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

MDPA-24

Lightning Surge Protectors for
Electronics Equipment M-RESTER

LIGHTNING SURGE PROTECTOR FOR
STANDARD SIGNAL LINE & PULSE USE

Functions & Features
• Designed specifically for 4 – 20mA DC and
pulse signal line including both 4-wire and 2- wire transmitters
• Life monitor function helps you to decide when you should replace the surge protector; reduces maintenance and prevents downtime
• Pressing CHK (Check) button confirms the degradation and life span of the surge protection circuits with LEDs
• Absorbs surges only without affecting instrumentation signal
• No interruption of signal by unplugging surge protector element

MODEL: MDPA–24[1]

ORDERING INFORMATION
• Code number: MDPA-24[1]
 Specify a code from below for [1].
 (e.g. MDPA-24/BN/Q)
• Specify the specification for option code /Q
 (e.g. /C01)

[1] OPTIONS (multiple selections)
Configuration
blank: With Base (model: SK-2E) included
/BN : Element only for replacement
(Not selectable with DIN rail mounting adapter)
DIN Rail Mounting Adapter
blank: Without
/A33: With adapter (model A-33)
Other Options
blank: none
/Q: Option other than the above (specify the specification)

SPECIFICATIONS OF OPTION: Q
COATING (For the detail, refer to M-System's web site.)
/C01: Silicone coating
/C02: Polyurethane coating
/C03: Rubber coating

RELATED PRODUCTS
• Base (model: SK-2E)

GENERAL SPECIFICATIONS
Construction: Plug-in
Connection: M4 screw terminals (torque 0.8 N·m)
Screw terminal: Nickel-plated steel
Housing material: Flame-resistant resin (black)
Indicators: Activated by CHK (Check) button, see the status table shown below.
  BAT: Green LED
  ALM: Red LED
Degradation judged: When the leakage current at the voltage limiter exceed approx. 7.5 μA.
Life time judged: When the number of discharges of the discharge element reaches the expected life span.
CHK button: Push button; momentary
Battery: Lithium; No recharge or replacement available.
Battery life: 10 years (when used ≤ 2 minutes/month)

INSTALLATION
Operating temperature: -5 to +55°C (23 to 131°F)
Operating humidity: 30 to 85 %RH (non-condensing)
Mounting: Surface or DIN rail
Weight: 150 g (0.33 lb), standard
175 g (0.39 lb), with DIN rail mounting adapter

PERFORMANCE
Max. continuous operating voltage (Uc): 
 Line to line: 30 V  
 Line to earth: ±160 V
Voltage protection level (Up):
• @ 1 kV (100 A)
 Line to line: 45 V 
 Line to earth:  ±650 V
• @ 2 kV (1 kA) 
 Line to line: 50 V
 Line to earth: ±650 V
Response time:
 Line to line: ≤ 4 nsec.
 Line to earth: ≤ 20 nsec.
Leakage current:
 Line to line: ≤ 5 μA @ 30 V DC
 Line to earth: ≤ 5 μA @ ±140 V DC
Max. discharge current (Imax): 5000 A (8 / 20 μs)
Nominal current (IN): 100 mA
Internal series resistance: 20 Ω ±10 % (including return)
Capacitance @ 1 MHz:
 Line to line:  ≤ 1000 pF
 Line to earth: ≤ 100 pF
Surge protection: IEC 61643-21 Categories C1, C2, D1

EXTERNAL VIEW

CONNECTION EXAMPLES

GROUNDING

EXTERNAL DIMENSIONS & TERMINAL ASSIGNMENTS unit: mm (inch)

MOUNTING REQUIREMENTS unit: mm (inch)

SCHEMATIC CIRCUITRY & CONNECTION DIAGRAM

M-System Co., Ltd.