DC Miniature Circuit Breaker TDM7-DC

Technical Data

Installation

Combination with accessories

Overall and mounting dimensioned chart

Product Introduction

This DC circuit breaker is designed and manufactured strictly in accordance with the international standard IEC60947-1. With excellent electrical performance and stable operation, it is widely used in various DC power supply scenarios such as photovoltaic energy storage, DC distribution, and industrial control, providing reliable protection for circuit safety. ​

Core electrical parameters

1. Current specifications

Rated current (In): covering a wide range of 6-63A, it can be flexibly selected according to different circuit load requirements, and is suitable for diverse power consumption scenarios from low-power control circuits to medium power power circuits. ​
Breaking capacity: It has a rated ultimate breaking capacity (Icn) of 10KA and a rated short-circuit breaking capacity (Ics) of 7.5KA, which can quickly cut off the fault current in the event of a short circuit fault in the circuit, effectively suppress arc generation, and avoid equipment damage and safety accidents. ​

2. Pole number and voltage adaptation

Pole configuration: Provides four pole options: 1P, 2P, 3P, and 4P, to meet the wiring requirements of different circuits. 1P is suitable for single pole DC circuits, while 4P can adapt to multi pole joint protection scenarios, with strong compatibility. ​
Rated voltage (Ue): Accurately match the voltage level based on the number of poles -1P is 250Vdc, 2P is 500Vdc, 3P is 750Vdc, 4P is 1000Vdc, ensuring stable operation in the corresponding voltage environment and avoiding overvoltage damage. ​
Insulation voltage (Ui): The insulation voltage for 1P/2P specifications is 500V, and for 3P/4P specifications it is 1000V. The excellent insulation performance can effectively isolate the risk of leakage between circuits and improve product safety. ​

3. Other key performance indicators

Rated frequency: Supports 50/60Hz dual frequency adaptation, can adapt to different regional power grid frequencies without additional adjustments, enhancing the product's regional applicability. ​

Energy restriction level: reaching Class 3, it can quickly absorb and limit the fault energy when a short circuit fault occurs, reduce the impact of energy on circuit components, and extend the service life of equipment. ​

Trip Curve: Adopting BC type trip curve, it has both overload protection and short-circuit instantaneous protection functions. When overloaded, it slowly trips to avoid misoperation, and when short circuited, it quickly trips to ensure circuit safety. It is suitable for most industrial and civilian DC circuit protection needs. ​

Service life and reliability

The product has excellent durability, with an electrical lifespan of up to 4000 cycles and a mechanical lifespan of up to 20000 cycles, far exceeding the industry average. Whether it is frequent circuit on/off operations or long-term stable operation, it can maintain reliable performance, reduce maintenance costs and replacement frequency, and provide users with long-term stable circuit protection solutions.