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EV Manual Service Disconnect
EV Manual Service Disconnect

MSD-H High Voltage Manual Service Disconnect (630A, 1000V)

With the rapid development of NEVs, MSDs have become widely used in high-voltage electrical systems. MSD connectors are mainly applied in electric vehicle maintenance disconnect switches, high-voltage circuit short-circuit protection systems, power distribution systems, PDUs, and other high-voltage applications.
In general, the primary function of an MSD is to ensure the safety of technicians during maintenance operations in high-voltage environments and to provide protection in emergency situations. It enables the rapid disconnection of high-voltage circuits, allowing maintenance, inspection, and servicing work to be carried out more safely and efficiently.
Operating Temperature:
-40℃ to +85℃
Rated Current (With Fuse):
160A-630A
Rated Voltage (With Fuse):
1000VDC
IP Protection:
IP67 (mated)
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Reliable Protection Solution for High-Voltage Electric Vehicle Systems
The MSD-H Manual Service Disconnect is specially engineered for high-voltage electric vehicle power systems, providing both reliable maintenance isolation and effective short-circuit protection. Designed for demanding EV applications, the MSD-H ensures enhanced operational safety, system reliability, and long-term performance in high-current environments.
With its optimized thermal management structure, redundant signal control design, and flexible installation methods, the MSD-H is an ideal solution for battery systems, power distribution units, energy storage systems, and other high-voltage applications.
630A 1000V Battery Pack Disconnect
Key Features of MSD-H Series EV Battery Maintenance Switch
◆ Dual Function Protection
The MSD-H serves as both a maintenance disconnect switch and a short-circuit protection device, ensuring safe servicing operations for electric vehicle power systems.

◆ Flexible Current Configuration
The switch current rating can be easily configured by selecting different fuse specifications, supporting various application requirements with a maximum fuse rating up to 630A.

◆ Highly Reliable Signal Design
Built-in signal control pins feature a redundant design, significantly improving connection reliability and operational safety.

◆ Optimized Thermal Management
The advanced thermal management structure effectively reduces heat accumulation and helps extend fuse service life under high-current operating conditions.

◆ Dual-Channel Current Path Design
The dual-channel structure minimizes temperature rise and improves current-carrying capability for enhanced system stability.

◆ Multiple Fuse Options
A wide range of fuse ratings (160A, 200A, 250A, 315A, 350A, 400A, 450A, 500A, 550A, 630A) are available to meet different power distribution and protection requirements.

◆ Flexible Installation Methods
Supports both front mounting and rear mounting, offering greater flexibility for system integration and vehicle layout optimization.
Safe. Reliable. Efficient.
The MSD-H delivers a dependable high-voltage safety solution for next-generation electric mobility and energy systems, combining robust protection performance with flexible integration capability.
Technical Specifications
Category Options / Specs
Installation Front Mount / Rear Mount
Rated Voltage 1000VDC (With Fuse); 1500VDC (Without Fuse);
Rated Current (With Fuse)  Up to 630A;
160A / 200A / 250A / 315A / 350A / 400A / 450A / 500A / 550A / 630A
Supported Fuse Brands Bussmann / YouRong
Connection Type Without Fuse: Busbar Interface, direct copper busbar connection
IP Protection IP67 in mated conditions
Operating Temperature -40℃ to +85℃
Mating Cycles > 500 Times
Application High-voltage circuit repair switch, manual circuit breaker, emergency disconnect
Target Markets Electric Vehicles / Battery Packs / Electric Drive / Energy Storage Systems (ESS) / PDU

 
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