ES-8280 Rev.5

MD6T-65

Lightning Surge Protectors for
Electronics Equipment M-RESTER

LIGHTNING SURGE PROTECTOR FOR
STANDARD SIGNAL LINE & PULSE USE

(conduit mount, weather-proof; 65 V DC line voltage)
Functions & Features
• Designed specifically for 4 – 20 mA DC and pulse signal line including both 4-wire and 2-wire transmitters
• Direct mount in a wiring conduit of outdoor
enclosures
• Absorbs surges only without affecting instrumentation signal

MODEL: MD6T–65–[1][2][3]

ORDERING INFORMATION

• Code number: MD6T–65–[1][2][3]
Specify a code from below for each of [1] through [3].
(e.g. MD6T-65-00B)
For the safety approval code 4, specify the product’s destination country using Ordering Information Sheet (No. ESU-8284).

[1] SAFETY APPROVAL

0: None
4: ATEX flameproof

[2] WIRING CONDUIT

0: G 1/2 (Not selectable for ATEX flameproof approval)
1: 1/2 NPT
2: M20 × 1.5

[3] BODY MATERIAL

B: Brass
S: Stainless steel

CAUTION

The packing of the cable gland must be separate from the body. Choose an appropriate one for the environment in which the surge protector is used.

GENERAL SPECIFICATIONS

Degree of protection: IP65
Wiring conduit: See ‘Ordering information.’
Connection
Cable side: Euro type terminal block (Applicable wire size:
0.14 – 1.5 mm² (AWG26 – 16) for both stranded and solid
wires; stripped length 6 mm)
Equipment side: Leadwires (leadwire diameter AWG20 for grounding; AWG22 for the protected equipment)
Body material: Nickel-plated brass or stainless steel 316

INSTALLATION

Operating temperature:
No Safety approval: -40 to +85°C (-40 to +185°F)
  ATEX approval:
   -40 to +80°C (-40 to +176°F) (T5)
   -40 to +75°C (-40 to +167°F) (T6)
Mounting: Screwed into an electrical conduit of outdoor enclosures
Weight: 500 g (1.1 lb)

PERFORMANCE

Discharge voltage (peak voltage)
Line to line: 70 V min.
Line to ground: ±160 V min.
Max. surge voltage
Line to line: 100 V max.
Line to ground: ±650 V max.
(The maximum voltage that could pass through the surge protector. Protected equipment must be able to withstand this voltage for a very short time period.)
Response time:
Line to line: ≤ 4 nsec.
Line to ground: ≤ 20 nsec.
Leakage current:
Line to line: ≤ 5 μA @ 70 V DC
Line to ground: ≤ 5 μA @ ±160 V DC
Discharge current capacity: 10000 A (8/ 20 μsec.)
Max. load current: 100 mA
Internal series resistance: Approx. 22 Ω including return
Max. line voltage
Without safety approval: 70 V DC
With safety approval: 66 V DC
Capacitance @ 1 kHz:
Line to line: ≤ 2500 pF
Line to ground: ≤ 100 pF

STANDARDS & APPROVALS

EU conformity:
ATEX Directive
Ex db EN 60079-1
EMC Directive
EMI EN 61000-6-4
EMS EN 61000-6-2
RoHS Directive
Safety approval:

CONNECTION EXAMPLES

EXTERNAL DIMENSIONS unit: mm [inch]

SCHEMATIC CIRCUITRY & CONNECTION DIAGRAM