Sensata Gigavac GTM501CAB DC Contactor

The Sensata Gigavac GTM501CAB is a sealed hermetic DC contactor from the GTM500 Series, designed for high-voltage switching applications up to 1500VDC and 500A. It uses a 24VDC control coil, bottom 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 24VDC refers to the coil voltage used to operate the contactor.

Product Description

The Sensata Gigavac GTM501CAB DC contactor is designed for reliable high-voltage DC switching in demanding battery and power conversion systems. As part of the GTM500 Series, this model combines a 500A 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 GTM501CAB 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 24VDC 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 24VDC value belongs only to the coil control circuit.

A key advantage of the Sensata Gigavac GTM501CAB 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 GTM500 platform is designed to provide reliable switching and circuit protection for high-voltage applications up to 1500V and 500A.

The GTM501CAB 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 GTM501CAX, which has no auxiliary contact, GTM501CAB is better suited for systems that need confirmation, diagnostics, or interlock logic.

This model uses 25 cm / 10 in flying leads and bottom 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 GTM500 Series DC contactor
• 500A contact rating for high-voltage DC power control
• 1500VDC nominal switching voltage for HVDC systems
• 24VDC 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 GTM501CAB 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 GTM501CAB 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 500A 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 GTM501CAB

The Sensata Gigavac GTM501CAB is a strong option when the system requires 500A current capacity, 1500VDC switching voltage, 24VDC coil operation, 10 in flying leads, bottom 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, GTM501CAB gives the control system an additional status signal.

For replacement and maintenance projects, GTM501CAB should be selected when the original system requires GTM500 Series performance with 500A contact rating, 1500VDC nominal switching voltage, 24VDC coil voltage, 25 cm / 10 in flying leads, bottom 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 GTM501CAB?
A1: The full product name is Sensata Gigavac GTM501CAB DC Contactor.

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

Q3: What does 24VDC mean?
A3: 24VDC 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 500A.

Q5: Does GTM501CAB include an auxiliary contact?
A5: Yes. GTM501CAB includes an SPST normally open auxiliary contact.

Q6: What is the difference between GTM501CAB and GTM501CAX?
A6: GTM501CAB has a normally open auxiliary contact, while GTM501CAX has no auxiliary contact.