NSP20H4385TTR – High-Performance Lightning & Surge Protection Device

General Description

The NSP20H4385TTR is a power-type surge protection device (SPD) designed according to GB 18802.1-2011 / IEC61643-1:2005 standards. It provides reliable secondary protection for L-N and N-PE connections.

Environmental Conditions

• Operating temperature: -40℃ to +80℃
• Relative humidity: ≤ 95%
• Atmospheric pressure: 70kPa ~ 106kPa

Product Features

• Composed of 3 varistor-type power modules, 1 gas discharge tube module, and a base.
• Provides secondary surge protection for L-N and N-PE.
• Reverse-plugging and inter-plugging protection functions between modules.
• Equipped with overheat protection, failure indication, and integrated remote signal alarm dry contacts.
• Supports remote monitoring/control of installation reliability and operating state.

Technical Data

Protection Mode : L-N : N-PE

Max Continuous Operating Voltage (Uc) : 385V AC 50/60Hz : 260V AC 50/60Hz

Nominal Discharge Current (In, 8/20 μs) : 20kA : 20kA

Max Discharge Current (Imax, 8/20 μs) : 40kA : 40kA

Voltage Protection Level (Up) : 1.8kV : 1.5kV

Response Time (tA) : ≤ 25ns : ≤ 100ns

Follow Current Interrupting Rating (Ifi) : - : 100Arms

Max Back-up Fuse : 125A gL/gG : -

Remote Signal Alarm Contact Rating : AC: 250V/0.5A, 125V/2A; DC: 30V/2A : -

Torque (Terminal / Signal Interface) : 2.5Nm / 0.25Nm : -

Casing Material : PBT V-0 : -

Protection Level (IP Code) : IP20 : -

Installation Mode : 35mm standard DIN-rail : -

Application System : TN, TT : -

Dimensions

• Width: 72 ± 0.5 mm
• Height: 90 ± 0.5 mm
• Depth: 68 ± 1 mm
• Other key dimensions: 45 ± 1 mm, 100 ± 1 mm, 52 ± 1 mm

Connection Notes

• F1 ≤ 125A gL/gG + F2 ≤ 125A gL/gG
• F1 ≤ 80A gL/gG