective DC current interruption.
- 125 A conventional free-air thermal current at 40 °C.
- DC-1, DC-3 and DC-5 utilisation capabilities for industrial DC loads.
- 220–230 V AC, 50 Hz operating coil.
- Main circuit rated operational voltage up to 1000 V DC.
Key Features
- ABB GA75 contactor series.
- Specialised for direct-current power switching.
- 3 normally open main contacts.
- Three main contact paths used in series for DC interruption.
- No built-in auxiliary contacts.
- 220–230 V AC at 50 Hz control voltage.
- 230–240 V AC at 60 Hz control voltage.
- Maximum electrical switching frequency of 300 cycles per hour.
Reliable Multi-Break Switching for DC Power Circuits
Interrupting direct current requires different contact arrangements from conventional AC switching because there is no natural current zero-crossing to assist arc extinction. The ABB GA75 addresses this requirement by using three contact breaks connected in series, increasing the contact gap available for interrupting the DC circuit.
This construction enables the GA75-10-00 to handle industrial DC switching duties including DC-1 resistive loads and DC-3/DC-5 motor-related applications. With a main-circuit capability up to 1000 V DC and a maximum electrical switching frequency of 300 operations per hour, it provides a purpose-designed solution for industrial DC control systems.
Typical Applications
- Industrial DC power circuit switching.
- DC resistive loads under DC-1 utilisation duty.
- DC motor control applications under appropriate DC-3 or DC-5 ratings.
- Battery-powered industrial systems.
- DC distribution and control panels.
- Industrial machinery requiring high-voltage DC switching.
Technical Specifications
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| Terminal Type | Screw | |
|---|---|---|
| Series | GA75 | |
| ABB order code | 1SBL411025R8000 | |
| Product type | DC switching contactor | |
| Main contact configuration | 3NO | |
| Main contact arrangement | Three contact breaks connected in series for DC switching | |
| Built-in auxiliary contacts | 0NO + 0NC | |
| Rated control circuit voltage at 50 Hz | 220–230 V AC | |
| Rated control circuit voltage at 60 Hz | 230–240 V AC | |
| Conventional free-air thermal current at 40 °C | 125 A | |
| DC-1 operational current at 220–440 V DC and 55 °C | 100 A | |
| DC-3 operational current at 220–440 V DC and 55 °C | 85 A | |
| DC-5 operational current at 220–440 V DC and 55 °C | 35 A | |
| Main circuit rated operational voltage | up to 1000 V DC | |
| Rated insulation voltage | 1000 V IEC / 600 V UL/CSA | |
| Rated impulse withstand voltage | 8 kV | |
| Maximum electrical switching frequency | 300 cycles/hour | |
| Terminal type | Screw terminals | |
| Dimensions | 70 × 132 × 108 mm (W × H × D) | |
| Product weight | approx. 1.22 kg | |
| ABB product group | 311503-Contactors A Small (Frctl) |
Frequently Asked Questions
What is the ABB GA75-10-00 used for?
The ABB GA75-10-00 is a specialised contactor designed for switching DC power circuits, including DC-1, DC-3 and DC-5 utilisation duties within the manufacturer's specified ratings.
What control voltage does the GA75-10-00 1SBL411025R8000 use?
This exact GA75-10-00 version uses a 220–230 V AC, 50 Hz operating coil. Its corresponding 60 Hz control voltage is 230–240 V AC.
Why does the ABB GA75 use three contact breaks in series?
The three contact breaks are connected in series to improve interruption of direct current. This arrangement provides multiple breaks in the DC circuit and supports effective arc interruption when the contactor opens.
What is the thermal current rating of the ABB GA75-10-00?
The GA75-10-00 has a conventional free-air thermal current rating of 125 A at 40 °C.
What is the maximum DC operational voltage of the GA75-10-00?
The ABB GA75-10-00 is specified for a main-circuit rated operational voltage of up to 1000 V DC, subject to the applicable load, utilisation category and current ratings.
Trusted by Industrial Electrical Professionals
ABB GA contactors are engineered specifically for DC power switching using multiple contact breaks connected in series. The GA75-10-00 1SBL411025R8000 combines a 125 A thermal current rating, DC-1/DC-3/DC-5 switching capability and a 220–230 V AC, 50 Hz operating coil for industrial DC control applications.
