# Choke, Common Mode, 10 uH, 0.15 ohm
**URL**: https://novapart.co/products/HPF2187LC/choke-common-mode-10-uh-015-ohm
**SKU**: HPF2187LC
**Manufacturer**: COILCRAFT
**Category**: Passive Components || EMC / RFI Suppression || Common Mode Chokes / Filters || SMD Common Mode Chokes / Filters
**Price**: €1.5600
**Stock**: 10+
## Specifications
| Parameter | Value |
|---|---|
| Svhc | No SVHC (12-Jan-2017) |
| Impedance | - |
| Inductance | 10µH |
| Product Range | - |
| Product Width | 5.5mm |
| Qualification | - |
| Product Height | 3.5mm |
| Product Length | 7.8mm |
| Dc Current Rating | - |
| Dc Resistance Max | 0.15ohm |
| Operating Temperature Max | 85°C |
| Operating Temperature Min | -40°C |
## Datasheet
📄 [Download PDF](https://novapart.co/datasheet/farnell:3499906/)
Document 489 -1
## **High Power PoE Signal Path Magnetics**
- Meets the current requirements of Gigabit PoE Plus.
- Open circuit inductance is ≥350 µH with a 22.5 mA dc offset
## **Core material** Ferrite
**Terminations** RoHS Tin-silver-copper over tin over nickel over phos bronze. Other terminations available at additional cost.
**Weight HPF2187L:** 240 mg; **HPX2126L:** 3.9 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)** 38 per billion hours / 26,315,789 hours, calculated per Telcordia SR-332 **Packaging**
**HPF2187L:** 500/7″ reel; 2000/13″ reel; Plastic tape: 16 mm wide, 0.35 mm thick, 8 mm pocket spacing, 4.4 mm pocket depth **HPX2126L:** 300/13″ reel; Plastic tape: 32 mm wide, 0.5 mm thick, 20 mm pocket spacing, 11 mm pocket depth
**PCB washing** Tested to MIL-STD-202 Method 215 plus an additional aqueous wash. See Doc787_PCB_Washing.pdf.
## **Isolation Transformer**
|**Part**
**Inductance**2|**Part**
**Inductance**2|**DCR max**3|**Isolation**4|**Irms**5|
|---|---|---|---|---|
|**number**1|**(µH)**|**(Ohms)**|**(Vrms)**|**(A)**|
|HPX2126L_|850|0.24|1500|1.9|
1. When ordering, please specify **packaging** code: |
**HPX2126LD**
- **Packaging: D** = 13″ machine-ready reel. EIA-481 embossed plastic tape (300 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.
2. Inductance measured at 100 kHz, 0.1 Vrms, 0 Adc.
3. DCR is for each winding.
4. Isolation is measured from primary to secondary of each transformer.
5. Current flowing through each secondary that causes a 20°C temperature rise from 25°C ambient
6. Electrical specifications at 25°C.
Refer to Doc 362 “Soldering Surface Mount Components” before soldering.
## **Common Mode Choke**
|**Part**|**Inductance**2|**DCR max**3|
|---|---|---|
|**number**1|**(µH)**|**(Ohms)**|
|HPF2187L_|10.0|0.15|
1. When ordering, please specify **packaging** code:
- |
- **HPF2187LC**
- **Packaging: C** = 7″ machine-ready reel. EIA-481 embossed plastic tape (500 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 C instead.
- **D** = 13″ machine-ready reel. EIA-481 embossed plastic tape. Factory order only, not stocked (2000 parts per full reel).
2. Inductance measured at 100 kHz, 0.1 Vrms, 0 Adc.
3. DCR is for each winding.
4. Electrical specifications at 25°C.
Refer to Doc 362 “Soldering Surface Mount Components” before soldering.
**US** +1-847-639-6400 sales@coilcraft.com **UK** +44-1236-730595 sales@coilcraft-europe.com **Taiwan** +886-2-2264 3646 sales@coilcraft.com.tw **China** +86-21-6218 8074 sales@coilcraft.com.cn **Singapore** + 65-6484 8412 sales@coilcraft.com.sg
Document 489-1 Revised 11/01/17
© Coilcraft Inc. 2017 This product may not be used in medical or high risk applications without prior Coilcraft approval. Specification subject to change without notice. Please check web site for latest information.
