Sensata Gigavac GX14CCB

The Sensata Gigavac GX14CCB is a GX14 Series hermetically sealed DC power contactor designed for reliable high-current switching in harsh DC power environments. This model is configured with a 350 A current rating, 800VDC maximum switching voltage, a 24VDC coil, 48 inch flying leads, an SPST-NO main contact, and an SPST-NO normally open auxiliary contact. The 800VDC value refers to the main power/load circuit, while the 24VDC value refers to the coil/control circuit used to operate the contactor.

Product Description

The Sensata Gigavac GX14CCB is a 350 A DC contactor for applications that require dependable switching from low-voltage DC circuits up to 800VDC. As part of the GX14 Series, it is built for long service life, compact installation, and operation in harsh environments. It is suitable for electric vehicles, hybrid vehicles, heavy-duty vehicles, battery systems, industrial DC equipment, marine power systems, power management cabinets, renewable energy equipment, and battery charging systems.

GX14CCB uses a normally open main contact. In the de-energized state, the main power circuit is open and the load is isolated. When the 24VDC coil is energized, the contactor closes and current flows through the M10 power terminals. When coil power is removed, the main contact opens again. This makes the GX14CCB suitable for use as a main contactor, battery disconnect, charge contactor, load isolation contactor, inverter input contactor, or DC bus switching device in a properly designed system.

The full model number is important for product listings and replacement orders. “GX14” identifies the 350 A, 800VDC contactor family. The first “C” indicates the 24VDC coil version with internal coil suppression. The second “C” indicates 48 inch flying leads. The final “B” indicates an SPST normally open auxiliary contact. The main contact and auxiliary contact are both normally open, but they have different functions: the main contact carries the power load, while the auxiliary contact is a low-current feedback contact.

Key Features

• 350 A current rating for high-current DC switching applications.
• Switching capability from 12VDC up to 800VDC.
• 24VDC coil for common vehicle, battery, and industrial control systems.
• SPST-NO main contact for controlled power connection and isolation.
• Normally open auxiliary contact mechanically linked to the main contacts.
• 48 inch flying leads for flexible wiring in cabinets and vehicle harnesses.
• Hermetically sealed EPIC construction for harsh operating environments.
• Built-in coil suppression for simplified control circuit design.
• Low contact resistance for efficient high-current operation.
• Can be mounted in any position and exceeds IP67 and IP69K sealing requirements.

Applications

The Sensata Gigavac GX14CCB is commonly used in electric and hybrid vehicles, heavy trucks, emergency vehicles, buses, marine DC systems, industrial automation, mining equipment, battery backup systems, power management systems, fuel cell equipment, battery chargers, solar power systems, wind power systems, and wave energy systems. Its 350 A rating makes it a practical choice where smaller 150 A or 225 A contactors are not enough, but a larger 600 A contactor is not required.

The normally open auxiliary contact can be used by a controller, battery management system, or diagnostic circuit to monitor contactor state. Because the auxiliary contact is mechanically linked to the main contacts, it provides useful feedback for sequencing, interlock logic, and status confirmation. The auxiliary contact is not designed for load switching and should only be used within its low-current signal rating.

Design Notes

The 800VDC and 24VDC ratings describe separate electrical paths. The 800VDC value applies to the main power contacts and describes the load-side DC circuit the contactor is designed to switch. The 24VDC value applies to the coil and describes the control voltage needed to actuate the contactor. A system can use a 24V controller output to operate the coil while the main terminals switch a much higher DC bus.

GX14CCB uses a dual-coil design. Both coils are used during pickup, and then the contactor transitions to lower continuous hold power. The coil should be driven according to the manufacturer’s requirements, and pickup voltage should be applied properly during testing rather than slowly ramped from zero. The contactor also includes internal coil suppression, so external suppression components should follow the manufacturer’s application guidance.

For systems with capacitive loads, such as inverter inputs or DC link capacitors, a pre-charge circuit is normally required before closing the main contactor. Pre-charge limits inrush current and helps protect the contactor contacts, fuses, busbars, cables, and connected electronics. Final design should also verify current direction, terminal torque, cable sizing, temperature rise, insulation spacing, enclosure protection, and fault current behavior.

Why Choose Sensata Gigavac GX14CCB

GX14CCB is a strong choice when a DC power system needs a sealed 350 A contactor with 24V control, long flying leads, and normally open auxiliary feedback. Compared with no-auxiliary versions, this model gives the control system a dedicated feedback contact. Compared with 15 inch lead versions, the 48 inch leads provide more wiring flexibility in larger equipment cabinets, battery enclosures, and vehicle platforms.

For backend product listings, write the full name as Sensata Gigavac GX14CCB. Avoid shortening it to GX14, because related GX14 models may use 12VDC or 48VDC coils, shorter leads, no auxiliary contact, or a normally closed auxiliary contact. GX14CCB specifically identifies the 24VDC coil, 48 inch lead, normally open auxiliary version.

FAQ

Is GX14CCB an 800V or 24V contactor?
It uses both values for different circuits. The main contacts switch DC loads up to 800VDC, while the coil/control circuit is 24VDC.

What is the current rating of GX14CCB?
GX14CCB is rated for 350 A continuous current.

Is GX14CCB normally open?
Yes. The main power contact is SPST-NO, and this version also includes a normally open auxiliary contact.

What does the final B mean in GX14CCB?
The final B indicates an SPST normally open auxiliary contact for feedback or control signaling.