---
product_id: 405535766
title: "Current Sensing Relay AC Current Sensing Switch 0-30A Normally Closed Amp Sensor Monitoring Relay (M3056)"
brand: "lelukee"
price: "¥6781"
currency: JPY
in_stock: false
reviews_count: 9
url: https://www.desertcart.jp/products/405535766-current-sensing-relay-ac-current-sensing-switch-0-30a-normally
store_origin: JP
region: Japan
---

# 0-30A range Hysteresis < 1% Normally closed Current Sensing Relay AC Current Sensing Switch 0-30A Normally Closed Amp Sensor Monitoring Relay (M3056)

**Brand:** lelukee
**Price:** ¥6781
**Availability:** ❌ Out of Stock

## Summary

> ⚡ Power Up Your Safety with Precision!

## Quick Answers

- **What is this?** Current Sensing Relay AC Current Sensing Switch 0-30A Normally Closed Amp Sensor Monitoring Relay (M3056) by lelukee
- **How much does it cost?** ¥6781 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/405535766-current-sensing-relay-ac-current-sensing-switch-0-30a-normally)

## Best For

- lelukee enthusiasts

## Why This Product

- Trusted lelukee brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **🛡️ Safety First:** Enjoy peace of mind with isolated input/output.
- • **🔌 Smart Monitoring:** Stay ahead with real-time current sensing.
- • **🚀 Fast Response Time:** React instantly to current changes, every time.
- • **🔄 Non-Contact Operation:** Experience seamless switching with zero wear and tear.
- • **⚙️ Adjustable Threshold:** Customize your monitoring for optimal performance.

## Overview

The Current Sensing Relay AC Current Sensing Switch (M3056) is a cutting-edge device designed for monitoring AC and DC loads up to 30A. With adjustable thresholds and a hysteresis of less than 1%, it ensures precise control and safety in high magnetic environments. Its non-contact operation guarantees durability and reliability, making it an essential tool for modern electrical management.

## Description

Current Sensing Relay AC Current Sensing Switch 0-30A Normally Closed Amp Sensor Monitoring Relay (M3056)

## Features

- Normally closed current sensing switch: when the perforation line current exceeds the set value, the green light is on and the output signal is open. The AC and DC load indirectly, when the current is less than the set value, the red light is off and the switch is off is closed
- Mutual inductive current monitoring, safety isolation of input and output, self-current monitoring
- The range of the monitored current is up to 30 A, the monitoring threshold is adjustable
- Hysteresis is less than 1%. It can be used in devices to monitor strong magnetic environment.
- Non-contact electronic switch with fast response and unlimited number of on and off operations

## Images

![Current Sensing Relay AC Current Sensing Switch 0-30A Normally Closed Amp Sensor Monitoring Relay (M3056) - Image 1](https://m.media-amazon.com/images/I/518GYJkYGnL.jpg)
![Current Sensing Relay AC Current Sensing Switch 0-30A Normally Closed Amp Sensor Monitoring Relay (M3056) - Image 2](https://m.media-amazon.com/images/I/51qmQU7u6yL.jpg)
![Current Sensing Relay AC Current Sensing Switch 0-30A Normally Closed Amp Sensor Monitoring Relay (M3056) - Image 3](https://m.media-amazon.com/images/I/51I71XOCM-L.jpg)
![Current Sensing Relay AC Current Sensing Switch 0-30A Normally Closed Amp Sensor Monitoring Relay (M3056) - Image 4](https://m.media-amazon.com/images/I/616+u86MWbL.jpg)
![Current Sensing Relay AC Current Sensing Switch 0-30A Normally Closed Amp Sensor Monitoring Relay (M3056) - Image 5](https://m.media-amazon.com/images/I/61QOZ43nRyL.jpg)

## Available Options

This product comes in different **Color** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars







  
  
    Works well with good documentation!
  

