Sensata Gigavac HX21CC

Sensata Gigavac HX21CC is a 350A 1500VDC High Voltage DC Contactor from the HX21 series, designed for industrial DC distribution, high-voltage cabinet wiring, inverter input isolation, and battery power control systems that need long control leads without auxiliary feedback. This High Voltage DC Contactor uses an SPST-NO-DM main contact form, a 24VDC coil, stud power terminals, 122 cm flying lead control termination, chassis mounting, no auxiliary contact, and hermetically sealed construction. It is a practical option where a cabinet builder needs 1500VDC-class switching with a simple coil-only control interface.

HX21CC differs from monitored HX21 variants such as HX21CCB and HX21CCC because it does not include auxiliary contact feedback. That makes it suitable for systems where the controller verifies operation through bus voltage, current sensing, load response, or external instrumentation. The 122 cm flying leads are useful in larger power cabinets where the High Voltage DC Contactor must be mounted near the DC bus while the control electronics sit in a separate low-voltage compartment.

Product Positioning

HX21CC should be positioned as a long-lead, no-auxiliary High Voltage DC Contactor for 1500VDC-class industrial DC distribution. Compared with HX21CA and HX21CB, this model provides longer 122 cm flying leads for more flexible cabinet routing. Compared with HX21CCB or HX21CCC, HX21CC keeps the control harness simpler by omitting auxiliary contact wiring.

The 350A current rating gives HX21CC enough capacity for substantial DC branches, inverter inputs, charger paths, and battery cabinet power sections. It is stronger than HX22 300A models while remaining below 400A HX24 configurations. This makes the High Voltage DC Contactor useful when the application needs a balanced 350A rating and high voltage margin.

Key Specifications

• Manufacturer series: Sensata Gigavac HX21
• Part number: HX21CC
• Product type: High Voltage DC Contactor
• Main contact form: SPST-NO-DM / 1 Form X
• Rated current: 350A
• Nominal switching voltage: 1500VDC
• Coil voltage: 24VDC
• Coil current: approximately 90mA according to DigiKey data
• Coil power: approximately 2.1W according to DigiKey data
• Coil resistance: approximately 266.67 ohms according to DigiKey data
• Power termination: stud terminals
• Control termination: flying leads / wire leads
• Lead length: 122 cm / 48 in according to JB Controls listing
• Mounting style: chassis mount / upright mount
• Auxiliary contact: none
• Construction: hermetically sealed
• Operating temperature range: -55°C to +85°C
• Must operate voltage: approximately 16VDC
• Must release voltage: approximately 2VDC
• Typical operate time: approximately 20ms
• Typical release time: approximately 12ms

Features and Benefits

The main benefit of HX21CC is its 1500VDC switching capability in a 350A no-auxiliary configuration. A High Voltage DC Contactor in this class can control high-voltage DC paths where 800V contactors may not provide enough rating margin. It is suitable for industrial power cabinets, inverter systems, battery racks, and high-voltage DC distribution equipment.

The 24VDC coil matches common industrial control architectures. Many power cabinets use 24VDC for controllers, sensors, relays, fans, and protection circuits. Selecting HX21CC allows the High Voltage DC Contactor coil to operate from the same auxiliary supply without requiring a separate 48V or 12V control rail.

The long 122 cm flying leads are valuable in cabinet layouts where physical separation is required between the high-voltage power section and the low-voltage control compartment. The contactor can be mounted close to busbars or high-current cables, while the coil leads route back to the control harness. This can simplify service access and improve wiring organization.

The no-auxiliary-contact configuration keeps the control circuit focused. In many industrial DC distribution systems, contactor state can be inferred from voltage sensing, current measurement, PLC logic, or system response. If that is the intended diagnostic method, HX21CC avoids unnecessary auxiliary feedback wiring.

Hermetically sealed construction helps protect the internal contact chamber from moisture, dust, and contamination. A sealed High Voltage DC Contactor is useful in power conversion rooms, charging cabinets, industrial enclosures, and battery systems where long service life and stable switching performance are important.

Applications

HX21CC is especially suitable for industrial DC distribution cabinets. In a high-voltage cabinet, this High Voltage DC Contactor can isolate a DC bus section, switch an inverter input, control a charger branch, or disconnect a protected battery path during service and fault events. The 350A rating supports substantial current while the 1500VDC voltage class supports modern elevated-voltage systems.

The contactor can also be used in battery energy storage, renewable energy conversion equipment, charger support modules, high-voltage test benches, and power conversion platforms. Its long flying leads make it useful where the contactor is installed in a power bay and the controller is mounted remotely.

Selection Guide

Before selecting HX21CC, confirm maximum DC bus voltage, continuous current, peak current, inrush current, switching duty, and load type. This High Voltage DC Contactor is intended for 350A and 1500VDC-class systems, but final suitability depends on precharge design, DC arc energy, cable sizing, busbar layout, fuse coordination, thermal rise, and enclosure conditions.

The coil supply should be a stable 24VDC source. Designers should verify coil driver capacity, lead routing, terminal clearance, mounting orientation, vibration exposure, and service access. If direct feedback is required, use HX21CCB for normally open auxiliary feedback or HX21CCC for normally closed auxiliary feedback instead of HX21CC.

FAQ

What is HX21CC used for?

HX21CC is used for industrial DC distribution, inverter inputs, charger branches, battery cabinet isolation, and 1500VDC-class high-voltage switching.

Is HX21CC a High Voltage DC Contactor?

Yes. HX21CC is a Sensata Gigavac HX21 series High Voltage DC Contactor with 350A current rating and 1500VDC nominal switching capability.

What coil voltage does HX21CC use?

HX21CC uses a 24VDC coil. DigiKey lists approximately 90mA coil current and 2.1W coil power.

Does HX21CC include auxiliary contacts?

No. JB Controls lists HX21CC with no auxiliary contact. If feedback is required, related HX21CCB or HX21CCC variants should be reviewed.

How is HX21CC different from HX21CCB?

HX21CC has no auxiliary contact, while HX21CCB includes normally open auxiliary feedback. Both are HX21 350A 1500VDC High Voltage DC Contactor options with 24VDC coil and 122 cm leads.

Conclusion

HX21CC is a 350A 1500VDC High Voltage DC Contactor for industrial DC distribution, battery cabinets, inverter inputs, charger branches, and remote-wired power assemblies. With its Sensata Gigavac HX21 sealed construction, 24VDC coil, stud terminals, 122 cm flying leads, chassis mounting, and no-auxiliary-contact configuration, it is a practical choice for OEM systems that need reliable high-voltage DC switching with a simple long-lead control interface.