ETH1-460

Document 1008-1
“PoE Plus” Magnetics – ETH1-460
The ETH1-460L_1 is developed for high power PoE applications in support of the goals of the IEEE 802.3at-2009
standard. This module is designed for 4-pair cabling plants
at 60 Watts. It exceeds the return loss requirements of
Gbit Ethernet.
This single component solution may be used in place of
two ETH1-230 parts, saving valuable board space.
It has a minimum open-circuit inductance of 350 µH at an
offset current of 35 mA at 25°C ambient temperature, and
can handle 22.5 mA minimum dc offset at 85°C. Typical
temperature rise from 25°C ambient is 7°C with 800 mA
and 10°C with 1000 mA dc current applied to one center
tap of each isolation transformer. Winding to winding isolation is 1500 Vrms. Ambient temperature range: –40°C to
+85°C with 1 A current.
1. When ordering, please specify packaging code:
ETH1-460LD
Core material Ferrite
Terminations RoHS compliant tin-silver-copper over tin over nickel
over phos bronze
Weight 3.6 g
Ambient temperature –40°C to +85°C
Storage temperature Component: –40°C to +85°C.
Tape and reel packaging: –40°C to +80°C
Resistance to soldering heat Max three 40 second reflows at
+260°C, parts cooled to room temperature between cycles
Moisture Sensitivity Level (MSL) 1 (unlimited floor life at <30°C /
85% relative humidity)
Failures in Time (FIT) / Mean Time Between Failures (MTBF)
60 per billion hours / 16,666,667 hours, calculated per Telcordia SR-332
Packaging 250/13″ reel; Plastic tape: 32 mm wide, 0.5 mm thick,
24 mm pocket spacing, 10.6 mm pocket depth
PCB washing Tested to MIL-STD-202 Method 215 plus an additional
aqueous wash. See Doc787_PCB_Washing.pdf.
Packaging:D
=13″ machine-ready reel. EIA-481 embossed plastic tape.
Factory order only, not stocked (250 parts per full reel).
B= Less than full reel. In tape, but not machine ready.
To have a leader and trailer added ($25 charge), use
code letter D instead.
Dimensions are in
inches
mm
Document 1008-1 Revised 10/09/12
Document 1008-2
“PoE Plus” Magnetics – ETH1-460
Return Loss
0
0
10
10
20
20
30
30
Return Loss (dB)
40
50
60
70
40
50
60
70
80
80
90
90
100
100
1
10
100
1000
Frequency (MHz)
1
10
L vs Offset Current
TXCT
1200
TX+
24
23
1
2
3
800
TX–
RXCT
600
RX+
70°C
200
0
5
10
15
20
25
Current (mA)
30
35
40
TX+
TX–
22
21
20
4
1:1
5
25°C
Chipset or cable side
85°C
400
TXCT
1:1
1000
Inductance (µH)
1000
802.3af specification:
18 dB min from 1 MHz to 40 MHz
16 dB min at 50 MHz
12 dB min at 80 MHz
10 dB min at 100 MHz
802.3af specification:
1.0 min dB from 0.1 MHz to 100 MHz
1.2 min dB at 125 MHz
0
100
Frequency (MHz)
6
RXCT
RX+
RX–
RX– 19
TXCT
TX+
7
18
17
8
9
TX–
RXCT
RX+
TXCT
1:1
Cable or chipset side
Insertion Loss (dB)
Insertion Loss
TX+
TX–
16
10
15
14
1:1
11
12
RXCT
RX+
RX–
RX– 13
Document 1008-2 Revised 10/09/12