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

MD7FB

Lightning Surge Protectors for
Electronics Equipment M-RESTER

LIGHTNING SURGE PROTECTOR FOR
FOUNDATION Fieldbus
(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
• Shield terminal provided
• Conforms with FISCO

MODEL: MD7FB–[1][2]

ORDERING INFORMATION
• Code number: MD7FB-[1][2]
 Specify a code from below for each [1] and [2].
(e.g. MD7FB-FF0)
For the safety approval code 2, specify the product’s destination country using Ordering Information Sheet (No. ESU-8057).

[1] SHIELD TERMINAL (to earth)
FF: Floating
FG: Grounding

[2] SAFETY APPROVAL
0: None
2: CENELEC intrinsic safety (ATEX)

APPLICABLE NETWORK
FOUNDATION Fieldbus and other networks complied with IEC 61158-2
Caution: Power supply to the bus must be limited to 400 mA or less.

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 mm2
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
Values for the floating type (FF). Shortcircuited for the grounding type (FG).

STANDARDS & APPROVALS
EU conformity:
ATEX Directive 
  Ex ia EN 60079-11
  Category 1G EN 60079-26
EMC Directive 
  EMI EN 61000-6-4
  EMS EN 61000-6-2
RoHS Directive
  EN 50581
Safety approval:

Surge protection: IEC 61643-21
  (Categories C1, C2, D1)

SAFETY PARAMETERS

EXTERNAL DIMENSIONS & TERMINAL ASSIGNMENTS unit: mm (inch)

SCHEMATIC CIRCUITRY & CONNECTION DIAGRAM

MG Co., Ltd.