Document 489-2
## **High Power PoE Signal Path Magnetics**
**==> picture [461 x 201] intentionally omitted <==**
**----- Start of picture text -----**
Isolation transformer Common mode choke
HPX2126L HPF2187L
1 12 1 8
TX+ TX+
C1 C2 C3
Note 1 33 pF 8 pF
2 11 2 7
TX– TX–
3 10
TXCT TXCT
4 9
RXCT RXCT
5 8 3 6
RX+ RX+
C4 C5 C6
8 pF 33 pF 8 pF
6 7 4 5
RX– RX–
Cable side
Chipset side
**----- End of picture text -----**
Note 1. C1 = 8 pF minus the output capacitance of the chipset
## **Isolation Transformer HPX2126L**
## **Common Mode Choke HPF2187L**
**==> picture [507 x 316] intentionally omitted <==**
**----- Start of picture text -----**
0.050 Notch indicates pin 1
6 Dot indicates pin 1 1 6 1,27 1
1 8
0.217 ±0.006 HPF
5,50 ±0,15 2187L HPF2187L
4 5 XX
Current production part marking Previous production part marking
0.720 max Recommended 0.560 0.307 ±0.008
18,29 Land Pattern 14,22 7,80 ±0,20
0.138 ±0.008
3,50 ±0,20
0.007/0,18
0.317 ±0.012
8,05 ±0,30
7 12 7 12
0.110 0.080 0.236* 0.0395*
2,76 [cen] 2,03 6,00 1,00 0.012
0.620 max 4 5 0.024 0,305
15.75
0,60
0.050
1 8 1,27 [cen]
0.098
0.425 max * Dimensions are typical prior to applying solder 2,50
10,80
Recommended
Land Pattern
1
0.050 8
1,27 [cen]
0.030
0,76 4 5
Dimensions are in [inches ] mm 0.2005,08 01,52.060
Dimensions are in [inches ]
mm
**----- End of picture text -----**
**==> picture [117 x 44] intentionally omitted <==**
Document 489-2 Revised 11/01/17
© Coilcraft Inc. 2017 This product may not be used in medical or high risk applications without prior Coilcraft approval. Specification subject to change without notice. Please check web site for latest information.
**US** +1-847-639-6400 sales@coilcraft.com **UK** +44-1236-730595 sales@coilcraft-europe.com **Taiwan** +886-2-2264 3646 sales@coilcraft.com.tw **China** +86-21-6218 8074 sales@coilcraft.com.cn **Singapore** + 65-6484 8412 sales@coilcraft.com.sg
Document 489-3
## **High Power PoE Signal Path Magnetics**
## **Description**
Coilcraft’s signal path magnetics meet the current requirements of Gigabit Ethernet PoE Plus. The open circuit inductance is ≥350 µH with a 38 mA dc offset applied from 0°C to 70°C. It can handle 3.8 A of injected current.
The system comprises an isolation transformer, a common mode choke and six capacitors. The capacitor across the primary of the isolation transformer on the TX side tunes the circuit by matching the output capacitance of the chipset allowing these components to be used with virtually all chipsets.
The two isolation transformers are placed in a single package (HPX2126L) and both common mode chokes in an even smaller package (HPF2187L). Both packages fit easily behind a standard Ethernet jack.
## **Testing**
A matching network is used to perform the testing for return loss, insertion loss, crosstalk, common mode to common mode rejection and differential to common mode rejection. The network matches the 50 Ohm single ended connection of network analyzers to 100 Ohm differential balanced lines. A 1:1 balun is used with a resistive network to transform the impedance. The network is then calibrated out of the measurement by using open, short,
load calibration techniques. The circuit is then placed behind the matching network for each of the tests. All tests are performed on an Agilent/HP 8753ES network analyzer.
For return loss, the chip side of the component is loaded with 100 Ohms and the cable side of the system is tested using the matching network.
For insertion loss, the fixture used for the return loss is altered to replace the 100 Ohm load with a matching network for the output port of the network analyzer.
For common mode to common mode rejection, TX+ and TX– (or RX+ and RX–), depending on the side of the system) is tied together and an S21 measurement is taken from chip side to cable side.
For differential to common mode rejection, the chip side of the system is excited by the network analyzer through the matching network. The measurement is taken by looking at the balance between two 50 Ohm loads across the cable side of the system.
