Blue Sea Systems 2504 4-Circuit Terminal Block, 30 Amp 600V, M4 (#8) Stud

The Blue Sea Systems 2504 is a 4-circuit terminal block built for organizing and isolating power connections aboard a boat. Each of the four screw pairs forms its own independent circuit, so multiple accessories or feeds can share a single mounting location without interacting electrically. The block carries a 30 Amp, 600 Volt AC/DC rating per circuit and uses M4 (#8) terminal studs, making it suitable for a range of onboard DC and AC wiring tasks where reliable, code-compliant termination is needed.

A closed-back design fully insulates the live power connections from the mounting surface, reducing the risk of accidental grounding or short circuits when the block is surface-mounted to a panel or bulkhead. If a project calls for tying circuits together into a common bus, Blue Sea Systems jumpers 5035 and 5037 (sold separately) snap across the terminal pairs to combine independent circuits as needed. The 2504 measures 3.25 inches (82.60 mm) overall with a 2.81 inch (71.40 mm) mounting hole spacing, and weighs 0.17 pounds.

Specifications

• Brand: Blue Sea Systems
• Manufacturer Part Number: 2504
• Number of Circuits: 4
• Current Rating: 30 Amps per circuit
• Voltage Rating: 600 Volts AC/DC
• Terminal Stud Size: M4 (#8)
• Length: 3.25 inches (82.60 mm)
• Mounting Hole Spacing: 2.81 inches (71.40 mm)
• Weight: 0.17 pounds
• Material: Plastic
• Mounting Type: Surface mount, closed-back design
• UPC: 632085025045

Frequently Asked Questions

How many circuits does the Blue Sea Systems 2504 terminal block have? The Blue Sea Systems 2504 has 4 independent circuits, with each screw pair forming its own isolated circuit.

What is the current rating of the 2504 terminal block? Each circuit on the Blue Sea Systems 2504 is rated for 30 Amps.

What voltage is the 2504 terminal block rated for? 600 Volts AC/DC is the rating for each circuit on the 2504 terminal block.

What size terminal studs does the 2504 use? M4 (#8) terminal studs are used on the Blue Sea Systems 2504.

Can circuits on the 2504 be connected together? Yes, Blue Sea Systems jumpers 5035 and 5037 (sold separately) can be added across terminal pairs on the 2504 to combine independent circuits into a common bus.

Why does the 2504 have a closed-back design? The closed-back design on the 2504 fully insulates the live power terminals from the mounting surface, preventing accidental grounding or shorts against a metal panel or bulkhead.

What are the dimensions of the Blue Sea Systems 2504? The 2504 measures 3.25 inches (82.60 mm) in overall length with a mounting hole spacing of 2.81 inches (71.40 mm).

How much does the 2504 terminal block weigh? The Blue Sea Systems 2504 weighs 0.17 pounds.

What material is the 2504 terminal block made from? The 2504 is made from plastic.

Is each screw pair on the 2504 electrically isolated? Yes, on the Blue Sea Systems 2504 each screw pair is one isolated circuit, keeping the 4 circuits electrically separate unless jumpered together.

Can the 2504 be used for both AC and DC wiring? Yes, the 2504 is rated for 30 Amps at 600 Volts AC/DC, so it can be used on both AC and DC circuits.

Is the 2504 designed for surface mounting? Yes, the Blue Sea Systems 2504 is a surface-mount terminal block with a closed-back design that insulates it from the mounting surface.