AC Constant Current Power Amplifiers

Constant current sources and amplifiers provide steady output current independent of the load and input power line with variations. Usage of these constant sources and amplifiers include generating magnetic fields, testing and qualifying products such as circuit breakers, relays, transformers, meters, etc. The “CR-A” series constant current mode power amplifiers are stable and easy-to-use power amplifiers designed with linear circuitry.

Their standard output ranges include 0 - 1 A, 0 - 2 A, 0 - 5 A, 0 - 10 A, 0 - 20 A, 0 - 25 A, 0 - 40 A, 0 - 50 A, 0 - 100 A. Custom output ranges (up to 1000 A) can be specified by customers. Constant current mode power amplifiers are also called transconductance power amplifiers. The frequency response of our transconductance amplifiers is from 47 Hz to 2K Hz. If a variable-frequency constant current source is needed, the combination of a function generator and one of our transconductance power amplifiers will be an ideal solution.

Please consult with the factory if higher output frequencies are needed. Our constant current power amplifiers and power sources can power up highly inductive loads with low distortion. We manufacture multi-channel constant current power amplifiers and constant current sources.

Constant Current Amplifiers Models

Model Number	Output Power	Frequency Response	Output Current	Dimensions	Weight	Data Sheets
AL-50-CR-L/A	50 W	47 Hz - 2K Hz	0 - 1 A rms. @ 50 V compliance volts, 0 - 5 A rms. @ 10 V compliance volts	5.25"H × 19"W × 16"D	30 lbs
AL-50-CR-H/A	50 W	47 Hz - 2K Hz	0 - 10 A rms. @ 5 V compliance volts, 0 - 25 A rms. @ 2 V compliance volts	5.25"H × 19"W × 16"D	30 lbs
AL-100-CR-L/A	100 W	47 Hz - 2K Hz	0 - 2 A rms. @ 50 V compliance volts, 0 - 10A rms. @ 10 V compliance volts	5.25"H × 19"W × 20"D	40 lbs
AL-100-CR-H/A	100 W	47 Hz - 2K Hz	0 - 20 A rms. @ 5 V compliance volts, 0 - 50 A rms. @ 2 V compliance volts	5.25"H × 19"W × 20"D	40 lbs
AL-200-CR-L/A	200 W	47 Hz - 1K Hz	0 - 2 A rms. @ 100 V compliance volts, 0 - 20A rms. @ 10 V compliance volts	5.25"H × 19"W × 20"D	55 lbs
AL-200-CR-H/A	200 W	47 Hz - 1K Hz	0 - 40 A rms. @ 5 V compliance volts, 0 - 100 A rms. @ 2 V compliance volts	5.25"H × 19"W × 20"D	55  lbs
AL-300-CR-L/A	300 W	47 Hz - 1K Hz	0 - 3 A rms. @ 100 V compliance volts, 0 - 30 A rms. @ 10 V compliance volts	5.25"H × 19"W × 20"D	65 lbs
AL-300-CR-H/A	300 W	47 Hz - 1K Hz	0 - 60 A rms. @ 5 V compliance volts, 0 - 150 A rms. @ 2 V compliance volts	5.25"H × 19"W × 20"D	65 lbs
AL-400-CR-L/A	400 W	47 Hz - 400 Hz	Specified by customer	7"H × 19"W × 23"D	85 lbs
AL-400-CR-H/A	400 W	47 Hz - 400 Hz	Specified by customer	7"H × 19"W × 23"D	85 lbs
AL-700-CR-L/A	700 W	47 Hz - 400 Hz	Specified by customer	7"H × 19"W × 23"D	125 lbs
AL-700-CR-H/A	700 W	47 Hz - 400 Hz	Specified by customer	7"H × 19"W × 23"D	125 lbs
AL-1000-CR-L/A	1000 W	47 Hz - 400 Hz	Specified by customer	7"H × 19"W × 23"D	150 lbs
AL-1000-CR-H/A	1000 W	47 Hz - 400 Hz	Specified by customer	7"H × 19"W × 23"D	150 lbs
AL-1200-CR-L/A	1200 W	47 Hz - 400 Hz	Specified by customer	7"H × 19"W × 23"D	165 lbs
AL-1200-CR-H/A	1200 W	47 Hz - 400 Hz	Specified by customer	7"H × 19"W × 23"D	165 lbs