![DC Power Supply 20 V, 5 A
(115 V, 50/60 Hz), 1003311 [U33020-115], Power Supplies](/imagelibrary/U33020-115/U33020-115_01_DC-Power-Supply-20-V-5-A-115-V-5060-Hz.jpg)
| Product Information: .. |
| Specifications: .. |
| Mains voltage: | 115 V ±10% (50/60 Hz) |
| DC output: | 0 – 20 V; 0 – 5 A |
| Output power: | 100 W |
| Stability under full load: | ≤0.01% + 5 mV |
| ≤0.2% + 5 mA | |
| Residual ripple: | ≤1 mV; 3 mA |
| Displays: | 2 x 3 digit LED |
| Terminals: | 4 mm safety sockets |
| Dimensions: | 130 mm x 150 mm x 300 mm approx. |
| Weight: | 4.7 kg approx. |
| Weight | 5.45 kg |
| Dimensions | 35 x 20 x 22 cm |
| Brand | 3B Scientific |
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for experiments with electron tubes of the D series, 1000644 [U191051], Electron Tubes D](/thumblibrary/U191051/U191051_01_140_140_Helmholtz-Coils-D-for-experiments-with-electron-tubes-of-the-D-series.jpg)
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(230 V, 50/60 Hz), 1003312 [U33020-230], Power Supplies](/thumblibrary/U33020-230/U33020-230_01_140_140_DC-Power-Supply-20-V-5-A-230-V-5060-Hz.jpg)
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![Experiment: Stefan-Boltzmann law (115 V, 50/60 Hz), 8000692 [UE4050200-115], Intensity of Radiation](/thumblibrary/UE4050200-115/UE4050200-115_01_140_140_Experiment-Stefan-Boltzmann-law-115-V-5060-Hz.jpg)
![Experiment: Electric Balance (115 V, 50/60 Hz), 8000762 [UE3030350-115], Magnetic fields](/thumblibrary/UE3030350-115/UE3030350-115_01_140_140_Experiment-Electric-Balance-115-V-5060-Hz.jpg)
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![Experiment: Lorentz Force (115 V, 50/60 Hz), 8000620 [UE3030300-115], Magnetic fields](/thumblibrary/UE3030300-115/UE3030300-115_01_140_140_Experiment-Lorentz-Force-115-V-5060-Hz.jpg)
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![Experiment: Pohl’s Torsion Pendulum (115 V, 50/60 Hz), 8000558 [UE1050500-115], Oscillations](/thumblibrary/UE1050500-115/UE1050500-115_01_140_140_Experiment-Pohl-s-Torsion-Pendulum-115-V-5060-Hz.jpg)
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![Experiment: Perrin tube (115 V, 50/60 Hz), 8000663 [UE3070400-115], Electron tubes](/thumblibrary/UE3070400-115/UE3070400-115_01_140_140_Experiment-Perrin-tube-115-V-5060-Hz.jpg)
![Experiment: Waltenhofen’s Pendulum (115 V, 50/60 Hz), 8000631 [UE3040400-115], Induction](/thumblibrary/UE3040400-115/UE3040400-115_01_140_140_Experiment-Waltenhofen-s-Pendulum-115-V-5060-Hz.jpg)
![Experiment: Dielectrics in plate capacitors (115 V, 50/60 Hz), 8000785 [UE3010850-115], Electrostatics](/thumblibrary/UE3010850-115/UE3010850-115_01_140_140_Experiment-Dielectrics-in-plate-capacitors-115-V-5060-Hz.jpg)
![Experiment: Internal energy and electrical work (115 V, 50/60 Hz), 8000587 [UE2030400-115], Internal Energy](/thumblibrary/UE2030400-115/UE2030400-115_01_140_140_Experiment-Internal-energy-and-electrical-work-115-V-5060-Hz.jpg)
![Experiment: Voltage Dividers (115 V, 50/60 Hz), 8000616 [UE3020340-115], Charge transport and current](/thumblibrary/UE3020340-115/UE3020340-115_01_140_140_Experiment-Voltage-Dividers-115-V-5060-Hz.jpg)
