Product Description
The OOHMAGE MDN20 Type 2+3 AC SPD AC Surge Protection Device is designed to protect electrical systems from internal and external surges, such as lightning strikes and power transients. Featuring Metal Oxide Varistor (MOV) technology and a low residual voltage design, the MDN20 SPD ensures maximum safety for residential, commercial, and industrial applications. This high-performance SPD provides 10kA nominal discharge current and 20kA maximum discharge current, effectively preventing damage to sensitive electrical components.
Features
✔ Type 2+3 Surge Protection – Offers dual-layer protection against power surges and lightning-induced voltage spikes, ideal for secondary surge protection in commercial and residential systems.
✔ 10kA Nominal Discharge Current (In) – Ensures effective surge suppression, safeguarding electrical appliances, circuits, and sensitive equipment.
✔ 20kA Maximum Discharge Current (Imax) – Capable of handling high-energy transients, protecting power systems from severe voltage surges.
✔ MOV (Metal Oxide Varistor) Technology – Utilizes advanced varistor voltage limiting to clamp excessive voltages and minimize electrical damage.
✔ Low Residual Voltage Design – Limits post-surge voltage to prevent secondary electrical failures.
✔ Thermal Disconnection Mechanism – Built-in thermal disconnection device ensures safe operation under overload conditions.
✔ Pluggable Design – Easy maintenance and replacement, minimizing downtime and maintenance costs.
✔ Status Indicator (Green/Red LED) – Real-time visual monitoring of operational status and surge failure detection.
✔ Remote Signaling Option – Supports remote fault detection, allowing integration into building management systems for real-time surge alerts.
✔ DIN Rail Mountable (35mm) – Standardized mounting design, ensuring quick installation in electrical panels.
✔ Global Standard Compliance – Fully certified under IEC 61643-11, EN 61643-11, and GB/T 18802.11.
✔ Certified for Safety & Quality – Approved by CE, TUV, UKCA, CB, ensuring global regulatory compliance.
Why Choose the MDN20 SPD?
✔ Enhanced Protection – Provides secondary surge protection for electrical systems, reducing voltage fluctuations and electrical faults.
✔ Reliable Surge Protection Manufacturer – OOHMAGE is a leading surge protection device manufacturer, ensuring high-performance SPDs for global markets.
✔ Bulk Purchase Options – Competitive pricing available for wholesale buyers, making it an ideal surge protector supplier for large-scale installations.
✔ International Certification & Compliance – Meets IEC 61643-11, CE, TUV, and UKCA safety standards, ensuring premium product quality.
✔ Trusted by Contractors & Industries – The MDN20 surge protection device is widely used in industrial, commercial, and residential power systems.
Specifications
Technical Data | ||||
Model | MDH7-275 | MDH7-320 | MDH7-385 | MDH7-440 |
SPD Type | Type 1+2 | |||
Technology | MOV (Metal Oxide Varistors) | |||
Max. continuous operating voltage [Uc] | 275Vac | 320Vac | 385Vac | 440Vac |
Temporary Overvoltage Test Value TOV-5s(Tolerance) [Ut] | 335Vac | 335Vac | 500Vac | 580Vac |
Temporary Overvoltage Test Value TOV-120min(Disconnection) [Ut] | 440Vac | 440Vac | 650Vac | 770Vac |
Nominal discharge curent(8/20us) [ln] | 20kA | |||
Max.discharge current (8/20us) [lmax] | 50KA | |||
Impulse Discharge Current(10/350μs) [limp] | 7kA | 7kA | 7kA | 6.25kA |
Voltage Protection level [Up] | ≤1.5kV | ≤1.6kV | ≤1.8kV | ≤2.0kV |
Short-circuit current rating [Isccr] | 25kA | |||
Response time [tA] | ≤25ns | |||
Thermal Disconnection Device | Insertion | |||
Max. Backup Fuse | 125A gG Fuse | |||
Mechanical Data | ||||
SPD configuration | AC system | |||
Plugable | Available | |||
Mounting | 35mm DIN rail | |||
Enclosure Material | Thermoplastic,conform to UL94 V-0 | |||
0perating Temperature Range | -40°C…-85°C | |||
Protection rating | IP20 | |||
Normal/fault Display | Green / Red | |||
Remote Signal | Optional | |||
Wiring for remote signaling | Max.1.5mm solid/flexible | |||
Max.Voltage / Current for remote signaling | 250V/0.1A;125V/0.2A;75V/0.5A | |||
Standards | IEC/EN 61643-11 | |||
Certificate | TUV,CE,UKCA,CB,IEC,RoHS,REACH,CQC | |||
Packing Data | ||||
Pole | 1+0 | 2+0/1+1 | 3+0 | 4+0/3+1 |
Weight (1 piece) | 150g | 250g | 350g | 450g |
Package Quantity(PCS/CTN) | 144 | 72 | 48 | 36 |
CTN Size | 46*30.5*15.9cm | |||
Certification
What kind of environments is the surge protector suitable for?
The surge protective devices are rated for IP20 protection, making them suitable for indoor use in environments with low exposure to dust and moisture. They can operate in temperatures from -40°C to +85°C, ensuring performance in diverse conditions.
What is the response time of the surge protective device?
The SPD offers an extremely fast response time of ≤25ns, ensuring your DC systems are protected from instantaneous surges and that the devices respond almost immediately to any surge event.
What is the installation process for the surge protective device?
The surge protectors are designed for easy installation on a 35mm DIN rail and feature screw terminal wiring for conductors between 2.5–25mm², simplifying the connection process for both industrial and residential applications.
How do the surge protectors protect against lightning strikes?
The SPD has a lightning impulse current rating of up to 12.5kA for 10/350μs, which helps protect against lightning strikes and large surges, diverting harmful currents safely away from your electrical equipment.
What is the maximum voltage the SPD can handle?
The SPD can handle a maximum continuous operating voltage of 600Vdc to 1500Vdc, making it suitable for a wide range of solar power systems and other DC applications.
What is a Type 1+2 surge protective device?
A Type 1+2 SPD provides both direct lightning strike protection (Type 1) and protection from residual and induced surges (Type 2). The OMYH9 series is designed to protect photovoltaic systems and DC electrical systems from both types of surges.
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