Sensata Gigavac GX11KA DC Contactor

The Sensata Gigavac GX11KA is a sealed hermetic DC contactor from the GX11 Series, designed for 150A current switching in power systems up to 800VDC. It uses a 120VAC control coil, chassis mounting, stud and wire lead termination, and no auxiliary contact. This model is suitable for electric vehicles, battery energy storage systems, industrial DC power distribution, marine power control, solar equipment, power management systems, and OEM battery disconnect modules. In this model, 800VDC refers to the main contact switching voltage, while 120VAC refers to the coil voltage used to operate the contactor.

Product Description

The Sensata Gigavac GX11KA DC contactor is designed for reliable high-voltage DC switching in compact battery and power control systems. As part of the GX11 Series, this model provides a 150A contact current rating and up to 800VDC maximum switching voltage. It is commonly used in electric vehicles, battery energy storage systems, solar power equipment, marine power systems, industrial DC cabinets, and OEM battery disconnect assemblies.

The GX11KA uses an SPST-NO main contact arrangement, also described as 1 Form X. The main power contact remains open when the coil is not energized and closes when the 120VAC coil receives the correct control signal. This allows an AC control circuit to manage a high-voltage DC load path. The 800VDC value belongs to the main switching circuit, while the 120VAC value belongs only to the coil control circuit.

A key advantage of the Sensata Gigavac GX11KA is its sealed hermetic construction. The sealed contact chamber helps protect the internal contact system from dust, humidity, oxidation, and contamination. This makes the GX11KA suitable for mobile equipment, outdoor battery systems, industrial power modules, and vehicle platforms where vibration, moisture, and harsh operating conditions can reduce the service life of ordinary open-frame contactors.

The K coil code indicates a 120VAC coil version. This is different from common DC coil versions such as 12VDC, 24VDC, or 48VDC. The GX11KA should be selected only when the control system is designed to operate a 120VAC coil. Before replacing a DC coil contactor with this model, confirm the control voltage and wiring method carefully.

This model uses stud and wire lead termination for harness-based installation. Since GX11KA does not include an auxiliary contact, it is best suited for systems where separate contact feedback is not required or where contactor status is monitored through another method.

Key Features

• Genuine Sensata Gigavac GX11 Series DC contactor
• 150A contact rating for DC power control
• 800VDC maximum switching voltage for high-voltage systems
• 120VAC coil for AC control circuit operation
• SPST-NO main contact form for normally open switching
• No auxiliary contact for simplified circuit designs
• Hermetically sealed construction for harsh environments
• Stud and wire lead termination for harness-based installation
• 30 ms operate time and 50 ms release time
• Suitable for EV, ESS, solar, marine, and industrial DC systems

Applications

The GX11KA DC contactor is suitable for systems that need reliable connection and disconnection of DC battery, load, or charging circuits while using a 120VAC control supply. Typical applications include electric vehicles, battery energy storage systems, solar power equipment, DC power cabinets, marine battery systems, UPS battery modules, material handling equipment, and industrial automation systems.

In a battery system, the Sensata Gigavac GX11KA can be used as a main contactor, charge contactor, load disconnect contactor, or safety isolation device depending on the electrical design. Its 150A current rating makes it a good fit for medium-current DC platforms where sealed construction, compact size, and stable switching performance are required.

Why Choose Sensata Gigavac GX11KA

The Sensata Gigavac GX11KA is a practical option when the system requires 150A current capacity, up to 800VDC switching voltage, 120VAC coil operation, sealed construction, wire lead termination, and no auxiliary contact. Compared with DC coil versions, this model is specifically suited for control systems that use an AC coil supply.

For replacement and maintenance projects, GX11KA should be selected when the original system requires GX11 Series performance with 150A contact rating, 800VDC maximum switching voltage, 120VAC coil voltage, chassis mounting, stud and wire lead termination, and no auxiliary contact. Before ordering, confirm coil voltage, auxiliary contact requirement, load current, switching voltage, mounting space, and terminal requirements.

FAQ

Q1: What is the full product name of GX11KA?
A1: The full product name is Sensata Gigavac GX11KA DC Contactor.

Q2: What is the main switching voltage?
A2: The main switching voltage is up to 800VDC maximum.

Q3: What does 120VAC mean?
A3: 120VAC is the coil voltage used to operate the contactor, not the main load voltage.

Q4: What is the current rating?
A4: The contact rating current is 150A.

Q5: Does GX11KA include an auxiliary contact?
A5: No. GX11KA does not include an auxiliary contact.

Q6: What is the difference between GX11KA and GX11CA?
A6: GX11KA uses a 120VAC coil, while GX11CA uses a 24VDC coil.