For crosstalk, the chip side TX is excited by the network analyzer through the matching network. The center-tap on the chip side of each isolation transformer is grounded, and the chip side RX is measured. The cable side of both RX and TX is externally loaded 100 Ohms.
## **Return Loss**
**==> picture [242 x 183] intentionally omitted <==**
**----- Start of picture text -----**
0
10
20
30
40
50
60
70
80
90
100
1 10 100 1000
Frequency (MHz)
Return Loss (dB)
**----- End of picture text -----**
802.3af specification: 18 dB min from 1 MHz to 40 MHz 16 dB min at 50 MHz 12 dB min at 80 MHz
## **Insertion Loss**
**==> picture [243 x 207] intentionally omitted <==**
**----- Start of picture text -----**
0
10
20
30
40
50
60
70
80
90
100
1 10 100 1000
Frequency (MHz)
802.3af specification:
1.0 min dB from 0.1 MHz to 100 MHz
Insertion Loss (dB)
**----- End of picture text -----**
**==> picture [82 x 7] intentionally omitted <==**
**----- Start of picture text -----**
1.2 min dB at 125 MHz
**----- End of picture text -----**
10 dB min at 100 MHz
**==> picture [117 x 44] intentionally omitted <==**
Document 489-3 Revised 11/01/17
**US** +1-847-639-6400 sales@coilcraft.com **UK** +44-1236-730595 sales@coilcraft-europe.com **Taiwan** +886-2-2264 3646 sales@coilcraft.com.tw **China** +86-21-6218 8074 sales@coilcraft.com.cn **Singapore** + 65-6484 8412 sales@coilcraft.com.sg
© Coilcraft Inc. 2017 This product may not be used in medical or high risk applications without prior Coilcraft approval. Specification subject to change without notice. Please check web site for latest information.
Document 489-4
## **High Power PoE Signal Path Magnetics**
## **Common Mode Rejection**
**==> picture [242 x 183] intentionally omitted <==**
**----- Start of picture text -----**
0
10
20
30
40
50
60
70
80
90
100
1 10 100 1000
Frequency (MHz)
Common Mode Rejection (dB)
**----- End of picture text -----**
802.3af specification:
50 dB min from 1 MHz to 10 MHz
30 dB min from 10 MHz to 125 MHz
20 dB min from 125 MHz to 500 MHz
## **Differential to Common Mode Rejection**
**==> picture [242 x 185] intentionally omitted <==**
**----- Start of picture text -----**
0
10
20
30
40
50
60
70
80
90
100
1 10 100 1000
Frequency (MHz)
Differential to Common Mode Rejection (dB)
**----- End of picture text -----**
802.3af specification:
45 dB min at 30 MHz
40 dB min at 60 MHz
35 dB min at 100 MHz
## **Crosstalk**
**==> picture [242 x 183] intentionally omitted <==**
**----- Start of picture text -----**
0
10
20
30
40
50
60
70
80
90
100
1 10 100 1000
Frequency (MHz)
Crosstalk (dB)
**----- End of picture text -----**
## **L vs Offset Current – HPX2126L**
**==> picture [243 x 183] intentionally omitted <==**
**----- Start of picture text -----**
1400
1200
1000
800
600
400
85°C 70°C 25°C
200
0
0 10 20 30 40 50 60
Current (mA)
Inductance (µH)
**----- End of picture text -----**
802.3af specification:
45 dB min at 30 MHz 40 dB min at 60 MHz 33 dB min at 100 MHz
**==> picture [117 x 44] intentionally omitted <==**
Document 489-4 Revised 11/01/17
**US** +1-847-639-6400 sales@coilcraft.com **UK** +44-1236-730595 sales@coilcraft-europe.com **Taiwan** +886-2-2264 3646 sales@coilcraft.com.tw **China** +86-21-6218 8074 sales@coilcraft.com.cn **Singapore** + 65-6484 8412 sales@coilcraft.com.sg
© Coilcraft Inc. 2017 This product may not be used in medical or high risk applications without prior Coilcraft approval. Specification subject to change without notice. Please check web site for latest information.
## Links
- [View this product on Novapart](https://novapart.co/products/HPF2187LC/choke-common-mode-10-uh-015-ohm)
- [Request a quote for this part](https://novapart.co/quote/)
- [Supplier page](https://es.farnell.com/coilcraft/hpf2187lc/common-mode-choke-10uh-smt/dp/3499906)
---
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