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EL-R Series DC Supplies: Technical Specifications

Precision with Simplicity

  • Linear regulated with low ripple and noise
  • Single, dual and triple output models
  • Constant voltage or constant current
  • 4 digit meters with 10mV and 1mA resolution
  • Switchable remote sense terminals for perfect regulation at the load
  • Silent fan-free cooling
  • DC output switch enables voltage/current setup without the load connected
  • Safety terminals accept fixed shroud 4mm plugs plus forks and wires
  • EL302RT (triple) has auxiliary output of 1.5V to 5V at 2A


Voltage/Current Ranges
EL301R0 to >30V; 0 to >1A (30W nominal power)
EL183R0 to >18V; 0 to >3.3A (60W nominal power)
EL302R0 to >30V; 0 to >2A (60W nominal power)
EL561R0 to >56V; 0 to >1.1A (60W nominal power)
EL155R0 to >15V; 0 to >5A (75W nominal power)
EL303R0 to >30V; 0 to >3A (90W nominal power)
EL302RD2 x (0 to >30V; 0 to >2A) (120W nominal power)
EL302RT2 x (0 to >30V; 0 to >2A) plus 1.5 to 5.0V @ 2A (130W nominal power)
Output Setting & Control
Voltage SettingBy coarse and fine controls.
Current SettingBy single logarithmic control
Output ModeConstant voltage or constant current with automatic cross-over. CC indicator in constant current mode.
Output SwitchElectronic, non isolating. Preset voltage and current limit displayed when Output off.
Output Performance
Ripple & NoiseTypically <1mV rms, (CV mode, 20MHz bandwidth).
Load Regulation<0.01% of maximum output for a 90% load change (using remote sense)
Line Regulation<0.01% of maximum output for 10% line change
Transient Response: <50us to within 50mV of setting for a 5% to 95% load change
Temp. Coefficient (Voltage)typically <100ppm/°C
Output Protection
Output ProtectionOutput will withstand forward voltages of up to 20V above rated output voltage. Reverse protection by diode clamp for currents to 3A.
Output Connections
Output TerminalsUniversal 4mm safety binding posts on 19mm (0.75") spacing. Terminals can accept fixed shroud 4mm plugs, standard 4mm plugs, fork terminals and bare wires.
Remote Sense
Sense SelectionVoltage sensing is selected as Local or Remote by front panel switch
Sense TerminalsSprung loaded screw-less terminals

Display TypeDual 4-digit meters, 14mm (0.56") LED
Voltage Meter
Accuracy0.3% of reading +/- 3 digits
Current Meter
Accuracy0.5% of reading +/- 3 digits

VoltageVariable <1.5V to >5V by front panel control
Meter accuracy0.3% +/- 4 digits
Current limit2A minimum
Load regulation<3% for 90% load change
Line regulation<0.2% for 10% line voltage change
Ripple & NoiseTypically <5mV rms, <15mV pk-pk (20MHz bandwidth)
Output ProtectionOutput will withstand up to 7V forward voltage. Diode clamp reverse protection for currents up to 3A.
Output TerminalsUniversal 4mm safety binding posts on 19mm (0.75") spacing
Status IndicationUNREG lamp

AC Input230V AC or 115V AC +/- 10%, 50/60Hz. Installation Category II
VA Ratings:
EL301R85 VA
EL302R, EL302P, EL183R, EL561R160VA
EL155R, EL303R250VA
EL302RD, EL302RT320VA
Temperature & Environmental
Operating Range+5°C to +40°C, 20% to 80% RH
Storage Range-40°C to + 70°C
EnvironmentalIndoor use at altitudes up to 2000m, Pollution Degree 2
CoolingSilent fan-less convection cooling
Safety & EMC
SafetyComplies with EN61010-1
EMCComplies with EN61326

Single output models140x160x295 mm (WxHxD)
Dual and triple output models260x160x295 mm (WxHxD)
EL302R, EL302P, EL183R, EL561R4.4kg
EL155R, EL303R5.0kg
EL302RD, EL302RT7.5kg