OWON OEL85 Series
Precision programmable DC loads in a compact half-rack format: 150, 300 or 600 V inputs at 200–500 W, with CC/CV/CR/CP modes, 5 kHz dynamic testing and SCPI remote control. From €255.
One load family for power-supply, battery and converter test
The OWON OEL85 series (also known as the OEL8500 series) is a family of seven single-channel programmable DC electronic loads. All share the same compact half-rack 2U chassis with a 3.9-inch TFT display — you simply choose the input ratings: 150, 300 or 600 V, 20 or 40 A, and 200, 400 or 500 W of continuous power.
Every model sinks current in four static modes — CC, CV, CR and CP — and adds a CC dynamic mode up to 5 kHz with programmable rise/fall slope for transient-response testing. Readback resolution of 1 mV / 0.1 mA, full protection (OVP, OCP, OPP, OTP and reverse voltage) and SCPI remote control over RS232 and USB make it equally at home on an R&D bench or in an automated production test rack.
Why the OEL85
Four static modes, fast dynamic testing and remote control — a complete DC load in half a rack width.
CC / CV / CR / CP + dynamic
Four static operating modes with a 0.05 Ω–7.5 kΩ resistance range, plus a CC dynamic mode to 5 kHz (T1/T2 from 0.1 ms to 50 s) for load-transient testing of supplies and converters.
Programmable slope
Current rise/fall slope adjustable from 0.01 A/ms to 2000 A/ms with a minimum rise time of 20 µs — shape the exact current step your device under test must survive.
Precision readback & protection
1 mV / 0.1 mA / 10 mW readback on the 3.9-inch TFT, with over-voltage, over-current, over-power, over-temperature and reverse-voltage protection plus short-circuit simulation.
SCPI remote & parallel to 4 kW
RS232 and USB device interfaces with the SCPI protocol for automated test; RS485 links up to 10 units in parallel (except CV mode) for as much as 4 kW of load power.
Who it’s for & best applications
A DC electronic load is the missing half of every power test bench: it draws a precisely controlled current so you can characterise whatever supplies it.
- Power-supply and adapter design & validation
- Battery, charger and energy-storage testing
- DC–DC converter and solar-cell characterisation
- Production lines and automated test (SCPI)
- Education labs — compact, protected, affordable
- Transient-response testing with the 5 kHz dynamic mode
- Battery discharge curves, OCP and OPP verification with the optional OEL-T1 test pack
- Burn-in and endurance testing at constant power
- High-voltage strings: 600 V models for PV and telecom rails
- Multi-unit parallel racks up to 4 kW over RS485
Choose your model
Seven models, one platform. Pick the voltage your application needs — 150 V, 300 V (“B”) or 600 V (“C”) — then the current and power: 20 A/200 W (OEL8511), 40 A/400 W (OEL8512) or 40 A/500 W (OEL8513). Click any model to view its full details and buy.
OEL8511
OEL8511B
OEL8511C
OEL8512
OEL8512B
OEL8512C
OEL8513
OEL85110–150 V0–20 A200 W
0.8 V @ 20 A
€255
OEL8511B0–300 V0–20 A200 W
0.8 V @ 20 A
€305
OEL8511C0–600 V0–20 A200 W
0.8 V @ 20 A
€355
OEL85120–150 V0–40 A400 W
1.1 V @ 40 A
€330
OEL8512B0–300 V0–40 A400 W
1.1 V @ 40 A
€390
OEL8512C0–600 V0–40 A400 W
1.1 V @ 40 A
€450
OEL85130–150 V0–40 A500 W
1.1 V @ 40 A
€359
Options for every model
Each OEL85 can be extended with factory options and accessories — contact us to add them to your order.
OEL-T1 test pack
Unlocks the battery-discharge test (capacity curves with cut-off conditions) plus automated OCP and OPP test routines — order no. OEL-T1.
Parallel module & RS232 cable
The parallel module links up to 10 units over RS485 for a combined 4 kW load system; the RS232 com cable connects a PC for SCPI remote control.
Handle & 20 A test leads
A carry/rack handle for the half-rack chassis and heavy-duty 20 A test leads for low-resistance connections to the device under test.
Specifications
Shared across the OEL85 series; voltage, current and power ratings depend on the model — see the comparison above.
| Load & measurement | |
| Static modes | CC, CV, CR, CP |
| CV range / resolution | 0–150 / 300 / 600 V (model) · 1 mV |
| CC range / resolution | 0–20 A or 0–40 A (model) · 1 mA |
| CR range | 0.05 Ω – 7.5 kΩ |
| CP range / resolution | to 200 / 400 / 500 W (model) · 10 mW |
| Dynamic mode (CC) | up to 5 kHz · T1 & T2 0.1 ms – 50 s |
| Rise/fall slope | 0.01 A/ms – 2000 A/ms · min. rise time 20 µs |
| Readback | V 1 mV · A 0.1 mA · W 10 mW |
| Minimum operate voltage | 0.8 V @ 20 A (OEL8511) · 1.1 V @ 40 A (OEL8512/13) |
| Short-circuit simulation | CC, CV and CR modes |
| General | |
| Protection | Over-voltage, over-current, over-power, over-temperature, reverse voltage |
| Interfaces | RS232 + USB device · SCPI protocol |
| Parallel operation | up to 10 units via RS485 (except CV mode) · max. 4 kW total |
| Optional functions | Battery discharge test, OCP test, OPP test (order no. OEL-T1) |
| Display | 3.9-inch TFT LCD |
| Withstand voltage | 500 V DC, 1 mA (output–ground) · 1.5 kV AC, 5 mA (input–ground) |
| Safety | European EMC directive, Class A test & measurement |
| Form factor | 1/2 rack width, 2U · standard rack-mount size |
| Dimensions (W×H×D) | 215 × 88 × 375 mm |
| Weight | ≈ 4.2 kg (OEL8511) · ≈ 5 kg (OEL8512/13) |
From the official OWON OEL85 series datasheet; subject to change, errors & omissions excepted.
In the box
Every OEL85 ships with a power cord, spare fuse and user manual. The handle, RS232 com cable, parallel module and 20 A test leads are optional extras.
PC software and documentation are free downloads below. Box contents subject to final delivery.
Related ranges
Pair your load with a programmable supply, or compare OWON’s value load series.
Value range: OEL15 / 30 / 60
Cost-effective 150–300 W bench loads in 150, 300 and 600 V variants — nine models for education and general bench testing.
View
DC power supplies
The other half of the bench: OWON linear and programmable switching supplies from compact single-channel units to 3 kW systems.
View
Probes & accessories
Current probes, differential probes and test leads for power-electronics measurements are in our accessories store.
ViewNot sure which OEL85 is right for you?
Tell us the voltage, current and power of what you need to test — we’ll help you pick the right model and options, from a single bench load to a 4 kW parallel rack.
Downloads
Official OWON documentation and Windows PC software for the OEL85 series.
Files are hosted on the OWON server and open in a new tab. Also available: the full OEL85 factory product page.