*by A***R on Reviewed in the United States on August 3, 2024*

Not only does it do exactly what it is supposed to do, but it comes with a removable terminal block to make wiring easy and it has a manual with pictures.  Very well done.

### ⭐⭐⭐⭐ 4.0 out of 5 stars







  
  
    Now up and working perfectly as described on this page...
  

*by G***L on Reviewed in the United States on March 19, 2023*

Update #3 - This device is now up and working as expected, once you get it figured out, it does the job without problems.  If any of you who ordered this device are having a specific problem, add a comment to this review and I will try to give you some tips.If you are the seller of this product, you can and should do a lot better job creating a user manual for it.Update #2 - Received a new unit today and was able to successfully get it up and running exactly as I had expected from the beginning.The problems I have encountered are ... 1) The labeling is not really clear so I ended up relabeling adjacent to the connector block and the control block and found that very helpful.  2) I am using this unit for intelligent monitoring of solar power by adding current parameters in addition to voltage parameters. and all the other devices I am using for this purpose including a number of sensor units accommodate AWG 16 stranded wire.  This device barely accommodates AWG 16, more suited to AWG 18 or 20.  3) The flat blade screw driver needed to tighten the connections on the wiring block has to be exactly the right size to be able to tighten the connection.  Otherwise to does not fit into the hole OR it is too small to wind in the retaining screw.  4) I am sure it would work fine on a DIN rail, but that makes it difficult to locate in the right spot to line up with the feed wire with the current being measured.  I ended up carefully removing the red DIN slider in order to attach it with screws to the wall.  Aside from those issues, I am very happy with this device.  It does very clearly indicate the direction of current flow through the device.Update #1 - Mostly due to the fact that the user guide information is mostly supplied in Chinese language, I connected power to the wrong terminals and damaged the unit.  But it worked well enough to demonstrate that it does a good job of monitoring current flow with a very clear arrow indicating the direction of that current flow making it easy to get that right.  So at this point everything works OK except the switch itself.  The red light over current and green light undercurrent work perfectly and I can track them as I see the current flow fluctuating on my own current meters.  So all is good at this point except the burned out relay itself.  It audibly clicks but doesn't pass actual current through the relay.  Next step at this point is to purchase and install a new D633 and label it in ENGLISH before making the connections.  When I do this and get th new unit it up and running I will again update this review along with a photo of the unit with the labels attached.First of all installing these things is hell, no matter what brand they happen to be.  You need just the right tools such as exactly right size screw drivers etc.  And the user guides are confusing.  I give credit to this vender for supplying a half way decent user guide along with very useful diagrams in the description above. Most of their competitors offer much less.  I have already tossed one of those in the  trash.  The most serious problem with this one is that this same page is used to present 13 different versions of this device.  The one I purchased was a d366.  A lot of you wanted the d633 and you ended up with them sending you a d630 which lacks the features you were expecting.  Either you checked the wrong box when you ordered (both are blue) or Amazon screwed  up and sent you the wrong one.I will be adding to this review latter after I actually get it adjusted (hopefully) and in regular service.  Depending on how that goes I will either give them more stars or take a few away.

### ⭐⭐⭐ 3.0 out of 5 stars







  
  
    Worked on second try
  

*by N***D on Reviewed in the United States on April 6, 2024*

- The first one delivered did not work.  The set point adjustment screw would turn infinitely in both directions without triggering the relay.  The input/measured current was 8 amps.-  Amazon replaced the non working one.  Replacement unit seems to be working fine.-  Installed the sensor relay on a vehicle to control aux headlights in concert with high-beam headlight switch.  When energized:  High beams on - aux lights on.  High beams off - aux lights off.So far, so good.

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.jp/products/405535766-current-sensing-relay-ac-current-sensing-switch-0-30a-normally](https://www.desertcart.jp/products/405535766-current-sensing-relay-ac-current-sensing-switch-0-30a-normally)

---

*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-03-11*