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Blue Sea Systems

Blue Sea 5032 ST Blade Split Bus Fuse Block wiring diagram

Two isolated groups of six ATC/ATO fused circuits share a common negative bus. Use one group for switched loads and the other for 24-hour circuits. Rated 30 A per circuit, 80 A per group and 100 A total at up to 32 V DC.

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Compatible systems
12 V / 24 V

Wiring diagram

How the Split bus · 5032 is wired.

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Blue Sea 5032 ST Blade Split Bus Fuse Block wiring example with 3 components: Source bank, Split bus · 5032, Reference load. 4 cable connections. Crossings are not junctions.Source bank + to Split bus · 5032 24H +: 16 mm² · 25 A fuse, 3 m one way. Split bus · 5032 24H 1 to Reference load +: 10 mm² · 25 A fuse, 3 m one way. Source bank − to Split bus · 5032 − 2: 16 mm², 3 m one way. Split bus · 5032 − 1 to Reference load −: 10 mm², 3 m one waySource bank + to Split bus · 5032 24H +: 16 mm² · 25 A fuse, 3 m one waySplit bus · 5032 24H 1 to Reference load +: 10 mm² · 25 A fuse, 3 m one waySource bank − to Split bus · 5032 − 2: 16 mm², 3 m one waySplit bus · 5032 − 1 to Reference load −: 10 mm², 3 m one way12 V 200 Ah source bankSource bank++−−Blue Sea 5032 ST Blade Split Bus Fuse BlockSplit bus · 503224H +24H +24H 124H 1− 1− 1− 2− 212 V reference loadReference load++−−16 mm² · 25 A fuse10 mm² · 25 A fuse16 mm²10 mm²
Blue Sea 5032 ST Blade Split Bus Fuse Block wiring example with 3 components: Source bank, Split bus · 5032, Reference load. 4 cable connections. Crossings are not junctions.Red = positive · dark = return · dashed = signal. Cable labels are example values; use the equipment instructions and actual installation lengths.
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Cable sizing for this example

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Technical reference

Specifications and terminal map.

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Catalog specification

Two isolated groups of six ATC/ATO fused circuits share a common negative bus. Use one group for switched loads and the other for 24-hour circuits. Rated 30 A per circuit, 80 A per group and 100 A total at up to 32 V DC.

Compatible systems
12 V / 24 V

Terminal map

Catalog connection points, current direction and planning limits. Check the manufacturer's pinout and connector ratings before installation.

24H +

positive · input

80 A

SW +

positive · input

80 A

NEG

negative · bidi

100 A

24H 1

positive · output

30 A

24H 2

positive · output

30 A

24H 3

positive · output

30 A

24H 4

positive · output

30 A

24H 5

positive · output

30 A

24H 6

positive · output

30 A

SW 1

positive · output

30 A

SW 2

positive · output

30 A

SW 3

positive · output

30 A

SW 4

positive · output

30 A

SW 5

positive · output

30 A

SW 6

positive · output

30 A

− 1

negative · bidi

30 A

− 2

negative · bidi

30 A

− 3

negative · bidi

30 A

− 4

negative · bidi

30 A

− 5

negative · bidi

30 A

− 6

negative · bidi

30 A

− 7

negative · bidi

30 A

− 8

negative · bidi

30 A

− 9

negative · bidi

30 A

− 10

negative · bidi

30 A

− 11

negative · bidi

30 A

− 12

negative · bidi

30 A
Sources and sizing method

Equipment specifications. Model details, ratings and terminal roles come from the catalog. Check your unit’s label and current manufacturer documentation for its exact revision.

Example sizing. Cable labels apply to the connected example, not a fixed cable size for this component. Set your actual equipment, current, lengths and installation conditions in Crimp before choosing hardware.

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