NS30AB NS30A MNS30AB MNS30A series
Nihon Kiko's complete electromagnetic circuit breaker New-FM wiring circuit breaker
In the midst of the fervent atmosphere, unwavering calmness. A completely electromagnetic breaker that is not swayed by the surrounding temperature!
NS30A / NS30AB (General Wiring Protection) This is a 30AF circuit breaker designed to reliably protect electric heating, lighting, and various control power circuits within industrial machinery and control panels. Thanks to its fully electromagnetic design, it does not malfunction even when the internal temperature rises due to high-density mounting. In addition to the standard surface wiring model "NS30A (NS32A/NS33A)," we offer the "NS30AB (NS32AB/NS33AB)" which allows for stud wiring from the back of the panel. This enables optimal layout design tailored to the panel structure, achieving a smart panel configuration that minimizes wiring exposure on the surface and saves space. 3. MNS30A / MNS30AB (Motor Protection Compatible) This is a motor protection compatible model designed to handle the transient high inrush currents that occur during the startup of three-phase and single-phase induction motors (such as pumps, fans, compressors, etc.). It features a motor-specific delay characteristic using an oil dashpot, ensuring that unnecessary trips during startup are reliably prevented, while also providing rapid disconnection in milliseconds during abnormal conditions such as binding or short circuits. We offer both the standard wiring model "MNS30A" and the back wiring model "MNS30AB," achieving toughness for immediate re-engagement even in environments with heavy startup loads, along with flexible internal panel mounting capabilities.
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basic information
Nihon Kiko Manufacturing's Complete Electromagnetic Circuit Breaker New-FM Wiring Circuit Breaker NS30AB (NS32AB NS33AB) NS30A (NY32A NS33A) MNS30AB (MNS33AB) MNS30A (MNS33A) If the load is a motor ➔ MNS (Large Inrush Current Delay) If the load is general power or a heater ➔ NS (General Wiring Protection) If the wiring method of the panel is surface-mounted ➔ No suffix (A) If it is back-connected or has a special panel structure ➔ Suffix "B" (AB) *Presence or absence of the initial "M": No mark (NS) = for general wiring protection, with M (MNS) = for motor protection (motor breaker) *Presence or absence of suffix "B": Back-connection (Back-connection / panel back wiring specification) or differences in mounting method and terminal specifications (compared to standard surface type, back type or panel internal mounting compatible specifications)
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Applications/Examples of results
◎Applications suitable for NS30A / NS30AB - Control power branching for industrial machinery and FA panels Protection of circuits with relatively small inrush currents, such as switching power supplies, transformer primary sides, and heater circuits. - Distribution boards with specified rear wiring (※NS30AB) For sealed control panels where a tidy surface is desired, or for internal circuits using rear wiring duct methods. ◎Applications suitable for MNS30A / MNS30AB - Immediate protection for small motors For fans, blowers, cooling water pumps, conveyor drive motors, etc. Equipped with oil dashpot delay (motor characteristics) that allows several times the rated inrush current at startup, preventing false trips during startup. - Motor control centers (MCC) with limited panel space Equipment that wants to incorporate branch protection for each motor in a space-saving manner. Selection points - If the load is a motor ➔ MNS (large inrush current delay) - If the load is general power or heater ➔ NS (general wiring protection) - If the panel wiring method is surface ➔ no suffix (A) - If rear connection or special panel structure ➔ suffix "B" (AB)
Detailed information
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Nihon Kōsokudō's fully electromagnetic circuit breaker New-FM wiring circuit breaker NS30AB (NS32AB NS33AB) NS30A (NY32A NS33A) MNS30AB (MNS33AB) MNS30A (MNS33A)
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Nihon Kiko Manufacturing's complete electromagnetic circuit breaker New-FM wiring circuit breaker NS30AB (NS32AB NS33AB) NS30A (NY32A NS33A) MNS30AB (MNS33AB) MNS30A (MNS33A) Frame size (AF)・Number of poles (2 poles・3 poles)・Basic model names (NS32AB NS33AB NS32A NS33A MNS33AB MNS33A) Rated insulation voltage・Rated operating voltage・Standard rated current (A)・Instantaneous trip type (IT)・Instantaneous trip current value (A)・Rated interrupting capacity (kA)・Surface-mounted product weight (kg)・Remarks
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Nihon Kōsokudō's fully electromagnetic circuit breaker New-FM wiring circuit breaker NS30AB (NS32AB NS33AB) NS30A (NY32A NS33A) MNS30AB (MNS33AB) MNS30A (MNS33A) Operating time - temperature correction curve
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Nihon Kōsokudō's complete electromagnetic circuit breaker New-FM wiring circuit breaker NS30AB (NS32AB NS33AB) NS30A (NY32A NS33A) MNS30AB (MNS33AB) MNS30A (MNS33A) Operating characteristic curve
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Nihon Kōsokudō's fully electromagnetic circuit breaker New-FM wiring circuit breaker NS30AB (NS32AB NS33AB) NS30A (NY32A NS33A) MNS30AB (MNS33AB) MNS30A (MNS33A) Operating characteristic curve
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Nihon Kōsokudō's fully electromagnetic circuit breaker New-FM wiring circuit breaker NS30AB (NS32AB NS33AB) NS30A (NY32A NS33A) MNS30AB (MNS33AB) MNS30A (MNS33A) External dimension diagram
Line up（4）
| Model number | overview |
|---|---|
| NS30A(NS32A NS33A) | General wiring protection (surface type) main load targets (resistive loads, heaters, power supplies, control circuits) for standard surface wiring and terminal connections. |
| NS30AB(NY32AB NS33AB) | General wiring protection (back surface shape, etc.) Main load targets (similar to the above, wiring according to panel structure) Supports wiring from the back side of the panel and specific mounting structures. |
| MNS30A(MNS33A) | Motor protection combined use (surface type) Main load targets (three-phase/single-phase motors, compressors, pumps) Delay characteristics that do not cause false tripping due to starting inrush current. |
| MNS30AB(MNS33AB) | Motor protection and combined use (back surface shape, etc.) Main load targets (motor load above, wiring according to panel structure) Motor characteristics + back surface wiring and panel structure compatibility |
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Company information
Nikko Electric's new base, Satellite Akiba (Tokyo, Akihabara), opened in February 2024. We aim to create a facility that connects not only sales but also factory technology and the web, allowing us to propose the most optimal transformers in real-time! If you have any issues regarding transformers, coils, or reactors, please feel free to consult with Nikko Electric. We will propose the best transformers through discussions with our customers.
