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

MDH

Lightning Surge Protectors for
Electronics Equipment M-RESTER

LIGHTNING SURGE PROTECTOR
FOR POWER SUPPLY USE
(DC power use)

Functions & Features
• Designed specifically for DC power supplies up to 5 amps
• Absorbing surges only without affecting instrumentation signal
• Indicator LED for surge absorber failure
• Fuse provided for detaching the discharge elements
Typical Applications
• Power supplies for control equipment
• Relays, level switches, proximity switches
• Protecting the output side of a switching regulator type power supply
 

MODEL: MDH-[1]

ORDERING INFORMATION
• Code number: MDH-[1]
 Specify a code from below for [1]
(e.g. MDH-24)

[1] OPERATIONAL VOLTAGE
12: 12 V DC
24: 24 V DC
48: 48 V DC

GENERAL SPECIFICATIONS
Construction: Plug-in
Connection: M3.5 screw terminals (torque 0.8 N·m)
Screw terminal: Chromated steel
Housing material: Flame-resistant resin (black)
Alarm indicator: Red LEDs turn off with error

INSTALLATION
Operating temperature: -5 to +55°C (23 to 131°F)
Operating humidity: 30 to 90 %RH (non-condensing)
Mounting: Surface or DIN rail
Weight: 250 g (0.55 lbs)

PERFORMANCE
Max. continuous operating voltage:
  15 V DC (MDH-12)
  30 V DC (MDH-24)
  70 V DC (MDH-48)
Discharge voltage (peak voltage)
  Line to line: 24 V min. (MDH-12)
  50 V min. (MDH-24)
  88 V min. (MDH-48)
  Line to ground: ±380 V min.
Maximum surge voltage
  Line to line:
  70 V max. (MDH-12)
  140 V max. (MDH-24)
  210 V max. (MDH-48)
  Line to ground: ±700 V max.
(The maximum voltage that could pass through M-RESTER. Protected equipment must be able to withstand this voltage for very short time period.)
Response time: ≤ 0.1 μsec.
Leakage current
  Line to line (including the current consumed by LEDs)
  ≤ 15 mA at 15 V DC (MDH-12)
  ≤ 15 mA at 30 V DC (MDH-24)
  ≤ 20 mA at 70 V DC (MDH-48)
  Line to ground: ≤ 1 mA at ±380 V DC
Discharge current capacity: 2000 A (8 / 20 μsec.)
Maximum load current: 5 A
Voltage drop: ≤ 1 V

EXTERNAL VIEW

CONNECTION EXAMPLES

GROUNDING

EXTERNAL DIMENSIONS & TERMINAL ASSIGNMENTS unit: mm (inch)

SCHEMATIC CIRCUITRY

M-System Co., Ltd.