![Experiment: Photoconductivity (115 V, 50/60 Hz), 8000775 [UE6020400-115], Conduction Phenomena](/thumblibrary/UE6020400-115/UE6020400-115_01_140_140_Experiment-Photoconductivity-115-V-5060-Hz.jpg)
![Experiment: Speed of sound in air (115 V, 50/60 Hz), 8000566 [UE1070310-115], Acoustics](/thumblibrary/UE1070310-115/UE1070310-115_01_140_140_Experiment-Speed-of-sound-in-air-115-V-5060-Hz.jpg)
![Experiment: Kirchhoff’s Laws (115 V, 50/60 Hz), 8000614 [UE3020330-115], Charge transport and current](/thumblibrary/UE3020330-115/UE3020330-115_01_140_140_Experiment-Kirchhoff-s-Laws-115-V-5060-Hz.jpg)
![High Voltage Power Supply 5 kV (115 V, 50/60 Hz), 1003309 [U33010-115], Power Supplies](/thumblibrary/U33010-115/U33010-115_01_140_140_High-Voltage-Power-Supply-5-kV-115-V-5060-Hz.jpg)
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![Set of 15 Safety Experiment Leads, 75 cm, 2.5 mm², 1002843 [U138021], Circuits](/thumblibrary/U138021/U138021_01_140_140_Set-of-15-Safety-Experiment-Leads-75-cm-25-mm.jpg)
![Set of Experiment Leads for Electron Tube Experiments, 1002847 [U138101], Experiment Leads and Cables](/thumblibrary/U138101/U138101_01_140_140_Set-of-Experiment-Leads-for-Electron-Tube-Experiments.jpg)
![Projection Screen, 1000608 [U17130], Optical Components on Stem](/thumblibrary/U17130/U17130_01_140_140_Projection-Screen.jpg)
![Tube Holder D -
for the experimental setup of tubes of series D, 1008507 [U191001], Electron Tubes D](/thumblibrary/U191001/U191001_01_140_140_Tube-Holder-D-for-the-experimental-setup-of-tubes-of-series-D.jpg)
![Deflection Tube D, 1000651 [U19155], Electron Tubes D](/thumblibrary/U19155/U19155_01_140_140_Deflection-Tube-D.jpg)
![High Voltage Power Supply 5 kV (230 V, 50/60 Hz), 1003310 [U33010-230], Power Supplies](/thumblibrary/U33010-230/U33010-230_01_140_140_High-Voltage-Power-Supply-5-kV-230-V-5060-Hz.jpg)
![Water Wave Channel, 1000807 [U8431411], Water Waves](/thumblibrary/U8431411/U8431411_01_140_140_Water-Wave-Channel.jpg)
![Optical rider D , 90/50, 1002635 [U103111], Optics with an Optical Bench](/thumblibrary/U103111/U103111_01_140_140_Optical-rider-D-9050.jpg)
![DC Galvanometer, 1002790 [U11814], Hand-held Analog Measuring Instruments](/thumblibrary/U11814/U11814_01_140_140_DC-Galvanometer.jpg)
![Rotating Object Holder on Stem, 1003016 [U17001], Optical Components on Stem](/thumblibrary/U17001/U17001_01_140_140_Rotating-Object-Holder-on-Stem.jpg)
![Rail Supports, Pair, 1003044 [U171661], Optics with an Optical Bench](/thumblibrary/U171661/U171661_01_140_140_Rail-Supports-Pair.jpg)
![Tube Holder S -
for the experimental setup of tubes of series S, 1014525 [U185002], Electron Tubes S](/thumblibrary/U185002/U185002_01_140_140_Tube-Holder-S-for-the-experimental-setup-of-tubes-of-series-S.jpg)
![Thomson Tube S, 1000617 [U18555], Electron Tubes S](/thumblibrary/U18555/U18555_01_140_140_Thomson-Tube-S.jpg)
![Red Laser Diode, 650 nm, 1003201 [U22000], Optical Lamps on Stem](/thumblibrary/U22000/U22000_01_140_140_Red-Laser-Diode-650-nm.jpg)
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![Liquid Levels, 1003509 [U58020], Pressure](/thumblibrary/U58020/U58020_01_140_140_Liquid-Levels.jpg)
![Friction Measuring Apparatus -
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