Telephone Line HEMP & IEMI Filter Range

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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
EN60950/IEC60950

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