The rated operational voltages for them are 200 to 440VAC. If using them in 100VAC or 110VAC circuit, earth-leakage prot

1. The internal resistance (per pole) is described in the catalog and technical notes. 2. Power consumption (W) = RI^2

Only ACB fixed type is available for DC circuits.

F-2SV is standard, F-2SVE is for emergency use. The difference is the color of the handle and its surroundings parts.

MCCB stands for "Molded Case Circuit Breaker." This is defined in the IEC standard, IEC 60947-2 and in the UL standard,

When making a transformer to energize, a large inrush current may flow. The circuit breaker is therefore required to pre

It may not trip a fault current or degrade insulation after tripping. When you connect the device in reverse, you must s

Please select rated current sensitivity ,according to the protection purpose and the protective grounding resistance val

Earth Leakage Circuit Breaker and Earth Leakage Relay operate at higher than 50% but not exceeding 100% of the rated res

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Low-voltage Circuit Breakers

Miniature Circuit Breakers(2)

FAQ within [ Low-voltage Circuit Breakers ]

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lower limit of operational voltage for DC

It is DC 24V. More Details >>
- No：24816
- Release Date：2019/04/09 15:17
- Category： Molded Case Circuit Breakers
4-pole type in 100VAC or 110VAC

The rated operational voltages for them are 200 to 440VAC. If using them in 100VAC or 110VAC circuit, earth-leakage protection does not operate. More Details >>
- No：24820
- Release Date：2019/04/09 15:10
- Category： Earth Leakage Circuit Breakers
Calorific value of the circuit breaker

1. The internal resistance (per pole) is described in the catalog and technical notes. 2. Power consumption (W) = RI^2 x Poles = Resistance (Ω) x Load curre... More Details >>
- No：38025
- Release Date：2021/01/22 17:39
- Category： Molded Case Circuit Breakers
ACB for DC circuit

Only ACB fixed type is available for DC circuits. More Details >>
- No：38027
- Release Date：2021/01/22 17:38
- Category： Air Circuit Breakers
Type name of the operating handle

F-2SV is standard, F-2SVE is for emergency use. The difference is the color of the handle and its surroundings parts. More Details >>
- No：38028
- Release Date：2021/01/22 17:37
- Category： Accessories and Related Components
MCCB and MCB as terms

MCCB stands for "Molded Case Circuit Breaker." This is defined in the IEC standard, IEC 60947-2 and in the UL standard, UL 489. MCB stands for "Miniature Ci... More Details >>
- No：22340
- Release Date：2018/08/31 14:33
- Category： Molded Case Circuit Breakers
Rating of a circuit breaker for transformers primary protection

When making a transformer to energize, a large inrush current may flow. The circuit breaker is therefore required to prevent unwanted trip. The selection of ... More Details >>
- No：22343
- Release Date：2018/08/31 14:33
- Category： Molded Case Circuit Breakers
Wrong connection in reverse

It may not trip a fault current or degrade insulation after tripping. When you connect the device in reverse, you must select a reverse-connectable model. More Details >>
- No：22345
- Release Date：2018/08/31 14:33
- Category： Molded Case Circuit Breakers
Select rated current sensitivity

Please select rated current sensitivity ,according to the protection purpose and the protective grounding resistance value of the load equipment. If you alre... More Details >>
- No：22346
- Release Date：2018/08/31 14:33
- Category： Earth Leakage Circuit Breakers
Rated current sensitivity

Earth Leakage Circuit Breaker and Earth Leakage Relay operate at higher than 50% but not exceeding 100% of the rated residual operating current IΔn. The eart... More Details >>
- No：22364
- Release Date：2018/08/31 14:33
- Category： Earth Leakage Circuit Breakers

31-40 of Total 124

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