·Some details are not shown. Please refer to specification sheets for all information.

MAKF

Lightning Surge Protectors for
Electronics Equipment M-RESTER

ONE-PORT SURGE PROTECTOR FOR
POWER SUPPLY USE

Functions & Features
• Designed to protect electronics equipment from induced lightning surges entering through power supply cables
• Connected in parallel between the power and
ground lines regardless of load current
• Varistor discharge element has a high speed response without follow current
• No interruption of power supply even when the head element is removed: easy maintenance and replacing
• Degraded head element is automatically separated from the power lines to prevent overheating, with a relay contact output to alert the failure status
• Head-base connection is keyed so that only a head element of correct line voltage can be mounted
Typical Applications
• Low-voltage distribution board
• Combination with installation for large load current
 

MODEL: MAKF–[1][2]

ORDERING INFORMATION
• Code number: MAKF-[1][2]
Specify a code from below for each of [1] and [2].
  (e.g. MAKF-120/AN)

[1] OPERATIONAL VOLTAGE
120: 120 V AC
240: 240 V AC
280: 280 V AC
400: 400 V AC
480: 480 V AC

[2] OPTIONS
Configuration
/AN: Without alarm output
/BN: Head element for replacement

RELATED PRODUCTS
•Single mount adaptor (model: MBS)
•Wiring bridge (model: CNB)

GENERAL SPECIFICATIONS
Construction: Plug-in
Degree of protection: IP20 (If the solderless terminals are covered with insulation tubes.)
Surge protection type: Voltage limiting type one-port SPD
Connection
  Line: M5 screw terminal (spring up-screw type)
(torque: 2.5 N·m)
  Alarm output: Euro type connector terminal
(torque: 0.25 N·m)
Applicable wire size
 Line connection:
See the sloderless terminal drawing.
 Alarm output: 0.14 to 1.5 mm2, stripped length 7 mm
Housing material: Flame-resistant resin (black)
Alarm output: The SPDT relay trips when the thermal breaker operates and/or the head element is removed.
Rated load: 250 V AC @0.5 A (resistive load)
125 V DC @0.2 A (resistive load)
Minimum switching load: 5 V DC, 1 mA
Line voltage identification key: The connection of the head element and the base is keyed for exact matching.
Safety function: Thermal breaker incorporated
Failure indicator: The check window color changes from green (normal) to black (failed and the thermal breaker separated the M-rester from the circuit).

INSTALLATION
Operating temperature: -5 to +55°C (23 to 131°F)
Operating humidity: 30 to 90 %RH (non-condensing)
Mounting: DIN rail; Surface mounting available with the Single Mount Adaptor model: MBS.
Weight: 100 g (3.53 oz)

PERFORMANCE
Response time: ≤ 20 nsec.
Maximum discharge current: 20kA × twice (8/20 μsec.)
Nominal discharge current: 5 kA (8/20 μsec.)
Insulation resistance: ≥ 100 MΩ with 500 V DC (line to alarm output)
Dielectric strength: 2000 V AC @ 1 minute (line to alarm output)
Leakage current: ≤ 1 mA at the discharge voltages listed in the table below.

CONNECTION EXAMPLES

EXTERNAL DIMENSIONS & TERMINAL ASSIGNMENTS unit: mm (inch)

SCHEMATIC CIRCUITRY & CONNECTION DIAGRAM

MG Co., Ltd.