SKU: 31667644502

Perko Medium Duty Battery Selector Switch w/Key Lock

Sale price$109.32 Regular price$121.47
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Description

Perko Medium Duty Battery Selector Switch w/Key LockMedium Duty Battery Selector Switch w Key Lock Perko's 8501 Series battery selector switches are among the most popular battery switches ever produced. Their use of the traditional Perko bolt circle makes for easy installation, whether new or as a replacement. These switches can be mounted in numerous locations. And as ignition protected switches, they can be installed in the engine rooms of gasoline powered boats. In addition to doing everything a

Medium Duty Battery Selector Switch w/Key Lock

Perko's 8501 Series battery selector switches are among the most popular battery switches ever produced. Their use of the traditional Perko bolt circle makes for easy installation, whether new or as a replacement. These switches can be mounted in numerous locations. And as ignition protected switches, they can be installed in the engine rooms of gasoline powered boats.

In addition to doing everything a battery disconnect switch does, battery selector switches permit battery selection (of two or more batteries) for specific purposes including starting engines, running accessories or even recharging. They allow for the use of one or more batteries in systems with one or more engines and facilitate putting batteries in parallel for emergency starting when one or both batteries are substantially discharged.

Perko battery switches are designed for surface mounting. Standard duty switches have a bright red polycarbonate housing for safety with a large easy-to-turn black knob. The housing of the heavy duty switches are red fiber-reinforced polycarbonate. Selector switches are designed with a "make before break" feature. This allows switching between the "1", the "ALL" and the "2" positions while the engine is running. Models with an "Alternator Field Disconnect" feature offer protection for Non-Unitized Alternators should the switch accidentally be turned to the "OFF" position with the engine running.

Versions of the 8501 Series switches offer additional features such as alternator disconnect and key lock security.

The 90° rotation feature allows users to feel the switches' position in no light situations and the classic shape of the knob makes it easy to turn.

High conductivity studs are long enough to handle more than 1 cable and strong enough for torque needed for secure connections. Optional spacer ring (PN 0462DP0RED) allows for the use of larger cables.

Specifications:

  • Diameter: 5-1/4"
  • Depth: 2-5/8"
  • For use with 6 to 32 Volt Marine Electrical Systems
  • Capacity - 250 AMPS Continuous, 360 AMPS Intermittent
  • When used with Non-Unitized Alternators, these models will interrupt the field current (reducing the possibility of damage) if turned "OFF" with the engine running
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
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  • 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
SKU: 31667644502

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4.4 ★★★★★
Based on 29 reviews
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Verified Purchase
Maximus Armenti
Port Orchard, US
★★★★★ 5
Great in every facet
Color: Space grey
This thing works well. No complaints at all. haven't had any problems with heat, and it fits into your pocket but doesn't fill it up. This is a great value, especially if it's on sale and you need extra ports or an sd card reader or both I would encourage people to try it out!
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Reviewed in the United States on May 12, 2026
K
Verified Purchase
Kathy Thayer
Birmingham, US
★★★★★ 5
This hub worked when others did not
Color: Pink, Color: Pink
I have an Asus Zenbook that's at least 7 years old (ancient by technology standards) and it has a very problematic USB hub. I love my laptop. It functions well except for the hub. I usually get OEM peripherals for my electronics. (I use PC and Android. I'm not a Mac/Apple user.) In the case of the USB hub for my Zenbook the Asus replacement hub is garbage with a 1 star review on Asus website with warnings not to buy because of how fast it stops working. The Asus hub I purchased 3 months ago stopped working after using it 3 or 4 times. That's unacceptable in my opinion. I have tried other brands including Belkin, Anker and 2 others that I do not remember. None of them would deliver power to my laptop despite claiming they would. So I decided to try this hub. I need an external hub for the multiple USB ports because the Asus has no ports on the Zenbook itself, and power delivery (in a perfect world when everything works properly) should also be able to go thru the hub to charge the laptop. On my laptop, there's only one USB-C port to connect either direct power supply or a hub. You can't have both connected at the same time unless the hub allows power transfer to laptop, which the other brand hubs that I tried wouldn't support that power transfer, much to my frustration. This hub is the first hub that I've tried that will actually power my laptop. (I also switched my power supply cable to a Thunderbolt, so the combination of the new cable with this hub works.) I use a wireless mouse with a dongle that needs to be plugged in. I have a digital voice recorder that plugs in directly via USB-A to transfer files to the laptop. I use SD cards in my camera and MP3 player that I need a hub to transfer that media onto the laptop. This hub will allow all of that. Every port works that I have tried on this Acer hub and this hub does the thing that the other hubs failed to do on my laptop. The power transfer was the big issue for me and this Acer hub solved the problem that several others including the OEM, Asus, failed to do. Because of how many months I have been dealing with the power supply problem, hubs not delivering what they promised and this being the only hub that did work, I rate this product at 5 stars. It's less expensive than the Asus hub that stops working immediately after purchasing. It has more ports than the Asus hub with the extra SD card reader that the Asus hub doesn't have. It's a heavier duty outer shell compared to the Asus. The cord is thicker and better protected compared to the Asus, so it reduces the chance for stressing or bending the cord in a way that could break the wires inside or break the connector away from the wires. It's just a better design overall, when compared to the Asus hub. I am extremely satisfied with this Acer hub and I would recommend it since it did the "impossible" task that no other brand could do for me. 5 stars, indeed.
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Reviewed in the United States on April 8, 2024
A
Verified Purchase
Ash
West Palm Beach, US
★★★★★ 5
Actually amazing hub, it just works!
Color: Space grey
This dock is carrying my handheld system so hard right now, and for such a good price. I have literally every port filled including using the HDMI and it hasn't failed on me at all.
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Reviewed in the United States on April 26, 2026
E
Verified Purchase
Elaine Enoch
San Leandro, US
★★★★★ 5
Functional and portable
Color: Space grey
Very useful to organize multi connections needed for home office work set up. Small and portable.
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Reviewed in the United States on June 8, 2026
A
Verified Purchase
A Humble Opinion
Omaha, US
★★★★★ 4
Good little device
Color: Space grey
Nice little device. Works well with external drives and HDMI connections to a MacBook Air. Doesn't work great with a mouse USB 2 donegal - sporadic. Does work with USB 2 keyboard and a monitor HDMI for creating a "docking station" for my MacBook, but difficult with no mouse option. Good quality. Fairly compact. Nice color! Decent value for money for a known brand.
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Reviewed in the United States on May 3, 2026

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