Sensata Gigavac GX21CC DC Contactor Overview

The Sensata Gigavac GX21CC is a sealed hermetic DC contactor from the GX21 Series, designed for reliable high-voltage DC switching in compact power systems. It provides a 150A contact rating, 800VDC maximum switching voltage, 24VDC coil operation, chassis mounting, and stud with wire lead termination. 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 24VDC refers to the coil voltage used to operate the contactor.

Product Description

The Sensata Gigavac GX21CC DC contactor is designed for dependable high-voltage DC switching where sealed protection, compact size, and stable current handling are required. As part of the GX21 Series, this model supports 150A contact current and up to 800VDC maximum switching voltage. It is commonly used in EV power systems, energy storage equipment, DC distribution cabinets, marine electrical systems, solar power equipment, and industrial battery control modules.

The GX21CC uses an SPST-NO main contact arrangement, also described as 1 Form X. The main contact remains open when the coil is not energized and closes when the 24VDC coil receives the correct control signal. This allows a low-voltage control circuit to manage a higher-voltage DC power path. The 800VDC value belongs to the main switching circuit, while the 24VDC value belongs only to the coil circuit.

A key advantage of the Sensata Gigavac GX21CC is its hermetically sealed construction. The sealed contact chamber helps protect the internal contact system from dust, moisture, oxidation, and contaminated environments. This makes the GX21CC suitable for harsh operating conditions, including mobile equipment, outdoor systems, battery packs, and industrial power assemblies where open-frame contactors may have reduced service life.

The GX21 Series is known for long-term switching performance and compact installation flexibility. The GX21CC uses chassis mounting with stud and wire lead termination, making it suitable for harness-based installation inside battery disconnect boxes, control cabinets, or power distribution assemblies. The 20 ms operate time and 12 ms release time also support responsive control in power switching and protection circuits.

Key Features

• Genuine Sensata Gigavac GX21 Series DC contactor
• 150A contact rating for DC power control
• 800VDC maximum switching voltage for high-voltage systems
• 24VDC coil for control circuit operation
• SPST-NO main contact form for normally open switching
• Hermetically sealed construction for harsh environments
• Stud and wire lead termination for secure installation
• 20 ms operate time and 12 ms release time
• Wide operating temperature range from -55°C to 85°C
• Suitable for EV, ESS, solar, marine, and industrial DC systems

Applications

The GX21CC DC contactor is suitable for systems that need reliable connection and disconnection of high-voltage DC battery, load, or charging circuits. 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 GX21CC 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 and stable switching performance are required.

Why Choose Sensata Gigavac GX21CC

The Sensata Gigavac GX21CC is a strong option when the system requires 150A current capacity, up to 800VDC switching voltage, 24VDC coil operation, sealed construction, chassis mounting, and stud with wire lead termination. Compared with lower-voltage relays, this model is better suited for battery and DC bus applications. Compared with open-frame contactors, the sealed hermetic structure helps improve reliability in vibration, moisture, and contamination-prone environments.

For replacement and maintenance projects, GX21CC should be selected when the original system requires GX21 Series performance with 150A contact rating, 800VDC maximum switching voltage, 24VDC coil voltage, chassis mounting, and stud/wire lead termination. Before ordering, confirm coil voltage, load current, switching voltage, mounting space, terminal style, and control circuit requirements.

FAQ

Q1: What is the full product name of GX21CC?
A1: The full product name is Sensata Gigavac GX21CC DC Contactor.

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

Q3: What does 24VDC mean?
A3: 24VDC 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: What is the contact form?
A5: The contact form is SPST-NO, also described as 1 Form X.

Q6: Where is GX21CC commonly used?
A6: It is commonly used in EV systems, battery energy storage, DC power distribution, solar equipment, marine systems, and industrial DC control modules.