Gap-type Class B Power Surge Protector MCD 50-B
Contact Info
- Add:深圳市龙华区大浪街道龙华社区龙军花园9栋2单元1202, Zip: 518023
- Contact: 刘先生
- Tel:0755-88834928
- Email:1002196429@qq.com
Other Products
Feature Overview MCD 50-B MCD 125-B/NPE Advantages of Use
| Low protection level (Up ≤ 1.3 kV) | No need to design decoupling devices or maintain installation spacing between Class B and Class C surge protective devices. |
| Compact EMC structure | Saves over 45% of installation space |
| In TT and TN-S systems, when installed with Class C surge protective devices, MCD 125-B/NPE can be shared for both Class B and Class C surge protection. | Cost and installation space savings |
Function and Application Areas
Surge protective devices MCD 50-B and MCD 125-B/NPE meet the requirements of DIN VDE 0675 Part 6 (Draft 11.89) A1, A2 for Class B devices, as well as the standards of IEC 61643-1 (02.89) for Class Ι surge protective devices. When used in conjunction with subsequent voltage-limiting surge protective devices, no decoupling devices are required, allowing the two levels of protection to be installed together. This product represents OBO's latest development in multi-electrode graphite stacking technology for spark gap surge protective devices.
MCD 50-B, with its low protection voltage level (Up ≤ 1.3 kV), ensures that no decoupling devices or installation spacing between Class B and Class C surge protective devices are needed. This saves over 45% of installation space, making MCD 50-B particularly beneficial for compact Z-MC concepts. Additionally, the NPE discharge gap MCD 125-B/NPE, with its high current-carrying capacity, can serve as the NPE protection module for both Class B and Class C surge protective devices in TT and TN-S systems, saving costs and installation space.
The primary application environments for the new MCD 50-B and MCD 125-B/NPE surge protective devices are those requiring compact lightning protection concepts or the installation of both Class B and Class C surge protective devices in a single small equipment room. Examples include mobile and microwave communication base stations.
Installation
The housing dimensions of MCD 50-B and MCD 125-B/NPE meet the space-saving 17.5 mm width module requirement, making the devices easy to install. The SPD is conveniently installed by snapping onto a 35 mm DIN rail. MCD 125-B/NPE provides two terminals for the N and PE lines, facilitating Kelvin connections between the SPD and the circuit.
Technical Parameters
| Rated voltage UN | 230 V/50-60 Hz | |
| Maximum continuous operating voltage UC | 255 V | |
| Demand level －According to DIN VDE 0675 Part 6 (Draft 11.89) A1, A2 －According to IEC 61643-1 | B Class Ι | NPE discharge gap |
| Lightning protection zone | 0→1 | |
| Insulation resistance Rins | >100 MΩ | |
| Voltage protection level Up | ≤1.3 kV | |
| Response time TA | <100 ns | |
Surge current test (10/350)－Lightning current parameters according to IEC 61312-1 (02.95) | 50 kA 25 As 0.63 MJ/Ω | 125 kA 62.5 As 3.9 MJ/Ω |
| Follow current interruption capability at Uc Ip Maximum asymmetric short-circuit current | 12.5 kA rms 25 kA rms | 100 A rms |
| Maximum series fuse (required only if not present in the grid) | 500 A gL/gG | |
| Follow current interruption capability (with 500 A gL series fuse) Maximum asymmetric short-circuit current | 17.6 kA rms 25 kA rms | |
| Temperature range | -40℃ to +85℃ | |
| Connection conductor cross-section Single-core/stranded/flexible Tightening torque (MA) at least 4 Nm | 10-50/10-25/10-35 mm² AWG 8-2 | |
| Industry Category | Electrical-Equipment-Supplies |
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| Product Category | |
| Brand: | 德国obo |
| Spec: | MCD 50-B |
| Stock: | |
| Origin: | China / Guangdong / Shenshi |
