MODEL: MMDH

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

MMDH SPECIFICATIONS

ES-8185 Rev.1 Page 1/3

Lightning Surge Protectors for

Electronics Equipment M-RESTER

LIGHTNING SURGE PROTECTOR FOR

STANDARD SIGNAL LINE USE

(high speed/high discharge current capacity)

Functions & Features

• Designed specifically for 4 – 20 mA DC line including both

4-wire and 2-wire transmitters

• Discharge current capacity 20000 A

• Absorbing surges only without affecting instrumentation

signal

Typical Applications

• High discharge current capacity is beneficial for use in

area with frequent lightnings

S1

S2

G

65

(2.56)

128

(5.04)

60

(2.36)

mm (inch)

MODEL: MMDH–24

ORDERING INFORMATION

• Code number: MMDH-24

OPERATIONAL VOLTAGE

24: 24 V DC

RELATED PRODUCTS

•Lightning arrester for power supply use (model: MMAH)

GENERAL SPECIFICATIONS

Construction: Wall-mounted, front terminals; terminal cover

provided

Connection: M4 screw terminals (torque 0.8 N·m)

Screw terminal: Nickel-plated steel

Housing material: Steel plate t = 1.6 (black)

INSTALLATION

Operating temperature: -5 to +55°C (23 to 131°F)

Operating humidity: 30 to 90 %RH (non-condensing)

Mounting: Surface

Weight: 440 g (0.97 lbs)

PERFORMANCE

Discharge voltage (peak voltage)

Line to line: ±40 V min.

Line to ground: ±290 V min.

Maximum surge voltage

Line to line: ±50V max.

Line to ground: ±800 V max.

(The maximum voltage that could pass through this surge

protector. Protected equipment must be able to withstand

this voltage for very short time period.)

Response time: 4 nsec.

Leakage current

Line to line: ≤ 5 μA at ±30 V DC

Line to ground: ≤ 5 μA at ±140 V DC

Discharge current capacity: 20000 A (8 / 20 μsec.)

Maximum load current: 0.1 A

Internal series resistance: ≤ 0.4 Ω (including return)

Maximum line voltage: ±30 V