Sensata Gigavac GTM401BAB DC Contactor

The Sensata Gigavac GTM401BAB is a sealed hermetic DC contactor from the GTM400 Series, designed for high-voltage switching applications up to 1500VDC and 400A. It uses a 12VDC control coil, chassis mounting, stud and wire lead termination, 25 cm / 10 in flying leads, and a normally open auxiliary contact. This model is suitable for energy storage systems, high-power DC fast charging, heavy vehicles, industrial DC power distribution, battery packs, marine power control, and OEM battery disconnect modules. In this model, 1500VDC refers to the main contact switching voltage, while 12VDC refers to the coil voltage used to operate the contactor.

Product Description

The Sensata Gigavac GTM401BAB DC contactor is designed for reliable high-voltage DC switching in demanding battery and power conversion systems. As part of the GTM400 Series, this model combines a 400A contact current rating with 1500VDC switching capability, making it suitable for energy storage systems, high-power DC fast charging, heavy vehicles, battery packs, industrial power distribution, and high-voltage battery disconnect circuits.

The GTM401BAB uses an SPST-NO main contact arrangement, also described as 1 Form X. The main power 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 1500VDC 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 GTM401BAB is its fully bidirectional switching design. This is important in battery systems, ESS cabinets, and charging equipment where current may flow in both charge and discharge directions. The GTM400 platform is designed to provide reliable switching and circuit protection for high-voltage applications up to 1500V and 400A.

The GTM401BAB also includes a normally open auxiliary contact. The auxiliary contact can provide status feedback to a controller, battery management system, or safety circuit after the main contact changes state. Compared with GTM401BAX, which has no auxiliary contact, GTM401BAB is better suited for systems that need confirmation, diagnostics, or interlock logic.

This model uses 25 cm / 10 in flying leads and chassis mounting. The shorter lead length is useful for compact battery packs, charger modules, and DC control assemblies where the control wiring connection point is close to the contactor. The sealed construction helps protect the internal contact system from dust, moisture, oxidation, and harsh operating environments.

Key Features

• Genuine Sensata Gigavac GTM400 Series DC contactor
• 400A contact rating for high-voltage DC power control
• 1500VDC nominal switching voltage for HVDC systems
• 12VDC coil for control circuit operation
• Fully bidirectional switching for charge and discharge circuits
• SPST-NO main contact form for normally open switching
• SPST normally open auxiliary contact for feedback or interlock use
• Stud and 25 cm / 10 in wire lead termination
• 40 ms operate time and 12 ms release time
• Suitable for ESS, DC fast charging, heavy vehicles, and industrial DC systems

Applications

The GTM401BAB DC contactor is suitable for high-voltage systems that need dependable connection and disconnection of battery, load, inverter, or charging circuits. Typical applications include battery energy storage systems, high-power DC fast charging stations, heavy electric vehicles, battery packs, industrial DC power cabinets, UPS systems, marine electric propulsion, and renewable energy control equipment.

In a battery system, the Sensata Gigavac GTM401BAB can be used as a main positive contactor, main negative contactor, charge path contactor, load disconnect contactor, or safety isolation device depending on the system design. Its 400A current rating and 1500VDC switching voltage make it suitable for high-voltage platforms where bidirectional switching, sealed construction, auxiliary feedback, and stable switching performance are required.

Why Choose Sensata Gigavac GTM401BAB

The Sensata Gigavac GTM401BAB is a strong option when the system requires 400A current capacity, 1500VDC switching voltage, 12VDC coil operation, 10 in flying leads, chassis mounting, and a normally open auxiliary contact. Compared with lower-voltage contactors, this model is better matched to high-voltage ESS and fast charging systems. Compared with versions without auxiliary feedback, GTM401BAB gives the control system an additional status signal.

For replacement and maintenance projects, GTM401BAB should be selected when the original system requires GTM400 Series performance with 400A contact rating, 1500VDC nominal switching voltage, 12VDC coil voltage, 25 cm / 10 in flying leads, chassis mounting, and SPST normally open auxiliary contact. Before ordering, confirm coil voltage, auxiliary contact logic, lead length, mounting style, load current, and system voltage.

FAQ

Q1: What is the full product name of GTM401BAB?
A1: The full product name is Sensata Gigavac GTM401BAB DC Contactor.

Q2: What is the main switching voltage?
A2: The main switching voltage is 1500VDC nominal.

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 400A.

Q5: Does GTM401BAB include an auxiliary contact?
A5: Yes. GTM401BAB includes an SPST normally open auxiliary contact.

Q6: Where is GTM401BAB commonly used?
A6: It is commonly used in energy storage systems, DC fast charging, heavy vehicles, battery packs, industrial DC power cabinets, and high-voltage battery disconnect modules.