Circuit breakers

15 products
15 products
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SHB fuse SHB fuse

navico

SHB fuse

From €2,12
From €2,12
FSS Flat Fuse Set

philippi

FSS Flat Fuse Set

€4,80
€4,80
Overcurrent protection switch 1610-21

e-t-a

Overcurrent protection switch 1610-21

From €16,00
From €16,00
Overcurrent protection switch 1170-01

e-t-a

Overcurrent protection switch 1170-01

From €18,00
From €18,00
122223301

e-t-a

SKL fuse terminal

From €8,00
From €8,00
Overcurrent protection switch 1140-G111-P1M1

e-t-a

Overcurrent protection switch 1140-G111-P1M1

From €18,20
From €18,20
111709000

e-t-a

Plug-in base for automotive fuse 12-P10

€7,50
€7,50
Overcurrent protection switch 2-5700-IG1-K10-DD

e-t-a

Overcurrent protection switch 2-5700-IG1-K10-DD

From €28,00
From €28,00
Circuit breaker 4130-G211-K4M1

e-t-a

Circuit breaker 4130-G211-K4M1

From €40,60
From €40,60
Protective caps B017 / B006

e-t-a

Protective caps B017 / B006

From €11,60
From €11,60
Flat blade fuse holder ASH 6 / ASH 8

philippi

Flat blade fuse holder ASH 6 / ASH 8

From €9,90
From €9,90
ESF 5 fuse block

philippi

ESF 5 fuse block

€39,90
€39,90
Circuit breaker for CLB

navico

Circuit breaker for CLB

From €8,00
From €8,00
Panel MPE 120

philippi

Panel MPE 120

€16,00
€16,00
Fuse holder ASH 1

philippi

Fuse holder ASH 1

€2,50
€2,50

Circuit breakers

On-board installation

Cable protection

Securing electrical systems is one of the most important aspects of onboard safety.


The standard DIN EN ISO 10133 describes electrical DC installations. In addition to the well-known protection of individual consumer supply lines on switchboards, one of the most important aspects is the protection of all main lines directly at the battery. A functioning protection concept stipulates that the first fuse (main fuse) should be placed as close as possible to the battery. The large cross-sections of wires connected directly to the battery are capable of carrying high currents in the event of a short circuit. The energy released in the battery and the wiring quickly leads to overheating and subsequent fire. Even a small starter battery stores enough energy to set a large yacht on fire. Therefore, care must be taken to ensure that the cable from the battery to the first fuse is as short as possible and mechanically protected. The adjacent diagram shows the setup of the protection directly at the battery system.

All outgoing cables leading to the switchboard, charger, anchor winch, measuring instruments, heaters, etc., must be fused according to their respective cable cross-section. For example, a 50 A fuse is used for the 16 mm² switchboard supply cable. The subsequent cables leading to the consumers, which have a smaller cross-section, are fused at the switchboard, so they do not need to be considered when determining the supply cable fuse rating. The main battery switch for disconnecting the electrical system is installed near the battery.

Safety-relevant components, such as the bilge pump, alarm system, or the power supply for important navigation instruments, are connected directly to the battery to prevent accidental shutdown. These lines are also fused according to their cable cross-section. Circuit breakers are the preferred method of protection; alternatively, suitable strip fuses can be used.