Type 2 surge protection unit MSB10 series

type 3for electrical installationswith fault indication

Key features

• Compact Type 2+3 surge protector for low-voltage systems
• Wall or plate mounting with hard-wired connection
• Status and disconnection indicators (green LED)
• Protection rating: IP65
• Certified UL1449 edition 5; compliant with IEC/EN 61643-11
• MOV + GDT hybrid technology

Overview
The MSB10-120(UL) is a compact coordination surge protector designed to provide secondary protection for sensitive equipment in industrial and commercial low-voltage installations. It is intended to be installed downstream of a primary surge device, offering reliable clamping and controlled discharge behavior based on varistor technology with gas discharge tube assistance.

Electrical Properties

• SPD type: IEC 2+3
• Network: 120 V single-phase
• AC system: TT-TN
• Nominal line voltage (Un): 120 Vac
• Max. AC operating voltage (Uc): 150 Vac
• Temporary Over Voltage (TOV) 5 s (UT): 180 Vac (withstand)
• Temporary Over Voltage (TOV) 120 min (UT): 230 Vac (disconnection)
• Operating current (Ic): None (continuous at Uc)
• Follow current: None
• Nominal discharge current (In) 15 x 8/20 µs: 3 kA
• Max. discharge current (Imax) 8/20 µs per pole: 10 kA
• Combination waveform withstand (IEC 61643-11, class III 1.2/50µs-8/20µs) Uoc: 6 kV
• IEEE overvoltage withstand: 10 kV / 10 kA
• Protection modes: Common and differential mode
• Protection level Up L/N @ In (8/20µs): 1 kV
• Protection level Up L/PE @ In (8/20µs): 1 kV
• Admissible short-circuit current (Isccr): 10 000 A

Mechanical Properties

• Technology: MOV + GDT
• Connection to network: Hard-wired (wires)
• Mounting: Wall or plate
• Housing material: Thermoplastic UL94 V-0
• Operating temperature: -40 to +85 °C
• Protection rating: IP65
• Failsafe mode: Disconnection from AC network on end-of-life
• Disconnection indicator: Green LED OFF; Operating indicator: Green LED ON

Norms & Certifications

• Standards: IEC 61643-11 / EN 61643-11
• Certification: UL1449 ed.5, EAC

Deconnector

• Thermal disconnector: Internal
• Recommended installation residual-current device (if present): Type 'S' or delayed

Schematics
Refer to the product schematics and wiring diagram for detailed installation, terminal identification and recommended grounding practices.

Technical specifications

• Reference / Model: MSB10-120(UL)
• Part Number: 561601
• SPD type: 2+3
• Network: 120 V single-phase (TT/TN)
• Nominal voltage Un: 120 Vac
• Max. AC operating voltage Uc: 150 Vac
• TOV 5 s: 180 Vac withstand
• TOV 120 min: 230 Vac disconnection
• In (15 x 8/20 µs): 3 kA
• Imax (8/20 µs per pole): 10 kA
• Combination waveform Uoc (IEC): 6 kV
• IEEE withstand: 10 kV / 10 kA
• Protection levels Up L/N and L/PE @ In: 1 kV
• Isccr: 10 000 A
• Technology: MOV + GDT
• Mounting: Wall or plate
• Housing: Thermoplastic UL94 V-0
• Operating temperature: -40 to +85 °C
• Protection rating: IP65
• Thermal disconnector: Internal
• Certifications: UL1449 ed.5, EAC