Sensata Gigavac GX21CC

Sensata Gigavac GX21CC is a 150A 800VDC High Voltage DC Contactor from the GX21 series, designed for compact DC power systems that require reliable isolation at moderate current levels. This High Voltage DC Contactor uses an SPST-NO-DM contact form, a 24VDC coil, stud power terminals, wire lead control termination, chassis mounting, and hermetically sealed construction. It is a practical option for auxiliary battery systems, compact electric platforms, marine DC panels, industrial DC controls, and power conversion equipment where 800VDC voltage capability is needed without moving to a larger 400A contactor.

GX21CC fills the space between miniature high-voltage contactors and heavy-duty main power contactors. Its 150A rating supports meaningful DC load control, while its 800VDC maximum switching voltage gives engineers useful design margin for elevated-voltage DC systems. The sealed construction helps protect the internal contact system from dust, moisture, and contamination, making this High Voltage DC Contactor suitable for enclosed industrial equipment and mobile power assemblies.

Product Positioning

GX21CC should be positioned as a compact 24V coil High Voltage DC Contactor for moderate-current DC switching. It is not intended to replace 400A GV24 or HX24 contactors in main high-current battery paths. Instead, it is better matched to auxiliary DC buses, charger interface circuits, smaller inverter inputs, power distribution branches, and service isolation functions where 150A capacity is appropriate.

The 24VDC coil is convenient for equipment that already uses a 24V auxiliary control supply. Many industrial cabinets, battery management systems, marine electrical panels, utility vehicles, and power conversion modules use 24VDC for control logic. In those systems, GX21CC can be integrated without adding a separate coil power architecture. The stud and wire lead format also supports flexible installation in compact equipment bays.

Key Specifications

• Manufacturer series: Sensata Gigavac GX21
• Part number: GX21CC
• Product type: High Voltage DC Contactor
• Contact form: SPST-NO-DM / 1 Form X
• Rated current: 150A
• Maximum switching voltage: 800VDC
• Coil voltage: 24VDC
• Coil current: approximately 280mA according to distributor data
• Coil power: approximately 6.8W according to distributor data
• Coil resistance: approximately 85.71 ohms according to distributor data
• Termination style: stud terminals and wire leads
• Mounting type: chassis mount
• 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 key benefit of GX21CC is its combination of 800VDC switching capability and a 150A current rating in a compact GX21 package. A High Voltage DC Contactor in this range is useful when the circuit is more demanding than a small relay can handle, but does not require the size and cost of a larger 400A platform.

The normally open contact behavior supports controlled energization. The power path remains open until the 24VDC coil is energized, allowing the system controller to connect the load only when operating conditions are correct. This is useful for charger enable circuits, auxiliary battery outputs, inverter inputs, and protected distribution branches.

Stud terminals provide secure high-current connection points for cables or busbars. Wire leads make the control connection easy to route inside cabinets, compact vehicles, and custom power assemblies. This connection style gives designers more installation flexibility than a purely PCB-mounted contactor.

Hermetically sealed construction helps the High Voltage DC Contactor maintain stable operation in environments where contamination can reduce contact life. Dust, humidity, and airborne particles are common in marine compartments, industrial cabinets, outdoor equipment, and mobile platforms. A sealed design helps reduce those risks and supports long-term switching reliability.

Applications

GX21CC is especially suitable for compact DC power systems and auxiliary high-voltage switching. In a marine or mobile power panel, this High Voltage DC Contactor can connect a battery branch, isolate an inverter input, switch a charger circuit, or disconnect a protected load during service. The 150A rating is useful for moderate-current equipment where a 50A MiniTACTOR is too small and a 400A contactor is unnecessary.

It can also be used in industrial DC distribution, battery test equipment, low-current energy storage branches, charger support modules, and power conversion cabinets. For development benches or production systems, GX21CC can provide a controlled switching point for 800VDC-class circuits when the real load current remains within the 150A rating.

Selection Guide

Before selecting GX21CC, confirm the maximum DC voltage, continuous current, peak current, inrush current, and switching duty. This High Voltage DC Contactor is listed for 800VDC maximum switching and 150A contact rating, but final suitability depends on load type, circuit energy, cable sizing, thermal rise, protection devices, and expected duty cycle.

The coil supply should be a stable 24VDC source. Distributor data lists 16VDC must-operate voltage and 0.5VDC must-release voltage, which should be considered when designing the coil driver. If the system uses 12VDC or 48VDC control power, another GX21 coil option may be more suitable.

Designers should also verify mounting space, stud terminal clearance, wire lead routing, insulation spacing, and enclosure conditions. Capacitive loads may need a precharge circuit before the main contactor closes. If the application requires direct auxiliary feedback, confirm the exact GX21 configuration before ordering.

FAQ

What is GX21CC used for?

GX21CC is used for 800VDC-class moderate-current switching in compact DC systems, auxiliary battery circuits, charger interfaces, inverter inputs, and industrial DC distribution branches.

Is GX21CC a High Voltage DC Contactor?

Yes. GX21CC is a Sensata Gigavac GX21 series High Voltage DC Contactor with 150A contact rating and 800VDC maximum switching voltage.

What coil voltage does GX21CC use?

GX21CC uses a 24VDC coil. Distributor data lists approximately 280mA coil current and 6.8W coil power.

What termination style does GX21CC use?

GX21CC uses stud terminals for the power path and wire leads for the coil/control connection, with chassis mounting.

How is GX21CC different from GV24 contactors?

GX21CC is a 150A GX21 contactor for moderate-current 800VDC switching, while many GV24 models are 400A contactors for higher-current DC power paths.

Conclusion

GX21CC is a compact 150A 800VDC High Voltage DC Contactor for auxiliary battery systems, compact DC distribution, charger support circuits, inverter inputs, and industrial power modules. With its Sensata Gigavac GX21 sealed construction, 24VDC coil, stud terminals, wire leads, chassis mounting, and normally open switching behavior, it offers a practical solution for OEM designs that need reliable high-voltage DC isolation without the size of a larger main power contactor.