Sensata Gigavac SGX251BXX DC Contactor

The Sensata Gigavac SGX251BXX is a sealed DC contactor from the SGX25 Series, designed for industrial high-voltage DC switching applications that require 250A current capacity and up to 1000VDC maximum switching voltage. It uses a 12VDC control coil, chassis mounting, screw terminal power connection, wire leads with connector, and no auxiliary contact. This model is suitable for residential energy storage systems, DC fast charging stations, electric forklifts, automated guided vehicles, industrial DC power distribution, battery packs, and OEM battery disconnect modules. In this model, 1000VDC refers to the main contact switching voltage, while 12VDC refers to the coil voltage used to operate the contactor.

Product Description

The Sensata Gigavac SGX251BXX DC contactor is designed for reliable DC power switching in industrial and clean energy systems. As part of the SGX25 Series, this model provides a 250A contact current rating and up to 1000VDC maximum switching voltage. It is commonly selected for energy storage systems, DC fast charging equipment, electric forklifts, AGV platforms, industrial power cabinets, battery packs, and high-voltage DC disconnect circuits.

The SGX251BXX uses an SPST-NO contact arrangement, also described as 1 Form A. The main contact remains open when the coil is not energized and closes when the 12VDC coil receives the correct control voltage. This allows a low-voltage control circuit to manage a high-voltage DC load path. The 1000VDC value belongs to the main switching circuit, while the 12VDC value belongs only to the coil control circuit.

A key advantage of the Sensata Gigavac SGX251BXX is its sealed hermetic construction. The sealed design helps protect the internal contact system from dust, moisture, oxidation, and contamination. This makes the SGX251BXX suitable for battery systems, outdoor energy equipment, industrial control cabinets, and mobile platforms where harsh environments can reduce the service life of ordinary open-frame contactors.

The SGX Series is positioned for a strong performance-to-cost ratio in industrial applications. The SGX250 platform is suitable for residential energy storage systems, DC fast charging stations, electric forklifts, and AGV equipment. This makes the SGX251BXX a practical choice for manufacturers that need reliable HVDC switching performance with a compact upright mounting style and simplified connector-based coil wiring.

The “X” auxiliary code indicates no auxiliary contact. This version is best suited for systems where separate contact feedback is not required or where contactor status is monitored through another circuit. For applications requiring feedback or interlock logic, an auxiliary-contact SGX25 version should be selected instead.

Key Features

• Genuine Sensata Gigavac SGX25 Series DC contactor
• 250A contact rating for industrial DC power control
• 1000VDC maximum switching voltage for high-voltage systems
• 12VDC coil for control circuit operation
• SPST-NO contact form, also described as 1 Form A
• No auxiliary contact for simplified circuit designs
• Hermetically sealed construction for harsh environments
• Screw terminal and wire lead connector termination
• Upright chassis mounting for industrial assemblies
• Suitable for ESS, DC fast charging, forklift, AGV, and industrial DC systems

Applications

The SGX251BXX DC contactor is suitable for systems that need reliable connection and disconnection of high-voltage DC battery, load, or charging circuits. Typical applications include residential energy storage systems, DC fast charging stations, electric forklifts, AGV platforms, battery packs, industrial DC power cabinets, UPS equipment, and renewable energy control systems.

In a battery system, the Sensata Gigavac SGX251BXX can be used as a main contactor, charge contactor, load disconnect contactor, or safety isolation device depending on the electrical design. Its 250A current rating and 1000VDC maximum switching voltage make it suitable for medium-current high-voltage platforms where sealed construction and cost-effective performance are required.

Why Choose Sensata Gigavac SGX251BXX

The Sensata Gigavac SGX251BXX is a strong option when the system requires 250A current capacity, up to 1000VDC switching voltage, 12VDC coil operation, sealed construction, upright chassis mounting, and no auxiliary contact. Compared with versions that include auxiliary feedback, this model is simpler for systems where the controller does not need a separate auxiliary signal.

For replacement and maintenance projects, SGX251BXX should be selected when the original design requires SGX25 Series performance with 250A contact rating, 1000VDC maximum switching voltage, 12VDC coil voltage, screw terminal and wire lead connector termination, upright mounting, 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 SGX251BXX?
A1: The full product name is Sensata Gigavac SGX251BXX DC Contactor.

Q2: What is the main switching voltage?
A2: DigiKey lists the switching voltage as up to 1000VDC maximum. Sensata’s SGX overview also describes SGX251BXX as a 750VDC, 250A, 12V coil version, so confirm the target system rating before replacement.

Q3: What does 12VDC mean?
A3: 12VDC 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 250A.

Q5: Does SGX251BXX include an auxiliary contact?
A5: No. The “XX” suffix indicates no auxiliary contact.

Q6: Where is SGX251BXX commonly used?
A6: It is commonly used in energy storage systems, DC fast charging stations, electric forklifts, AGV platforms, battery packs, and industrial DC control modules.