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Schneider Electric C65H-DCC10A Miniature Circuit Breaker

Configured for DC overcurrent interruption in low-voltage distribution circuits, the Schneider Electric C65H-DC (C65-DC Miniature Circuit Breaker) provides direct physical/electrical execution of fault current interruption in single-pole DC protection paths. The device operates as a thermomagnetic breaker with C curve tripping characteristics for defined inrush current tolerance and short-circuit disconnection behavior in 125 VDC networks.

Hardware Specifications 

Parameter	Specification
ModelBrand	Schneider Electric C65H-DC
Origin	Not specified
Weight	110 g
Dimensions	18 mm (W) x 84 mm (H) x 71.5 mm (D)
OperatingTemp	-30 degC to 70 degC
PowerConsumption	Not applicable (passive electromechanical device)
Rated Current (In)	10 A at 40 degC
Poles	1P
Network Type	DC
Breaking Capacity (Icu)	10 kA at 125 VDC
Service Breaking Capacity (Ics)	7.5 kA (75 percent of Icu)
Tripping Curve	C curve
Magnetic Trip Range	8.5 x In +/- 20 percent
Electrical Life	10000 operations
Mechanical Life	20000 operations
Insulation Voltage (Uimp)	5 kV

Schneider Electric Multi9 Rail Modular Protection Behavior

The Schneider Electric C65H-DC integrates within Multi9 rail-mounted protection architectures, where DIN-rail mechanical stability and modular pole expansion define physical installation constraints. In Schneider Electric protection systems, device-level coordination is influenced by upstream and downstream impedance shaping and backplane distribution continuity, where deterministic fault isolation depends on thermal-magnetic response curves and controlled arc extinction behavior in DC environments. The C curve magnetic characteristic defines the instantaneous trip threshold window for inductive loads with moderate inrush profiles, ensuring coordination stability in segmented DC distribution chains.

Frequently Asked Questions

Q: Can the C65H-DC be hot-swapped under energized DC conditions?
A: No. The device is not designed for hot-swap operation. Mechanical isolation of the circuit is required prior to DIN-rail removal to prevent DC arc formation.

Q: What determines the 10 kA Icu rating limitation?
A: The Icu value is defined by IEC 60947-2 test conditions at 125 VDC, representing the maximum prospective short-circuit current the breaker can interrupt without catastrophic failure.

Q: Does the C curve affect DC trip coordination stability?
A: Yes. The C curve defines magnetic trip onset at 8.5 x In, influencing coordination with upstream protection devices under transient inrush conditions.

Field Installation Guidelines

The device shall be installed on standard 35 mm DIN rail with secure mechanical locking engagement. Conductors must be terminated using tunnel-type terminals within 1 to 25 mm2 cross-sectional range, ensuring torque tightening at 2.5 N·m. For DC applications, polarity consistency must be maintained across distribution rails to avoid reverse polarity stress on arc interruption chambers. Cable routing should minimize loop inductance to reduce electromagnetic stress during fault interruption events.

Installations must maintain separation between load and supply wiring to reduce coupling effects during magnetic trip events. Shielding is not required for power conductors but recommended for adjacent signal cabling in mixed-control panels.

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