DCB2-63 MCB

The DCB2-63 Miniature Circuit Breaker (MCB) is designed for overcurrent protection in AC 50/60Hz power distribution systems with a rated voltage of 230 V/400 V and rated current up to 63 A. It provides reliable circuit protection against short circuits (up to 6,000 A breaking capacity) and overloads,supporting infrequent making, breaking, and isolation of circuits in residential, commercial, and light industrial applications.

Ambient Air Temperature: -5°C to +40°C;
Altitude: Not exceeding 2000 m.
Pollution Degree: 2.
Installation Category: III.
Mounting Position: Mounting surface inclination: ±5° max.

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PRODUCT DESCRIPTION

• Ambient Air Temperature: -5°C to +40°C; the average temperature over a 24-hour period shall not exceed +35°C. For operation under conditions exceeding +40°C or below -5°C, please consultation with the manufacturer is required.
• Altitude: Not exceeding 2000 m.
• Atmospheric Conditions: The air shall be clean. At a maximum temperature of +40°C, the relative humidity shall not exceed 50%. Higher relative humidity is permissible at lower temperatures, for example, up to 90% at +20°C. Appropriate measures (e.g., drainage provisions) shall be taken to prevent the effects of occasional condensation due to temperature variations.
• Pollution Degree: 2.
• Installation Category: III.
• Mounting Position: The inclination of the mounting surface from the vertical plane shall not exceed ±5°.
• Shock and Vibration: The product shall be installed and operated in an environment free from significant vibration, shock, or mechanical stress.
• Derating: If installed within an enclosed protective enclosure, especially when multiple units are installed in close proximity, the product should be operated under derated conditions. A derating factor of 0.7 to 0.8 is recommended; the higher value may be applied for metal enclosures, while the lower value is recommended for all-plastic enclosures.

SPECIFICATIONS

Time-Current Operating Characteristics (Reference Temperature: 30°C)

Test	Type	Test Current	Initial State	Tripping/Non-tripping Time Limits	Expected Results	Remark
a	C,D	1.13In	Initial State	t ≥ 1h	Non-Tripping
b	C,D	1.45In	Follow a	t < 1h	Tripping
c	C,D	2.55In	Code State	1s < t < 60s (In ≤ 32A) 1s < t < 120s (In> 32A)	Tripping	The current steadily rises to the specified value within 5 seconds.
d	C	5In	Code State	t ≥ 0.1s	Non-Tripping	Turn on the current by closing the auxiliary switch.
d	D	10In	Code State	t ≥ 0.1s	Non-Tripping	Turn on the current by closing the auxiliary switch.
e	C	10In	Code State	t ≥ 0.1s	Tripping	Turn on the current by closing the auxiliary switch.
e	D	14In	Code State	t ≥ 0.1s	Tripping	Turn on the current by closing the auxiliary switch.

Tripping Characteristic Curve

Type C: 5~10 In

Type D: 10~20 In

PRODUCT FEATURES

The circuit breaker features an advanced structure, reliable performance, high breaking capacity, and a compact, aesthetically pleasing design. All internal components are precisely positioned within a plastic housing. The housing is made of high-strength,arc-resistant, and flame-retardant material, ensuring excellent impact resistance and flame-retardant properties. The contact system utilizes an electrodynamic repulsion mechanism, providing an effective current-limiting function and significantly enhancing the breaking capacity. The tripping unit adopts an electromagnetic release (solenoid type), ensuring accurate and stable tripping current.

Multi-pole models are assembled from individual single-pole units. • The circuit breaker is designed for use by non-specialized personnel and requires no maintenance. The protective characteristicsof the overcurrent tripping unit are factory-set and cannot be adjusted by the user, ensuring consistent performance.

• The circuit breaker is designed to accommodate the side-mounting of various accessories, such as earth leakage trip units, shunt trip units, auxiliary contacts, alarm contacts, and similar components.

• The terminal connection accommodates copper conductors with a cross-sectional area of up to 25 mm². The mounting rail is a TH35-7.5 standard DIN rail.

DCB2-63 MCB

PRODUCT DESCRIPTION

SPECIFICATIONS

PRODUCT FEATURES

DIMENSIONS AND INSTALLATION

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