SEAFLO SFCBS-300-202 Single Circuit ON/OFF Battery Disconnect Switch Manual
Product Overview
The SEAFLO SFCBS-300-202 is a single-circuit ON/OFF battery disconnect switch designed for marine applications. It allows for the isolation of a single battery to a single load group, providing essential control and safety for electrical systems.
Features
- Switches a single battery to a single load group
- Tin-plated copper studs for maximum conductivity and corrosion resistance
- Studs accept 3/8" (M10) ring terminals
- One-piece terminal stud design ensures durability and prevents loosening
- Isolating cover with three snap-off side pieces protects rear contacts and allows flexible wire access
Specifications
| Cranking Rating (30 sec.) | 900A DC |
| Intermittent Rating (5 min.) | 500A DC |
| Continuous Rating | 300A |
| DC Terminal Stud | Tin-Plated Copper, 3/8"-16 (M10) |
| Torque Specification | 120 in-lb (13.56 N·m) |
| Recommended Cable Size | 4/0 AWG (120 mm²) |
| Maximum Voltage Rating | 48 Volts DC |
| Ignition Protected | Yes |
Regulatory Compliance
- CE, RoHS, ISO 8846 compliant
- Meets American Boat and Yacht Council (ABYC) requirements for battery switches
- Meets UL 1500 and SAE J1171 external ignition protection requirements
- IP66 rated – protected against powerful water jets
Basic Connection Diagram
A schematic shows a battery connected to the input terminals of the SEAFLO switch. The output terminals of the switch are connected to an engine or a starter/other load.
Caution and Installation
Important Cautions
Before installation, disconnect the positive battery terminal. Consult a qualified electrical professional for proper wiring application. Ensure cables are correctly connected, especially for marine engines.
Installation Instructions
Refer to the latest edition of NFPA 302 and/or ABYC E11 Standard for detailed installation information.
- Attach one 4/0 AWG cable (or 120 mm²) per terminal to meet ratings.
- Battery cable terminals must be attached under nut and lock washer. Torque to 120 in-lb (13.56 N·m).
Operation
- Turn all appliances off before turning the battery switch to OFF.
- Do not switch to OFF while the engine is running.
Technical Diagrams
Dimensions
The SEAFLO SFCBS-300-202 switch has an overall diameter of approximately 2.591 inches (65.8mm) and a height of approximately 3.169 inches (80.48mm). The DC terminal studs are 3/8"-16 (M10).
Switch Mounting Options
The switch supports multiple mounting configurations:
- Surface Mounting (A): Requires a mounting hole of approximately 0.748 inches (19mm).
- Bulkhead Mounting (B): Requires a mounting hole of approximately 0.523 inches (13.3mm).
- Panel Mounting (C): For front or rear panel installation, it requires a main body hole of approximately 2.311 inches (59mm) and a shaft hole of approximately 0.149 inches (3.8mm).
Insulating Cover Removal
The insulating cover can be removed by applying steady inward pressure. The cover breakout diagram illustrates this process.
