ML-ACR Heavy Duty Automatic Charging Relay 12V [Bulk]
7620100B

Features
- 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
- LED output to remotely indicate when batteries are combined, isolated, in voltage lockout, or in Start or Engine isolation
- 3/8"-16 tin-plated copper studs for maximum conductivity and corrosion resistance
- 7/8" (22mm) stud length accepts multiple cable terminals
- Silver alloy contacts provide high reliability for switching live loads
- Label recesses for circuit identification
Documents
InstallationReferenceArticles
ML-Series Heavy Duty ACR Supports High Amp Charging and Emergency Cross Connect
The Benefit of Serrated Flange NutsMarketing Materials
Articles
ML-Series Heavy Duty ACR Supports High Amp Charging and Emergency Cross Connect
The Benefit of Serrated Flange NutsMarketing Materials


Specifications
Control Circuit Connection ![]() | Deutsch DTM |
Nominal Voltage | 12V 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 |
Continuous Rating ![]() | 500A |
Intermittent Rating ![]() | 700A (5 min) |
Cranking Rating 10 sec ![]() | 2500A |
Cranking Rating 1 min ![]() | 1100A |
Cable Size to Meet Ratings | 4/0 AWG x 2 |
Live Current Switching | 300A @ 12V DC |
Switching Cycles | 100000 |
Terminal Ring Diameter Clearance | 1.18in (29.97 mm) |
Terminal Stud Length | 1.50in (38.1 mm) |
Terminal Stud Size | 3/8-16 (M10) |
Terminal Stud Torque | 140 in-lb (15.82 Nm) |
Relay Contact Position | SPEC_HEADER |
Combine 30 sec | 13.5V |
Combine 90 sec | 13.0V |
Open 10 sec | 12.35V |
Open 30 sec | 12.75V |
Open High | 16.2V |
Regulatory Specifications
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Optional Accessories
![]() | 9160 | ML Series Link Bus |