Blue Sea Systems e-Series 48V On/Off Battery Switch

The Blue Sea Systems e-Series 48V On/Off Battery Switch (9003E) is a compact, high-amperage battery switch designed for isolating batteries in 12V to 48V electrical systems, ideal for marine, RV, and off-grid applications with make-before-break contact design for safe operation.

Product Description

The Blue Sea Systems 9003e e-Series Battery Switch is ignition protected and suitable for gasoline-powered boats, featuring a removable knob for security and low-profile mounting. It supports up to 275A continuous rating at 48V DC and 1200A cranking, with a crank rating of 1500A for 10 seconds. The switch uses tin-plated copper terminals for corrosion resistance and optimal conductivity, ensuring reliable battery management and isolation.

Key Features

• Make-before-break contact: Prevents momentary interruption when switching batteries.
• Removable knob: Locks in OFF position for security.
• Ignition protected: Safe for gasoline-powered boats (SAE J1171).
• Tin-plated copper terminals: Corrosion-resistant for marine environments.
• Low-profile mounting: Fits tight spaces with rear panel access.
• High amperage rating: Handles heavy loads reliably.
• IP66 rated: Waterproof for exposed locations.

Technical Specifications

• Model: 9003e – e-Series On-Off Battery Switch.
• Voltage rating: 48V DC max.
• Continuous rating: 275A DC.
• Intermittent rating: 450A DC (5 min).
• Cranking rating: 1200A DC (30 sec), 1500A DC (10 sec).
• Terminal studs: 3/8" - 16 (M10).
• Protection rating: IP66.
• Certifications: ABYC E-11, CE, ISO 8846, UL 1500, SAE J1171.

Dimensions & Weights

• Width: 72 mm.
• Depth: 72 mm.
• Height: 79 mm.
• Weight: 0.29 kg.

System & Application Notes

• Ideal for marine, RV, and off-grid systems to isolate batteries during maintenance or storage.
• Compatible with 12V to 48V DC systems; use for single battery bank on/off control.
• Suitable for exposed locations with IP66 waterproof rating.
• Installation: Mount with #10 screws; connect with appropriate cable lugs.
• Enhances safety with ignition protection and removable knob.
• Warranty: Limited lifetime.