Miniature Current Switch No External Power Needed Self Powered Normally Open Amp Sensor Relay For AC 1 To 50A Detectable Includes Two Point Five Amps At 120V And 240V Universal Solid State Outputs For Fast Response And 1 Percent Accuracy

Single-Unit Self-Powered Mini Current Switch for 1-50A
✔️ Self-powered, NO output, 2.5A @120/240VAC, 1% accuracy

Compact, self-powered current switch designed to sense AC current from 1 to 50 A and trigger a normally open output. It operates without an external power source, making it ideal for control circuits, motor starters, and safety interlocks in tight spaces within automation panels and compact electronics.

✅ Sensing range: 1 to 50 A
✅ Outputs: NO contact, 2.5 A at 120 VAC / 240 VAC
✅ Self-powered: no external power supply required
✅ Fast response: ≤200 ms
✅ Accuracy: 1% across operating range
✅ 240V circuit note: only one 120V hot line connected

💡 What is a small self-powered current switch used for in automation and control?

Here's a handy, concise answer.

- It detects AC current in the 1-50 A range and closes NO contacts when the threshold is met.

- It is self-powered, requiring no external power source for simple installations.

- It provides fast response times (≤200 ms) for immediate signaling.

- Ideal for motor control, interlock circuits, and compact automation panels.