MODEL: MDH

http://www.m-system.co.jp/

MDH SPECIFICATIONS

ES-8169 Rev.5 Page 1/3

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

50

(1.97)

123

(4.84)

80

(3.15)

mm (inch)

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