MTL Instruments MA05, MA10 Specifications

• Combines high quality filtering with

'ring' suppression

• Three different packages available,

Wall/floor mounted (I)
DIN-rail mounted (D)
Standard filter case (SC)

• Added thermal fuse protection

• Unique design for EMC compliance —

exceeding IEC61000-4-5, level 4

technical datasheet

MA05/10 Series

Unique units combining filtering, surge and ring suppression for protection
against the effects of electrical disturbances on ac power cabling

The MA05 and MA10 Series protects
electronic equipment and computer networks
against the effects of ‘noise pollution’
induced in mains power supplies. A unique
combination of circuit elements ‘cleans up’ the
effects of industrial noise and surges caused
by lightning, switching devices, thyristor
controls, transmission system overloads and
power-factor correction circuits.

The units are available in alternative
versions – ‘SC’ suffixed models housed

in standard filter ‘cans with connections
via safety-shrouded spade terminations’;
‘Standard’ I units for wall or floor mounting
in a plastic enclosure with screw terminals
inside; or ‘D’ suffixed units for G- or Top-hat
section DIN-rail mounting. The ‘SC’ and ‘I’
units are useful for OEM incorporation into
packaged systems as a superior alternative
to conventional filters and also for retro-fitting
to existing systems. The ‘D’ type units are
ideally suited to protecting panel-mounted
equipment.

With a unique ‘three-stage’ combination
of protection elements, these units suppress
conducted RFI and voltage surges. The
circuit elements are; first, surge clipping
components to absorb transient surges that
may otherwise damage equipment; second,
a filter to suppress noise in the system; and
third, ‘ring’ suppression. The third of these
prevents surges causing the filter to ‘ring’
(oscillate) under low load conditions – an
effect that actually accentuates interference
in most commercially available filters. The
‘Transient response’ graph printed overleaf
illustrates the typical output response of an
MA10/D when a 6kV, 3kA standard 8/20µs
surge is applied to the input.

The MA05 and MA10 devices operate in
both signal directions and therefore reduce
both electro-magnetic emissions and the
susceptibility of the associated equipment
to emissions from other sources. Thermal
fusing is also incorporated into each device
as an additional safety feature.

Manufactured in accordance with
ISO9001, the performance of all units is

tested before despatch and exceeds the
requirements of IEC 61000-4-5, level 4. Since
MA05/10 devices suppresss conducted RFI
and voltage surges they enable associated
equipment to comply with this aspect of the
European ‘CE’ mark standards.

901-116 Rev H 290110

www.mtl-inst.com [e-mail]

MA05/10 EMC/Surge Protection Devices

Guide to applications and selection

Industrial Control Systems

Industrial control systems utilising programmable logic controllers (plc) and industrial computers are particularly vulnerable due to the aggressive
electrical environments for which they are intended, such as process plants, factories and water treatment sites. Although industrial computers
and plcs are designed to be rugged, protection against the extreme voltage surges caused by lightning activity and the switching of large electrical
motors demands the extra protection provided by the DIN rail mounting MA05/D and MA10/D units. Typically used in the controls section of a motor
control cubicle (MCC), this range provides voltage surge and RFI protected power.

Mains Isolator

Figure 1 ‘Typical MA05/D or MA10/D installation for industrial control

EUROPE (EM EA): +44 ( 0)1582 723633 THE AMER ICAS: [phone] ASIA-PACIF IC: [phone]

[e-mail] [e-mail] [e-mail] 901-116 Rev H 280110

The give n data is only i ntended as a p roduct des criptio n and shoul d not be rega rded as a leg al warra nty of pro perti es
or guara ntee. In the in terest of fur ther tec hnical d evelopme nts, we rese rve the r ight to make de sign chan ges.

Computer/OEM Equipment

Increased reliance on computers in industry and the workplace, coupled with an increasingly ‘noisy’ electrical supply and a higher incidence of
lightning activity has led to a higher risk of costly system downtime and disruption. In turn, this has led to the need to manufacture equipment
that is resistant to voltage surges and radio frequency interference (RFI), as laid down in the EMC directives. The MA05/SC, MA10/SC, MA05/I and
MA10/I units are designed to be easily incorporated into OEM equipment such as industrial computers, mobile telephone base stations, closed
circuit tv (cctv) systems and can help with EMC compliance and ‘CE’ marking.

