Claire
Mr.Fu
Claire
SJK47-63 Miniature Circuit Breaker MCB - Premium Quality from China Suppliers & Factory for Reliable Electrical Protection
Type Designation
| 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
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
| ◆ 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
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.