The Dongfa Intelligent DZ47LE Series Residual Current Protection RCBO integrates residual current, overload, and short-circuit protection in one device. The product is designed for terminal distribution applications where these protection functions need to be provided within the same circuit protection device.
The series covers rated currents from 6A to 63A and is available in 1P+N, 2P, 3P, 3P+N, and 4P configurations. Rated residual operating current options include 30mA and 50mA, while C type and D type instantaneous trip characteristics are available for different load starting conditions.
The DZ47LE combines residual current protection, overload protection, and short-circuit protection in one device. This configuration allows the three protection functions to be handled within the same terminal protection unit.
The Residual Current Protection RCBO is available with rated residual operating currents of 30mA and 50mA. The appropriate specification can be selected according to the residual current protection requirements of the circuit and connected equipment.
Two instantaneous trip characteristics are available:
Selection should be based on the starting characteristics of the connected load.
The series supports 1P+N, 2P, 3P, 3P+N, and 4P configurations, with rated current options from 6A to 63A. These configurations allow the device to be matched with different terminal circuit arrangements.
The rated residual making and breaking capacity IΔm is 2000A. This value defines the specified making and breaking capability of the device under residual current fault conditions.
Before shipment, each Residual Current Protection RCBO undergoes mechanical operation testing, residual current characteristic testing, and dielectric withstand testing. Residual operating current and operating time are checked according to the applicable product requirements.
The RCBO can be used in terminal distribution circuits for residential and commercial buildings, including lighting, socket circuits, and other end-use circuits requiring combined protection.
For shops, offices, commercial buildings, and similar facilities, the DZ47LE can be selected according to circuit current, residual current protection requirements, and the characteristics of the connected load.
The Residual Current Protection RCBO can be installed in industrial control cabinets and terminal distribution equipment. For motors, transformers, compressors, and other loads with higher starting current, the D type characteristic can be selected according to the load.
The integrated protection functions make the DZ47LE suitable for distribution boxes where residual current, overload, and short-circuit protection are required within a compact terminal protection device.
For replacement or electrical retrofit projects, the existing breaker model, pole configuration, rated current, residual operating current, trip characteristic, mounting dimensions, and required quantity should be confirmed before production.
| Parameter | Specification |
| Product Type | Miniature Circuit Breaker with Residual Current Protection (RCBO) |
| Product Series | DZ47LE |
| Pole/Wire Configurations | 1P+N, 2P, 3P, 3P+N, 4P |
| Rated Voltage | 230V (1P+N, 2P); 230/400V (3P, 3P+N, 4P) |
| Rated Current | 6A, 10A, 20A, 25A, 32A, 40A, 50A, 63A |
| Rated Residual Operating Current | 30mA / 50mA |
| Instantaneous Trip Characteristic | C type (5-10In); D type (10-14In) |
| Rated Short-Circuit Capacity | 4500A / 6000A |
| Rated Residual Making and Breaking Capacity | 2000A |
| Rated Residual Non-Operating Current | 0.5IΔn |
| Residual Current Operating Time | IΔn ≤0.1s; 2IΔn ≤0.05s; 5IΔn ≤0.04s |
| Overload Protection | 1.13In no trip; 1.45In trip |
| Short-Circuit Protection | 2.25In: 1-60s for In≤32A and 1-120s for In>32A; 5In: no trip within 0.1s; 10In: C type trip within 0.1s; 16In: D type trip within 0.1s |
The rated residual non-operating current is 0.5IΔn. At rated residual operating current IΔn, the break time is ≤0.1s; at 2IΔn, it is ≤0.05s; and at 5IΔn, it is ≤0.04s. These residual current operating characteristics comply with the requirements of IEC 61009.
Under the specified test conditions, the RCBO does not trip at 1.13In within 1 hour in the cold state. At 1.45In, it trips within 1 hour following the previous test condition.
For overcurrent testing, 2.25In corresponds to a trip time of 1-60s for In≤32A and 1-120s for In>32A.
At 5In, the device does not trip within 0.1s for both C type and D type characteristics. At 10In, the C type trips within 0.1s. At 16In, the D type trips within 0.1s.
Select 1P+N, 2P, 3P, 3P+N, or 4P according to the circuit configuration and distribution system.
The available rated current is 6A-63A. Selection should be based on the normal operating current and load requirements of the protected circuit.
Choose 30mA or 50mA according to the required residual current protection level and the application requirements of the protected circuit.
Choose C type for conventional loads such as lighting and sockets, or D type for loads with higher starting current such as motors, transformers, and compressors.
The available rated short-circuit capacities are 4500A and 6000A. The required value should be confirmed according to the short-circuit conditions of the installation system.
For an existing Residual Current Protection RCBO replacement or electrical retrofit project, please provide the following information:
These details can be used to confirm the appropriate product configuration before production.
Zhejiang Dongfa Intelligent Electrical Technology Co., Ltd. was founded in 2012 and is located in Yueqing Economic Development Zone, Wenzhou, Zhejiang, China.
For replacement and customized projects, product specifications are confirmed according to the required configuration before production.
Dongfa Intelligent's electrical products have been exported to Southeast Asia and parts of Europe, with product configurations reviewed according to the requirements of different markets.
An MCB provides overload and short-circuit protection. An RCBO additionally provides residual current protection, integrating these protection functions into one device.
An RCBC provides residual current protection but normally requires a separate overcurrent protection device. An RCBO integrates residual current protection with overload and short-circuit protection in one unit.
Choose 30mA or 50mA according to the required residual current protection level and the application requirements of the protected circuit.
C type has an instantaneous trip characteristic of 5-10In and is generally used for conventional loads. D type has a characteristic of 10-14In and is used for loads with higher starting current.
Please provide the pole/wire configuration, rated current, rated residual operating current, trip characteristic, short-circuit capacity, and quantity. For replacement projects, the original model and mounting dimensions are also recommended.
Standard products generally require 7-15 working days, while customized products generally require 15-30 working days. The actual production schedule can be confirmed according to the product configuration.
Yes. Dongfa Intelligent operates its own manufacturing facility in Yueqing, Zhejiang, and supports factory audits. The company holds ISO 9001, ISO 14001, and ISO 45001 management system certifications.
For the Residual Current Protection RCBO DZ47LE Series, please provide the required rated current, pole/wire configuration, residual operating current, trip characteristic, and short-circuit capacity. For replacement projects, the original breaker model and mounting dimensions can also be provided for configuration confirmation.
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No. 281, Wei 18th Road, Yueqing Economic Development Zone, Yueqing, Wenzhou, Zhejiang, China
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