Figure 2 ‘Typical’ MA**/SC or MA**/I installation in OEM equipment

Typical RFI and surge protection performance
MA05/D and MA10/D units

The following graphs are prepared from test results made on typical units.

Figure 3 Typical output response of an MA10/D

EUROPE (EM EA): +44 ( 0)1582 723633 THE AMER ICAS: [phone] ASIA-PACIF IC: [phone]

[e-mail] [e-mail] [e-mail] 901-116 Rev H 280110

The give n data is only i ntended as a p roduct des criptio n and shoul d not be rega rded as a leg al warra nty of pro perti es
or guara ntee. In the in terest of fur ther tec hnical d evelopme nts, we rese rve the r ight to make de sign chan ges.

SPECIFICATION

All figures typical at 77°F (25°C) unless other wise st ated

Maximum surge current

6.5kA (8/20µs)

Maximum leakage current

<0.3mA at working voltage

Maximum continuous operating current

Rated
MA05 devices 5A at 30°C
MA10 devices 10A at 30°C
Derated
MA05 devices 1A/10°C above 35°C
MA10 devices 2A/10°C above 45°C

Working voltage

MA**/*/1 110V
MA**/*/2 240V

Maximum continuous operating voltage

110V versions 132V
240V versions 253V

Limiting voltage

110V versions <400V
240V versions <800V

Maximum attenuation (typical)

73dB (series mode);
70dB (common mode)
Bandwidth 50/60Hz

Impulse energy absorption

110V versions 210J
240V versions 420J

Ambient temperature limits

-13°F — +185°F (–25°C to +85°C)

Humidity

5 to 95% RH (non-condensing)

Casing

SC models
Cold-rolled steel casing, tin-plated
D models
Polyamide-PA, with G- or T-section
DIN-rail mounting foot UL94-V0
I models
Plastic ABS - VO IP50 rated

Connectors

SC models
Low-profile safety spade terminators,
or ‘Faston’ connectors
D and I models
Screw-clamp

Terminals
D and I models

0.4” (2.5mm2) —12 AWG

Weight

5.3 oz (150g) — SC models

3.5 oz (100g) — D models)

5.6 oz (160g) — I models

Dimensions

See figures 4, 5 and 6

Warning

These units must be protected by an
external fuse

Maximum fuse rating

MA05 5A
MA10 10A
Fuse rating may need to be reduced
depending on power supply capability
or equipment fitted downstream of SPD

Figure 4 Dimensions and mounting — MA05/SC and MA10/SC

Figure 5 Dimensions and mounting — MA05/D and MA10/D

Figure 6 Dimensions and mounting — MA05/I and MA10/I

To order specify -

MA05/SC/1 ‘filter-can’ 110V, 5Amp

MA10/SC/1 ‘filter-can’ 110V, 10Amp

MA05/SC/2 ‘filter-can’ 240V, 5Amp

MA10/SC/2 ‘filter-can’ 240V, 10Amp

MA05/D/1 ‘DIN-rail’ 110V, 5Amp

MA10/D/1 ‘DIN-rail’ 110V, 10Amp

MA05/D/2 ‘DIN-rail’ 240V, 5Amp

MA10/D/2 ‘DIN-rail’ 240V, 10Amp

MA05/I/1 Wall/floor mounting 110V, 5Amp

MA10/I/1 Wall/floor mounting 110V, 10Amp

MA05/I/2 Wall/floor mounting 240V, 5Amp

MA10/I/2 Wall/floor mounting 240V, 10Amp

The give n data is only i ntended as a p roduct des criptio n and shoul d not be rega rded as a leg al warra nty of pro perti es
or guara ntee. In the in terest of fur ther tec hnical d evelopme nts, we rese rve the r ight to make de sign chan ges.

EUROPE (EM EA): +44 ( 0)1582 723633 THE AMER ICAS: [phone] ASIA-PACIF IC: [phone]

[e-mail] [e-mail] [e-mail] 901-116 Rev H 280110