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Get Your Ml-acr Automatic Charging Relay - 24v Dc 500a Easy Assembly [PvsxMLyG]

$54.99 $175.99 -69%

500 Amp magnetic latching (bi-stable) relay automatically combines batteries during charging and isolates batteries when discharging and when starting the engineSpecificationsControl Circuit ConnectionTinned Wire*Nominal Voltage24V DCManual Control**

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Get Your Ml-acr Automatic Charging Relay - 24v Dc 500a Easy Assembly [PvsxMLyG]

Blue Sea Systems

500 Amp magnetic latching (bi-stable) relay automatically combines batteries during charging and isolates batteries when discharging and when starting the engine

Specifications
Control Circuit Connection Tinned Wire*
Nominal Voltage 24V DC
Manual Control** No
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 1.12in (28.45 mm)
Terminal Stud Length 1.50in (38.1 mm)
Terminal Stud Size 3/8" - 16 (M10)
Wire Size 20 AWG
Relay Contact Position  
Combine 30 sec 27.0V
Combine 90 sec 26.0V
Open 10 sec 24.7V
Open 30 sec 25.5V
Open High 32.4V
Weight 2.08lb (0.94 kg)

*Provided on retail units

**Manual control switch provides an added level of safety allowing control with or without power and offering LOCK OFF capability for servicing

***Condition: Two engines are running

  • One relay is open and one relay is closed
  • Engine 1 Start and Engine 2 Start batteries are isolated to protect engine electronics

****Condition: Engine starting

  • Relay is closed combining batteries
  • Batteries are combined to share power in the event of a low start battery

*****Condition: Engine starting

  • Relay is open isolating batteries
  • Batteries are isolated to protect sensitive electronics from voltage sags and spikes

******@ 25°C nominal VDC

*******The maximum current a switch is designed to conduct for an indefinite period

********The maximum amount of current a switch is designed to carry for a minimum of a designated period of time

*********Normally associated with 'cranking current' which is the current required by the starter circuit prior to engine starting. The cranking current varies significantly during the starting cycle. Initially, there is a large surge of current required to overcome the inertia and compression of the engine. This surge can be two to four times the average cranking current. Once the engine is turning there are peaks and valleys as the pistons go through the compression and exhaust cycles. The cranking current rating is used for sizing batteries, cables, and battery switches

What Our Customers Say

January 22, 2026

Absolutely no complaints!

The functionality is cleverly designed.

- Serenity C..

January 22, 2026

Absolutely no complaints!

The engineering on this is top-notch.

- Emily X..

January 22, 2026

Absolutely no complaints!

Very happy with this. It is highly recommended.

- Edna R..

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