Chint DZ158-3P100A

Chint DZ158-3P100A is a high-current miniature circuit breaker (MCB) suitable for three-phase circuits. It is mainly used in power distribution systems below 400VAC to provide overload and short-circuit protection.

 I. Core Parameters and Functions

1. Electrical Specifications

Rated Current: 100A, suitable for power distribution protection of high-power equipment (such as central air conditioners, industrial motors).

Breaking Capacity: 6kA (standard type) or 10kA (Type H), which can quickly cut off short-circuit current to protect line safety.

Pole Number: 3P, which controls three-phase live wires and has no neutral wire connection.

2. Design Features

Compact Structure: With a width of approximately 50mm, it supports standard 35mm DIN rail installation, saving space in the distribution box.

Visual Status Indication: A green window indicates "Closed" and a red window indicates "Open", facilitating intuitive judgment of the working status.

Impact Resistance: Certified to IEC 60947-2, it can withstand instantaneous high-current impacts and is suitable for both industrial and household environments.

 II. Discontinuation and Alternative Solutions

1. Discontinuation Status

Discontinued for Sale: Chint's official website shows that the DZ158-3P100A has been discontinued for sale.

Alternative Model: It is recommended to upgrade to the NXB-125 Series. This series has an improved breaking capacity of 10kA, supports Type C (lighting/resistive loads) and Type D (motor/inductive loads) tripping curves, and is dimensionally compatible with the original installation rails.

2. Earth Leakage Protection Option

- If earth leakage protection is required, the DZ158LE-125 3P+N 100A can be selected. The residual operating current is available in options such as 30mA and 100mA, and it integrates overload, short-circuit, and earth leakage protection functions.

 III. Price and Market Status

1. Reference Prices

Standard Type: The unit price is approximately 46-97 RMB. For bulk purchases (100 units or more), the price can be as low as 82.92 RMB per unit.

Earth Leakage Type (DZ158LE-125): The price is approximately 120-150 RMB, depending on the residual current specification.

Alternative Model NXB-125: The 3P C100 type costs approximately 117 RMB, offering higher cost-effectiveness.

2. Purchase Channel

- The new NXB-125 series can be purchased via WhatsApp: 0086-13811255435.

 IV. Installation and Usage Recommendations

1. Installation Precautions

Wiring Requirements: Use a tightening torque of 3.5N·m to ensure firm terminal connections and prevent overheating caused by poor contact.

Environmental Limitations: The operating temperature range is -5℃~+40℃, and the altitude should not exceed 2000 meters. Humid and dusty environments should be avoided.

2. Compatibility and Alternative Solutions

- When replacing with the NXB-125, attention should be paid to the selection of the tripping curve: Type C is suitable for conventional loads, and Type D is suitable for impact loads such as motors.

- If space in the distribution box is limited, the NXB-125 3P D100 can be considered. It has the exact same dimensions as the DZ158, eliminating the need to modify the installation bracket.

 V. User Reviews and Reliability

1. Practical Application Feedback

- Most users report that the DZ158-3P100A has strong stability and can effectively handle the starting impact of high-power equipment, making it particularly suitable for scenarios where multiple household appliances operate simultaneously.

- Some users mention that it has a comfortable operating feel, and the widened handle design facilitates quick switching (closing and opening).

2. After-Sales Service and Quality Assurance

- Chint provides a 1-year warranty, but after-sales support for discontinued models may be limited. It is recommended to prioritize alternative models to ensure long-term service.

 VI. Summary and Recommendations

Applicable Scenarios: Main circuit protection for three-phase industrial equipment and household high-power appliances, especially suitable for scenarios requiring high-current breaking capacity.

Purchase Decision: If immediate use is needed and the budget is limited, the remaining inventory of DZ158-3P100A can be purchased; if long-term stability is pursued, upgrading to the NXB-125 series is recommended, as it offers better performance and wider compatibility.

Safety Reminder: Before installation, confirm that the circuit parameters match, and the installation should be performed by a professional electrician to avoid accidents caused by incorrect model selection or wiring errors.

With the above information, users can make a reasonable choice based on their actual needs and budget. For three-phase high-current protection, the NXB-125 series has become a more reliable mainstream solution, while the remaining inventory of DZ158-3P100A can still be used for temporary or emergency purposes.