The RBL and RBL488 series are single-channel DC electronic loads — TDI's Dynaload line — built to sink and dissipate power from a device under test. The series is positioned for testing large batteries, power supplies, fuel cells, and other related DC power equipment, pairing high-range current capability with a constant-power feature in a single unit.

The high-range current capability and constant-power feature facilitate battery testing and analysis, while the ultra-fast slew rate provides power-supply transient testing. The ultra-low-voltage, high-current capability makes the series suited to fuel-cell testing, where the load must operate at a fraction of a volt while drawing substantial current.

ValueTronics maintains its own 20,000-square-foot secure warehouse at 1675 Cambridge Drive in Elgin, Illinois, where it stocks and holds its own inventory. Every pre-owned unit is inspected and functionally verified in-house before it ships, while new units leave the warehouse factory-sealed exactly as received.

Compare Other Models in This Series

The RBL and RBL488 series are single-channel DC electronic loads offered in 800-watt, 2000-watt, and 4000-watt chassis, with series ratings reaching 0–1000 V, 0–1000 A, and up to 4000 W in a single unit. All five operating modes — constant current, constant resistance, constant voltage, constant power, and pulse — are common across the series.

The RBL designation denotes analog front-panel control, while the RBL488 designation adds IEEE-488 digital control; both share the same loading architecture, master/slave paralleling, internal pulse generator, and short-circuit capability.

Each model below is its own dedicated product page with condition-matched pricing for pre-owned inventory. Select the model whose full-scale voltage, current, and power ranges match your test setup, and review that page for its specific configuration.

Models in the series differ primarily in their full-scale voltage and current ranges and in chassis wattage. Among the 2000-watt configurations, for example, the available voltage range sets vary (such as 10/50/100 V, 20/200/400 V, or 20/200/600 V) and are paired with current ranges that differ by model, as shown in the comparison table.

The choice between RBL and RBL488 reflects the control method — analog front-panel versus IEEE-488 digital. Match the model's rated maximum voltage, current, and power to the source under test using the per-model ranges in the table that follows.

Additional differences in specifications beyond the few shown above are not listed here — see each model's full specifications below.

Product Core & Specifications

Important: When selecting a model, do not choose one rated for a given maximum voltage to test a source at that same voltage; a transient overshoot in current limit, power limit, or overvoltage could result in nuisance trip-outs or clipping of current peaks. The same applies to current and power ratings.

Important: Where applicable, stated accuracies are with respect to an externally programmed reference. Meters may be used together with calibration data for increased accuracy.

Important: Practical upper limits of pulse frequency and maximum slew rate are highly dependent on operating mode, source characteristics, and source to Dynaload wiring.

Important: For 1000 Volt ratings, refer to the separate RBL 1000V datasheet.

About this Pre-Owned unit

This pre-owned unit is inspected and functionally verified in-house before it ships and is backed by our pre-owned warranty. To confirm its exact condition, firmware revision, installed options, or included accessories for your application before ordering, contact our Test Architects.

• Warranty included
• Functional verification included
• Standard Calibration Upgrade Options: No Calibration Required, NIST Traceable, Z540.1 or ISO 17025 with Data, Z540.3 Guardbanding with Data.
• Note that unnecessary accessories may not be included (contact Test Architect to confirm).

ValueTronics supplies both new and used test and measurement equipment. New units ship factory-sealed, exactly as received from the manufacturer; every used unit is inspected and functionally verified in-house at our 20,000 sq ft secure facility in Elgin, Illinois before it ships. Our Test Architects can help you select the condition, calibration, and configuration that fit your application.

Please review the Manufacturer's Data Sheet to verify published specifications. Feedback on this webpage is always welcome — please reach out to your Test Architect at any time for questions or concerns. Thank you, we truly appreciate you being our customer.