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Description
Blue Sea Ml-acr Automatic Charging Relay With Manual Control 12vdc 500aBlue Sea Systems ML ACR Automatic Charging Relay with Manual Control 12V DC 500A Model: 7622 BSS Automatically manages the charging of two large battery banks Allows paralleling of battery banks for emergency starting 500 Ampere continuous rating to support high output alternators Magnetic Latch (ML)ACR draws very low current (<40mA to monitor terminal voltage) in the ""ON"" or ""OFF"" states, and draws moderate current for very short time when
Blue Sea Systems ML-ACR Automatic Charging Relay with Manual Control - 12V DC 500A
Model: 7622-BSS- Automatically manages the charging of two large battery banks
- Allows paralleling of battery banks for emergency starting
- 500 Ampere continuous rating to support high-output alternators
- Magnetic Latch (ML)—ACR draws very low current (<40mA to monitor terminal voltage) in the ""ON"" or ""OFF"" states, and draws moderate current for very short time when changing state
- Dual sensing—senses charge on both battery banks
- Start Isolation (SI)—can be configured for temporary isolation of House loads from Engine circuit during engine cranking to protect sensitive electronics
- Engine Isolation (EI)—can be configured for isolation of two engines while both are running to protect engine electronics and maximize alternator output
- Senses charging on two battery banks
- Manual control switch provides an added level of safety allowing control with or without power, and offering LOCK OFF capability for servicing
500 Amp magnetic latching (bi-stable) relay automatically combines batteries during charging and isolates batteries when discharging and when starting engine
Specifications| Control Circuit Connection | Tinned Wire |
| Nominal Voltage | 12V DC |
| Manual Control | Yes |
| Engine Isolation | Yes |
| Mounting | #10 |
| Start Assist | Yes |
| Start Isolation | Yes |
| Amperage Operating Current | 13mA |
| Amperage Operating Current when changing state | <7.0A |
| Terminal Stud Torque | 140 in-lb (15.82 Nm) |
| Continuous Rating | 500A |
| Intermittent Rating | 700A (5 min) |
| Cranking Rating 30 sec | 1450A DC |
| Minimum Operating Temperature | -10° C |
| Maximum Operating Temperature | 60° C |
| Cable Size to Meet Ratings | 4/0 AWG x 2 |
| Live Current Switching | 300A @ 12V DC |
| Stud Material | Tinned Copper |
| Switching Cycles | 100000 |
| Terminal Ring Diameter Clearance | Terminal Ring Diameter Clearance |
| Terminal Stud Length | 1.50in (38.1 mm) |
| Terminal Stud Size | 3/8"" - 16 (M10) |
| Wire Size | 20 AWG |
What's in the Box:
- ML-ACR Automatic Charging Relay with manual Control 12v
- SPDT Remote Control Contura Switch - ON-OFF-ON
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
4.2 ★★★★★
Based on 22 reviews
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Product Reviews
★★★★★ 5
Great Value For The Money
Color: White
I needed something to present my daughter's upcoming 18th birthday gift in. It's a charm bracelet and a bunch of individual meaningful charms. None of them come in gift boxes, and I want something to present them all together in. Failing to find a gift box to fit the bill, I thought that this cute jewelry box would be a nice alternative. I am pleasantly surprised at what I received for the price. I expected a flimsy cardboard-ish box, and this is not that. It's not heirloom quality, but it is a nice sturdy box, well put together, and the interior tray and dividers are thick. Interior fabric is nicely soft and velvety. The box is larger than I expected, it will hold a good amount of jewelry, and it's pretty and of much better quality than I anticipated. Will certainly make a very nice presentation for my daughter's gift, and she'll be able to use it for many years, I'm sure.
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Reviewed in the United States on December 5, 2025
★★★★★ 5
Very nice Jewelry Box
Color: Jelly Pink
It was definitely worth the price I paid... it is able to hold a large variety of my Jewelry. It's very cute.
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Reviewed in the United States on May 18, 2026
★★★★★ 5
Not your average jewelry box....
Color: Sage Green
A lovely simple yet elegant jewelry box - nicely made with a practical design. It has substantial weight and opens and closes nicely. This sage green color is muted with a matte finish making it soft in appearance. The gold closure adds just the right amount of interest. I placed a beautiful pendant inside as a surprise and together, these made the perfect gift for a 40th birthday. Would buy again!
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Reviewed in the United States on May 18, 2026
★★★★★ 5
Excellent jewelry box
Color: Black
Perfect! Just what I wanted for my side table. Sturdy, organized and looks sleek. 10/10
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Reviewed in the United States on May 8, 2026
★★★★★ 4
Elegant Jewelry Organizer
Color: White, Color: White
The jewelry box exudes an elegant appearance. I ordered white, but the actual jewelry box is cream-colored. Nevertheless, I am pleased with the various organized compartments and the two-tiered design inside. The box is truly stunning and complements my dresser beautifully. Giving four stars due to the Misleading color.
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Reviewed in the United States on April 28, 2026