Sensata Gigavac GX11FA

Sensata Gigavac GX11FA is a 150A 800VDC High Voltage DC Contactor from the GX11 series, designed for telecom backup power, 48V auxiliary control cabinets, compact UPS modules, and moderate-current high-voltage DC switching systems. This High Voltage DC Contactor uses an SPST-NO-DM main contact form, a 48VDC coil, stud power terminals, 38 cm flying lead control wiring, chassis mounting, and hermetically sealed construction. It is a practical option when the system needs 800VDC switching capability and a 48V control supply without adding auxiliary feedback contacts.

GX11FA fits equipment where the control architecture is already based on 48VDC. Telecom rooms, backup power shelves, battery supervision panels, and compact energy modules often use 48V auxiliary power for controllers, monitoring hardware, relays, and protection circuits. The 150A rating gives this High Voltage DC Contactor enough capacity for branch isolation, converter input switching, charger paths, and protected DC outputs, while keeping the package smaller than higher-current GX or GV contactors.

Product Positioning

GX11FA should be positioned as a 48V coil High Voltage DC Contactor for backup power and telecom-style DC control systems. Compared with GX11BA, which uses a 12VDC coil, GX11FA is better matched to equipment with a 48V auxiliary rail. Compared with GX11KA, which uses a 120VAC coil, GX11FA is intended for DC-controlled cabinets rather than AC relay panels.

The no-auxiliary-contact configuration is useful when the system already checks operation through bus voltage, current sensors, controller state, or charger response. In backup power cabinets and telecom energy shelves, this can keep the harness simpler while still providing a reliable High Voltage DC Contactor for the main switching path.

Key Specifications

• Manufacturer series: Sensata Gigavac GX11
• Part number: GX11FA
• 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: 48VDC
• Must operate voltage: approximately 28VDC according to DigiKey data
• Must release voltage: approximately 1.8VDC 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 12ms

Features and Benefits

The 48VDC coil is the main selection point for GX11FA. A High Voltage DC Contactor with a 48V coil can integrate directly into telecom backup systems, energy shelves, and compact battery cabinets that already use 48V auxiliary control. This avoids adding a separate 12V or 24V coil supply.

The 150A current rating gives GX11FA a useful role in moderate-current high-voltage circuits. It can switch DC converter inputs, battery branch circuits, charger outputs, service disconnect paths, and protected auxiliary loads where ordinary relays are not suitable.

The 38 cm flying leads support compact cabinet wiring. The contactor can be mounted close to the DC conductors, while the coil leads route to a control board, fuse panel, safety switch, or telecom monitoring module. This makes the High Voltage DC Contactor easier to install in shelves and enclosures with limited space.

Stud terminals provide secure power connections for cables or busbars. In 800VDC-class equipment, connection quality, insulation spacing, conductor sizing, and protection coordination must be reviewed carefully. GX11FA gives designers a practical sealed contactor format for these requirements.

Hermetically sealed construction helps protect the internal contact system from humidity, dust, and airborne contamination. This is valuable in backup power rooms, equipment shelters, and industrial cabinets where long service intervals and reliable switching behavior are important.

Applications

GX11FA is especially suitable for telecom backup power and 48V-controlled energy systems. In a telecom cabinet, this High Voltage DC Contactor can isolate a battery branch, connect a converter input, switch a charger path, or disconnect a protected DC output during service and fault conditions.

The contactor can also be used in compact UPS modules, battery test shelves, industrial DC control boxes, remote power shelters, charger support equipment, and laboratory power assemblies. Its 150A rating is appropriate where a small relay is not enough and a larger 225A or 350A contactor would be oversized.

Selection Guide

Before selecting GX11FA, 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, thermal rise, cable sizing, fuse coordination, and enclosure conditions.

The coil supply should be a stable 48VDC source. If the equipment uses 12VDC control power, GX11BA may be more suitable. If it uses 24VDC control power, a GX11 24V variant should be reviewed. If direct feedback is required, choose a related GX11 model with auxiliary contacts rather than GX11FA.

FAQ

What is GX11FA used for?

GX11FA is used for telecom backup power, compact UPS modules, battery branch isolation, charger paths, and 800VDC-class moderate-current switching.

Is GX11FA a High Voltage DC Contactor?

Yes. GX11FA is a Sensata Gigavac GX11 series High Voltage DC Contactor with 150A current rating and 800VDC maximum switching capability.

What coil voltage does GX11FA use?

GX11FA uses a 48VDC coil. DigiKey lists approximately 28VDC must-operate voltage and 1.8VDC must-release voltage.

Does GX11FA include auxiliary contacts?

No. JB Controls lists GX11FA with no auxiliary contact. Select a related GX11 auxiliary-contact model if status feedback is required.

How is GX11FA different from GX11BA?

GX11FA uses a 48VDC coil, while GX11BA uses a 12VDC coil. Both are GX11 150A High Voltage DC Contactor options with stud terminals and flying leads.

Conclusion

GX11FA is a 150A 800VDC High Voltage DC Contactor for telecom backup power, 48V-controlled energy shelves, compact UPS modules, and moderate-current DC switching assemblies. With its Sensata Gigavac GX11 sealed construction, 48VDC 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 OEM systems that need reliable high-voltage switching with simple 48V control wiring.