Sensata Gigavac MX52CD DC Contactor Overview

The Sensata Gigavac MX52CD is a sealed hermetic DC contactor from the MX52 Series, designed for rugged low-voltage DC switching applications that require 200A current capacity and 24VDC coil operation. It uses chassis mounting, M8 power studs, M4 screw coil terminals, and an SPST normally open contact arrangement. This model is suitable for military vehicles, off-road equipment, battery disconnect systems, industrial DC power control, marine power systems, material handling equipment, and rugged 12V to 48V DC applications. In this model, the main switching circuit and the coil control circuit are separate: the main contacts switch the load circuit, while the 24VDC coil operates the contactor.

Product Description

The Sensata Gigavac MX52CD DC contactor is built for rugged low-voltage, high-current DC switching applications. As part of the MX52 Series, this model provides a 200A continuous current rating with 1/0 cable conditions and is designed for 12V to 48V DC power systems. It is commonly used in military vehicles, off-road equipment, battery disconnect systems, material handling platforms, marine electrical systems, industrial DC cabinets, and heavy-duty power control assemblies.

The MX52CD 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 24VDC coil receives the correct control voltage. This allows a low-voltage control circuit to switch a high-current DC load path. The load-side switching circuit and the 24VDC coil circuit are separate electrical paths, even when both are used in low-voltage DC equipment.

A key advantage of the Sensata Gigavac MX52CD is its hermetically sealed EPIC design. The ceramic-to-metal braze and gas-filled hermetic chamber help protect internal components from moisture, dust, oxidation, and harsh environments. The series is designed to exceed IP69K sealing performance, making it suitable for rugged vehicles, outdoor equipment, industrial battery systems, and applications exposed to water spray, vibration, corrosion, and contamination.

The MX52 Series is designed for demanding duty cycles and high inrush conditions. The datasheet lists 200A continuous current with 1/0 cable, 1200A for 1 second, 750A for 10 seconds, and 250A for 90 seconds. It also lists 200A at 24VDC resistive load switching for 100,000 cycles. These specifications make the MX52CD suitable for rugged DC power systems where startup surge, short overload events, or harsh operating conditions may occur.

The MX52CD configuration uses M8 power studs and M4 screw coil terminals. The “C” coil code indicates a 24VDC coil, while the “D” code indicates M4 screw coil connection. Since there is no final auxiliary contact code after “D”, this configuration should be treated as no auxiliary contact. For applications requiring status feedback, an auxiliary-contact version such as an MX52CDB should be selected instead.

Key Features

• Genuine Sensata Gigavac MX52 Series DC contactor
• 200A continuous current rating with 1/0 cable conditions
• Designed for rugged 12V to 48V low-voltage DC systems
• 24VDC coil for control circuit operation
• SPST-NO contact form, also described as 1 Form A
• No auxiliary contact in the MX52CD configuration
• Hermetically sealed EPIC construction exceeding IP69K standard
• M8 power studs and M4 screw coil terminals
• Silver contacts for long life and weld-resistant operation
• Designed for military, off-road, marine, and heavy-duty DC applications

Applications

The MX52CD DC contactor is suitable for systems that need reliable connection and disconnection of high-current, low-voltage DC circuits. Typical applications include military vehicles, off-road machinery, electric utility vehicles, battery disconnect units, forklifts, marine battery systems, emergency power equipment, industrial control cabinets, and heavy-duty DC distribution systems.

In a battery system, the Sensata Gigavac MX52CD can be used as a main contactor, load disconnect contactor, charge path contactor, or safety isolation device depending on the circuit design. Its 200A current rating makes it suitable for medium-current rugged DC platforms, while the 12V to 48V system range makes it better matched to low-voltage DC applications rather than high-voltage EV traction platforms.

Why Choose Sensata Gigavac MX52CD

The Sensata Gigavac MX52CD is a strong option when the system requires 200A current capacity, 24VDC coil operation, sealed construction, side chassis mounting, M8 power studs, and M4 screw coil terminals. Compared with ordinary open contactors, the hermetic seal helps improve reliability in vibration, moisture, corrosion, and contamination-prone environments.

For replacement and maintenance projects, MX52CD should be selected when the original design requires MX52 Series performance with 200A contact rating, 24VDC coil voltage, SPST-NO contact form, M8 power studs, M4 screw coil connection, and no auxiliary contact. Before ordering, confirm coil voltage, load current, switching voltage, mounting space, terminal type, and auxiliary contact requirement.

FAQ

Q1: What is the full product name of MX52CD?
A1: The full product name is Sensata Gigavac MX52CD DC Contactor.

Q2: What is the current rating?
A2: The contact rating current is 200A.

Q3: What does 24VDC mean?
A3: 24VDC is the coil voltage used to operate the contactor, not the main load circuit rating.

Q4: Does MX52CD include an auxiliary contact?
A4: No. According to the MX52 ordering key, blank auxiliary code means no auxiliary contact.

Q5: What terminals does MX52CD use?
A5: It uses M8 power studs and M4 screw coil terminals.

Q6: Where is MX52CD commonly used?
A6: It is commonly used in military vehicles, heavy-duty equipment, battery disconnect systems, marine DC systems, and industrial low-voltage DC power control.