Chint Push Button NP2-BD53

    The Chint Push Button NP2-BD53 is a three-position self-resetting knob switch specifically designed for industrial control circuits. It is suitable for scenarios such as manual/automatic conversion and status switching of mechanical equipment.

 I. Core Technical Parameters and Design Features

1. Electrical Performance

- **Rated Voltage**: 415V AC / 250V DC, compliant with the GB/T 14048.5 standard, and compatible with various industrial voltage environments.

- **Rated Current**: The conventional free-air thermal current is 10A, suitable for loads in regular control circuits. The silver-plated contact surface reduces contact resistance, ensuring reliability under low-voltage and low-current conditions.

- **Mechanical Life**: The knob-type product can withstand up to 300,000 operations. Combined with a modular structure design, it supports flexible combination of contact modules (e.g., two normally open contacts, one normally open and one normally closed contact, etc.).

2. Protection and Safety

- **Protection Level**: The head has an IP40 protection level (dust-proof). For IP65 water and dust protection, customization is required (with the suffix "C" in the model).

- **Certification Coverage**: It has obtained multiple certifications including CCC, CE, and UL, meeting the access requirements of domestic and international markets. In particular, the UL certification provides safety guarantees for applications in North America.

3. Structural Design

- **Metal Material**: The letter "B" represents a metal operating head, which is wear-resistant and impact-resistant, and suitable for mounting panels with a thickness of 1-6mm.

- **Three-Position Reset**: The letter "D" indicates knob operation, and the number "5" represents the three-position self-resetting function. It automatically returns to the middle position when released, preventing misoperation.

- **Contact Design**: It adopts a sliding self-cleaning technology, which can remove the oxide layer on the contact surface and ensure no failure after millions of contacts.

 II. Application Scenarios and Selection Reference

1. Typical Applications

- **Industrial Equipment Control**: For example, manual/automatic mode switching of machine tools and production lines, and status selection requiring frequent operations.

- **Power Systems**: Multi-gear parameter adjustment in power distribution cabinets, or used as a composite switch for signal indication and control.

- **Non-Standard Machinery**: Cooperating with PLC to realize multi-logic control, such as a three-position knob corresponding to the three states of "forward rotation - stop - reverse rotation".

2. Selection Notes

- **Contact Type**: The NP2-BD53 is equipped with two normally open contacts by default (the number "3" represents two normally open contacts). If normally closed or mixed contacts are needed, other models should be selected (e.g., NP2-BD55 has one normally open and one normally closed contact).

- **Indicator Light Function**: If a model with a light is required, attention can be paid to the NP2-BW series (e.g., NP2-BW1161), which supports AC/DC 6-220V LED light sources, featuring high brightness and a service life of ≥30,000 hours.

- **Installation Size**: The panel opening size is Φ22.3mm, which is compatible with the standards of mainstream control cabinets.

III. Market Price and Purchase Channels

1. Price Range

- **International Procurement**: Cross-border purchases can be made via WhatsApp: 0086-13811255435. The unit price including shipping is approximately 7.64-21.21 RMB, with a logistics cycle of about 3-7 working days.

2. Purchase Recommendations

- **Domestic Users**: Priority should be given to purchasing via WhatsApp: 0086-13811255435 to ensure genuine products and after-sales support.

- **Overseas Users**: Orders can be placed by contacting WhatsApp: 0086-13811255435. Attention should be paid to the voltage standard (e.g., models with UL certification are required for North America).

 IV. Usage and Maintenance Recommendations

1. Installation Specifications

- The terminal blocks use M3.5 screws, and the tightening torque should be controlled within 0.8-1.2N·m to avoid damaging the terminals due to over-tightening.

- For IP65 protection, the letter "C" must be specified in the model, and it is necessary to confirm that the sealing accessories are installed in place.

2. Maintenance Points

- Regularly check the contact status, and clean the surface with anhydrous alcohol to prevent oil stains or dust accumulation from affecting the contact performance.

- It is recommended to cut off the power supply before long-term shutdown to prevent contact oxidation.

 V. Frequently Asked Questions (FAQs)

- **Q: What is the difference between NP2-BD53 and NP2-BD33?**  

  A: NP2-BD33 is a three-position locking knob (manual reset required), while NP2-BD53 is a three-position self-resetting knob that automatically returns to the middle position when released, making it suitable for temporary switching scenarios.

- **Q: Can it be used in a 24V DC circuit?**  

  A: Yes. Its rated DC voltage reaches 250V, so 24V is within the safe working range. However, attention should be paid to matching the contact capacity with the load current.