RP-Onesto KSP-6-275 Surge Arrester SPD 3P+N Type 1+2 – 50kA, 275VAC DIN Rail

The RP-Onesto KSP-6-275 is a Type 1+2 Surge Protection Device (SPD) for three-phase installations, combining Class I and Class II protection in one 4-module DIN rail unit. It uses a semiconductor valve element to divert lightning-induced voltage transients safely to earth, protecting downstream equipment. Installation must be carried out by a certified electrician.

Key Features

• SPD classification: Type 1+Type 2 per EN61643-11 and Class I+Class II per IEC61643-11
• Maximum discharge current (8/20μs): 50kA
• Lightning impulse current (10/350μs): 6kA
• Nominal discharge current (8/20μs): 20kA
• Maximum continuous operating AC voltage: 275V
• Voltage protection level: 1.3kV
• Response time: ≤25ns
• Green/Red operational state and fault indicator
• Mounts on 35mm DIN rail, 4 modules wide
• Enclosure material: Thermal plastic UL94-V0

Product Benefits

• Combined Type 1+2 rating provides both direct lightning strike (Class I) and induced surge (Class II) protection from a single device
• Semiconductor valve operation allows the arrester to withstand high momentary overloads and return to high resistance automatically after the surge
• Green/Red visual indicator makes fault diagnosis straightforward without measurement equipment
• IP20 rated, UL94-V0 enclosure material meets fire-resistance requirements for panel installation

Technical Specifications

• Brand: RP-Onesto
• Model: KSP-6-275 (type 30196)
• SKU: 511794
• Modules: 4
• Classification (EN61643-11): Type 1+Type 2
• Classification (IEC61643-11): Class I+Class II
• Max. Continuous Operating Voltage: 275V AC
• Lightning Impulse Current (10/350μs): 6kA
• Nominal Discharge Current (8/20μs): 20kA
• Max. Discharge Current (8/20μs): 50kA
• Voltage Protection Level: 1.3kV
• Max. Backup Fuse: 100A gG
• Short-Circuit Withstand Capacity: 25kA
• Temporary Overvoltage 5s Withstand: 440V
• Temporary Overvoltage 200ms Withstand: 1455V
• Response Time: ≤25ns
• Operating Temperature: -40°C to 80°C
• Status Indicator: Green (operating) / Red (fault)
• Protection Rating: IP20
• Conductor Cross-Section Min.: 4mm²
• Conductor Cross-Section Max.: 25mm²
• Mounting: 35mm DIN rail
• Enclosure Material: Thermal plastic UL94-V0

Why You'll Love It

• Single device replaces separate Class I and Class II arresters, simplifying panel design and reducing component count
• Wide operating temperature range (-40°C to 80°C) suits both indoor distribution boards and harsh-environment enclosures
• Visual fault indicator ensures the device status can be checked at a glance during routine panel inspections