ES-8061 Rev.9
MD73W
Lightning Surge Protectors for
Electronics Equipment M-RESTER
LIGHTNING SURGE PROTECTOR FOR
THREE-WIRE SIGNAL LOOP
(ultra-slim)
Functions & Features
• High discharge current capacity 20 kA (8 / 20 μs), 1 kA (10 / 350 μs)
• Ultra-thin 7-mm-wide module can be mounted
in high density
• Excellent protection employing multi-stage SPD circuits
• DIN rail mounting and grounding
Typical Applications
• Protecting a 3-wire transmitter loop
• Protecting an electronic device I/O
MODEL: MD73W–32[1][2]
ORDERING INFORMATION
• Code number: MD73W-32[1][2]
Specify a code from below for each of [1] and [2].
(e.g. MD73W-320/Q)
For the safety approval code 2, specify the product’s destination country using Ordering Information Sheet (No. ESU-8057).
• Specify the specification for option code /Q
(e.g. /C01)
NOMINAL VOLTAGE
32
: 32 V DC
[1] SAFETY APPROVAL
0
: None
2
: ATEX intrinsic safety
[2] OPTIONS
blank
: none
/Q
: With options (specify the specification)
(ATEX intrinsic safety not available)
SPECIFICATIONS OF OPTION: Q
COATING (For the detail, refer to our web site.)
/C01
: Silicone coating
/C02
: Polyurethane coating
GENERAL SPECIFICATIONS
Construction
: Slim-sized front terminal structure
Degree of protection
: IP20
Connection
: Euro terminal block (torque 0.3 N·m)
Applicable wire size
: 0.2 – 2.5 mm
2
, stripped length 8 mm
Grounding
: DIN Rail
Housing material
: Flame-resistant resin (black)
INSTALLATION
Operating temperature
: -25 to +85°C (-13 to +185°F)
(See Safety Parameters for use in a hazardous location.)
Operating humidity
: 30 to 90 %RH (non-condensing)
Mounting
: DIN Rail (TH35-7.5, 1-mm-thick)
Oxide film on the surface of an aluminium DIN rail may lower the electric conductivity between this module and the ground. Use a steel or copper rail.
Weight
: 70 g (2.5 oz)
PERFORMANCE
Max. continuous operating voltage (Uc):
Line to line: ±32 V
Line to earth: ±32 V
Voltage protection level (Up) @ 6 kV (1.2 / 50 μs)
:
Line to line: ±60 V
Line to earth: ±60 V
Response time
:
Line to line: ≤ 4 nsec.
Line to earth: ≤ 20 nsec.
Leakage current @Uc
:
Line to line: ≤ 5 μA
Line to earth: ≤ 5 μA
Max. discharge current (Imax)
: 20 kA (8 / 20 μs); 1.0 kA (10 / 350 μs)
Nominal current (I
N
)
: 400 mA
Internal series resistance
: ≤ 2.2 Ω ±20 % per line
Surge protection
: IEC 61643-21 Categories C1, C2, D1
STANDARDS & APPROVALS
EU conformity
:
ATEX Directive
Ex ia EN 60079-11
EMC Directive
EMI EN 61000-6-4
EMS EN 61000-6-2
RoHS Directive
Safety approval
:
SAFETY PARAMETERS
EXTERNAL DIMENSIONS & TERMINAL ASSIGNMENTS unit: mm [inch]
SCHEMATIC CIRCUITRY & CONNECTION DIAGRAM