2 Pin 550A MSD Connector for EV Plug

SKU: NI4-1-S550W-2NYA Tags:

  • 200A, 250A, 315A, 350A, 400A, 450A, 550A.
  • Multiple current sizes are available.
  • Protects against excessive current in electric vehicle battery boxes.
  • Unique heat dissipation structure extends fuse life.
  • Simple to plug and unplug without special tools.
  • Excellent Electrical Insulation.
  • Secondary Buckle.
  • Way To Install: Front Install / Back Install.

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The MSD Connector is a specialized safety device with high-voltage interlock function designed for the high-voltage boxes or battery boxes of electric vehicles. Primarily used to protect against excessive current and allow quick disconnection of high-voltage circuits, it’s an essential tool for technicians working on or repairing electric vehicles.

Key features include a secondary protection structure for added safety, torsion spring jacks for increased durability, unique heat dissipation to extend fuse life, and easy operation without the need for special tools. Various fuses and installation options offer adaptability to different vehicle needs. Its wide application in new energy vehicles makes it a necessary and invaluable component for electric vehicle safety and maintenance.

1. Two-stage lever with HVIL time delay

Ensures safe and reliable power disconnection, minimizing the risk of electrical shock during maintenance or repair work.

2. Integrated internal HVIL

Provides additional protection and peace of mind, preventing accidental contacts and reducing the potential for electrical hazards.

3. Unique cooling structure

Our MSD Connector features an innovative cooling design that effectively dissipates heat, ensuring optimal performance and prolonging the lifespan of electrical components.

4. Dual-channel design with lower temperature rise

Optimized electrical pathways and enhanced heat dissipation result in significantly lower temperature rise, reducing the risk of overheating and ensuring reliable operation.

5. Easy and tool-free unmatting

No need for specialized tools or equipment to disconnect the MSD Connector, saving time and effort during service or maintenance tasks.

2 Pin 550A MSD Connector Manual Service Disconnect EV Plug Feature

Product Type
Connector Type: Plug
Number Of Positions : 2 Pin
Key: N
Contact Termination: Crimp
Mounting Type: Panel Mount
Shell Material: Nylon
Contact Material: Copper Alloy
Contact Finish: Silver Plating
Shielding: Shield
Application: Automotive Electronics
Mounting Feature: Silver Plating
Features: With Fuse
Rated Current: 200A, 250A, 315A, 350A, 400A, 450A, 550A
Rated Voltage: 800V
Electrical Protection: IP2XB
Operating Temperature : -40℃~125℃
Standards and Specifications
Ingress Protection: IP67
Flammability: UL94 V-0

MSD Connector Drawing

MSD Drawing

Weight 92 g
Connector Type


Number of Positions

2 Pin

Q: How does the unique cooling structure of the MSD Connector benefit me?

A: The MSD Connector is designed with a unique cooling structure that ensures lower temperature rise during operation. This prevents overheating and increases the overall efficiency and performance of the device.

Q: Can you explain the dual-channel design of the MSD Connector?

A: The MSD Connector incorporates a dual-channel design, which enhances its reliability and safety. This design allows for better signal transmission and reduces the risk of electrical interference.

Q: Is it easy to disconnect the MSD Connector?

A: Yes, disconnecting the MSD Connector is extremely easy as it does not require any tools. This makes it convenient and hassle-free to unmate the connector whenever needed.

Q: Can the receptacle of the MSD Connector be placed in different positions?

A: Absolutely! The receptacle of the MSD Connector can be mounted either in the front or rear position, providing you with versatility and enabling easy integration into your setup.