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XAL7050 High-inductance Shielded Power Inductors
XGL4020 Ultra-low DCR Power Inductors

JA4641 Flyback Transformer

for Silicon Laboratories Si3402 PD Controller

RoHS compliant
  • Developed for Silicon Laboratories Si3402 PD Controller up to 15 W
  • Designed to operate in continuous mode at 250 kHz
  • 36 – 72 Vdc input
  • AEC-Q200 Grade 3 (−40°C to +85°C)

Buy Now:
Count Unit price
1 $3.49
175 $2.99
700 $2.61
1400 $2.03
2800 $1.74
5000 $1.58

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

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

Typical Application

Works with Skyworks Si3402

Input Voltage Output Power Fsw
36 V 72 V 24 V , 0.63 A 15 W 250 kHz


Electrical specifications at 25°C.

Part number
(Hover for schematics)
at 0A (µH) 1
(Tolerance: ±10%)
min at   2 A (µH)
DCR max (Ω) Leakage
max (µH) 2
Turns Ratio Isolation
Voltage (Vrms) 3
Pri Sec Pri : Sec
JA4641-AL_ 40 36 0.100 0.275 0.56 1 : 2 1500
  1. Inductance is for the primary, measured at 200 kHz, 0.2 Vrms, 0 Adc
  2. Leakage inductance is for the primary, measured with secondary windings shorted together.
  3. 1500 Vrms, one minute isolation (hipot) between primary and secondary.


  • RoHS-compliant. 260°C compatible. Tin-silver over tin over nickel over phos bronze terminations Other terminations available at additional cost.


  • D = 13″ machine-ready reel. EIA-481 embossed plastic tape (175 parts per full reel). Quantities less than full reel available: in tape (not machine ready) or with leader and trailer ($25 charge).
RoHS compliant
Ambient temperature range:
–40°C to +85°C
Storage temperature range:
Component: −40°C to +125°C
Tape and reel packaging: −40°C to +80°C
Failures in Time (FIT) / Mean Time Between Failures (MTBF):


Connect pin 7 to 8 and pin 9 to 10 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_f.gif
175 330 100 13 38,4 32,4 32 28 4 2 13,4 0,60

General specification

Core Material:
6.79 g
175 per 13″ reel Plastic tape: 32 mm wide, 0.6 mm thick, 28 mm pocket spacing, 13.4 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.