Blue Sea Single-Pole Single-Throw OFF-(ON) Toggle Switch
Blue Sea Single-Pole Single-Throw OFF-(ON) Toggle Switch
Non-Corrosive Momentary Control for 5/8" (16mm) A-Series Apertures

DESCRIPTION
Reliable Momentary Panel Switching for Marine and Automotive Applications
The Blue Sea Systems SPST OFF-(ON) Toggle Switch provides dependable, tactile momentary control for essential onboard systems. Engineered specifically for demanding marine, RV, and off-grid electrical environments, this single-pole, single-throw switch is designed to handle intermittent circuits with precision. Because the actuator springs back to the OFF position immediately upon release, it prevents accidental continuous engagement, protecting critical starter motors, pumps, and warning devices from premature wear or burnout.
Seamless Integration with A-Series Panel Apertures
Achieving a uniform, factory-grade aesthetic on custom switch panels and dashboards can often be challenging when mixing circuit breakers and standard switches. This unit solves that integration issue by comes supplied with a specialised black mounting adapter. It allows the toggle switch to mount directly into standard Blue Sea A-Series toggle circuit breaker apertures using a 5/8-inch (approx. 16mm) mounting hole. This ensures your momentary controls align cleanly alongside your primary circuit protection without requiring custom fabrication or mismatched panel cutouts.
Key Features and Benefits
- Momentary OFF-(ON) Action: Spring-return white toggle actuator ensures circuits are only energised while actively held, reducing the risk of drained batteries or overheated solenoids.
- Marine-Grade Durability: Manufactured from non-corrosive nickel-plated brass and robust phenolic materials to withstand high-moisture, salt-air, and high-vibration environments.
- A-Series Panel Compatibility: Includes a dedicated panel mount adapter and Phillips head mounting screws to fit standard 5/8-inch (approx. 16mm) circuit breaker cutouts.
- Fast Electrical Termination: Equipped with rear male quick-connect spade terminals for straightforward, secure wiring during installation or maintenance.
Built to Outlast Standard Hardware in Harsh Conditions
In marine and mobile installations, inferior switches often suffer from internal contact oxidation, seizing, or housing degradation due to salt spray and humidity. By utilising a non-corrosive phenolic body paired with nickel-plated brass hardware, this toggle switch resists environmental degradation. It maintains low contact resistance and smooth mechanical actuation over its service life, minimising voltage drop and reducing the risk of switch failure when you need to engage critical equipment.
Ideal Applications
This momentary toggle switch is highly versatile and suited to a wide range of low-voltage control circuits and heavy-duty relay triggers, including:
- Generator Starters: Safely crank auxiliary generators without the risk of leaving the starter motor engaged.
- Bilge Pump Overrides: Manually test or pulse bilge pumps to clear residual water from the hull.
- Signalling and Visibility: Operate marine horns, deck alert sirens, or intermittent windscreen wiper washers.
- Engine Controls: Actuate glow plugs, engine stop solenoids, or starter relays on marine vessels, trucks, and industrial machinery.
Upgrade Your Control Panel
Ensure clean panel integration and dependable momentary switching for your vessel or vehicle. Add the Blue Sea SPST OFF-(ON) Toggle Switch to your electrical setup today for professional-grade control you can rely on.
SKU: BS-8205B
SPECIFICATIONS
| Specification | Detail |
|---|---|
| Switch configuration | SPST (single-pole, single-throw) |
| Switching positions | OFF-(ON), two positions; momentary ON |
| Actuator | Toggle |
| Mounting | Panel mount in A-Series toggle circuit breaker apertures |
| Mounting adapter | Supplied for a standard 5/8" circuit breaker mounting hole |
| Construction | Nickel-plated brass and phenolic; non-corrosive |
| Applications | Generator starters, bilge pumps, horns, wipers and engine controls |
| SKU: | BS-8205B |
| Model #: | BS-8205B |
| MPN: | BS-8205B |
| Package weight: | 0.036 kg |
| Package length: | 0.08 m |
| Package width: | 0.04 m |
| Package height: | 0.04 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.

