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LOCC Box DC Electronic fuse for 24V dc circuits, NEC Class 2

  • NEC Class 2 Compliant
  • For tripping 24 V DC circuits
  • Adjustable between 0.5-4 A
  • 3 selectable trip characteristics

Product description

LÜTZE LOCC-Box module was specially developed for load circuits in compliance with NEC Class 2. The UL-defined circuits are limited to 100 VA and, thanks to the energy limit, are protected against electrical shocks or fire. As a Class 2 load current monitoring system, it is now possible to supply standard switching power supply units. In addition, components that are not UL-approved can also be used in the load circuit. In contrast to other Class 2 load monitoring systems, LÜTZE's LOCC Box has configurable characteristics and current ranges.

There are 3 characteristics (fast, medium and slow_1) available for the new Class 2 module. These current ranges can be set with a rotary knob from 0.5 A to 4 A in 0.5 A steps.

Green and red LEDs in the LED status display indicate operating voltage and errors in the load circuit. In addition to current limitation in compliance with NEC-Class 2, the DC 24 V / 100 VA load monitoring also satisfies the standards EN 60950-1, EN 61131-1,2, EN 61000, EN 60947-4-1 and EN 55022.


Parts Price


Photo of 716400

LOCC-Box-C2 Electronic fuse, Class 2, 12-24V, 0.5-4A

Technical data

Adjustable current max 4 A
Adjustable current min 0,5 A
Adjustable steps 0,5 A
Approvals CE, cULus, GL
Capacitance max 4700 µF
Connection type Spring 0.25-2.5mm²
Cross section max 2,5 mm²
Cross section min 0,25 mm²
Depth 116 mm
EMC EN61000-6-2, EN61000-6-3
Height 114,5 mm
Input current max 4 A
IP class IP20
Memory at power failure Yes, status retained when voltage is back on
Mounting DIN-rail
Operating voltage dc max 30 V
Operating voltage dc min 10 V
Output current max 4 A
Output semiconductors Mosfet
Power through distribution beam max 40 A
Reaction time 800 ms
Selectable current ranges 0.5-4A, adjustable in 0.5A steps
Status indication LED. Steady green - OK, flashing green - load over 90%, flashing red - fuse triggered, steady red - fuse off
Temperature operational max 50 °C
Temperature operational min -25 °C
Weight 120 g
Width 8,1 mm
Voltage drop over semiconductor 170 mV


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