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EKR3 RS485 smart MCB product photo white background

EKR3 RS485 Smart MCB | Remote Control & Monitoring

● Product type: Smart MCB (Miniature Circuit Breaker)
● Series / variant: EKR3 RS485
● Communication method code: 5 = RS485
● Functions: Overload protection, short-circuit protection, remote closing and timing control, real-time switch status monitoring
● Operation modes: Automatic mode (remote control via RS485); Manual mode (local operation only)
● No. of poles: 1P, 2P, 3P, 4P
● Rated currents (In): 10, 16, 25, 32, 40, 50, 63A
● Rated voltage (Ue): 240V (1P, 2P), 415V (3P, 4P)
● Rated short-circuit capacity (Icn): 6kA
● Trip curve: B, C
● RS485 baud rate: 2400 / 4800 / 9600 (default)
● Installation: Mounting on 35mm DIN rail; incoming method from top
● Protection degree: IP20

PDF
Product Profile

Product Profile

Overview

EKR3 smart MCB provides not only overload and short-circuit protection like traditional circuit breakers, but also the ability to remotely control the closing and timing of the MCB through the Tuya APP or RS485 platform, as well as obtain the switch status of the device.

EKR3 smart MCB is an ideal choice for smart home and industrial automation systems, offering circuit protection, remote control, and monitoring capabilities to improve energy management efficiency, enhance power safety, and provide users with more control options.

This product page is for the RS485 communication variant of EKR3 (type code communication method: 5).

Features

Traditional Protection

  • Overload protection
  • Short-circuit protection

Advanced Functionalities

  • Remote closing and timing control of the circuit breaker
  • Real-time switch status monitoring

Multiple Communication Methods

  • WiFi (Tuya)
  • ZigBee (Tuya)
  • RS485
  • Dry Contact

Automatic, Manual Mode

  • Automatic mode allows remote control (Tuya APP, RS485).
  • Manual Mode, only supports local manual operation

Mechanical Padlock

When the mechanical lock is pulled out, the switch enters a locked state, preventing the switch from being turned on. To restore the device, press down the mechanical lock.

EKR3 RS485 features including traditional protection, advanced functionalities, communication methods, automatic/manual mode and mechanical padlock
Features

Introduction of structure

EKR3 structure callouts showing power supply, buckle, indicator light, mode switch, mechanical lock, distribution button, WiFi antenna and RS485
Introduction of structure

Structure labels from the catalog: Power supply, Buckle, Indicator Light, Mode Switch, Mechanical Lock, Distribution Button, WiFi Antenna, RS485.

EKR3 485 dry contact terminal definition with 485A, 485B, Dry contact G, IN1 and IN2
485 Dry contact terminal

485 Dry contact terminals: 485A, 485B, Dry contact G, IN1, IN2.

Application

  • Smart home systems, which can be integrated into the overall home automation solution.
  • Commercial buildings, which can achieve centralized energy management.
  • Industrial facilities, which can remotely monitor and control individual circuits.
  • Locations where electricity consumption requires regular control, such as billboard lighting and public area lighting.
EKR3 RS485 application scenes for smart home, commercial buildings, industrial facilities and public lighting control
Application scenes
Model Preparation Meaning

Model Preparation Meaning

Instruction of Type Code

EKR3 RS485 instruction of type code structure and meaning
Instruction of Type Code

Example type code structure for this product: EK R3 - 5 - 2P C 63

  • EK — Company code
  • R3 — Series code
  • 5 — Communication method (this product: 5 = RS485)
    • 0: WiFi (Tuya)
    • 1: Dry Contact
    • 2: ZigBee (Tuya)
    • 5: RS485
  • 2P — No. of poles: 1P, 2P, 3P, 4P
  • C — Trip curve: B, C
  • 63 — Rated currents (In): 10, 16, 25, 32, 40, 50, 63A
Technical Data

Technical Data

 

Technical Parameter

EKR3 RS485 technical parameter table part 1
Technical Parameter (part 1)
EKR3 RS485 technical parameter table part 2
Technical Parameter (part 2)
No. of poles 1P, 2P, 3P, 4P
Supply terminal L-N (It is advisable to draw power from the incoming line)
Power supply voltage 220/230V
Standby power consumption < 3W
Status indicator LED
Rated voltage (Ue) 240V (1P, 2P), 415V (3P, 4P)
Rated currents (In) 10, 16, 25, 32, 40, 50, 63A
Rated frequency 50/60Hz
Rated short-circuit capacity (Icn) 6kA
Energy limiting class 3
Rated impulse withstand voltage (Uimp) (1.2/50μs) 4kV
Dielectric test voltage 2kV (50/60Hz, 1 min.)
Trip curve B: (3-5) x In, C: (5-10) x In
Electrical life 4000 Cycles
Mechanical life 10000 Cycles
Trip time ≤ 1s
Communication method WiFi (Tuya), 2.4GHz; ZigBee (Tuya); Dry contact; RS485, Baud rate: 2400/ 4800/ 9600 (default)
This product communication RS485, Baud rate: 2400 / 4800 / 9600 (default)
Operational safety Mechanical padlock, Ensure safety during onsite maintenance
Monitoring physical data Switch state, Device operating status
Function description Overload protection, Short circuit protection, Multiple timing, Remote control
Protection degree IP20
Ambient temperature -5℃ to +40℃ (Current capacity is significantly reduced at 70℃)
Storage temperature -25℃ to +70℃
Max. Supply terminal size for cable 2.5mm²
Terminal connection type Cable/Pin-type busbar
Max. conductor cross-sections for cable 25mm²
Altitude ≤2000m
Installation Mounting on 35mm DIN rail
Incoming method From top
Dimensions

Dimensions

Dimensions and Wiring Diagram

EKR3 RS485 dimensions and wiring diagrams for 1P 2P 3P 4P and power supply terminal
Dimensions and Wiring Diagram

Dimension drawings cover side view and front views for 1P / 2P / 3P / 4P, including overall width values 36mm / 54mm / 72mm / 90mm, height-related marks such as 80mm / 45mm / 5mm / 3.5mm, and side depth marks such as 50mm / 36mm.

Wiring diagrams show power supply terminal (L / N) and pole wiring for 1P / 2P / 3P / 4P (L, N / A, B, C / A, B, C, N as applicable).