Blue Sea Systems ST-CLB 6-Position Common Source Circuit Breaker Block 5052, 32V DC, 32A Per Circuit, 100A Block

The Blue Sea Systems ST-CLB Circuit Breaker Block, part number 5052, is a common source circuit breaker block that distributes power from a single 100-amp source to six individually switched 32-amp circuits. Instead of wiring six separate single circuit breakers back to a common bus, this block combines the common bus and six switched breaker positions into one compact, panel-mount unit, simplifying installation and reducing wiring clutter on the boat's electrical panel.

Each of the six positions is rated up to 32 amps DC at 32 volts maximum, while the block as a whole is rated up to 100 amps common source. The busses and screw terminals are tin-plated copper and accept ring terminals for a secure connection. Quick connect clips allow the circuit breakers to snap easily into place in the block, and breakouts allow wire access from two directions to accommodate different wiring layouts. A clear insulating cover with square format label recesses lets each circuit be labeled while satisfying ABYC and USCG insulation requirements. Two ST-CLB terminal block jumpers can be added to allow three of the switched circuits to run on a non-24-hour source, giving flexibility for circuits like bilge pumps, clocks, or alarms that need to stay powered independently of the main switched circuits.

This circuit breaker block is intended for DC electrical panels on boats where multiple lower-amperage circuits, such as switched accessories, lighting, or electronics, are fed from a single power source.

Specifications

• Brand: Blue Sea Systems
• Manufacturer Part Number: 5052
• Circuit Breaker Type: Standard
• Number of Positions: 6
• Number of Poles: 1
• Mounting Type: Clip-In Mount
• Max Voltage: 32 Volts DC
• Max Amperage Per Circuit: 32 Amps
• Max Amperage Per Block (Common Source): 100 Amps
• Terminal Type: Screw Terminals, Accepts Ring Terminals
• Bus Material: Tin-Plated Copper
• Cover: Clear Insulating Cover with Label Recesses, ABYC/USCG Compliant
• Weight: 0.75 pounds

Frequently Asked Questions

What is the ST-CLB Circuit Breaker Block used for? The Blue Sea Systems ST-CLB block, part number 5052, distributes power from a single common source to six individually switched circuits, so it is used to feed multiple lower-amperage DC circuits, such as accessories, lighting, or electronics, from one power feed on a marine electrical panel.

How many amps does each circuit position handle? Each of the six switched positions on the 5052 block is rated up to 32 amps DC, while the block's common source bus is rated up to 100 amps total.

What voltage is the ST-CLB 5052 block rated for? It is rated for a maximum of 32 volts DC, matching standard 12V and 24V marine electrical systems.

Does the block accept ring terminals? Yes, the busses and screw terminals on the Blue Sea Systems 5052 are tin-plated copper and accept ring terminals for a secure connection.

Is the 5052 circuit breaker block ABYC compliant? Yes, the clear insulating cover on the 5052 satisfies ABYC and USCG insulation requirements while still allowing each circuit to be labeled.

How does wiring access work on this block? Breakouts on the ST-CLB block allow wire access from two directions, giving flexibility for how cables are routed to and from the block.

Can some circuits on the block run independently of the others? Yes, adding two ST-CLB terminal block jumpers allows three of the six switched circuits to be powered from a non-24-hour source separate from the other circuits, which is useful for loads like bilge pumps, a clock, or alarm circuits.

How does the ST-CLB block mount to the breakers? The 5052 block uses quick connect clips that allow standard circuit breakers to snap easily into place in each of the six positions.

How is the 5052 different from wiring six separate circuit breakers? The ST-CLB block combines the common source bus and six switched breaker positions into one unit, so installers do not need to individually wire six separate single circuit breakers back to a common bus.

What is the weight of the Blue Sea Systems 5052 circuit breaker block? The 5052 circuit breaker block weighs 0.75 pounds.

What material are the internal busses made of? The internal busses and screw terminals on the 5052 are tin-plated copper.