Sensata Gigavac GX11KA

Sensata Gigavac GX11KA is a 150A 800VDC High Voltage DC Contactor from the GX11 series, designed for AC-controlled test racks, laboratory DC power panels, industrial validation fixtures, and service equipment that uses 120VAC control power. This High Voltage DC Contactor uses an SPST-NO-DM main contact form, a 120VAC coil, stud power terminals, 38 cm flying lead control termination, chassis mounting, and hermetically sealed construction. It is a practical choice when a system needs reliable 800VDC switching but the control cabinet is built around AC relay logic instead of a 12V, 24V, or 48VDC coil supply.

GX11KA is different from many GX11 variants because its coil is rated for 120VAC. That makes it useful in bench equipment, factory test stations, maintenance panels, and older industrial control systems where 120VAC control wiring is already available. The 150A current rating supports moderate high-voltage DC paths, while the sealed GX11 construction helps protect the contact chamber from dust, humidity, and contamination in workshop and industrial environments.

Product Positioning

GX11KA should be positioned as a 120VAC coil High Voltage DC Contactor for AC-controlled high-voltage DC switching. Compared with GX11BA, which uses a 12VDC coil, GX11KA is better suited to control cabinets and test racks that already use AC relay circuits. Compared with GX11KAB, GX11KA should be treated as the simpler no-auxiliary-contact version, while auxiliary-contact versions are better when direct feedback is required.

This model is especially useful when the power circuit is DC but the control architecture is AC. A technician or PLC output can command the 120VAC coil, while the main contacts switch the high-voltage DC path. That separation allows GX11KA to fit mixed-control environments where AC controls supervise DC loads, converters, chargers, or test channels.

Key Specifications

• Manufacturer series: Sensata Gigavac GX11
• Part number: GX11KA
• Product type: High Voltage DC Contactor
• Main contact form: SPST-NO-DM / 1 Form X
• Rated current: 150A
• Maximum switching voltage: 800VDC
• Coil voltage: 120VAC
• Coil current: approximately 60mA according to DigiKey data
• Coil power: approximately 7.2W according to DigiKey data
• Coil resistance: approximately 2k ohms according to DigiKey data
• Must operate voltage: approximately 80VAC according to DigiKey data
• Must release voltage: approximately 4.5VAC according to DigiKey data
• Power termination: stud terminals
• Control termination: flying leads / wire leads
• Lead length: 38 cm / 15 in according to JB Controls listing
• Mounting style: chassis mount
• Auxiliary contact: none according to JB Controls listing
• Construction: hermetically sealed
• Operating temperature range: -55°C to +85°C
• Typical operate time: approximately 30ms
• Typical release time: approximately 50ms

Features and Benefits

The 120VAC coil is the main reason to select GX11KA. Many industrial control benches, production testers, charger service panels, and safety relay systems still use 120VAC control voltage. This High Voltage DC Contactor allows those systems to switch an 800VDC-rated power path without adding a separate DC coil supply.

The 150A current rating gives GX11KA a useful role in moderate-current DC circuits. It can switch charger outputs, converter inputs, battery test paths, protected DC branches, and service disconnect circuits where ordinary relays do not provide enough voltage or current capability.

Stud terminals provide secure high-current power connections. The flying leads allow the coil wiring to route through an AC control harness, relay panel, or service switch circuit. This makes the High Voltage DC Contactor easier to integrate into test cabinets and industrial panels where power and control wiring are separated.

Hermetically sealed construction helps maintain switching reliability. A sealed contact chamber reduces exposure to dust, moisture, and airborne contamination, which is important in workshops, production areas, and laboratory racks that may operate for long periods with repeated switching cycles.

Applications

GX11KA is especially suitable for AC-controlled test racks and industrial validation systems. In a battery test bench, charger test cabinet, DC converter fixture, or laboratory power panel, this High Voltage DC Contactor can connect a high-voltage source, isolate a load branch, switch a charger path, or disconnect a test channel under 120VAC coil control.

The contactor can also be used in service equipment, maintenance disconnect panels, mixed AC-control/DC-power cabinets, charger support systems, and production test fixtures. Its 150A rating makes it appropriate for moderate-current high-voltage DC paths where larger 225A, 350A, or 600A contactors would be oversized.

Selection Guide

Before selecting GX11KA, confirm maximum DC voltage, continuous current, peak current, inrush current, switching frequency, and load type. This High Voltage DC Contactor is listed for 150A and up to 800VDC maximum switching, but final suitability depends on circuit energy, precharge strategy, cable sizing, thermal rise, fuse coordination, and enclosure conditions.

The coil supply should be a suitable 120VAC source. If the equipment uses DC control power, a GX11 variant with 12VDC, 24VDC, 48VDC, or another DC coil may be more appropriate. If direct status feedback is required, choose a GX11 version with auxiliary contacts rather than GX11KA.

FAQ

What is GX11KA used for?

GX11KA is used for AC-controlled test racks, industrial validation panels, charger service equipment, converter fixtures, and 800VDC-class moderate-current switching.

Is GX11KA a High Voltage DC Contactor?

Yes. GX11KA is a Sensata Gigavac GX11 series High Voltage DC Contactor with 150A current rating and 800VDC maximum switching capability.

What coil voltage does GX11KA use?

GX11KA uses a 120VAC coil. DigiKey lists approximately 60mA coil current and 7.2W coil power.

Does GX11KA include auxiliary contacts?

No. JB Controls lists GX11KA with no auxiliary contact. Use a related GX11 auxiliary-contact model if feedback is required.

How is GX11KA different from GX11BA?

GX11KA uses a 120VAC coil, while GX11BA uses a 12VDC coil. Both are GX11 150A High Voltage DC Contactor options for 800VDC-class switching.

Conclusion

GX11KA is a 150A 800VDC High Voltage DC Contactor for AC-controlled test racks, industrial service panels, charger validation fixtures, and mixed AC-control/DC-power systems. With its Sensata Gigavac GX11 sealed construction, 120VAC coil, SPST-NO-DM contact form, stud terminals, 38 cm flying leads, chassis mounting, and no-auxiliary-contact configuration, it is a practical option for systems that need reliable high-voltage DC switching from a 120VAC control circuit.