AC Current Sensing Switch M3060/M3066 0.2–50A Relay Sensor
AC Current Sensing Switch M3060/M3066 0.2–50A Relay Sensor
AC Current Sensing Switch M3060 / M3066 — Adjustable 0.2–50A Current Transformer Relay Sensor
Monitor and control AC current loads with precision using the M3060 (Normally Open) / M3066 (Normally Closed) AC Current Sensing Switch. Designed for industrial and smart-home applications, this self-powered, non-contact relay sensor detects current flow through cables and outputs a dry contact signal — no external power supply required. Compatible with PLCs, machinery, pipe equipment, assembly lines, and more. Made in Mainland China.
Key Features
- Self-Powered Operation: Draws energy inductively from the monitored cable — zero need for an external power supply.
- Wide Adjustable Range: Continuously adjustable threshold from 0.2 A to 50 A to match virtually any load monitoring scenario.
- Non-Contact Sensing: Mutual inductive current acquisition ensures full electrical isolation between input and output, enabling safe, reliable operation even in strong magnetic field environments.
- Dry Contact Output (NO / NC): Choose M3060 for Normally Open or M3066 for Normally Closed output — ideal for direct PLC integration.
- Virtually Unlimited Switching Cycles: Electronic relay design provides fast response with no mechanical wear limit.
- Broad Compatibility: Works with mechanical equipment, smart home devices, environmental protection systems, conveyor/feeding lines, pipe monitoring systems, and more.
Technical Specifications
| Models | M3060 (Normally Open, NO) / M3066 (Normally Closed, NC) |
| Sensing Range | AC 0.2 – 50 A (continuously adjustable) |
| Contact Capacity | AC/DC 0.3 A @ 240 V |
| Punched Cable Diameter | 10 mm |
| Maximum Leakage Current | 0.1 A |
| Maximum Overload Capacity | 100% |
| Operating Temperature | -20 °C to +60 °C |
| Hysteresis Value | < 1% |
| Voltage Classification | Low Voltage — Below 50 V AC or 75 V DC |
| High-Concern Chemicals | None |
| Country of Origin | Made in Mainland China |
Common Applications
- PLC input signal generation for load monitoring
- Pump, motor, and conveyor run/stop detection
- Smart home automation current sensing
- Environmental protection and HVAC equipment monitoring
- Pipe and assembly-line equipment control
Package Includes
- 1 × AC Current Sensing Switch (choose M3060 NO or M3066 NC)
Note: Colors may vary slightly due to monitor settings. Please allow ±1 mm measurement tolerance due to manual measurement methods.
For guidance on safe electrical installation practices, refer to OSHA Electrical Safety Standards.
Frequently Asked Questions
Q: What is the difference between the M3060 and M3066 AC current sensing switch models?
A: The M3060 is a Normally Open (NO) relay switch — its output circuit is open when no current is detected and closes when current exceeds the set threshold. The M3066 is a Normally Closed (NC) relay switch — its output circuit is closed at rest and opens when current exceeds the threshold. Choose the model that matches your PLC or control logic requirements.
Q: Does the M3060/M3066 current sensing switch require an external power supply?
A: No. This switch is self-powered via mutual inductive current acquisition from the cable being monitored. Simply pass the single-phase wire through the 10 mm aperture and the device powers itself — no additional wiring for power is needed.
Q: How do I adjust the current sensing threshold?
A: The sensing threshold is continuously adjustable from 0.2 A to 50 A using the built-in adjustment dial on the device. Turn the dial to set your desired trigger current level. The hysteresis value is less than 1%, ensuring stable and repeatable switching without chatter.
Q: Is this current sensor safe to use in industrial environments with strong magnetic fields?
A: Yes. The mutual inductive design provides full electrical isolation between the primary (monitored cable) and the output contacts. This isolation allows the M3060/M3066 to operate reliably in strong magnetic field environments typical of industrial machinery and assembly lines.