MPE
MPE Limited
Hammond Road
Knowsley Industrial Park Liverpool
L33 7UL
Contact
T: +44 (0)151 632 9100
E: sales@mpe.co.uk

Telephone Line HEMP & IEMI Filter Range

MPE HEMP Prot Telephone Line A

DESCRIPTION

A range of HEMP protection filters for telephone lines for use on HEMP protected installations meeting E1 (short pulse) pci requirements of MIL-STD -188-125-1 & -2. All lines are individually filtered and feature inductive input to offer both good continuous wave EMC performance and superior transient handling performance. All lines feature high-energy varistor transient suppressors at the input end.

All MPE HEMP filters are tested using the test methods defined within the following standards and meet or exceed the relevant performance and/or safety criteria defined within these standards:

Mil-Std-188-125
Mil-F-15733
Mil-Std-220C
CISPR17:2011/BS EN 55017:2011
UL1283
LVD 2014/35/EU

FEATURES

  • Use on 300Ω/600Ω analogue telephone circuits
  • Circuits supplied as high symmetry matched pairs

RATINGS & CHARACTERISTICS

Rated Voltage
95Vac / 125Vdc
Test Voltage
1250Vdc each line to case(Prior to fitting transient suppressors)
Rated Current
125mA
Insulation Resistance
>100MΩ (Prior to fitting transient suppressors)
DC Resistance
9Ω
Impedance line-earth
300Ω
Impedance line-line
600Ω
Full Load Operating Temperature Range
-40ºC to +50ºC
Peak Surge Current
6.5kA (8/20μs)

INSERTION LOSS PERFORMANCE

Typical insertion loss In 50Ω system with / without load
Frequency 10kHz 100kHz 1MHz 10MHz 100MHz 1GHz
Insertion loss (50Ω) 70dB 100dB 100dB 100dB 100dB 100dB
100dB insertion loss performance 100dB from 20kHz – >1GHz
Pass Band (300Ω) 0 – 4kHz

TRANSIENT SUPPRESSION PERFORMANCE

MIL STD 188-125-1 acceptance test, short pulse current injection, wave shape 20/500ns
Input pulse amplitude 250A 500A 1000A 1800A 2500A
MIL-STD-188-125 residual requirement <0.1A <0.1A <0.1A <0.1A <0.1A
Typical filter residual let-through <0.06A <0.06A <0.06A <0.06A <0.06A

PRODUCT RANGE (E1 Only)

Part Number No of Lines Major Dimensions (mm) Weight Approx (kg)
Length Width Depth
DS33570 2 300 90 45 2
DS33571 4 300 175 45 4
DS33572 8 300 340 45 8
DS33573 32 547 200 143 17
DS33575 100 730 600 250 60

* Note: Lines are supplied as matched pairs, hence 1 telephone circuit = 1 matched pair = 2 lines

DIMENSIONS & MECHANICAL DETAILS

No Of Lines Dimensions (mm)
A B C D
2 90 46 22 45
4 175 100 37.5 87.5
8 340 250 45 170
Case Material
Electroplated steel
Finish
Paint (except base)
Terminals
M3 screw terminals

PRODUCT RANGE (E1 & E2)

Part Number No of Lines Major Dimensions (mm) Weight Approx (kg)
Length Width Depth
DS33890 2 345 100 75 3.5
DS33891 4 345 185 75 6
DS33892 8 345 350 75 12
DS33582 16 420 340 75 17
DS33893 40 730 620 250 40
DS33894 60 730 620 250 58
DS33575 100 730 1000 250 90

DIMENSIONS & MECHANICAL DETAILS

No Of Lines Dimensions (mm)
A B C D
2 100 50 25 50
4 185 135 25 92.5
8 350 250 50 175