Sensata Gigavac HX22CAB

Sensata Gigavac HX22CAB is a 300A 1500VDC High Voltage DC Contactor from the HX22 series, designed for fuel cell DC systems, hydrogen power modules, high-voltage auxiliary buses, and compact electric power conversion units. This High Voltage DC Contactor uses an SPST-NO-DM main contact form, a 24VDC coil, stud power terminals, flying lead control wiring, chassis mounting, normally open auxiliary feedback, and hermetically sealed construction. It is a practical choice when the design needs 1500VDC insulation capability, 300A current capacity, and monitored switching in a compact cabinet or vehicle power bay.

HX22CAB is different from a generic charger or inverter contactor page because its best positioning is as a supervised isolation device for fuel cell support circuits and high-voltage auxiliary distribution. Fuel cell power systems often include DC/DC converters, compressor drives, cooling equipment, battery buffer interfaces, and safety disconnect points. A High Voltage DC Contactor such as HX22CAB can provide controlled connection and isolation for these power paths while keeping the low-voltage control side compatible with common 24V systems.

Product Positioning

HX22CAB should be positioned as a 24V coil High Voltage DC Contactor for fuel cell power modules and high-voltage auxiliary DC systems. Compared with HX22CBB, which can be positioned around outdoor renewable energy disconnect panels, HX22CAB is better differentiated around hydrogen power, auxiliary HV buses, and compact vehicle energy modules. Compared with HX21 models, HX22CAB remains in the 300A current class rather than the 350A class.

The normally open auxiliary contact gives the controller a feedback path for state confirmation. In a fuel cell or hybrid power module, this feedback can help verify whether the contactor has followed the coil command before enabling a DC/DC converter, compressor inverter, charger branch, or battery coupling circuit. This makes the High Voltage DC Contactor useful where switching status is part of the system safety sequence.

Key Specifications

• Manufacturer series: Sensata Gigavac HX22
• Part number: HX22CAB
• Product type: High Voltage DC Contactor
• Main contact form: SPST-NO-DM / 1 Form X
• Rated current: 300A
• Nominal switching voltage: 1500VDC
• Coil voltage: 24VDC
• Coil type: DC coil
• Power termination: stud terminals
• Control termination: flying leads / wire leads
• Mounting style: chassis mount / upright mount
• Auxiliary contact: normally open auxiliary contact according to distributor listing
• Construction: hermetically sealed
• Operating temperature range: -55°C to +85°C according to HX series data
• Typical operate time: approximately 20ms according to related HX series data
• Typical release time: approximately 7-12ms according to distributor and series data

Features and Benefits

The 1500VDC rating is the primary reason to select HX22CAB for advanced power modules. Fuel cell stacks, battery buffers, and converter links may operate at elevated DC voltage, so ordinary low-voltage relays are not appropriate. This High Voltage DC Contactor gives the system designer a sealed switching component for demanding DC isolation.

The 300A current rating is suitable for medium-high current auxiliary paths. It can support converter inputs, fuel cell output branches, battery coupling circuits, and service disconnect functions where the current requirement is significant but does not call for a larger 350A or 400A contactor.

The 24VDC coil matches many vehicle and industrial control platforms. Fuel cell skids, mobile power units, and high-voltage cabinets commonly use 24VDC for controllers, sensors, pumps, fans, contactors, and protection relays. Using HX22CAB helps avoid a separate control voltage just for the switching device.

The normally open auxiliary feedback supports monitored operation. Instead of relying only on a coil command, the controller can check the auxiliary signal before allowing the next power-stage action. This can improve diagnostics during start-up, shutdown, service lockout, and fault recovery.

Hermetically sealed construction helps protect the contact chamber from humidity, dust, and airborne contamination. This is important for power modules that may operate in vehicle compartments, industrial rooms, outdoor enclosures, or mobile energy systems where vibration and environmental changes are common.

Applications

HX22CAB is especially suitable for fuel cell DC systems and hydrogen power modules. In a fuel cell power unit, this High Voltage DC Contactor can isolate a high-voltage output, connect a DC/DC converter input, switch a battery buffer branch, or disconnect an auxiliary high-voltage bus during service and fault response.

The contactor can also be used in hybrid vehicle power boxes, industrial high-voltage cabinets, mobile charging support systems, battery interface equipment, and power conversion modules. Its 300A rating and 1500VDC capability make it useful where compact size, high-voltage insulation, and monitored control are required together.

Selection Guide

Before selecting HX22CAB, confirm maximum DC voltage, continuous current, short-term current, inrush profile, and switching duty. Fuel cell and converter circuits may include capacitance, precharge timing, fault-current limits, and isolation monitoring that affect contactor stress. The High Voltage DC Contactor should be reviewed with the complete power architecture.

Use HX22CAB when the system has a 24VDC control supply and needs normally open auxiliary feedback. If the design does not need feedback, a no-auxiliary HX22 version may simplify wiring. If current demand is above the 300A class, HX21 or HX24 alternatives should be checked.

FAQ

What is HX22CAB used for?

HX22CAB is used for fuel cell DC systems, high-voltage auxiliary buses, battery interfaces, converter inputs, and 1500VDC-class monitored switching.

Is HX22CAB a High Voltage DC Contactor?

Yes. HX22CAB is an HX22 series High Voltage DC Contactor rated for 300A and 1500VDC-class switching.

What coil voltage does HX22CAB use?

HX22CAB uses a 24VDC coil, making it suitable for vehicle, fuel cell, and industrial control systems with a 24V auxiliary supply.

Does HX22CAB include auxiliary feedback?

Yes. Distributor data identifies HX22CAB with a normally open auxiliary contact configuration.

How is HX22CAB different from HX22CBB?

Both are HX22 300A 1500VDC contactors with 24VDC coils and normally open auxiliary feedback. HX22CAB should be selected by its exact ordering-code lead and configuration requirements, and can be positioned for fuel cell or high-voltage auxiliary power systems.

Conclusion

HX22CAB is a 300A 1500VDC High Voltage DC Contactor for fuel cell power modules, high-voltage auxiliary buses, battery interface circuits, and compact power conversion equipment. With its Sensata Gigavac HX22 sealed construction, 24VDC coil, stud terminals, flying leads, chassis mounting, and normally open auxiliary feedback, it provides a monitored switching option for advanced DC power systems that need reliable 1500VDC-class isolation.