MD7AST LIGHTNING SURGE PROTECTOR FOR STANDARD SIGNAL LINE

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MD7AST

Lightning Surge Protectors for
Electronics Equipment M-RESTER

LIGHTNING SURGE PROTECTOR FOR
STANDARD SIGNAL LINE

(ultra-slim; life monitor)
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
• Life monitor function helps you to decide when you should replace the surge protector; reduces maintenance and prevents downtime
• Incorporated battery
• Pressing CHK (Check) button confirms with
LEDs the degradation and life span of the surge protection circuits

MODEL: MD7AST–[1][2][3]

ORDERING INFORMATION

• Code number: MD7AST-[1][2][3]
Specify a code from below for each of [1] through [3].
(e.g. MD7AST-24FF/Q)
• Specify the specification for option code /Q
(e.g. /C01)

[1] NOMINAL VOLTAGE

24: 24 V DC
60: 60 V DC

[2] SHIELD TERMINAL (line / earth)

FF: Floating / Floating
FG: Floating / Grounding

[3] OPTIONS

blank: none
/Q: With options (specify the specification)

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 mm², stripped length 8 mm
Grounding: DIN Rail
Housing material: Flame-resistant resin (black)
Indicators: Activated by CHK (Check) button
BAT: Green LED
ALM: Red LED
Degradation judged: When the leakage current at the voltage limiter exceeds approx. 7.5 μA.
Life time judged: When the count of the discharge element discharging 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 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)