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Key Features

  • Low Power Consumption
  • Built-in High-Frequency Noise Filter
  • Internal Blanking Circuit
  • High-Gain Differential Amplifier Circuit
  • Minimum 100 μA Output Current for SCR Drive
  • Built-in Thyristor
  • High Noise Immunity and Surge Margin

Applications

  • Industrial Earth Leakage Circuit Breakers (ELCBs)
MFS-COB
In electrical protection devices such as earth leakage circuit breakers, it is important to quickly and reliably detect leakage currents caused by insulation faults or electrical failures. In particular, reliable leakage current detection technology is required to minimize false operation caused by external noise or transient abnormal signals while ensuring stable tripping when actual leakage current occurs.

COBON TECH’s MFS-COB is an integrated semiconductor circuit incorporating an amplifier circuit and a thyristor for high-speed earth leakage circuit breakers. It precisely amplifies and processes leakage current signals detected by a Zero-Phase Current Transformer (ZCT) and drives the built-in thyristor. It integrates a differential amplifier, time-delay circuit, latch circuit, and precision reference voltage circuit. In addition, a high-frequency noise filter effectively suppresses abnormal input noise, while an internal blanking circuit minimizes the effects of output noise. It also provides appropriate time-delay characteristics required by IEC 60947-2, supporting stable leakage current detection and tripping operation.

MFS-COB is available in 30 mA, 100 mA, 200 mA, and 500 mA models and can be applied to industrial earth leakage circuit breakers (ELCBs).
Key Features
  • Low Power Consumption
  • Built-in High-Frequency Noise Filter
  • Internal Blanking Circuit
  • High-Gain Differential Amplifier Circuit
  • Minimum 100 μA Output Current for SCR Drive
  • Built-in Thyristor
  • High Noise Immunity and Surge Margin

Applications

  • Industrial Earth Leakage Circuit Breakers (ELCBs)

MFS-COB Specifications

MODEL Working Voltage Trip Current (mA) Trip Time
Spec Min Typ Max
MFS-COB 30 DC 10–20 V 30 20 23 26 30 ms
MFS-COB 100 100 65 75 85
MFS-COB 200 200 130 150 170
MFS-COB 500 500 330 380 430
Operating Junction Temperature -35 ~ +80 °C
Supply Current 3 mA
Supply Voltage DC 10~20 V


RCD Type Symbols Models Properties
AC MFS-COB Sinusoidal AC
Demensions

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Personal Information Collected

1. The Company collects the following personal information to provide customer support and various services.

  • Required information: Name, contact number, email address

2. The following information may be automatically generated and collected during the use or processing of services.

  • Cookies, service usage records, access logs
Methods of Collecting Personal Information

The Company collects personal information through the following methods.

  • Use of services and submission of inquiries
Purpose of Collecting and Using Personal Information

The Company uses the collected personal information (including updated information) for the following purposes.

  • Member management: Personal identification, prevention of unauthorized or improper use, identity verification to prevent misuse of another person's personal information, handling complaints and other inquiries, and delivery of notices
  • Statistical purposes: Analysis of access frequency, statistics on members' use of services, and provision of services based on statistical characteristics
Retention and Use Period of Personal Information

In principle, users' personal information will be destroyed without delay once the purpose of its collection and use has been fulfilled. However, certain information may be retained for the periods specified below when required by applicable laws and regulations. Where retention is required under applicable laws and regulations, including the Commercial Act and the Act on the Consumer Protection in Electronic Commerce, etc., the Company retains such information for the period prescribed by law. In such cases, the retained information will be used only for the purpose of retention, and the retention periods are as follows.

  • Records concerning contracts or withdrawal of offers: 5 years (Act on the Consumer Protection in Electronic Commerce, etc.)
  • Records concerning consumer complaints or dispute resolution: 3 years (Act on the Consumer Protection in Electronic Commerce, etc.)
  • Records concerning identity verification: 6 months (Act on Promotion of Information and Communications Network Utilization and Information Protection, etc.)
  • Records concerning website visits: 3 months (Protection of Communications Secrets Act)
Procedures and Methods for Destroying Personal Information

In principle, the Company destroys personal information without delay once the purpose of its collection and use has been fulfilled. The procedures and methods are as follows.

