What is the MX series, and which applications is it designed for?

The GIGAVAC MX series is a hermetically sealed DC contactor family engineered to meet MIL-R-6106 — designed for military vehicles and heavy-duty applications. The hermetic ceramic-insulated body operates up to 200 °C. It is preferred for heavy-duty industrial switching, military vehicle power management, off-road vehicles, forklift / AGV, ESS isolation, high-inrush applications and heavy industrial machinery. The 26+ model line offers 150 A to 1000 A continuous contact current and switches up to 48 Vdc.

What sets the MX series apart from competitors?

The MX series' key advantage is its contact construction. Built to withstand extreme currents, it shows no contact welding or sticking even under sudden, high-current conditions. This makes it one of the industry's most reliable DC contactor families against inrush-induced welding. It is the primary reason MX is chosen for ESS make-current, motor inrush, and heavy-duty industrial systems.

What is the MX current range, and which model carries which current?

Continuous contact current spans 150 A (MX11/MX21) up to 1000 A (MX110). Intermediate ratings: 200 A (MX22, MX32, MX52, MX62), 300 A (MX23), 400 A (MX14, MX24, MX34, MX54, MX64, MXL14, MXNC14, MXSA, MXSB, MXC), 500 A (MX15, MXSL15, MXST15) and 600 A (MX16, MX46, MX56, MX66, MXST16). Inrush capability reaches 6000 A.

What do silver contacts provide in the MX series?

Silver contacts in the MX series deliver long service life. Their low contact resistance keeps heating to a minimum, translating into longer life and reliable performance. Combined with the superior contact construction, the silver build prevents melting or welding even under sudden, high-current bursts — a critical advantage in heavy-duty industrial switching, motor control and high-frequency on/off applications.

What is the dual-coil design and what is it for?

The dual-coil design splits operation between two coils: • Pick-up coil — energises at full power on closing, generating the magnetic field that fully seats the contacts. • Hold coil — runs at low power once closed, retaining the contactor in position. This dramatically lowers annual energy use in always-on applications. Compared with single-coil contactors it draws far less power — a major benefit for EV main contactors, ESS isolation and continuous industrial duty.

How does MX comply with MIL-R-6106?

MIL-R-6106 is the U.S. DoD military standard for electromagnetic relays and contactors. It mandates reliable operation under extreme conditions — high temperature, vibration, shock, humidity, and military-vehicle environments. The MX series meets these requirements through hermetic ceramic insulation, silver contacts, dual-coil design and operation up to 200 °C — making it the preferred choice for military vehicles, defence systems, engine-bay control and aerospace.

Which heavy-duty smart variants exist in the MX series?

Beyond the standard NO models, MX includes a rich set of heavy-duty smart variants: • MXNC14 — Normally Closed contact • MXL14 — Latching: changes state on a momentary pulse and holds without coil power • MXSA — Current sensing with overcurrent protection • MXSB — Analog-output current-sensing contactor • MXSL15 — Automatic low-voltage protection • MXST15/MXST16 — Time-delay (delayed release) DC contactors • MXC — CAN-bus digital communication contactor

What do the MXST15 / MXST16 time-delay contactors do?

MXST15 (500 A) and MXST16 (600 A) are delayed-opening DC contactors. After coil energy is removed, they hold the circuit closed for a pre-set delay. This is critical in DC-load systems for ride-through during brief power dips, controlled shutdown sequences, controlled discharge of capacitive loads and bridging the changeover time in backup-power systems. Coil control: 12 Vdc or 24 Vdc.

How does the MXSA overcurrent-protection contactor work?

MXSA is a DC contactor with a built-in current sensor. It continuously measures main-contact current and emits an automatic trip signal once an adjustable threshold is exceeded — combining switching and protection in a single unit. This collapses the external-sensor-plus-protection-relay-plus-contactor stack into one device, saving space, wiring and commissioning time. The trip threshold is configurable for different applications. With 400 A continuous capacity it suits heavy-duty industrial feeders.

What does the MXSL15 low-voltage protection contactor do?

