HEMP Telephone Line Range

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.

Insertion Loss Performance

Part Number	Number of Lines	Length	Width	Depth	Weight Approx (kg)
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

Rated Voltage

295Vac / 125Vdc

Test Voltage

1250Vdc each line to case (Prior to fitting transient suppressors)

Rated Current

125mA (300mA with slight performance derating)

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 (8/20s) (E1 only versions)
40kA (8/20s) (E1 + E2 versions)

Insertion Loss in 50Ω system

See graph

Pass Band (300Ω)

0 – 4kHz

All MPE installation 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-F-15733
Mil-Std-220C
CISPR17:2011/BS EN 55017:2011
UL1283
LVD 2014/35/EU
DEF-STAN 59-411/MIL-STD-461
RoHS (2011/65/EU) & LVD (2014/35/EU)
USACE 13.27.54.01
UFGS 13.49.20.01
UKCA & CE
MIL-STD-188-125-1&-2
DEF STAN 59-188-1&-2

DS XXXXX / X

Filter Part Number
Suffix C for standard cable entry
For other cable entries, see Installation Details page

e.g. DS33575#

HEMP Telephone Line Filters - Issue 9

DS XXXXX / X

Filter Part Number
Suffix C for standard cable entry
For other cable entries, see Installation Details page

e.g. DS33575#