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Description
Blue Sea 187-series 40 Amp Circuit Breaker Surface MountBlue Sea Systems 187 Series Circuit Breaker Surface Mount 40A Model: 7138 BSS Combines switching and circuit protection into a single device* Clear, single lever operation ""Trip Free"" design cannot be held ""ON"" during fault current condition Waterproof Recessed mounting holes for clean appearance Large Clearance around terminal studs accept heavy gauge wire lugs Robust 5 16 M8 terminals provide high torque connections Large lever with vertical
Blue Sea Systems 187-Series Circuit Breaker - Surface Mount 40A
Model: 7138-BSS- Combines switching and circuit protection into a single device*
- Clear, single lever operation
- ""Trip Free"" design cannot be held ""ON"" during fault current condition
- Waterproof
- Recessed mounting holes for clean appearance
- Large Clearance around terminal studs accept heavy gauge wire lugs
- Robust 5/16 M8 terminals provide high torque connections
- Large lever with vertical/horizontal orientation provides indication of trip status
- Ignition protected - Safe for installation aboard gasoline powered boats
- Meets SAE J1171 external ignition protection requirements
* Do not use as a switch where high inrush currents are expected.
Specifications| Amperage | 40A |
| Maximum Voltage | 48vDC |
| Mounting | Surface Mount |
| Circuit Breaker Type | Thermally responsive Bi-metal blade |
| Terminal Stud Torque | 75 in-lb (8.47 Nm) |
| Interrupt Capacity | 5000A @ 12V 3000A @ 24V 1500A @ 42V |
| Minimum Operating Temperature | -40° C |
| Maximum Operating Temperature | 85° C |
| Case Material | Thermoset Polyester |
| Circuit Breaker Class | Type III - switchable/manual reset - trip free |
| Mounting Hole | Accept #10 (M5) Screw |
| Terminal Stud Size | 5/16"" - 18 |
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.8 ★★★★★
Based on 20 reviews
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Product Reviews
★★★★★ 5
Works great for my desk
I like being able to plug things in above and below the desk. Plug in the things below that I want always plugged in and can easily remove the ones on top
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Reviewed in the United States on February 18, 2026
★★★★★ 5
Great product for the price and is easy to use
This works great. It was easy to install on my desk. Doesn't take up much space. Great for charging my cell phone.
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Reviewed in the United States on December 16, 2025
★★★★★ 5
Good product
Works very good for my gaming system. sturdy design.
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Reviewed in the United States on January 12, 2026
★★★★★ 4
Desk Hub
Good device! I was able to mount it between 2 desks that are head to head, and we’re able to share the plugs very well. Plenty of space to mount on my 2” thick desk.
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Reviewed in the United States on August 25, 2025
★★★★★ 5
Great value and capacity for the real estate ratio is perfect.
It certainly takes up less real estate on my desk with a very high port capacity. It's solid and I like the fact that it can attached to a thicker surface. It was very easy to install and the plugs give good options as there's always some cord that can't be plugged in. The USBs are a bonus as I already have ports on a different device. But, I'm sure I'll end up using these USB ports eventually. The value is really good for the capacity you get. Having the strip further in to use the back plugs easier makes a lot of sense. Could be an issue for some who don't have table real estate as it does push the strip in a bit.
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Reviewed in the United States on August 4, 2025