Type 3 surge arrester MSB6 series

for measurement and control circuitsfor automationelectronic equipment

Product Overview

• Compact Type 3 surge protector for 24 V supply networks
• Available for 24 Vac or 24 Vdc
• LED operating indicator and audible buzzer for status
• Hard-wired connection (wires); mounting on AC outlet or screw terminal
• MOV-based technology, IP20 protection, internal thermal disconnector
• Compliant with IEC/EN 61643-11 and UL1449 ed.5

Description
MSB6 Type 3 surge protectors are designed for secondary protection of sensitive equipment and for coordination with primary surge protection devices. The device uses a compact varistor-based design to provide the discharge capability required for secondary positions. The unit signals operational state with an audible buzzer and a green LED: LED ON = operating, LED OFF = disconnected (fail-safe disconnection). Suitable for control panels, automation equipment and instrumentation.

Electrical specifications

• Reference / Model: MSB6-24/LD
• Part Number: 561313
• SPD type: Type 3
• Network: 24 V supply
• Nominal line voltage (Un): 24 V
• Max. AC operating voltage (Uc): 30 Vac
• Max. DC operating voltage (Uc): 38 Vdc
• Operating current (Ic) (continuous at Uc): None
• Follow current: None
• Nominal discharge current (In) (15 x 8/20 µs): 0.5 kA
• Max. discharge current (Imax) (8/20 µs per pole): 2 kA
• Withstand on combination waveform (IEC 61643-11) (1.2/50µs - 8/20µs): Uoc 1 kV
• Protection mode(s): Common mode & Differential mode
• Protection level UP L/N @ In (8/20µs) and (1.2/50µs): 0.18 kV
• Protection level UP L/PE @ In (8/20µs) and (1.2/50µs): 0.18 kV
• Technology: MOV (Metal Oxide Varistor)
• Connection to network: Wires (hard-wired)

Mechanical specifications

• Compact design
• Mounting: AC outlet or screw terminal
• Housing material: Thermoplastic UL94 V-0
• Operating temperature (Tu): -40 to +85 °C
• Protection rating: IP20
• Failsafe mode: Automatic disconnection from AC network at end-of-life
• Disconnection indicator: Green LED OFF
• Operating indicator: Green LED ON
• Thermal disconnector: Internal
• Dimensions: See diagram
• Weight: 0.022 kg
• Certification: EAC

Standards and certification

• IEC 61643-11 / EN 61643-11
• UL1449 edition 5