Blue Sea Systems 30A Terminal Block, 600V AC/DC, Closed-Back, Independent Circuits

Overview

The Blue Sea Systems 2500 Series Terminal Block is a closed-back 30A terminal block range for organizing independent circuits in marine electrical systems. Each screw pair is isolated, so conductors can be kept separate unless jumpers are added to create common circuits.

This terminal block family is offered from 2 to 12 circuits and is rated for 30A continuous service with a maximum voltage rating of 600V AC/DC. The closed-back base helps insulate the live connections from the mounting surface, which is useful when the block is installed behind a distribution panel, inside a console, under a helm, or in another protected electrical area on board.

Key features

• Closed-back construction insulates the electrical path from the mounting surface.
• Each screw pair functions as one isolated circuit for clean separation of conductors.
• 30A continuous rating for branch-circuit termination work within the system limits.
• Maximum voltage rating of 600V AC/DC for broad marine electrical use within the stated rating.
• Nickel-plated brass bus material and stainless steel screws suit protected onboard electrical installations.
• UL 94 V0 PC base material supports safer use in enclosed electrical spaces.
• M4 terminal screws accept #8 M4 wire terminals, with 10 in-lb screw terminal torque.
• Optional 9217 jumpers can be used when adjacent independent circuits need to be made common.

Variants

This range varies by circuit count, with configurations for 2, 4, 6, 8, 10, and 12 independent circuits. The main selection point is how many separate termination pairs are needed in the panel, console, electronics area, or equipment compartment.

The 30A rating, closed-back style, independent screw-pair layout, M4 terminal screws, #10 M5 mounting screw size, nickel-plated brass bus material, stainless steel screw material, and 9217 jumper compatibility remain consistent across the listed circuit options. Longer versions provide more termination points while using the same terminal block format.

Installation and fit

Select the circuit count based on the number of conductors that need organized termination, leaving enough room for future service access and clear labeling. The block mounts with #10 M5 screws, so the mounting surface should be flat, secure, and located where the terminals stay protected from direct spray, standing water, and accidental contact.

Use the stated 10 in-lb terminal screw torque and properly sized #8 M4 terminals. As with any onboard electrical work, circuit protection, wire sizing, and conductor routing should match the load, the vessel layout, and the applicable marine electrical practices.

Use on board

This terminal block is a practical fit for refits, helm wiring cleanup, electronics installations, and distribution panel work where several small circuits need a secure termination point. Because each circuit is independent, it works well when the installer needs separation rather than a shared bus, with the option to add jumpers where a common connection is required.

Orders are processed within 2 business days, which includes verification, packing, and dispatch. Orders of $100 or more qualify for free shipping when eligible. For orders under $100, shipping costs are calculated at checkout based on destination, package weight, and selected service. International shipping is available for eligible products, and certain items may require additional handling, warehouse transfers, or may ship directly from the manufacturer, which can affect processing time.

Deliveries are handled by preferred carriers such as USPS, UPS, FedEx, DHL, and others depending on your location and selected service. Estimated delivery times are displayed at checkout and may vary due to customs processing, carrier delays, weather, postal disruptions, or other circumstances beyond our control. Once your order ships, you'll receive a confirmation email with tracking information. Tracking may take up to 24 hours to update on the carrier's website and is also available through your account when applicable.

We ship throughout the United States and to most international destinations for products eligible for international shipping. International orders may be subject to customs duties, taxes, brokerage charges, or other import fees, which are the customer's responsibility and are not included in the product or shipping price. PO Boxes are accepted only when shipping through USPS, and not all packages qualify for this option. If your order does not arrive within the estimated delivery window, please contact us at info@apollolighting.com or +1 (954) 375-0100 so we can assist with locating your package.

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Returns may be requested within 30 days of receiving your order. Items must be unused, uninstalled, unaltered, and returned in their original packaging with all tags, packing materials, blank warranty cards, manuals, instructions, accessories, and included items. Certain products, including installed or used electronics, electrical components, lighting, consumables, custom or special-order items, cut-to-length products, safety equipment, and merchandise exposed to water or marine conditions, may not be eligible for return.

To request a return, sign in to your account and select the applicable order and items, and submit your request for review. Eligible unfulfilled items may also be submitted for cancellation within 1 hour of placing the order. Returns or cancellations are not considered approved until you receive confirmation from Apollo Lighting. Please do not ship or drop off merchandise before receiving return approval and instructions.

Customers are responsible for arranging and paying for return shipping unless the return is due to an error by Apollo Lighting or the item is verified as defective, damaged, or incorrect. Missing, damaged, defective, or incorrect items must be reported within 2 business days of delivery, and photos or other documentation may be required for review. If the issue is verified, Apollo Lighting may provide or reimburse return shipping and issue a replacement or refund depending on the circumstances. International customers are responsible for return shipping, duties, taxes, customs charges, brokerage fees, and other costs associated with an international return.

After your return is received and inspected, approved refunds are issued to the original payment method and may take 5-7 business days to appear after processing. Original shipping and handling charges are nonrefundable, and the value of any included free items that are not returned may be deducted from the refund. Apollo Lighting does not charge a standard restocking fee on eligible returns. Returns that are incomplete, damaged, installed, used, altered, improperly packaged, or otherwise do not meet the eligibility requirements may be refused. We recommend using a trackable and appropriately insured shipping service for all customer-arranged returns.

For assistance, contact info@apollolighting.com or call +1 (954) 375-0100.

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Many products sold by Apollo Lighting include a manufacturer's warranty covering defects in materials or workmanship. Warranty terms vary by brand, product category, and model, so eligibility, coverage duration, exclusions, and available remedies are determined by the applicable manufacturer. We recommend reviewing the warranty information provided with your product before installation or use, especially for marine electronics, navigation equipment, lighting, electrical systems, pumps, safety equipment, and other specialized marine products.

If you need warranty service, the claim must follow the process established by the manufacturer, authorized service center, or designated warranty provider. You may be asked for proof of purchase, a serial number, product registration, photos, maintenance or installation records, or other documentation. Apollo Lighting does not determine or modify a manufacturer's warranty coverage or final claim decision, but we are happy to help provide purchase information and direct you to the appropriate manufacturer or warranty resource.

Keep your receipt, product documentation, serial number information, and original packaging when practical. Damage caused by normal wear, misuse, improper installation, insufficient maintenance, corrosion, impact, unauthorized modifications, electrical issues, or operation outside the manufacturer's specifications may not be covered. Warranty claims are separate from standard returns, so a product that has been installed, used, or exposed to marine conditions may no longer qualify for return while still remaining eligible for evaluation under the manufacturer's applicable warranty.

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