250V DC Miniature Circuit Breaker

The GREENWATT ZAB1Z-63 250V DC Miniature Circuit Breaker is a single-pole DC circuit protection device with a rated current of 63A and a rated voltage of DC 250V. Manufactured by Zhejiang Dongan Electrical Co., Ltd. in China, it is designed for low-voltage DC applications including small energy storage systems, DC distribution cabinets, DC charging piles, small DC power supply equipment, and DC drive systems.

The ZAB1Z-63 provides both short-circuit and overload protection. Its compact miniature design supports installation in space-limited electrical cabinets, while the DIN rail mounting structure allows straightforward installation in DC distribution applications.

Product Features

• 63A rated current for low-voltage DC circuit protection
• DC 250V rated voltage
• Single-pole (1P) design
• 6kA short-circuit breaking capacity
• Short-circuit and overload protection
• B, C and D characteristic curves
• DIN rail mounting on FN 60715 35mm rail
• Contact position indicator
• IP20 protection degree
• Cable, U-type busbar and Pin-type busbar connection options
• Top and bottom connection
• Terminal capacity up to 25mm² for cable
• 2.5 N·m tightening torque

Technical Data

Short-Circuit and Overload Protection

DC circuits require dedicated protection because DC current does not naturally pass through a zero-crossing point as AC current does. The ZAB1Z-63 is designed for DC circuit protection and uses an arc-extinguishing structure to interrupt fault currents.

Its protection characteristics include both overload and short-circuit protection.

Overload Protection

The supplied technical data specifies the overload test characteristics for the B, C and D curves.

At 1.13 In, the circuit breaker should not trip within 1 hour under the specified test condition. At 1.45 In, following the preceding test, the expected result is tripping within 1 hour.

At 2.55 In, the specified tripping time is:

• 1s < t < 60s for rated current up to 32A
• 1s < t < 120s for rated current above 32A

For the ZAB1Z-63 rated at 63A, the second condition applies.

Short-Circuit Protection

The technical data specifies different instantaneous tripping levels according to the characteristic curve:

The supplied test data also specifies that the current is applied through an auxiliary switch during these tests.

B, C and D Tripping Characteristics

The ZAB1Z-63 technical documentation provides B, C and D characteristic curves. These curves represent different instantaneous tripping ranges and can be considered when selecting the appropriate circuit-breaker characteristic for a particular DC circuit.

The selection should be based on the actual load and system requirements rather than simply choosing a curve based on the rated current.

DIN Rail Installation

The ZAB1Z-63 uses a 35mm FN 60715 DIN rail mounting system with a fast clip device. This mounting method is suitable for electrical cabinets and DC distribution equipment where standardized rail installation is required.

The terminals support cable, U-type busbar and Pin-type busbar connections. Cable terminals accommodate conductors up to 25mm², with a specified tightening torque of 2.5 N·m.

The product also supports top and bottom connection, providing flexibility when arranging components inside a distribution cabinet.

Compact Design for DC Distribution

As a miniature circuit breaker, the ZAB1Z-63 has a compact form factor intended for installation in electrical cabinets and other DC distribution equipment where installation space needs to be managed efficiently.

A contact position indicator is provided to help operators identify the contact status of the circuit breaker during inspection and maintenance.

The specified protection degree is IP20.

Typical Applications

Based on its DC circuit protection function and rated specifications, the ZAB1Z-63 can be used in:

• Small energy storage systems
• DC distribution cabinets
• DC charging piles
• Small DC power supply equipment
• DC drive systems
• Other low-voltage DC circuits requiring circuit protection

The actual suitability of the circuit breaker should be evaluated against the voltage, current, short-circuit conditions, load characteristics and installation requirements of the complete system.

Manufacturing and Testing Capability

The ZAB1Z-63 is manufactured by Zhejiang Dongan Electrical Co., Ltd., a China-based electrical manufacturer with nearly 30 years of experience in product development and manufacturing.

The company's product range includes AC MCCB, AC ELCB, AC ACB and DC MCCB products. It also provides thermosetting compression molding, metal stamping, molds and related parts.

For product development and production, the company has an R&D team and production and testing equipment including short-circuit test machines, overload test machines, medium-speed punch presses and supporting equipment used in its production lines.

The company states that its products are covered by CE, CB, TUV and CCC certifications. Its management systems include ISO 9001, ISO 14001 and ISO 45001, and the company has a RoHS 2.0 testing laboratory.

These company-level qualifications should be considered separately from the specific certifications and approvals applicable to an individual model.

OEM Production Based on Drawings or Samples

For customers with specific product requirements, Zhejiang Dongan Electrical Co., Ltd. can manufacture products according to customer drawings or samples.

The company's stated process includes discussing the product requirements in detail, confirming the product, providing samples before production, and proceeding with production after customer confirmation.

This approach can support distributors, equipment manufacturers and other buyers who require customized electrical products or production based on existing drawings and samples.

FAQ

What is the GREENWATT ZAB1Z-63?

The GREENWATT ZAB1Z-63 is a 1P DC miniature circuit breaker with a rated current of 63A, a rated voltage of DC 250V and a 6kA breaking capacity. It is designed for low-voltage DC circuit protection.

What protection does the ZAB1Z-63 provide?

The circuit breaker provides overload and short-circuit protection. The supplied technical data includes B, C and D characteristic curves with specified test currents and tripping times.

What standard does the ZAB1Z-63 follow?

The technical documentation supplied for the ZAB1Z-63 identifies IEC 60947-2 as the applicable standard.

Can the ZAB1Z-63 be installed on a DIN rail?

Yes. The product is designed for mounting on an FN 60715 35mm DIN rail using a fast clip device.

What types of terminals can be used?

The specified terminal connection types are cable, U-type busbar and Pin-type busbar. The cable terminal size is up to 25mm², with a specified tightening torque of 2.5 N·m.

What is the operating temperature range?

The specified ambient temperature range is -5°C to +40°C, with the average temperature over a 24-hour period not exceeding +35°C. The specified storage temperature range is -25°C to +70°C.

Does Zhejiang Dongan Electrical provide OEM manufacturing?

Yes. According to the company's supplied information, it can manufacture products according to customer drawings or samples and can provide samples for confirmation before mass production.

How can I request a quotation or sample?

Contact GREENWATT with the required model, quantity, application and delivery requirements. The company can discuss the product requirements and provide information regarding samples and production.