GIGAVAC 48V 300A Normally Open Contactor

Hermetically Sealed MX Series Contactor for Heavy-Duty 48V DC Systems

Military-Grade Switching Performance for Extreme Environments

Managing high-current 48V DC power requires components engineered to withstand extreme electrical and environmental stress. The GIGAVAC MX Series contactor provides a dependable, normally open switching solution for demanding industrial, military, and heavy-duty vehicle applications. Designed to meet rigorous MIL-R-6106 standards, this 300A contactor mitigates the risk of electrical failure in critical off-grid, marine, and mobile power architectures.

Advanced Hermetically Sealed Construction

Standard unsealed contactors are vulnerable to moisture ingress, dust, and corrosive gases, which accelerate contact degradation and lead to premature failure. This unit features a fully hermetically sealed chamber that isolates the internal coil, silver contacts, and control electronics from external environmental hazards. Utilizing an advanced ceramic-to-metal weld, the enclosure maintains its structural integrity and operational reliability in extreme ambient temperatures up to 200°C. This makes it exceptionally well-suited for cramped engine bays, harsh industrial plants, and exposed mobile installations.

Superior Contact Integrity and Low-Power Coil Design

High-inrush currents and system overloads frequently cause inferior relays to fuse shut, creating dangerous electrical hazards. The MX Series incorporates heavy-duty silver contacts specifically formulated to resist contact welding and provide an extended operational lifespan under heavy loads. Additionally, the internal dual-coil architecture enables efficient, low-power coil operation without relying on Pulse Width Modulation (PWM). By eliminating PWM switching noise, this contactor reduces electromagnetic interference (EMI), protecting sensitive diagnostic and communication equipment wired into the same 48V bus.

Key Features and Technical Benefits

• Hermetically Sealed Chamber: Completely shields internal switching mechanisms from moisture, dust, and oxidation for safe operation in harsh environments.
• Ceramic-to-Metal Weld: Withstands extreme thermal cycling and operational temperatures up to 200°C without compromising the seal.
• Weld-Resistant Silver Contacts: Engineered for durability and reliable circuit breaking during high-inrush and overload conditions.
• PWM-Free Dual-Coil Design: Minimises parasitic battery drain while eliminating electromagnetic interference in sensitive 48V electronics.
• MIL-R-6106 Compliance: Built to stringent military specifications for shock, vibration, and mechanical longevity.

Ideal Applications for High-Current DC Switching

Whether you are designing an electrical system for an armoured defense vehicle, a commercial marine vessel, or an industrial battery storage bank, the GIGAVAC MX Series delivers consistent performance. It serves effectively as a master battery disconnect, high-load circuit isolator, or emergency power switch where standard automotive relays cannot survive.

Upgrade Your High-Current Switching System

Integrate the GIGAVAC G-MX23FCB contactor into your 48V electrical architecture to ensure safe, low-maintenance, and interference-free power control in the most demanding conditions.