The Johnson Controls CSD-SA1E0-1 is a high-performance solid core current switch designed for reliable status monitoring of HVACR motors, fans, and pumps. This 100% solid-state device eliminates moving parts, providing contractors with a durable current sensing relay solution for commercial and industrial applications. It features an adjustable setpoint threshold from 1.00 to 135 Amperes, allowing for precise calibration via a multi-turn potentiometer to detect specific under current sensing conditions or proof of flow. Operating without the need for an external power supply, the unit is entirely self-powered through induction from the monitored conductor. The integrated Switch LED display provides immediate visual confirmation of the normally open status output, simplifying troubleshooting in the field. With a 600V AC isolation rating and a compact footprint, the CSD-SA1E0-1 fits easily into tight electrical enclosures. This industrial current sensor is rated for temperatures between 5 and 140?F and is UL listed, ensuring it meets rigorous safety standards for HVAC building automation systems. Key Benefits Adjustable Trip Point: Calibrate the 1.00 to 135A range to match specific motor load requirements using the multi-turn potentiometer. Self-Powered Operation: Reduces wiring complexity by inducing power directly from the monitored line. LED Status Indicators: High-visibility LEDs provide clear visual feedback on whether the setpoint has been reached. Solid-State Reliability: No mechanical contacts to wear out, ensuring consistent performance in high-cycle environments. Universal Mounting: Includes a snap-in mounting bracket for fast installation in any orientation. Common Questions How do I prevent "hunting" or rapid cycling during calibration? After the LED indicates the setpoint has been reached, turn the adjustment screw an additional 1/4 turn to create a deadband, preventing the switch from chattering due to minor current fluctuations. Can this switch handle multi-turn wiring for low-current applications? Yes, you can wrap the conductor through the 0.71-inch aperture multiple times to increase the sensed amperage, but you must derate the maximum current capacity accordingly (Max Current / Number of Turns). What is the maximum voltage the sensing hole can accommodate? The CSD-SA1E0-1 is designed with a 600V AC rms isolation voltage rating, suitable for standard commercial motor voltages. Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
