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Cx Family Common Mode Chokes
0402CT Low Profile Chip Inductors
XAL7050 High-inductance Shielded Power Inductors
XGL4020 Ultra-low DCR Power Inductors

C1023 PoE Transformer

for TI LM5070 PoE Interface

RoHS compliant
  • Developed for the TI LM5070 PD Interface in 13 W applications
  • Operates at frequencies up to 1 MHz
  • RoHS-compliant  260°C compatible. Tin-silver-copper over tin over nickel over phos bronze terminations
Buy Now:
Count Unit price
1 $4.23
175 $3.62
700 $3.15
1400 $2.74
2800 $2.35
5000 $2.16

For high volume or non-stock items, request a quote.

. in stock, ready to ship today.
Request a Sample:

Typical Application

Works with Texas Instruments LM5070

Input Voltage Output Power Fsw
36 V 72 V 3.3 V , 4.5 A 15 W 1000 kHz


Electrical specifications at 25°C.

Part number 1
(Hover for schematics)
at 0A (µH) 2
(Tolerance: ±10%)
min at   1.5 A (µH)
DCR max (Ω) 3 Leakage
max (µH) 4
Turns Ratio 5 Isolation
Voltage (Vrms) 6
Pri Sec Bias Pri : Sec : Bias
C1023-AL_ 110 99 0.139 0.016 0.656 1.4 1 : 0.19 : 0.69 1500
  1. When ordering, please specify packaging code: e.g. C1023-ALD
  2. Inductance is for the primary, measured at 10 kHz, 0.1 Vrms, 0 Adc.
  3. DCR for the secondary is per winding.
  4. Leakage inductance is for the primary winding with all other pins shorted.
  5. Turns ratio is with the secondary windings connected in parallel.
  6. 1500 Vrms, one minute isolation (hipot). Isolation is measured from the primary and aux to the secondary.


  • RoHS tin-silver (96.5/3.5) over tin over nickel over phos bronze. Other terminations available at additional cost.


  • D = 13" machine-ready reel
    EIA 481 embossed plastic tape (175 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.
RoHS compliant
Ambient temperature range:
–40°C to +85°C
Storage temperature range:
Component: –40°C to +85°C
Tape and reel packaging: –40°C to +80°C
Failures in Time (FIT) / Mean Time Between Failures (MTBF):



Secondary windings to be connected
in parallel on the PC board.

Physical characteristics



Tape and Reel specification


Parts per reel Reel dimensions (mm) Tape dimensions (mm) Orientation
13" (330 mm) A B C D E W P Po P1 H T part_or_c.gif
175 330 100 13 50,4 44,4 44 32 4 2 11,9 0,4

General specification

Core Material:
12.4 g
175 per 13″ reel Plastic tape: 44 mm wide, 0.4 mm thick, 32 mm pocket spacing, 11.9 mm pocket depth


Moisture Sensitivity Level (MSL):
1 (unlimited floor life at <30°C / 85% relative humidity)
Resistance to soldering heat:
Max three 40 second reflows at +260°C, parts cooled to room temperature between cycles
Refer to Soldering Coilcraft Components before soldering.
PCB Washing:
Tested to MIL-STD-202 Method 215 plus an additional aqueous wash. More info.

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