DEC 6 | 200 Ohm Signal-Line Decoupling

DEC 6 - 6.6 kV Decoupling Network for Symmetrical Lines

200 ohm resistors for symmetrical signal-line testing.

The Haefely DEC 6 separates auxiliary equipment from an EUT during transient immunity testing on unshielded symmetrical lines. It supports up to four wires and impulses up to 6.6 kV, using 200 ohm resistors. Coupling is performed by a separate network, allowing protection and decoupling to match the signal circuit.

PARTNER:

HAEFELY EMC

MARKETS:

CATEGORIES:

TEST STANDARDS:

Select Options/Sizes:

DEC 6 Datasheet V2026.06

SPECIFICATIONS

HAEFELY EMC ACCESSORIES

DEC 6 - 6.6 kV Decoupling Network for Symmetrical Lines

200 ohm resistors for symmetrical signal-line testing.

Overview and application

Manual protection selection makes the connected protection elements visible.
The decoupling network does not generate or couple the test impulse; use it with a suitable coupling network and generator.
Select EUT voltage, current and signal bandwidth together; the decoupling path can affect normal communication.
Manufacturer-listed coupling networks: PCD 120, PCD 122 and PCD 800. Other decoupling elements are available on request.
Applications include telecommunication equipment and symmetrical data/control-line surge testing, including TIA 968 A (FCC Part 68) test contexts.

Bandwidth needs configuration confirmation: V2026.06 lists some 10 MHz in Features and some 100 MHz in Technical Data. The comparison therefore does not use a single guaranteed bandwidth.

Technical specifications

Specification	Details
Function	Decoupling and auxiliary-equipment protection; coupling supplied separately
Line type / capacity	Unshielded symmetrical data and control lines; up to 4 wires
Supported impulse shapes	1.2/50 us - 8/20 us combination wave; 100 kHz ring wave; 10/700 us - 5/320 us telecom wave
Maximum impulse amplitude	6.6 kV peak
Decoupling elements	200 ohm resistors
Protection elements	Gas arrestors and avalanche breakdown diodes (ABDs)
Protection selection	Manual; operation without protection elements is also possible
EUT voltage with gas arrestors	Maximum 72 V DC or 50 V AC RMS
EUT voltage with ABDs	Maximum 144 V DC or 100 V AC RMS
Maximum EUT line current	0.1 A
EUT signal bandwidth	Technical table: up to some 100 MHz; feature list and webpage: some 10 MHz. Confirm for the intended signal.
Connections	Safety banana sockets
Dimensions (W x D x H)	300 x 160 x 200 mm (11.8 x 6.3 x 7.9 in)
Weight	Approximately 2 kg net (4.4 lb)

Included components

DEC 6 decoupling network
Cable set
Four short-circuit bridges
User manual

Generator, EUT, auxiliary equipment and other coupling/decoupling networks are separate system equipment unless explicitly included above.

Standards and system configuration

IEC/EN 61000-4-5 Edition 1 Figure 12 and Edition 2 Figure 14; IEC/EN 61000-4-12 Edition 2 Figure 12. The manufacturer states these listed requirements are exceeded; no later-edition claim is added here.
ITU K.44:2003 Figures A.5-1 and A.6.1-1 through A.6.1-5.

Compare data-line coupling and decoupling networks

Product	Function	Signal circuit	Test waveform	Key ratings
PCD 121	Coupling	Symmetrical; 2 pairs / 4 wires	Combination wave	6.6 kV; selectable gas arrestor / ABD coupling
PCD 126A	Coupling	4 wires; asymmetrical surge; symmetrical or asymmetrical ring wave	Combination wave; 100 kHz ring wave	6.6 kV; capacitors, ABDs, gas arrestors or direct
DEC 5	Decoupling	Symmetrical; 4 wires	Combination, telecom and ring wave	6.6 kV; 20 mH compensated; 1 A
DEC 6	Decoupling	Symmetrical; 4 wires	Combination, telecom and ring wave	6.6 kV; 200 ohm; 0.1 A
DEC 7	Decoupling	Asymmetrical; 4 wires	Combination and ring wave	6.6 kV; 20 mH uncompensated; 1.5 A
PCD-1000-4	Coupling + decoupling	Balanced Ethernet; 1 / 2 / 4 pairs; 1000Base-T	Combination wave	4 kV / 150 A surge; 65 V DC / 1 A line; IEEE 802.3af PoE

Combination wave: 1.2/50 us voltage and 8/20 us current. Telecom wave: 10/700 us voltage and 5/320 us current. Ratings depend on the selected coupling/protection elements; review each product specification before configuring the system.

PCD 121 and PCD 126A provide coupling only. DEC 5, DEC 6 and DEC 7 provide decoupling/protection only. PCD-1000-4 combines both functions for high-speed Ethernet. IP4B is an EFT/burst clamp and is intentionally excluded from this matrix.