ETALDOC 575/6

Page 1 of  4

January 2001

PRODUCT DATA SHEET

ULTRA LOW DISTORTION

P3176

LINE MATCHING TRANSFORMER

Features

Applications

∗

  Low Cost

∗

  V.90 and V.92 modems

∗

  Low Distortion

∗

  12.6mm (0.5") seated height

∗

  Extended Frequency Response

∗

  IEC 950, UL1950 and EN 60950 certified

∗

  UL Recognized Component

∗

  BABT Certificate of Recognition

∗

  Flat TX and RX Responses

∗

  High Thermal Stability

 
 

 

DESCRIPTION

P3176 is intended for V.90 and V.92 (56kbps)
modems and other high-speed applications where
low distortion at high power levels and very low
voiceband frequencies is required at a competitive
price.

P3176 is mechanically compatible with industry
standard P1200 and P2001 and electrically and
mechanically compatible with P3146.

P3176 has extended flat frequency response from
30Hz to 4kHz with very low levels of signal distortion
at signal frequencies as low as 150Hz.

P3176 also exhibits stable characteristics over its
operating temperature range to  maximize data
throughput under varying environmental
conditions without the need for modem retraining.

P3176 meets international safety standards, being
vacuum encapsulated and 100% tested to
withstand 6.5kV.

P3176 is certified to IEC 950, EN 60950, UL1950,
and EN 41003. P3176 is a UL Recognized
Component and is supported by a BABT
Certificate of Recognition and an IEC CB Test
Certificate.

E203175

to Electronic Techniques

(Anglia) Limited

P3176

ETALDOC 575/6

Page 2 of 4

January 2001

SPECIFICATIONS

Electrical

At T = 25ºC and as circuit Fig. 2 unless otherwise stated.

Parameter

Conditions

Min

Typ

Max

Units

Insertion Loss

f = 2kHz, R

L

 = 510

Ω

-

2.5

-

dB

Frequency Response

LF -3dB cutoff
HF -3dB cutoff
100Hz - 4kHz

-
-
-

10

6

±0.6

-
-
-

Hz

kHz

dB

Return Loss

200Hz - 4kHz

16

-

-

dB

Third Harmonic
Distortion 

(1)

450Hz 0dBm in line
150Hz -3dBm in line

-
-

-85
-78

-
-

dBm
dBm

Saturation

Excitation 50Hz
250Vrms.
Output voltage
across line

-
-

-
-

10
65

Vrms

Vpeak

Voltage
isolation

(2)

50Hz
DC

3.88

5.5

-
-

-
-

kVrms

kV

Operating range:
Functional
Storage

Ambient temperature

-10
-40

-
-

+70

+125

ºC
ºC

Lumped equivalent circuit parameters as Fig. 1

DC resistance, R

DC

(3)

Sum of windings

180

-

220

Ω

Leakage inductance 

∆

L

22.3

-

27.7

mH

Shunt inductance Lp

(4)

-43dBm 200Hz

8.5

11

-

H

Shunt loss Rp

(4)

-43dBm 200Hz

17

25

-

k

Ω

 Notes
1.

Third harmonic typically exceeds other
harmonics by 10dB.

2.

Components are 100% tested at 6.5kV DC.

3.

Caution:  do not pass DC through windings.
Telephone line current, etc. must be diverted
using semiconductor line hold circuit.

4.

At signal levels greater than -20dBm,  Lp will
increase and  Rp will decrease slightly but the
effect is usually favourable to the return loss
characteristic.

Equivalent Circuit

IDEAL

1:1

LINE

EQUIPMENT

Fig 1

P3176

ETALDOC 575/6

Page 3 of 4

January 2001

MATCHING RECOMMENDATIONS

CONSTRUCTION

Dimensions shown are in millimetres (inches).
Geometric centres of outline and pin grid coincide within a tolerance circle of 0.6mmØ.
Windings may be used interchangeably as primary or secondary.

Recommended Circuit

Fig 2

LINE

600

33nF

330

µ

2 2   F

600    MATCH

Ω

EUROPEAN CTR21 COMPLEX MATCH

Recommended Circuit

Fig 3

LINE

270

68nF

100

750

µ

2 2   F

150nF

510

39nF

TX

910

100nF

120

TX

P3176

ETALDOC 575/6

Page 4 of 4

January 2001

SAFETY

CERTIFICATION

Constructed in accordance with IEC 950:1991,
EN60950:1992 (BS7002:1992) to amendment 5,
supplementary insulation, and UL 1950 3rd Edition,
reinforced insulation, 250Vrms maximum working
voltage, flammability class V-0.
Distances through solid insulation 0.4mm
minimum.

Certified under the IEC CB scheme (Certificate
GB445W) to IEC 950:1991, up to amendment 4, sub-
clauses 1.5, 1.5.1, 1.5.3, 2.2, 2.2.2, 2.2.3, 2.2.4, 2.9.2,
2.9.3, 2.9.4, 2.9.6, 2.9.7, 4.4, 4.4.3.2 (class V-0) and
5.3 for a maximum working voltage of 250Vrms,
nominal mains supply voltage not exceeding
300Vrms and a maximum operating temperature of
70ºC in Pollution Degree 2 environments,
supplementary insulation.
Recognized under the Component Recognition
Program of Underwriters Laboratories Inc. to US and
Canadian requirements CAN/CSA C22.2
No. 950-95/UL1950, Third Edition, including revisions
through to revision date March 1, 1998, based on
Fourth Amendment of IEC 950, Second Edition,
maximum working voltage 250Vrms, Pollution Degree
2, reinforced insulation.

UL File number E203175.
Approved and certified by BABT to EN 60950 and
EN 41003.
BABT Certificate of Recognition CR/0136.

Additionally, Profec Technologies certifies all
transformers as providing voltage isolation of
3.88kVrms, 5.5kV DC minimum.   All shipments are
supported by a certificate of conformity to current
applicable safety standards.

ABSOLUTE MAXIMUM RATINGS

COPYRIGHT

(Ratings of components independent of circuit).

Short term isolation voltage (1s)

4.6kVrms,
6.5kVDC

DC current

100

µ

A

Storage temperature

-40ºC to
+125ºC

Lead temperature, 10s

260ºC

ETAL, P3176, P3146, P1200 and P2001 are
Trade Marks of Profec Technologies Ltd.
The  Trade Mark ETAL is registered at the UK
Trade Marks Registry.

Profec Technologies Ltd. is the owner of the
design right under the Copyright Designs and
Patents Act 1988 and no rights or licences are
hereby granted or implied to any third party.

© 1998, 1999 and 2000 Profec Technologies Ltd.
Reproduction prohibited.

T R A N S F O R M I N G    T H E         F U T U R E

Profec Technologies Ltd., 10 Betts Avenue, Martlesham Heath, Ipswich, IP5 3RH, England

                           Telephone: +44 (0) 1473 611422

Fax:  +44 (0) 1473 611919

Websites: www.etal.ltd.uk

www.profec.com

Email:

info@etal.ltd.uk

sales@profec.com

ISO 9001

FM 25326