2 - General Information 
20 
Safety Considerations 
This electronic load is a Safety Class 1 instrument, which means it has a protective earth terminal.  That terminal 
must be connected to earth ground through power source equipped with a ground receptacle.  Refer to the Safety 
Summary page at the beginning of this guide for general safety information.  Before installation or operation, 
check the electronic load and review this guide for safety warnings and instructions.  Safety warnings for 
specific procedures are located at appropriate places in the Guide. 
Options and Accessories 
Table 2-1 Options 
800  One rack mount kit for two N3301A half-rack units side by side*. 
Consists of: Lock-link kit (p/n 5061-9694) and Flange kit (p/n 5062-3978) 
908  One rack mount kit*. 
Consists of: Flange kit for N3300A (order 2 p/n 5062-3974) 
         Flange kit for one N3301A with blank filler panel (p/n 5062-3960) 
One rack mount kit with handles for N3300A* (order 2 p/n 5062-3975). 
8mm input screw terminal connectors (see chapter 3) 
*Support rails (p/n E3663AC) are required. 
Table 2-2  Accessories 
  1.0 meter (3.3 ft) 
  2.0 meters (6.6 ft) 
  4.0 meters (13.2 ft) 
  10833A 
  10833B 
  10833C 
  (9-pin F to 9-pin F, 2.5 meter, null modem/printer cable with one 
  9-pin M to 25 pin F adapter) 
RS-232 adapter kit (contains 4 adapters) 
  9-pin M to 25-pin M for pc or printer 
  9-pin M to 25-pin M for pc or printer  
  9-pin M to 25-pin M for modem 
  9-pin M to 9-pin M for modem 
Description 
The N3300A is a DC Electronic Load Mainframe used for design, manufacturing, and evaluation of dc power 
supplies, batteries, and power components. Other applications include use as a power circuit breaker or crowbar, 
high current function or pulse generator, fuel-cell and photovoltaic cell test, and de-energizing superconducting 
magnets. 
The mainframe contains six slots for load modules.  Load modules occupy either 1 or 2 slots depending on the 
power rating of the module.  The mainframe can dissipate up to 300 watts per slot, to a total of 1800 watts for a 
fully loaded mainframe. Each individual module has its own channel number and contains its own input 
connector.  The mainframe contains a processor, GPIB connector, RS-232 connector and interface circuits, 
trigger circuits, front-panel keypad and display, and other circuits common to all the load modules.