Sensata Gigavac GX14CAB

Sensata Gigavac GX14CAB is a 350A 800VDC High Voltage DC Contactor from the GX14 series, designed for emergency vehicles, heavy equipment, industrial DC systems, battery charging platforms, and electric or hybrid vehicle power control. This High Voltage DC Contactor uses an SPST-NO-DM main contact form, a 24VDC dual coil, stud power terminals, 38 cm lead termination, chassis or busbar mounting, normally open auxiliary contact functionality, and hermetically sealed construction. It is a practical option where the system needs high-current 800VDC switching with feedback capability and reliable operation in harsh environments.

GX14CAB is positioned for demanding mobile and industrial equipment where long life, sealed reliability, and efficient coil operation matter. The 350A rating supports substantial DC power paths, while the 800VDC switching class gives engineers useful margin for modern battery and power conversion systems. The sealed GX14 construction helps protect the internal contact chamber from moisture, dust, vibration, and contamination, including harsh environments where open contactor designs may lose reliability over time.

Product Positioning

GX14CAB should be positioned as a rugged High Voltage DC Contactor for emergency vehicles and heavy-duty DC power systems. Compared with smaller GX11 or GX21 contactors, GX14CAB provides a higher 350A current rating. Compared with normally closed GXNC models, GX14CAB uses a normally open main contact, so the DC path remains open until the 24VDC coil is energized.

The normally open auxiliary contact is useful for monitored switching. A vehicle controller, charger controller, or cabinet control board can compare the coil command with auxiliary feedback before enabling downstream loads. In emergency vehicles and heavy equipment, this feedback can support start-up checks, charger interlocks, service lockout, and fault diagnostics.

Key Specifications

• Manufacturer series: Sensata Gigavac GX14
• Part number: GX14CAB
• Product type: High Voltage DC Contactor
• Main contact form: SPST-NO-DM / 1 Form X
• Rated current: 350A
• Maximum switching voltage: 800VDC
• Coil voltage: 24VDC
• Coil type: dual coil
• Power termination: stud terminals
• Control termination: wire leads / 38 cm leads
• Mounting style: chassis mount / busbar mount
• Auxiliary contact: normally open auxiliary contact
• Construction: hermetically sealed
• Operating temperature range: -55°C to +85°C according to distributor data
• Must operate voltage: approximately 16VDC according to DigiKey data
• Must release voltage: approximately 2VDC according to DigiKey data
• Typical operate time: approximately 20ms
• Typical release time: approximately 12ms

Features and Benefits

The main benefit of GX14CAB is its balance of 350A current capacity, 800VDC switching capability, and rugged sealed construction. A High Voltage DC Contactor in this class can control main battery paths, charger outputs, inverter inputs, DC bus sections, and protected branch circuits in equipment that needs more capacity than compact 150A or 225A contactors.

The 24VDC dual coil is well suited to industrial and vehicle control architectures. Many emergency vehicles, utility platforms, battery chargers, and power conversion cabinets use 24VDC auxiliary power for contactors, controllers, sensors, fans, and safety circuits. Selecting GX14CAB allows the contactor coil to fit that existing control system.

The normally open auxiliary contact supports supervised operation. Instead of relying only on coil command, the control system can verify contactor state before enabling a charger, motor controller, inverter, or DC branch. This can improve sequencing and diagnostics in equipment where unexpected switching behavior must be detected quickly.

Stud terminals provide secure connection points for high-current cables or busbars. The 38 cm leads allow the coil and auxiliary wiring to route to a nearby harness, controller, or interlock board. This installation style works well when the High Voltage DC Contactor must be mounted close to the power conductors while low-voltage control wiring is routed separately.

Applications

GX14CAB is especially suitable for emergency vehicles and heavy equipment power systems. In an emergency vehicle, utility truck, mobile power platform, or industrial machine, this High Voltage DC Contactor can connect a battery pack, isolate an inverter input, switch a charger branch, or disconnect a protected DC load during service and fault conditions.

The contactor can also be used in battery charging equipment, electric and hybrid vehicles, industrial power systems, DC distribution panels, backup power assemblies, and high-current power conversion equipment. Its 350A rating makes it useful for applications where a 150A or 225A device is too small, while a 600A contactor would be oversized.

Selection Guide

Before selecting GX14CAB, confirm maximum DC voltage, continuous current, peak current, inrush current, switching frequency, and load type. This High Voltage DC Contactor is intended for 350A and up to 800VDC switching, but final suitability depends on precharge design, cable sizing, busbar layout, thermal rise, fuse coordination, and operating environment.

The coil supply should be a stable 24VDC source. Designers should verify auxiliary contact wiring, lead routing, terminal clearance, mounting orientation, vibration exposure, and service access. If the design requires a normally closed default state, a GXNC model should be reviewed instead. If a lower current rating is enough, GX11, GX12, or GX21 variants may be more compact.

FAQ

What is GX14CAB used for?

GX14CAB is used for emergency vehicles, heavy equipment, battery charging systems, inverter inputs, industrial DC buses, and 800VDC-class high-current switching.

Is GX14CAB a High Voltage DC Contactor?

Yes. GX14CAB is a Sensata Gigavac GX14 series High Voltage DC Contactor with 350A current rating and 800VDC maximum switching capability.

What coil voltage does GX14CAB use?

GX14CAB uses a 24VDC dual coil, making it suitable for equipment with a 24V auxiliary control supply.

Does GX14CAB include auxiliary contacts?

Yes. Sensata describes GX14CAB with a normally open auxiliary contact, and DigiKey lists auxiliary contacts among its features.

How is GX14CAB different from GXNC14CA?

GX14CAB is a normally open GX14 contactor with N.O. auxiliary feedback, while GXNC14CA is a normally closed GXNC14 contactor for default-closed switching logic.

Conclusion

GX14CAB is a 350A 800VDC High Voltage DC Contactor for emergency vehicles, heavy equipment, battery charging platforms, and industrial DC power systems. With its Sensata Gigavac GX14 sealed construction, 24VDC dual coil, stud terminals, 38 cm leads, chassis or busbar mounting, and normally open auxiliary contact, it is a practical choice for OEM systems that need rugged high-current DC switching with monitored feedback.