Overcurrent circuit breaker, 3P, E selective characteristic, 25A, 25kA, AC | S753DR-E25 2CDH783001R0252

Overcurrent circuit breaker 3P – reliable installation protection

This three-pole overcurrent circuit breaker, with selective E characteristic and rated current of 25A, is a key element ensuring safety and continuity of operation in electrical installations. The rated switching capacity of 25kA guarantees an effective response in the event of short circuits and overloads. DIN rail mounting simplifies installation and integration with the existing system.

Characteristics and application

The S753DR-E25 circuit breaker is designed for applications requiring selectivity, i.e. the ability to disconnect only the damaged circuit without disconnecting the entire installation. The E characteristic means a delayed response to current increase, which is particularly important in circuits with devices with high starting current – e.g. motors or transformers. This minimizes the risk of unnecessary shutdowns caused by temporary load surges. The rated voltage of 400V and insulation of 690V make it suitable for a wide range of applications in commercial, industrial buildings and in residential installations with higher power demand.

Key features and benefits

• Selectivity: E characteristic provides selective protection, minimizing downtime caused by unnecessary shutdowns.
• High breaking capacity: Switching capacity of 25kA guarantees effective circuit interruption in the event of a short circuit, protecting devices and infrastructure.
• DIN rail mounting: Enables quick and easy installation and replacement in existing switchboards.
• Wide range of applications: Suitable for protecting circuits with motors, transformers and other receivers with high starting current.
• Safety: Compliance with standards ensures safe and reliable operation of the device.
• Durability: Made of high-quality materials, which translates to long life and resistance to environmental conditions (IP20).
• Overvoltage category IV: Provides protection against the effects of atmospheric and switching surges.

Technical parameters in a nutshell

The circuit breaker is characterized by three poles, rated voltage of 400V and insulation of 690V. Its design is in accordance with DIN 43880 standard (construction size 3), which ensures compatibility with most standard switchboards. The degree of protection IP20 indicates protection against finger contact and against the ingress of solid objects larger than 12.5 mm. The operating frequency is 50 Hz and the pollution degree is 3 - this means that the device is adapted to work in environments with a moderate degree of pollution.