Sensata Gigavac GX66CDB DC Contactor

The Sensata Gigavac GX66CDB is a sealed hermetic DC contactor from the GX66 Series, designed for high-current switching in power systems up to 800VDC. It provides a 600A contact rating, 24VDC coil operation, chassis mounting, M4 screw control terminals, and a normally open 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 24VDC refers to the coil voltage used to operate the contactor.

Product Description

The Sensata Gigavac GX66CDB DC contactor is designed for reliable high-current switching in demanding DC power systems. As part of the GX66 Series, this model supports a 600A contact current rating and up to 800VDC maximum switching voltage. It is commonly used in electric vehicles, energy storage systems, power management systems, industrial DC cabinets, marine electrical systems, solar power equipment, and battery disconnect applications.

The GX66CDB 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 voltage. This allows a low-voltage control circuit to manage a high-current DC power path. The 800VDC value belongs to the main switching circuit, while the 24VDC value belongs only to the coil control circuit.

A key advantage of the Sensata Gigavac GX66CDB is its hermetically sealed EPIC construction. The sealed contact chamber helps protect the internal contact system from dust, moisture, oxidation, and contamination. The GX66 Series is designed for harsh environments and is listed with IP67 and IP69K sealing performance, making it suitable for mobile equipment, outdoor systems, battery packs, and industrial power assemblies.

The GX66CDB also includes a normally open auxiliary contact. This auxiliary contact can provide contactor status feedback to a controller, battery management system, or safety circuit after the main contact changes state. Compared with GX66CD, which has no auxiliary contact, GX66CDB is better suited for systems that need diagnostics, interlock logic, or contactor position confirmation.

This model uses screw terminal connection with M4 coil screw terminals. The configuration is practical for battery boxes, power distribution modules, EV control cabinets, and industrial assemblies where secure wiring and serviceable terminals are preferred over flying leads or connectorized control wiring.

Key Features

• Genuine Sensata Gigavac GX66 Series DC contactor
• 600A contact rating for high-current DC power control
• 800VDC maximum switching voltage for battery and DC bus systems
• 24VDC coil with internal coil suppression
• SPST-NO main contact form for normally open switching
• SPST normally open auxiliary contact for feedback or interlock use
• Hermetically sealed EPIC construction for harsh environments
• M4 screw control terminals for serviceable wiring
• IP67 and IP69K environmental sealing
• Suitable for EV, ESS, marine, solar, and industrial DC systems

Applications

The GX66CDB DC contactor is suitable for systems that need reliable connection and disconnection of high-current 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 GX66CDB can be used as a main contactor, charge contactor, load disconnect contactor, or safety isolation device depending on the electrical design. Its 600A current rating makes it a strong fit for high-current DC platforms where sealed construction, auxiliary feedback, and stable switching performance are required.

Why Choose Sensata Gigavac GX66CDB

The Sensata Gigavac GX66CDB is a strong option when the system requires 600A current capacity, up to 800VDC switching voltage, 24VDC coil operation, sealed construction, screw terminal wiring, and a normally open auxiliary contact. Compared with versions without auxiliary feedback, this model gives the control system an additional status signal for diagnostics or interlock logic.

For replacement and maintenance projects, GX66CDB should be selected when the original system requires GX66 Series performance with 600A contact rating, 800VDC maximum switching voltage, 24VDC coil voltage, screw terminal connection, and normally open auxiliary contact. Before ordering, confirm coil voltage, auxiliary contact logic, load current, switching voltage, mounting space, and terminal requirements.

FAQ

Q1: What is the full product name of GX66CDB?
A1: The full product name is Sensata Gigavac GX66CDB 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 600A.

Q5: Does GX66CDB include an auxiliary contact?
A5: Yes. GX66CDB includes an SPST normally open auxiliary contact.

Q6: What is the difference between GX66CDB and GX66CD?
A6: GX66CDB includes a normally open auxiliary contact, while GX66CD has no auxiliary contact.