Sensata Gigavac GX21KC

Sensata Gigavac GX21KC is a GX21 series High Voltage DC Contactor designed for AC-controlled DC power panels, industrial service cabinets, test equipment, and high-voltage DC systems that use a 120VAC control circuit. This High Voltage DC Contactor provides a 150A current rating, 800VDC maximum switching voltage, 120VAC coil, SPST-NO double-make contact form, 48 inch flying leads, stand-up mounting, and hermetically sealed EPIC construction. For equipment that switches DC power but uses AC control wiring, the GX21KC High Voltage DC Contactor is a focused configuration.

The GX21KC High Voltage DC Contactor is different from common 12VDC or 24VDC coil variants. Its 120VAC coil makes it useful in industrial cabinets where a PLC panel, control transformer, or facility control circuit provides AC control power. This High Voltage DC Contactor can be used to switch a high-voltage DC branch while still fitting a traditional AC control architecture.

Product Positioning

GX21KC is positioned as an AC-control High Voltage DC Contactor for industrial DC panels and test racks. It is not the best match for small battery packs that only provide DC auxiliary power. Instead, this High Voltage DC Contactor is suitable for equipment where control wiring is already based on 120VAC and the switched load is a DC circuit up to the 800VDC class.

The 48 inch flying leads are also important. Long leads allow the High Voltage DC Contactor to be mounted near the DC power path while the coil wiring reaches a control terminal block or panel harness. This makes the GX21KC High Voltage DC Contactor useful in larger enclosures where power components and control components are separated.

Key Specifications

• Model: GX21KC
• Brand: Sensata-Gigavac
• Series: GX21
• Product type: High Voltage DC Contactor
• Current rating: 150A High Voltage DC Contactor class
• Switching voltage: 800VDC maximum High Voltage DC Contactor class
• Coil voltage: 120VAC coil for High Voltage DC Contactor control
• Contact form: SPST-NO-DM / 1 Form X
• Coil termination: 122cm / 48 inch flying leads
• Auxiliary contact: none by GX21 order-code reference for GX21KC
• Mounting style: stand-up / chassis mount
• Construction: hermetically sealed EPIC High Voltage DC Contactor design
• Typical role: AC-controlled DC panel contactor, DC test rack contactor, industrial service contactor

Features and Benefits

The first benefit of GX21KC is 120VAC coil control. Many industrial cabinets use AC control transformers and 120VAC relays. A 120VAC coil High Voltage DC Contactor can integrate into those systems without adding a DC coil power supply. This makes the GX21KC High Voltage DC Contactor useful for retrofit panels and facility-connected equipment.

The second benefit is stand-up mounting. The GX21 family is known for stand-up mounting with an integrated safety cover. This can simplify installation because the High Voltage DC Contactor can be mounted in a cabinet without specially routed busbars or unusual lug geometry. The layout supports service access in industrial DC panels.

The third benefit is long lead routing. The 48 inch flying leads give the installer flexibility to route the High Voltage DC Contactor coil wiring to a remote terminal strip. This is valuable in test racks, battery conditioning cabinets, and larger control panels where the DC power section is separated from the control section.

The fourth benefit is sealed EPIC construction. A High Voltage DC Contactor in an industrial cabinet may face dust, temperature variation, airflow contamination, or service exposure. The sealed contact chamber helps protect switching performance and supports long-term operation in demanding environments.

Applications

GX21KC is suitable for industrial DC power panels that need a High Voltage DC Contactor controlled by 120VAC. It can be used in DC test racks, charger maintenance cabinets, battery validation equipment, inverter service panels, and facility-connected DC distribution systems. The High Voltage DC Contactor can switch a 150A DC branch while the control cabinet uses AC logic.

In battery test labs, the GX21KC High Voltage DC Contactor can control the connection between a DC source and a test fixture. In industrial service equipment, this High Voltage DC Contactor can provide controlled isolation for a DC bus, charger output, or protected load. It should be selected with attention to voltage, current, coil power, lead routing, enclosure layout, and safety interlocks.

Selection Guide

Select GX21KC when the system requires a 150A High Voltage DC Contactor, 800VDC maximum switching voltage, 120VAC coil control, 48 inch flying leads, and no auxiliary contact. If the control system uses 12VDC or 24VDC, choose another GX21 High Voltage DC Contactor variant. If auxiliary feedback is needed, select a suffix with the required normally open or normally closed auxiliary contact.

FAQ

Is GX21KC a High Voltage DC Contactor?

Yes. GX21KC is a Sensata-Gigavac GX21 High Voltage DC Contactor rated for 150A and 800VDC maximum switching.

What coil voltage does this High Voltage DC Contactor use?

This High Voltage DC Contactor uses a 120VAC coil.

Does GX21KC include auxiliary contacts?

GX21KC should be treated as a no-auxiliary High Voltage DC Contactor based on the GX21 order-code reference.

Where is this High Voltage DC Contactor commonly used?

It is commonly used in AC-controlled DC panels, test racks, service cabinets, battery validation systems, and industrial DC distribution equipment.

Conclusion

Sensata Gigavac GX21KC is a 150A, 800VDC High Voltage DC Contactor with 120VAC coil control, SPST-NO contact form, 48 inch flying leads, stand-up mounting, and hermetically sealed EPIC construction. It is a practical High Voltage DC Contactor for industrial DC panels, AC-controlled test equipment, charger service cabinets, and facility-connected high-voltage DC systems.