MXSL15 is an automatic low-voltage protection contactor for battery-powered systems. When battery voltage drops below a configured threshold it opens the circuit automatically — protecting the cells from over-discharge and extending battery life. It is preferred in forklift, AGV, off-road vehicles and ESS systems. Continuous current 500 A, rated 48 Vdc.

How does the MXC CAN-bus contactor communicate?

MXC is a digitally-communicating DC contactor with a CAN-bus interface. Beyond the standard NO/NC contact function it streams real-time data over CAN: contact state (open / closed / fault), instantaneous current, instantaneous voltage, and accepts open/close commands. It integrates directly with a BMS, eliminating the need for separate sensors and parallel wiring — preferred in EV power management, ESS control panels and modern industrial systems with digital supervision.

What is the key difference between MX and GX?

MX and GX share the same ceramic insulation technology but are optimised for different segments: • GX series: switching up to 800 Vdc, ideal for EV and ESS, operating from -55 °C to 85 °C. • MX series: up to 48 Vdc, but with a superior contact build delivering 6000 A inrush, MIL-R-6106 compliance, operation up to 200 °C, and best-in-class resistance to inrush-induced welding. MX is the choice for heavy-duty industrial and military duty; GX is the choice for high-voltage mobility. Where you need high current under 48 V, military certification, high temperature, or critical inrush resistance — MX leads.

How is an MX contactor mounted?

MX contactors are position-independent — they can be mounted in any orientation. Depending on the model there are four mount types: bottom mount (MX11/12/14/16/22/23/24/110), stand-up (MX32/62/64), side mount (MX34/52/54/56) and busbar mount (MX66/46). Stainless-steel mounting inserts ensure years of corrosion-free service in humid environments, vibrating military vehicles and heavy-duty industrial use.

Which standards does the MX series comply with?

MX complies with: • MIL-R-6106 (military certification — its key feature) • cRUus certified (UL Recognition for Canada and the USA) • RoHS compliant • CE Mark of Conformity • IP67 / IP69K protection (model dependent) Some contact ratings or coil versions may need additional certification — a Sensata application review is recommended based on the requirement.

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MX Series — Heavy-Duty DC ContactorsMIL-R-6106 Standard

Military and heavy-duty silver-contact, hermetically sealed DC contactor family

GIGAVAC MX Series sealed DC Contactors are designed to meet MIL-R-6106 and are especially suited for military vehicles and heavy-duty applications. The hermetically sealed chamber shields the coil, contacts, and electronics from all outside environmental factors. The ceramic-to-metal weld provides a vibration-resistant, robust structure. Silver-plated contacts deliver low contact resistance and long life under high inrush conditions.

Military ground vehiclesHeavy-duty machineryIndustrial battery disconnectForklift / AGV power linesTelecom backup power

SERIES CERTIFICATIONS08APPROVALS

MIL-R-6106/G
MIL-STD-810
MIL-STD-202
MIL-STD-883
RoHS
REACH
CE
EPIC®

Certifications vary by model — see the corresponding model datasheet for details.

01Continuous Current: 150-400 A
02Sealing: IP69K
03Voltage: 48 VDC
04Temperature: -40 to +85 °C

MX Series Heavy-duty Contactor Models

Sorted by current rating (150A → 1000A)

