Durakool DEVR20-5091-S8-D012-R1 High-Voltage DC Contactor

The Durakool DEVR20-5091-S8-D012-R1 High-Voltage DC Contactor is a robust and highly reliable electrical switching device engineered for electric vehicles (EVs) and high-capacity energy storage systems. Designed to safely "make and break" extremely high DC loads, this hermetically sealed contactor is capable of handling up to 1000V DC and a continuous current of 200 Amps. Its bi-directional design and integrated coil economizer make it a highly efficient choice for main battery isolation.

Key Specifications:

• Category: Automotive Parts & Accessories / EV High Voltage Components / DC Contactors & Relays

• Product Type: High-Voltage Main DC Contactor (Gas-Filled)

• Manufacturer: Durakool

• Model / Part Number: DEVR20-5091-S8-D012-R1

• Maximum Rated Voltage: 1000V DC (1kV)

• Rated Continuous Current: 200A

• Coil (Control) Voltage: 12V DC

• Auxiliary Contact Rating: 2A at 30V DC

• Electrical Control Connection: Four flying leads (Red/Black for the 12V coil, Blue/Blue for the auxiliary circuit)

• Power Terminals: Top-mounted M8 male threaded studs

• Certifications: CE, UL Recognized (cURus)

• Origin: Made in China

Key Features:

• Gas-Filled Hermetic Seal – The internal switching contacts are sealed in an inert gas environment. This prevents contact oxidation, minimizes electrical resistance, and provides a stable environment to actively extinguish the massive electrical arcs generated when breaking a 1000V DC circuit.

• Magnetic Arc Blowout – Engineered with internal magnets specifically designed to rapidly stretch and blow out high-voltage DC arcs, preventing terminal welding and ensuring a long mechanical lifespan.

• Non-Polarized (Bi-Directional) – Unlike many high-voltage contactors, the main power terminals are non-polarized, meaning the unit can safely break current flowing in either direction (crucial for EVs that utilize regenerative braking).

• Integrated Coil Economizer – The internal dual-coil design automatically draws a higher inrush current to quickly pull the massive contacts closed, and then drops to a highly efficient 5W holding power, preventing the 12V coil from overheating during continuous operation.

• Auxiliary Feedback Circuit – The blue flying leads connect to an internal, mechanically linked auxiliary switch. This provides crucial physical feedback to the vehicle's Battery Management System (BMS), verifying exactly when the main high-voltage contacts have successfully opened or closed.

• Physical Arc Barrier – Features a molded plastic divider sitting directly between the two M8 studs to prevent high-voltage flashover across the top of the unit.

Ideal For:

• Main battery pack isolation (Main Positive / Main Negative) in Electric Vehicles (EVs) and Plug-in Hybrids (PHEVs)

• High-performance custom EV conversions

• Solar array (PV) inverters and high-capacity Battery Energy Storage Systems (BESS)

• DC Fast Charging stations and EVSE infrastructure

• Heavy-duty industrial DC motor controllers

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