High-Quality SJK47-63 Miniature Circuit Breaker MCB - Premium Quality from China Suppliers & Factory for Reliable Electrical Protection Factories, Factory
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High-Quality SJK47-63 Miniature Circuit Breaker MCB - Premium Quality from China Suppliers & Factory for Reliable Electrical Protection Factories, Factory

High-Quality SJK47-63 Miniature Circuit Breaker MCB - Premium Quality from China Suppliers & Factory for Reliable Electrical Protection Factories, Factory

Introducing the SJK47-63 Miniature Circuit Breaker (MCB), a top-tier circuit protection device designed for optimal performance in 220/380V AC systems (50/60Hz, up to 63A). Manufactured in China, this premium mini circuit breaker boasts ultra-high breaking capacity and flame-retardant housing, ensuring reliable overload and short-circuit protection for residential, commercial, and industrial applications. As a leading factory among suppliers, our SJK47-63 MCB adheres to stringent quality standards, including GB10963.1, IEC60898-1, and CCC regulations. Its compact design facilitates easy installation while maintaining superior performance. Choose the SJK47-63 MCB for unmatched safety and durability in all your electrical distribution needs
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Product Description

Type Designation
SJK47-63-MCCB-Circuit-Breaker-5
1 Circuit Breaker Model Number
2 Design Code
3 Frame Size Rated Current
4 Number of Poles (Arabic numerals, Neutral pole marked as N)
5 Instantaneous Release Type (C, D)
6 Rated Current Value
Product Display
SJK47-63-MCCB-Circuit-Breaker-(1)
SJK47-63-MCCB-Circuit-Breaker-(2)
SJK47-63-MCCB-Circuit-Breaker-(3)
SJK47-63-MCCB-Circuit-Breaker-(4)
Technical Parameters
Mechanical and Electrical Lifespan (Ref. Table 2) TABLE 2
Times Operating Frequency (t/h) Rated Current (A)
Electrical Lifespan 4000 240 6~32
120 40~63
Mechanical Life 20000 240 6~63
Overcurrent Protection Characteristics at 30°C~35°C (Ref. Table 3) TABLE 3
No. Rated Current of Release (A) Initial State Test Current Specified Time Expected Result Notes
1 6~63 Cold State 1.13In t≤1h In≤63A No Tripping
2 6~63 Immediately after previous test post-test condition 1.45In t<1h In≤63A Tripping Current Rises Steadily to Specified Value Within 5s
3 In≤32 Cold State 2.55In 1s<t<60s Tripping
In>32 Cold State 2.55In 1s<t<120s Tripping
4 6~63 Cold State 3In / 5In
5In / 10In
10In / 14In		 t≤0.1s / t<0.1s No Tripping / Tripping B Type
t≤0.1s / t<0.1s No Tripping / Tripping C Type
t≤0.1s / t<0.1s No Tripping / Tripping D Type
Wiring: For conductors ≤25mm² (Ref. Table 4) — Connection method: Screw-clamp terminals, Torque 2N·m Table 4
Rated Current In (A) Nominal Cross-Sectional Area of Copper Conductor (mm²)
6 1
10 1.5
16, 20 2.5
25 4
32 6
40, 50 10
63 16
Trip Characteristic Curve
SJK47-63-4
◆ Power Consumption per Pole (Ref. Table 5) Table 5
Rated Current In (A) Maximum Power Consumption per Pole (W)
6~10 2
16~32 3.5
40~63 5
Ambient Temperature (°C) -30 -20 -10 0 10 20 30 40 50 60
Current Correction Factor 1.30 1.25 1.20 1.15 1.10 1.05 1.00 0.95 0.90 0.85
Outline and Installation Dimensions

Left Picture: Installation Dimensions  |  Right Picture: TH35-7.5 Mounting Rail Dimensions

SJK47-63-7
Frequently Asked Questions
Q What is the rated current range of the SJK47-63 MCCB circuit breaker?
The SJK47-63 MCCB circuit breaker covers a rated current range of 6A to 63A, making it suitable for a wide variety of residential, commercial, and light industrial applications.
Q What trip curve types are available for the SJK47-63 MCCB?
The SJK47-63 MCCB is available in C Type and D Type instantaneous release curves. C Type is suitable for general loads, while D Type is designed for high inrush current equipment such as motors and transformers.
Q What is the mechanical and electrical lifespan of the SJK47-63 MCCB?
The SJK47-63 MCCB has a mechanical lifespan of 20,000 operations and an electrical lifespan of 4,000 operations, ensuring long-term reliable performance in demanding environments.
Q How does ambient temperature affect the SJK47-63 MCCB's performance?
Ambient temperature directly affects the current-carrying capacity. A correction factor table is provided — for example, at 40°C the correction factor is 0.95, while at -30°C it rises to 1.30. Always apply the appropriate correction factor when selecting the breaker for your installation environment.
Q What wiring connection method does the SJK47-63 MCCB use?
The SJK47-63 MCCB uses screw-clamp terminals with a recommended torque of 2N·m, supporting copper conductors up to 25mm². The required conductor cross-section varies by rated current — for example, a 63A breaker requires a 16mm² copper conductor.
Q What mounting method is used for the SJK47-63 MCCB?
The SJK47-63 MCCB is designed for DIN rail mounting using the standard TH35-7.5 mounting rail, allowing quick and easy installation within distribution panels and enclosures.

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