19 MODELS10,112 PRODUCTS

SHARED IN THIS GROUPVoltage:48 VdcContact Form:SPST-NORated Voltage (V):48

CONFIGURATOR	MODEL↑ current	Continuous Current	Mounting	Coil Options	PDF
	MX11	150 A	Bottom Mount	12/24/48/72/120 Vdc, 120/240 Vac	Datasheet (PDF) — MX11
CONFIGURATOR · MX11
	MX21	150 A	Stand-up Mounting	12/24/48/72/120 Vdc, 120/240 Vac	Datasheet (PDF) — MX21
CONFIGURATOR · MX21
	MX12	200 A	Bottom Mount	12/24/48/72/120 Vdc, 120/240 Vac	Datasheet (PDF) — MX12
CONFIGURATOR · MX12
	MX22	200 A	Stand-up Mounting	12/24/48/72/120 Vdc, 120/240 Vac	Datasheet (PDF) — MX22
CONFIGURATOR · MX22
	MX32	200 A	Side Mount	12/24/48/72/120 Vdc, 120/240 Vac	Datasheet (PDF) — MX32
CONFIGURATOR · MX32
	MX52	200 A	Side Mount	12/24/48/72/120 Vdc, 120/240 Vac	Datasheet (PDF) — MX52
CONFIGURATOR · MX52
	MX62	200 A	Chassis Mount	12/24/48/72/120 Vdc, 120/240 Vac	Datasheet (PDF) — MX62
CONFIGURATOR · MX62
	MX23	300 A	Stand-up Mounting	12/24/48 Vdc	Datasheet (PDF) — MX23
CONFIGURATOR · MX23
	MX14	400 A	Bottom Mount	12/24/48 Vdc	Datasheet (PDF) — MX14
CONFIGURATOR · MX14
	MX24	400 A	Stand-up Mounting	12/24/48 Vdc	Datasheet (PDF) — MX24
CONFIGURATOR · MX24
	MX34	400 A	Side Mount	12/24/48 Vdc	Datasheet (PDF) — MX34
CONFIGURATOR · MX34
	MX54	400 A	Side Mount	12/24/48 Vdc	Datasheet (PDF) — MX54
CONFIGURATOR · MX54 1Contact Configuration:NOSPST-NO (Normally Open)2Continuous Current:400400 A3Frame / Mounting Type:MX54MX54 — Side Mount Coil codes vary by frame. S/T are low-power versions available only on 150 A & 200 A frames. K/L (AC) are available on the 150/200 A family except MX22. All coils include Internal Coil Suppression. Auxiliary contact rating: 2A, 24VDC (Form A = SPST-NO and Form B = SPST-NC). GENERATED CODE 3/9 · 33% MX54············ MATCHED MODEL MX54
	MX64	400 A	Chassis Mount	12/24/48 Vdc	Datasheet (PDF) — MX64
CONFIGURATOR · MX64
	MX15	500 A	Bottom Mount	12/24/48 Vdc	Datasheet (PDF) — MX15
CONFIGURATOR · MX15
	MX16	600 A	Bottom Mount	12/24/48 Vdc	Datasheet (PDF) — MX16
CONFIGURATOR · MX16
	MX46	600 A	Bottom Mount	12/24/48 Vdc	Datasheet (PDF) — MX46
CONFIGURATOR · MX46
	MX56	600 A	Side Mount	12/24/48 Vdc	Datasheet (PDF) — MX56
CONFIGURATOR · MX56
	MX66	600 A	Busbar Mounting	12/24/48 Vdc	Datasheet (PDF) — MX66
CONFIGURATOR · MX66
	MX110	1000 A	Bottom Mount	12/24 Vdc	Datasheet (PDF) — MX110
CONFIGURATOR · MX110

Smart & specialty models

12 models · Latching Type DC Contactors · NC Main Contact DC Contactors · CANBUS Communication DC Contactors · Over Current & Current Sensing Smart DC Contactors

Latching Type DC Contactors

3 MODELS840 PRODUCTS

SHARED IN THIS GROUPVoltage:48 VdcMounting:Bottom MountRated Voltage (V):48

CONFIGURATOR	MODEL	Continuous Current	Contact Form	Coil Options	Feature	PDF
	MXL14	400 A	SPST-NO (Latching)	12/24 Vdc	Latching	Datasheet (PDF) — MXL14
CONFIGURATOR · MXL14
	MXL15	500 A	SPST-NO (Latching)	12/24 Vdc	Latching	Datasheet (PDF) — MXL15
CONFIGURATOR · MXL15
	MXSL15	400 A	SPST-NO (Sensing)	12/24 Vdc	Sensing + Latching	Datasheet (PDF) — MXSL15
CONFIGURATOR · MXSL15

