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OEM SJK47-125 MCB Miniature circuit breaker DIN Rail Mountable Supplier, Companies
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OEM SJK47-125 MCB Miniature circuit breaker DIN Rail Mountable Supplier, Companies

OEM SJK47-125 MCB Miniature circuit breaker DIN Rail Mountable Supplier, Companies

The SJK47-125 Miniature Circuit Breaker provides reliable circuit protection for 230V/400V systems with current ratings from 63A to 125A. Available in 1P, 2P, 3P and 4P configurations, this SJK47-125 MCB features high breaking capacity (10kA) and durable, flame-retardant construction. Ideal for commercial and industrial applications, the SJK47-125 Miniature Circuit Breaker ensures safe operation while protecting electrical systems from overloads and short circuits. Its compact modular design (17.5mm per pole) allows for easy installation in distribution panels. Compliant with IEC 60898 standards, this MCB offers quick trip response and stable performance under varying load conditions.

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Product Description

Type Designation
Type Designation Diagram
No. Description
1Circuit Breaker Model Number
2Design Code
3Frame Size Rated Current
4Number of Poles (Arabic numerals, Neutral pole marked as N)
5Instantaneous Release Type (C, D)
6Rated Current Value
Product Display
Product Display 1
Product Display 2
Product Display 3
Panel Overview
Panel Overview Diagram

Description:

  • 1: Power Supply Terminal
  • 2: Logo Identification
  • 3: Model Number
  • 4: Rated Current: 63A, 80A, 100A, 125A
  • 5: Rated Voltage: 230V (1P) / 400V
  • 6: Rated Frequency
  • 7: Compliance Standards
  • 8: Rated Breaking Capacity
  • 9: Contact Indication
  • 10: Wiring Diagram
  • 11: Load Side
Technical Parameters
Set Current Rated Current (A) Number of Poles Rated Voltage (V) Ultimate Breaking Capacity (Icu) (A)
(C)Ii=8.5In For Distribution Protection 63, 80, 100, 125 1 230/400 10000 (Ics=75%Icu)
2, 3, 4 400
(D)Ii=12In For Distribution Protection 63, 80, 100, 125 1 230/400
2, 3, 4 400
Protection Characteristics & Curve Diagram
Trip Type Test Current Initial State Duration Result Ref Temp
C, D1.05InColdt≤1h (In≤63A)No Trip+30℃
C, D1.3InHott≤1h (In≤63A)Trip
C, D2.55InCold1s < t < 120sTrip
C / D8.5In / 12InColdt≤0.2sNo Trip
Characteristic Curve

Figure 1: Type C & Figure 2: Type D Thermal/Magnetic Trip Characteristic Curves

Outline and Mounting Dimensions

This series of circuit breakers is rail-mounted and suitable for TH35-7.5 steel mounting rails. Unit: mm

Mounting Dimensions
Accessories Provided with the Product
The circuit breaker is equipped with 6 types of accessories: OF auxiliary contact, MX+OF shunt trip release, SD alarm contact, MV overvoltage release, MN undervoltage release, and MYMN over & undervoltage release. OF and SD are installed on the left; others are installed on the right.
Ordering Instructions

Required Specifications:

  • Product Name & Model Number
  • Rated Current & Number of Poles
  • Minimum Order Quantity

Example: Order DZ47-125 3-pole circuit breaker, Type C, rated current 100A, quantity 1000 units.
Written as: DZ47-125/3P, C100, 1000 units.

Frequently Asked Questions
Q1: What is the maximum rated current for the SJK47-125 series? A1: The SJK47-125 series supports a high rated current of up to 125A, with options for 63A, 80A, and 100A.
Q2: Which trip characteristics are available for this circuit breaker? A2: This model is available in both Type C (for standard distribution protection) and Type D (for high-inrush current protection).
Q3: What is the rated breaking capacity (Icu)? A3: The ultimate breaking capacity is 10,000A (10kA), with a service breaking capacity (Ics) of 75% Icu.
Q4: Can I install accessories like shunt trips or auxiliary contacts? A4: Yes, it supports 6 types of accessories including OF auxiliary contacts, SD alarm contacts, and shunt trip releases (MX+OF).
Q5: Is this MCB compatible with standard DIN rails? A5: Yes, it is designed for rail-mounting and is fully compatible with standard TH35-7.5 steel mounting rails.
Q6: What pole configurations are offered? A6: The SJK47-125 is available in 1-pole (1P), 2-pole (2P), 3-pole (3P), and 4-pole (4P) configurations to meet different wiring needs.

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