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N3305A

Keysight Technologies (Agilent HP)Electronic Loads

The Keysight N3305A is a 500-watt DC electronic load module designed for use with the N3300A or N3301A mainframes. Operating with high accuracy and speed, it supports constant current, constant voltage, and constant resistance modes, making it ideal for testing power supplies, batteries, and power components. Occupying two slots in the mainframe, it handles up to 150 V and up to 60 A.

Battery TestingElectronic LoadPower ElectronicsPower Supply Testing

Specifications

General

ParameterValue
InterfacesGPIB, RS-232, 14-pin analog port (via N3300A/N3301A mainframe and rear connector)
DisplayNone (status indicators only; uses mainframe front panel display)
Maximum Input Isolation Voltage150 VDC (input to chassis ground)

Physical

ParameterValue
Power SupplyPowered by N3300A/N3301A mainframe backplane
Operating Temperature0 to 55 °C
Dimensions (W×H×D)115.5 mm x 172 mm x 461 mm
Mainframe Slot Occupancy2 slots

Input Ratings

ParameterValue
Maximum Input Power500 W
Maximum Input Current60 A
Maximum Input Voltage150 V
Minimum Operating Voltage at Full Scale Current1.2 V @ 60 A

Operating Ranges

ParameterValue
Constant Current Low Range0 to 6 A
Constant Current High Range0 to 60 A
Constant Voltage Low Range0 to 15 V
Constant Voltage High Range0 to 150 V

Programming Accuracy

ParameterValue
Constant Current Programming Accuracy (Low Range)±(0.1% + 7.5 mA)
Constant Current Programming Accuracy (High Range)±(0.1% + 15 mA)
Constant Voltage Programming Accuracy (Low Range)±(0.05% + 10 mV)
Constant Voltage Programming Accuracy (High Range)±(0.05% + 40 mV)

Programming Resolution

ParameterValue
Constant Current Programming Resolution (Low Range)1.5 mA
Constant Current Programming Resolution (High Range)15 mA
Constant Voltage Programming Resolution (Low Range)3.75 mV
Constant Voltage Programming Resolution (High Range)37.5 mV

Readback Accuracy

ParameterValue
Current Readback Accuracy (Low Range)±(0.08% + 6.5 mA)
Current Readback Accuracy (High Range)±(0.08% + 15 mA)
Voltage Readback Accuracy (Low Range)±(0.05% + 10 mV)
Voltage Readback Accuracy (High Range)±(0.05% + 35 mV)

Readback Resolution

ParameterValue
Current Readback Resolution (Low Range)0.18 mA
Current Readback Resolution (High Range)1.8 mA
Voltage Readback Resolution (Low Range)0.45 mV
Voltage Readback Resolution (High Range)4.5 mV

Transient & Dynamic

ParameterValue
Transient Frequency Range0.25 Hz to 10 kHz
Transient Duty Cycle Range3% to 97% (resolution 1%)

Environmental

ParameterValue
Storage Temperature Range-40 to 75 °C

Constant Resistance

ParameterValue
Constant Resistance Range 10.083 Ω to 2 Ω
Constant Resistance Range 21.5 Ω to 200 Ω
Constant Resistance Range 3150 Ω to 10,000 Ω

Ripple and Noise

ParameterValue
Current Ripple and Noise (rms)6 mA
Current Ripple and Noise (peak-to-peak)60 mA

Transient Slew Rate

ParameterValue
Constant Current Slew Rate (Low Range)2.6 mA/µs to 260 mA/µs
Constant Current Slew Rate (High Range)26 mA/µs to 2.6 A/µs
Constant Current Slew Rate Programming Resolution (Low Range)1.05 mA/µs
Constant Current Slew Rate Programming Resolution (High Range)10.5 mA/µs

Analog Monitoring

ParameterValue
Analog Current Monitor Output Range0 to 10 V
Analog Voltage Monitor Output Range0 to 10 V
Analog Current Monitor Accuracy±(1.5% of full scale + 10 mV)
Analog Voltage Monitor Accuracy±(1% of full scale + 10 mV)

Sensing

ParameterValue
Maximum Voltage Drop per Load Lead2 V

Constant Resistance Mode

ParameterValue
Constant Resistance Range 1 Programming Accuracy±(1% + 8 mS) with ≥ 6 A input
Constant Resistance Range 2 Programming Accuracy±(1% + 120 µS) with ≥ 0.6 A input
Constant Resistance Range 3 Programming Accuracy±(1% + 15 µS) with ≥ 0.06 A input

Protection

ParameterValue
Overvoltage Protection Threshold170 V (nominal)
Overcurrent Protection Threshold (Low Range)6.5 A (nominal)
Overcurrent Protection Threshold (High Range)65 A (nominal)
Overpower Protection Threshold520 W (nominal)
Overtemperature ProtectionYes
Maximum Reverse Current (Diode Clamp)60 A

Input Characteristics

ParameterValue
Input Resistance (With Input Off)20 kΩ (typical)

Temperature Coefficient

ParameterValue
Voltage Temperature Coefficient0.005% + 1.5 mV per °C
Current Temperature Coefficient (Low Range)0.01% + 0.12 mA per °C
Current Temperature Coefficient (High Range)0.01% + 1.2 mA per °C

Stability

ParameterValue
Voltage 8-Hour Drift0.012% + 1.5 mV
Current 8-Hour Drift (Low Range)0.03% + 1 mA
Current 8-Hour Drift (High Range)0.03% + 10 mA

Compliance & Certifications

ParameterValue
Safety Compliance StandardsIEC 61010-1, EN 61010-1, CSA C22.2 No. 1010.1, UL 3111-1
EMC Compliance StandardsEN 55011, CISPR 11 (Group 1, Class A), EN 50082-1

Maintenance

ParameterValue
Recommended Calibration Interval12 months

Technology

DC Electronic Load

Applications

Power supply testing, battery testing, power component evaluation