NC Main Contact DC Contactors

1 MODELS128 PRODUCTS

CONFIGURATOR	MODEL	Continuous Current	Voltage	Contact Form	Mounting	Coil Options	Feature	Rated Voltage (V)	PDF
	MXNC14	400 A	48 Vdc	SPST-NC	Bottom Mount	12/24/48 Vdc	Normally Closed	48	Datasheet (PDF) — MXNC14
CONFIGURATOR · MXNC14

CANBUS Communication DC Contactors

2 MODELS432 PRODUCTS

SHARED IN THIS GROUPVoltage:48 VdcContact Form:SPST-NO (CAN-Bus)Mounting:Bottom MountRated Voltage (V):48

CONFIGURATOR	MODEL	Continuous Current	Coil Options	Feature	PDF
	MXC15	350 A	12/24 Vdc	CAN-Bus	Datasheet (PDF) — MXC15
CONFIGURATOR · MXC15
	MXC16	600 A	12/24 Vdc	CAN-Bus	Datasheet (PDF) — MXC16
CONFIGURATOR · MXC16

Over Current & Current Sensing Smart DC Contactors

5 MODELS816 PRODUCTS

SHARED IN THIS GROUPVoltage:48 VdcContact Form:SPST-NO (Sensing)Mounting:Bottom MountRated Voltage (V):48

CONFIGURATOR	MODEL	Continuous Current	Coil Options	Feature	PDF
	MXSA15	350 A	12/24 Vdc	Over Current Contactor	Datasheet (PDF) — MXSA15
CONFIGURATOR · MXSA15
	MXSA16	600 A	12/24 Vdc	Over Current Contactor	Datasheet (PDF) — MXSA16
CONFIGURATOR · MXSA16
	MXSB15	350 A	12/24 Vdc	Current Sensing Contactor	Datasheet (PDF) — MXSB15
CONFIGURATOR · MXSB15
	MXSB16	600 A	12/24 Vdc	Current Sensing Contactor	Datasheet (PDF) — MXSB16
CONFIGURATOR · MXSB16
	MXSL15	400 A	12/24 Vdc	Sensing + Latching	Datasheet (PDF) — MXSL15
CONFIGURATOR · MXSL15

Adjustable Time-Delay Circuit Opening DC Contactors

2 MODELS48 PRODUCTS

SHARED IN THIS GROUPVoltage:48 VdcContact Form:SPST-NO (Time Delay)Mounting:Bottom MountRated Voltage (V):48

CONFIGURATOR	MODEL	Continuous Current	Coil Options	Feature	PDF
	MXST15	350 A	12/24 Vdc	Time Delay	Datasheet (PDF) — MXST15
CONFIGURATOR · MXST15
	MXST16	600 A	12/24 Vdc	Time Delay	Datasheet (PDF) — MXST16
CONFIGURATOR · MXST16

Accessories

connectors, interposer plates and adapters (non-configurable)

5 MODELS

MODEL	PDF
0544	Datasheet (PDF) — 0544
0697	Datasheet (PDF) — 0697
0856	Datasheet (PDF) — 0856
0857	Datasheet (PDF) — 0857
1006	Datasheet (PDF) — 1006

TECHNICAL DIFFERENTIATORS

Why MX Series?

05 · CATEGORIES

Superior Contact Construction

Contact build engineered for extreme currents
No melting or welding even under sudden, high-current bursts.
Silver contacts deliver long service life
Consistent performance under high inrush, motor starts and heavy duty.

Dual-Coil Design

Separate pick-up and hold coils
Materially lower annual energy use in always-on applications.
Hermetic ceramic-insulated body + operation up to 200 °C
Full environmental isolation — ideal for engine-bay and high-temperature use.

Military-Grade Certification

Designed to meet MIL-R-6106
Officially qualified for military vehicles and heavy-duty environments.
cRUus and RoHS compliant
International compliance, easy export and certification.

Heavy-Duty Current Performance

150 A to 1000 A continuous contact current
Single supplier across all 12 V – 48 V heavy-duty systems.
Inrush capability up to 6000 A
Safe response to ESS make-current, motor inrush and heavy-inrush use.

