Wholesale SJK47-125 MCB Miniature circuit breaker DIN Rail Mountable Factories, Company

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Wholesale SJK47-125 MCB Miniature circuit breaker DIN Rail Mountable Factories, Company

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

SJK47-125-MCB-Miniature-circuit-breaker-4

1	Circuit Breaker Model Number
2	Design Code
3	Frame Size Rated Current
4	Number of Poles (Arabic numerals, Neutral pole markedas N)
5	Instantaneous Release Type (C, D)
6	Rated Current Value

Product Display

SJK47-125-MCB-Miniature-circuit-breaker-(1)

SJK47-125-MCB-Miniature-circuit-breaker-(2)

SJK47-125-MCB-Miniature-circuit-breaker-(3)

Panel Overview

Describe:

1: Power Supply Terminal

2: Company Logo

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)
(C)Ii=8.5In For Distribution Protection	63,80,100,125	2,3,4	400
(C)Ii=12In For Distribution Protection	63,80,100,125	1	230/400
(C)Ii=12In For Distribution Protection	63,80,100,125	2,3,4	400

Circuit Breaker Overcurrent Protection Characteristics & Curve Diagram

• Overcurrent Protection Characteristics of Circuit Breaker						Table 2
Trip Unit Type	Test Current (A)	Initial State	Test Duration	Expected Result	Note	Reference Temperature
C,D	1.05In	Cold State	t≤1h(In≤63A) t≤2h(In>63A)	No Trip	-	+30℃
C,D	1.3In	Immediately Followed by a Test	t≤1h(In≤63A) t≤2h(In>63A)	Trip	Current Rises to Specified Value Within 5s
C,D	2.55In	Cold State	1s<t<120s	Trip	-
C	8.5In×80%	Cold State	t≤0.2s	No Trip	Close Auxiliary Switch to Power On
D	12In×80%	Cold State	t≤0.2s	No Trip	Close Auxiliary Switch to Power On
C	8.5In×120%	Cold State	t<0.2s	Trip	Close Auxiliary Switch to Power On
D	12In×120%	Cold State	t<0.2s	Trip	Close Auxiliary Switch to Power On
Circuit Breaker Protection Characteristics Curve Diagram (see fig.1 & fig.2)

Figure 1 Type C Thermal/Magnetic Trip Characteristic Curve

Figure 2 Type D Thermal/Magnetic Trip Characteristic Curve

Outline and Mounting Dimensions

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

Accessories Provided with the Product

The circuit breaker is equipped with 6 types of accessories, including: OF auxiliary contact, MX+OF shunt trip release, SD alarm contact, MV overvoltage release, MN undervoltage release, MYMN over & undervoltage release. OF and SD are installed on the left side of the product, Other accessories are installed on the right side of the product.

Ordering Instructions

Order Specifications Required from Customers:
a) Product Name: Model Number, Rated Current;
b) Rated Current, Number of Poles;
c) Minimum Order Quantity.

Example:

Order DZ47-125 3-pole circuit breaker, Type C, rated current 100A, quantity 1000 units.

Should be written as: DZ47-125/3P, C100, 1000 units.

Frequently Asked Questions (FAQ)

What rated current options are available for this circuit breaker series?

The circuit breaker series offers rated current ratings of 63A, 80A, 100A, and 125A.

What mounting rail is compatible with this series?

This product is rail-mounted and standard-engineered to fit TH35-7.5 steel mounting rails.

What is the ultimate breaking capacity (Icu) of these circuit breakers?

The ultimate breaking capacity (Icu) is 10,000A, with an operating breaking capacity (Ics) rated at 75% Icu.

What is the difference in tripping curve types (Type C vs Type D)?

Type C tripping characteristics operate at Ii=8.5In for standard distribution protection, while Type D units are designed for inductive loads operating at Ii=12In.

How should auxiliary contacts and release accessories be installed?

OF auxiliary contacts and SD alarm contacts must be installed on the left side of the unit. Other accessories, such as shunt trip and undervoltage releases, install on the right side.

How do I correctly specify product details when ordering?

Orders should outline the model name, number of poles, trip type, rated current, and quantity (e.g., DZ47-125/3P, C100, 1000 units).

Wholesale SJK47-125 MCB Miniature circuit breaker DIN Rail Mountable Factories, Company

Product Description

Type Designation

Product Display

Panel Overview

Technical Parameters

Circuit Breaker Overcurrent Protection Characteristics & Curve Diagram

Outline and Mounting Dimensions

Accessories Provided with the Product

Ordering Instructions

Frequently Asked Questions (FAQ)

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