ES-8169 Rev.6
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 lb)
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