Schneider C253TM250 ComPacT NSX250 Trip Unit 3P 250 A TMD

The Schneider Electric C253TM250 is a TMD trip unit designed for use with the ComPacT NSX250 circuit breaker, providing 3-pole thermomagnetic protection rated at 250 A. It delivers overload (thermal) and short-circuit (magnetic) protection for power distribution applications, with adjustable long-time and instantaneous pick-up settings.

Technical specifications:

• Commercial reference: C253TM250
• Manufacturer: Schneider Electric
• EAN:
• Series / range: ComPacT NSX100...250 new generation
• Product type: Trip unit
• Trip unit name: TM-D
• Trip unit technology: Thermomagnetic
• Compatible circuit breaker: ComPacT NSX250 new generation
• Number of poles: 3P
• Protected poles: 3d
• Trip unit rating: 250 A at 40 °C
• Rated voltage [Ue]: 690 V AC 50/60 Hz
• Network type: AC
• Network frequency: 50/60 Hz
• Mounting mode: Fixed
• Long-time pick-up [Ir] adjustment range: 0.7...1 x In (adjustable)
• Long-time delay [tr] adjustment: Fixed - 120...400 s at 1.5 x In; 15 s at 6 x Ir
• Instantaneous pick-up [Ii] adjustment range: 5...10 x In (adjustable)
• Differential protection: None
• IP protection rating: IP40 per IEC 60529
• Operating temperature: -25...70 °C
• Storage temperature: -50...85 °C
• Pollution degree: 3 per IEC 60947-1
• Electric shock protection class: Class II
• Standard: EN/IEC 60947-2
• Weight: 450 g

Features and benefits:

• Thermomagnetic protection combining thermal overload and magnetic short-circuit functions in a single trip unit
• Adjustable long-time pick-up Ir from 0.7 to 1 x In allows fine-tuning of overload protection threshold
• Adjustable instantaneous pick-up Ii from 5 to 10 x In enables flexible short-circuit response settings
• IP40 enclosure rating and Class II electrical shock protection for safe panel installation
• Wide operating temperature range of -25 to 70 °C suited to demanding environments

Applications:

• Power distribution boards requiring adjustable overload and short-circuit protection
• Industrial switchgear panels using ComPacT NSX250 circuit breakers
• Commercial and industrial electrical installations up to 690 V AC
• Applications requiring customisable protection thresholds for varying load profiles

Compliant with EN/IEC 60947-2. Part of the Schneider Electric ComPacT NSX new generation range.

Also known as: Schneider C253TM250, Schneider Electric C253TM250, NSX250 thermomagnetic trip unit, ComPacT NSX250 TMD protection unit.