Destruction Procedure
  • After the purpose has been fulfilled, the information provided by the user is transferred to a separate database (or stored in a separate filing cabinet in the case of paper documents), retained for a certain period in accordance with internal policies and applicable laws and regulations for information protection purposes (see Retention and Use Period), and then destroyed.
  • Such personal information will not be used for any purpose other than the purpose for which it is retained, unless otherwise required by law.
Destruction Method
  • After the purpose has been fulfilled, the information provided by the user is transferred to a separate database (or stored in a separate filing cabinet in the case of paper documents), retained for a certain period in accordance with internal policies and applicable laws and regulations for information protection purposes (see Retention and Use Period), and then destroyed.
  • Such personal information will not be used for any purpose other than the purpose for which it is retained, unless otherwise required by law.
  • Personal information printed on paper is destroyed by shredding or incineration.
  • Personal information stored in electronic file format is deleted using technical methods that prevent the data from being recovered.
Duty to Notify
  • If any additions, deletions, or revisions are made to this Privacy Policy, notice will be provided through the "Notices" section of the website at least 7 days before the changes take effect.
KOR
Personal Information Collected

1. The Company collects the following personal information to provide customer support and various services.

  • Required information: Name, contact number, email address

2. The following information may be automatically generated and collected during the use or processing of services.

  • Cookies, service usage records, access logs
Methods of Collecting Personal Information

The Company collects personal information through the following methods.

  • Use of services and submission of inquiries
Purpose of Collecting and Using Personal Information

The Company uses the collected personal information (including updated information) for the following purposes.

  • Member management: Personal identification, prevention of unauthorized or improper use, identity verification to prevent misuse of another person's personal information, handling complaints and other inquiries, and delivery of notices
  • Statistical purposes: Analysis of access frequency, statistics on members' use of services, and provision of services based on statistical characteristics
Retention and Use Period of Personal Information

In principle, users' personal information will be destroyed without delay once the purpose of its collection and use has been fulfilled. However, certain information may be retained for the periods specified below when required by applicable laws and regulations. Where retention is required under applicable laws and regulations, including the Commercial Act and the Act on the Consumer Protection in Electronic Commerce, etc., the Company retains such information for the period prescribed by law. In such cases, the retained information will be used only for the purpose of retention, and the retention periods are as follows.

  • Records concerning contracts or withdrawal of offers: 5 years (Act on the Consumer Protection in Electronic Commerce, etc.)
  • Records concerning consumer complaints or dispute resolution: 3 years (Act on the Consumer Protection in Electronic Commerce, etc.)
  • Records concerning identity verification: 6 months (Act on Promotion of Information and Communications Network Utilization and Information Protection, etc.)
  • Records concerning website visits: 3 months (Protection of Communications Secrets Act)
Procedures and Methods for Destroying Personal Information

In principle, the Company destroys personal information without delay once the purpose of its collection and use has been fulfilled. The procedures and methods are as follows.

Destruction Procedure
  • After the purpose has been fulfilled, the information provided by the user is transferred to a separate database (or stored in a separate filing cabinet in the case of paper documents), retained for a certain period in accordance with internal policies and applicable laws and regulations for information protection purposes (see Retention and Use Period), and then destroyed.
  • Such personal information will not be used for any purpose other than the purpose for which it is retained, unless otherwise required by law.
Destruction Method
  • After the purpose has been fulfilled, the information provided by the user is transferred to a separate database (or stored in a separate filing cabinet in the case of paper documents), retained for a certain period in accordance with internal policies and applicable laws and regulations for information protection purposes (see Retention and Use Period), and then destroyed.
  • Such personal information will not be used for any purpose other than the purpose for which it is retained, unless otherwise required by law.
  • Personal information printed on paper is destroyed by shredding or incineration.
  • Personal information stored in electronic file format is deleted using technical methods that prevent the data from being recovered.
Duty to Notify
  • If any additions, deletions, or revisions are made to this Privacy Policy, notice will be provided through the "Notices" section of the website at least 7 days before the changes take effect.