Relays-&-Power-Distribution > Blue-Sea-Systems-Automatic-Charging-Relays

Blue Sea Systems SI-ACR Automatic Charging Relay

Blue Sea Systems SI-ACR Automatic Charging Relay w/Optional Start Isolation automatically combines batteries during charging, isolates batteries when discharging and when starting engines. Features 120A continuous rating to support high output alternators. 12V/24V DC auto ranging voltage input. Senses charging on two battery banks, side and bottom knockouts for cable connections. Clip-on cover insulates terminal connections. Studs accept multiple cable terminals. One-piece stainless flange nuts ensure safe and secure connections. Integrated LED indicates ACR status. Quick connect terminals for ground and optional features. Optional features: Start Isolation allows temporary isolation of House loads from Engine circuit during engine cranking to protect sensitive electronics from sags and spikes.


  • Intermittent Rating: 5 minutes, 210A
  • Continuous Rating: 120A
  • (Combine) Amperage Operating Current: 175mA. (Open) Amperage Operating Current: 15mA.
  • Nominal Voltage: 12V/24V
  • Cable Size to Meet Current Ratings: 1 AWG (50mm²). Maximum Cable Size: 1/0 AWG (50mm²).
  • Terminal Stud Size: 3/8"-16 (M10)
  • CE marked, ISO 8846. Meets UL 1500 and SAE J1171 external ignition protection requirements. IP67 - protected against immersion up to 1 meter for 30 minutes.
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75983 12/24 Automatic Charging Relay (BSS 7610) (1 MIN) 113.27 1 EA
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