Heavy-Duty Smart Variants

MXL (latching), MXSA (current sensing), MXSB (analog output), MXC (CAN-bus)
BMS, current protection and digital comms — all from one family.
MXST (time-delay), MXSL (low-voltage protection), MXNC (Normally Closed)
Dedicated models for every protection scenario.

DATASHEET · GUIDE · APPLICATION NOTE

MX Series — Technical Resources

26 · FILES

Datasheets

MX11 / MX21 DatasheetSOON
MX22 / MX32 / MX52 / MX62 DatasheetSOON
MX23 DatasheetSOON
MX14 / MX24 / MX34 / MX54 / MX64 DatasheetSOON
MX15 DatasheetSOON
MX16 / MX46 / MX56 / MX66 DatasheetSOON
MX110 DatasheetSOON
MXL14 Latching DatasheetSOON
MXNC14 Normally Closed DatasheetSOON
MXSA Current Sensing DatasheetSOON
MXSB Analog Output DatasheetSOON
MXSL15 Low-Voltage Protection DatasheetSOON
MXST15 / MXST16 Time-Delay DatasheetSOON
MXC CAN-bus DatasheetSOON

Selection Guides

GIGAVAC Selection Guide (2026)SOON
Sensata EL Contactor Portfolio Brochure (2025)SOON

Application Notes

FREQUENTLY ASKED QUESTIONS

About the MX series

14/14

+8 MORE QUESTIONSALL QUESTIONS

RELATED INSIGHTS · MXREF · IMB · PUB · 10 ENTRIES

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RELATED INSIGHTS

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10 ENTRIES

// end of index · 10 / 10

MX Series — Heavy-Duty DC ContactorsMIL-R-6106 Standard

Smart & specialty models

Why MX Series?

Superior Contact Construction

Dual-Coil Design

Military-Grade Certification

Heavy-Duty Current Performance

Heavy-Duty Smart Variants

MX Series — Technical Resources

Datasheets

Selection Guides

Application Notes

About the MX series

Go deeper

GIGAVAC Akıllı Kontaktör Serileri ve GigaFuse

GIGAVAC CANBus Haberleşme Protokollü DC Kontaktör (MXC/GXC)

DC Yükler için Bırakma Gecikmeli Kontaktörler — MXST15/MXST16

DC Aşırı Akım Koruma Kontaktörü — MXSA Serisi

Akım Algılayan Analog Çıkışlı DC Kontaktör — MXSB

DC Otomatik Düşük Gerilim Koruma — MXSL15

DC Kontaktörlerde Kontak Yapışması Durumu

Kontaktör Bobin Ekomizeri Nedir?

Ekonomizer Çalışma Prensibi

Kontaktör ve Yüksek Voltaj Rölesi Seçimi

MX Series — Heavy-Duty DC ContactorsMIL-R-6106 Standard

Why MX Series?

Superior Contact Construction

Dual-Coil Design

Military-Grade Certification

Heavy-Duty Current Performance

Heavy-Duty Smart Variants

MX Series — Technical Resources

Datasheets

Selection Guides

Application Notes

About the MX series

01What is the MX series, and which applications is it designed for?

02What sets the MX series apart from competitors?

03What is the MX current range, and which model carries which current?

04What do silver contacts provide in the MX series?

05What is the dual-coil design and what is it for?

06How does MX comply with MIL-R-6106?

Go deeper

GIGAVAC Akıllı Kontaktör Serileri ve GigaFuse

GIGAVAC CANBus Haberleşme Protokollü DC Kontaktör (MXC/GXC)

DC Yükler için Bırakma Gecikmeli Kontaktörler — MXST15/MXST16

DC Aşırı Akım Koruma Kontaktörü — MXSA Serisi

Akım Algılayan Analog Çıkışlı DC Kontaktör — MXSB

DC Otomatik Düşük Gerilim Koruma — MXSL15

DC Kontaktörlerde Kontak Yapışması Durumu

Kontaktör Bobin Ekomizeri Nedir?

Ekonomizer Çalışma Prensibi

Kontaktör ve Yüksek Voltaj Rölesi Seçimi