Schneider C253TM250 Trip Unit TM250D

The C253TM250 Schneider is a TM250D thermal-magnetic trip unit designed for installation in ComPacT NSX250 circuit breakers. It supports 3-pole (3D) configurations and is rated for 250 A at 40 °C, providing dependable overload and short-circuit protection in high-capacity low-voltage systems.

Equipped with adjustable thermal protection and fixed magnetic tripping, it ensures fast fault clearance and long-term system reliability. The 3D setup is ideal for standard three-phase applications without neutral monitoring.

Certified to IEC 60947-2 standards, this unit guarantees safe, durable operation in commercial and industrial environments.

Technical Specifications

• Model: C253TM250
• Type: Thermal Magnetic Trip Unit TM250D
• Brand: Schneider Electric
• Range: ComPacT NSX New Generation

Power & Performance

• Rated Current: 250 A at 40°C
• Poles: 3P (Three Poles)
• Protected Poles: 3D (Three Protected Poles)
• Trip Unit Technology: Thermal-Magnetic
• Protection Functions:
  • L (Thermal): Overload Protection
  • I (Magnetic): Short-Circuit Protection
• Rated Operational Voltage (Ue):
  • 690V AC 50/60Hz
• Network Type: AC
• Network Frequency: 50/60 Hz

Adjustments & Settings

• Long-Time Thermal Protection (Ir): Adjustable
• Adjustment Range: 0.7…1 x In
• Long-Time Delay (tr): Fixed
• Delay Settings:
  • 120…400 seconds at 1.5 x In
  • 15 seconds at 6 x Ir
• Instantaneous Magnetic Protection (Ii): Adjustable
• Instantaneous Setting Range: 5…10 x In
• Earth Leakage Protection: Not included

Build & Design

• Mounting Mode: Fixed
• Trip Unit Rating: 250A
• Compatibility:
  • ComPacT NSX250 Basic Frames

C253TM250 Physical Specifications

• Gross Weight: 450 g

Dimensions:

• Height: 7.0 cm
• Width: 10.0 cm
• Length: 11.5 cm

Environmental Specifications

• Standards: EN/IEC 60947-2
• Shock Protection Class: Class II
• Pollution Degree: 3 (IEC 60947-1)
• IP Degree of Protection: IP40 (IEC 60529)
• Ambient Temperature for Operation: -25°C to +70°C
• Ambient Temperature for Storage: -50°C to +85°C
• Carbon Footprint: 79 kg CO₂-eq (Total Life Cycle)
• Recycled Metal Content: 0%

Key Features & Benefits

✅ Thermal-Magnetic Protection: Ensures reliable overload and short-circuit protection.

✅ Adjustable Thermal Settings: Tailor protection to your system requirements with adjustable long-time pick-up.

✅ Adjustable Magnetic Protection: Instantaneous trip setting for flexibility and fast reaction to short-circuit events.

✅ Durable Design: Rated for harsh environments with a wide operating temperature range.

✅ Seamless Integration: Specifically designed for use with ComPacT NSX250 circuit breakers and EcoStruxure Power systems.

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