Sensata Gigavac GX11BA

Sensata Gigavac GX11BA is a 150A 800VDC High Voltage DC Contactor from the GX11 series, designed for compact robotics power, autonomous service platforms, small high-voltage battery packs, and auxiliary DC switching modules that use a 12VDC control supply. This High Voltage DC Contactor uses an SPST-NO-DM main contact form, a 12VDC coil, stud power terminals, wire lead control termination, chassis mounting, and hermetically sealed construction. It is a practical choice when the system needs 800VDC switching capability in a smaller 150A current class.

GX11BA fits equipment where a full-size 350A or 600A contactor would be oversized, but ordinary relays are not suitable for the voltage and current requirement. Compact autonomous machines, mobile inspection robots, portable DC power modules, and small battery service tools often need a sealed contactor that can switch a high-voltage branch while keeping the control interface simple. The wire lead format lets the contactor sit near the power conductors while the 12V coil wiring routes to a control board, service switch, or safety circuit.

Product Positioning

GX11BA should be positioned as a compact 12V coil High Voltage DC Contactor for moderate-current high-voltage switching. Compared with GX12BA, GX11BA is a lower 150A current-class option. Compared with GX21BA, it shares the 12V coil and 150A class, but GX11BA can be positioned around compact robotics, portable power, and space-limited equipment rather than service equipment. Compared with GX11TAB, GX11BA should be treated as a simpler configuration without auxiliary feedback emphasis.

The no-auxiliary-contact positioning is useful for systems that already monitor operation through bus voltage, load current, controller state, or power-stage response. In compact robotic equipment, avoiding extra feedback wiring can reduce harness complexity and save space while still giving the system a reliable High Voltage DC Contactor for the main switching function.

Key Specifications

• Manufacturer series: Sensata Gigavac GX11
• Part number: GX11BA
• Product type: High Voltage DC Contactor
• Main contact form: SPST-NO-DM / 1 Form X
• Rated current: 150A
• Maximum switching voltage: 800VDC / 12-800VDC range according to distributor data
• Coil voltage: 12VDC
• Must operate voltage: approximately 8VDC according to DigiKey data
• Must release voltage: approximately 0.5VDC according to DigiKey data
• Power termination: stud terminals
• Control termination: wire leads / flying leads
• Mounting style: chassis mount
• Auxiliary contact: not listed in checked public distributor data
• Construction: hermetically sealed
• Operating temperature range: -55°C to +85°C
• Typical operate time: approximately 20ms
• Typical release time: approximately 12ms

Features and Benefits

The 150A current rating gives GX11BA a useful role in compact high-voltage designs. A High Voltage DC Contactor in this range can control charger paths, converter inputs, protected battery branches, and auxiliary DC loads where small relays are not enough but larger contactors would add unnecessary size.

The 12VDC coil is convenient for compact equipment that already uses 12V control electronics. Portable service modules, robotic platforms, compact battery packs, and field tools often use 12V for controllers, indicators, switches, and safety circuits. GX11BA can fit that low-voltage control architecture without requiring a 24V or 48V auxiliary supply.

Stud terminals provide secure connections for high-current cables or busbars. The wire leads keep the coil side flexible, allowing designers to route the control wiring through tight enclosures, service loops, or machine harnesses. This makes GX11BA easier to place in small power compartments than a board-mounted contactor.

Hermetically sealed construction helps protect the contact chamber from dust, humidity, and airborne contamination. A sealed High Voltage DC Contactor is useful in mobile platforms and compact industrial equipment where vibration, temperature changes, and repeated movement can affect open contactor designs.

Applications

GX11BA is especially suitable for compact robotics power and autonomous service equipment. In a mobile robot, inspection platform, battery-powered tool cart, or small electric machine, this High Voltage DC Contactor can isolate a battery branch, connect a converter input, switch a charger interface, or disconnect a protected auxiliary load.

The contactor can also be used in portable high-voltage test boxes, compact DC distribution panels, small energy storage modules, charger support equipment, and laboratory power assemblies. Its 150A rating is appropriate for moderate-current circuits where 225A, 350A, or 600A contactors would be oversized.

Selection Guide

Before selecting GX11BA, 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 stable 12VDC source. If the equipment uses 24VDC control power, a GX11C or related 24V coil model may be more appropriate. If direct contact status feedback is required, choose a GX11 variant with auxiliary contacts rather than treating GX11BA as a feedback model.

FAQ

What is GX11BA used for?

GX11BA is used for compact robotics power, portable battery modules, charger interfaces, converter inputs, and 800VDC-class moderate-current switching.

Is GX11BA a High Voltage DC Contactor?

Yes. GX11BA is a Sensata Gigavac GX11 series High Voltage DC Contactor with 150A current rating and 800VDC maximum switching capability.

What coil voltage does GX11BA use?

GX11BA uses a 12VDC coil. DigiKey lists approximately 8VDC must-operate voltage and 0.5VDC must-release voltage.

What termination style does GX11BA use?

GX11BA uses stud terminals for the main power path and wire leads for the coil/control connection, with chassis mounting.

How is GX11BA different from GX11TAB?

GX11BA is best treated as a simple 12V coil GX11 configuration, while GX11TAB is commonly positioned around low-power 24V coil operation and auxiliary contact feedback.

Conclusion

GX11BA is a 150A 800VDC High Voltage DC Contactor for compact robotics power, portable high-voltage modules, charger support circuits, converter inputs, and space-limited DC switching assemblies. With its Sensata Gigavac GX11 sealed construction, 12VDC coil, SPST-NO-DM contact form, stud terminals, wire leads, and chassis mounting, it is a practical option for OEM systems that need reliable moderate-current high-voltage switching with simple 12V control wiring.