Blue Sea 30A 2-Circuit Terminal Block
Blue Sea 30A 2-Circuit Terminal Block
Closed-Back Insulated Base with High-Rise Barriers for Isolated Wiring

DESCRIPTION
Reliable Electrical Distribution and Circuit Isolation for Marine and Automotive Systems
Managing multiple electrical feeds in confined spaces requires hardware that prioritises both safety and adaptability. The Blue Sea 30A 2-Circuit Terminal Block offers a professional-grade solution for organising wiring harnesses, extending cable runs, and creating clean, serviceable distribution points. Engineered for demanding environments, this dual-circuit block is ideal for marine vessels, caravans, 4WDs, and custom off-grid power installations where vibration resistance and electrical isolation are paramount.
Enhanced Safety with Closed-Back Insulation
A common risk in mobile and marine electrical work is accidental grounding or short-circuiting when mounting distribution components onto conductive metal bulkheads, aluminum hulls, or vehicle chassis. This terminal block resolves that issue through a fully closed-back moulded base. The solid backing completely insulates live electrical connections from the mounting surface, eliminating the need for separate insulating backing plates and reducing the risk of dangerous electrical faults.
Furthermore, the housing features high-rise moulded insulating barriers between each terminal pair. These physical dividers prevent wire strands or ring terminals from shifting and making accidental contact with adjacent circuits, ensuring long-term reliability even in high-vibration touring or offshore conditions.
Configurable Isolated or Common Circuits
Each screw pair on the block forms a completely independent, isolated 30A circuit, making it straightforward to connect incoming and outgoing leads for two separate devices or sensor lines. If your wiring architecture requires splitting a single power feed or grounding path across multiple outputs, the block is compatible with terminal jumpers. This allows you to seamlessly bridge the isolated pairs into a common bus configuration whenever your system layout demands it.
Key Features and Benefits
- Dual Isolated Circuits: Two independent screw-pair circuits allow for clean inline connections or separate positive and negative termination points on a single block.
- Closed-Back Moulded Design: Completely insulates live power from the mounting surface, allowing safe installation directly onto metal panels, chassis rails, or aluminium boat hulls.
- High-Rise Insulating Barriers: Deep physical walls between terminals prevent accidental shorting between adjacent circuits and keep ring or spade terminals securely aligned.
- Robust 30A Current Capacity: Supports continuous loads up to 30A per circuit, suitable for mid-draw accessories, lighting arrays, pumps, and control relays.
- Durable Terminal Hardware: Equipped with zinc-plated steel screws designed to provide high clamping force and reliable conductivity over time.
- Flexible Circuit Linking: Compatible with slip-on jumpers to easily convert the isolated screw pairs into a common distribution block.
- Integrated Mounting Holes: Pre-drilled end holes allow for straightforward, secure attachment to electrical panels, bulkheads, or enclosures.
Why Upgrade Over Standard Terminal Strips?
Lower-grade terminal strips often use brittle plastics that crack under tightening torque or lack adequate backing insulation, exposing your system to moisture tracking and ground faults. By choosing a dedicated Blue Sea Systems component, you invest in rugged housing materials and secure screw terminals that maintain tension against thermal cycling and road or wave shock. It simplifies fault-finding and maintenance by replacing messy inline splices or taped wire nuts with an accessible, testable connection point.
Ideal Applications
- Marine helm stations, bilge wiring, and navigation electronics
- Caravan, camper trailer, and motorhome 12V or 24V distribution boards
- 4WD canopy setups and auxiliary battery accessory management
- Industrial control cabinets and custom off-grid solar enclosures
Streamline Your Wiring Installation
Upgrade your electrical panel with a secure, serviceable connection point. Add the Blue Sea 30A 2-Circuit Terminal Block to your toolkit today for a safer, cleaner wiring layout in your boat, caravan, or off-road vehicle.
SKU: BS-2502B
SPECIFICATIONS
| Specification | Details |
|---|---|
| Product type | Terminal block |
| Maximum current | 30A |
| Circuits | 2 |
| Design | Closed back; insulates power from the mounting surface |
| Circuit arrangement | Each screw pair is one isolated circuit |
| Jumpers | Allow creation of common circuits |
| SKU: | BS-2502B |
| Model #: | BS-2502B |
| MPN: | BS-2502B |
| Package weight: | 0.06 kg |
| Package length: | 0.08 m |
| Package width: | 0.03 m |
| Package height: | 0.03 m |
WARRANTY
Blue Sea Warranty Policy
Blue Sea Systems products sold by us are supplied with a warranty against defects for the warranty period shown below, subject to the product type, application and the terms of this warranty policy.
The express warranty provided by us is limited to a maximum of 5 years from the original date of purchase, unless otherwise required under Australian Consumer Law.
Blue Sea Systems may offer longer manufacturer support on some products at their discretion
Warranty Lengths by Product Range
| Blue Sea Product Range | Warranty Length | Application / Notes |
|---|---|---|
| Most Blue Sea Systems Products | 5 years | Applies to most Blue Sea Systems products found to be defective in materials or manufacture. |
| P12 Battery Chargers | 5 years | Warranty period starts from the original date of purchase. |
| P12 Remote Displays | 5 years | Warranty period starts from the original date of purchase. |
| Digital Meters | 3 years | Warranty period starts from the original date of purchase. |
| Vessel System Monitors | 3 years | Warranty period starts from the original date of purchase. |
Warranty Assessment and Remedy
If a Blue Sea Systems product is found to be defective in materials or manufacture within the applicable warranty period, we will, at our discretion, arrange a repair, replacement, store credit or refund, depending on the nature of the fault and the requirements of Australian Consumer Law.
Products may need to be returned for assessment before a warranty claim can be approved. Where required, the product must be returned with dated proof of purchase and a clear description of the fault.
Labour costs for removing, replacing, reinstalling or diagnosing a product are not covered by this express warranty unless otherwise required under Australian Consumer Law.
Making a Warranty Claim
To make a warranty claim, please contact us with your dated proof of purchase, product details and a description of the fault.
The product may need to be returned for inspection before the claim can be assessed. If the product is confirmed to be faulty and covered by this warranty, we will advise the available remedy.
What This Warranty Does Not Cover
This warranty does not cover faults or damage caused by incorrect installation, incorrect application, misuse, abuse, neglect, unauthorised modification, accidental damage, normal wear and tear, environmental damage, or failure to use the product in accordance with the manufacturer's instructions.
- Incorrect installation or wiring
- Incorrect product selection or application
- Misuse, abuse or neglect
- Physical or accidental damage
- Water ingress or environmental damage outside the product's intended use
- Unauthorised modification or repair
- Normal wear and tear
- Labour costs for removal, replacement, reinstallation or diagnosis
- Freight, travel or call-out costs unless otherwise required by law
- Products not returned for assessment when reasonably required
Manufacturer Support
Blue Sea Systems may provide additional manufacturer support on some products beyond the warranty period listed above. Where available, we may assist customers in contacting the manufacturer, but any manufacturer support beyond the express warranty period is subject to the manufacturer's own terms and continued availability.
Australian Consumer Law
This warranty is in addition to other rights and remedies available at law. Our goods come with guarantees that cannot be excluded under the Australian Consumer Law. You are entitled to a replacement or refund for a major failure and compensation for any other reasonably foreseeable loss or damage. You are also entitled to have the goods repaired or replaced if the goods fail to be of acceptable quality and the failure does not amount to a major failure.

