Easy9
Schneider Electric catalog image for this SKU; may represent the product family.
SURGE ARRESTER
Easy9 surge arrester - 3P + N - 400 V - 20000 A
SKU EZ9L33720Schneider Electric EZ9L33720 is a surge arrester in the Easy9 range. Key specifications include mounting mode: Clip-on; mounting support: DIN rail; ip protection: IP20 on terminal:.
Clip-onmounting mode
DIN railMounting support
IP20 on terminal:IP protection
PRODUCT DATA
Technical specifications
Source: Schneider Electric product catalog.
Verified September 06, 2026.
| Product reference | EZ9L33720 |
|---|---|
| Range of product | Easy9 |
| Product or component type | Surge arrester |
| Device short name | Easy9 SPD |
| Poles | 3P + N |
| Remote signalling | Without |
| Surge arrester type | Electrical distribution network |
| Earthing system | TN-S TT |
| Disconnector device type | Associated circuit breaker at 400 V |
| Surge arrester class type | Type 2 |
| Surge arrester technology | MOV + GDT |
| Nominal discharge current | Common mode: 10 kA (N/PE) Common mode: 10 kA (L/N) |
| Maximum discharge current | Differential mode: 20 kA L/N Differential mode: 20 kA N/PE |
| [Uc] maximum continuous operating voltage | Differential mode: 275 V L/N Differential mode: 275 V N/PE |
| Maximum [Up] voltage protection level | Differential mode 1.3 kV type 2 L/N |
| Local signalling | Green and red flag |
| mounting mode | Clip-on |
| Mounting support | DIN rail |
| 9 mm pitches | 8 |
| Height | 90 mm |
| Width | 72 mm |
| Depth | 66.2 mm |
| Colour | Grey (RAL 7035) |
| Response time | <= 25 ns |
| Connections - terminals | Tunnel type terminal (downside) 5…35 mm² solid or flexible |
| Tightening torque | 3.5 N.m |
| Standards | IEC 61643-11 |
| Product certifications | EAC GOST |
| IP degree of protection | IP20 on terminal: |
| Relative humidity | 5…90 % |
| Operating altitude | 2000 m |
| Ambient air temperature for operation | -5…60 °C |
| Ambient air temperature for storage | -5…70 °C |
For complete electrical ratings, applicable standards, connection requirements and installation instructions, consult the official Schneider Electric reference ↗.