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MDR2

Lightning Surge Protectors for
Electronics Equipment M-RESTER

LIGHTNING SURGE PROTECTOR FOR
MULTI-CHANNEL USE
(high discharge current capacity)

Functions & Features
• Protection for semiconductor switches of discrete outputs against lightning surge damage
• Applicable to both negative and positive common signals
• Applicable to multi analog signals (non-isolation between channels)
• Space saving with multi-channel protectors
• LED monitor indicating degradation of voltage limiter
• LED monitor driven by discrete I/O signal without auxiliary power supply

MODEL: MDR2–8[1][2]

ORDERING INFORMATION
• Code number: MDR2-8[1][2]
 Specify a code from below for each [1] and [2].
(e.g. MDR2-8NA)

NUMBER OF PROTECTORS
8: 8 points

[1] COMMON
N: Negative common (NPN)
P: Positive common (PNP)

[2] LEAKAGE CURRENT INDICATOR
Y: None
A: With

GENERAL SPECIFICATIONS
Construction: terminal board; terminal cover provided
Connection: M3.5 screw terminals (torque 1.1 N·m)
Screw terminal: Nickel-plated steel
Housing material: Steel
LED monitor: Red
The leakage current from voltage limiter increases due to its degradation.
LED becomes brighter gradually in proportion to this leakage current.

INSTALLATION
Operating temperature: -5 to +55°C (23 to 131°F)
Operating humidity: 30 to 90 %RH (non-condensing)
Mounting: Surface
Weight: 520 g (1.15 lb)

PERFORMANCE
Response time: ≤ 4 nsec
Leakage current @ max. voltage
  Line to COM: 5 μA
  Line to line: 5 μA
  COM to earth: 5 μA
Max. discharge current (Imax)
  Line to COM: 10 kA
  Line to line: 10 kA
  COM to earth: 10 kA
Nominal current (IN): 150 mA
Internal series resistance: 22 Ω ±20 %
Surge protection: IEC 61643-21 Categories C1, C2, D1

STANDARDS & APPROVALS
EU conformity:
EMC Directive 
  EMI EN 61000-6-4
  EMS EN 61000-6-2
RoHS Directive
  EN 50581

CONNECTION EXAMPLES

GROUNDING

EXTERNAL DIMENSIONS & TERMINAL ASSIGNMENTS unit: mm (inch)

SCHEMATIC CIRCUITRY

M-System Co., Ltd.