Coilcraft FA2469 Flyback Transformers for ST Microelectonics STLC3085 POTS interface
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Flyback Transformer for
STMicro STLC3075 & STLC3085

  • Designed for use with STMicroelectronics STLC3075 & STLC3085 POTS interface
  • Provides negative battery voltage to the microchip
  • Versions for 4.5 – 8.5 V and 8.5 – 12 V inputs
  • 1500 Vdc interwinding isolation
  • RoHS-compliant. Tin-silver over tin over nickel over phos bronze terminations
  • COTS Plus tin-silver-copper and tin-lead terminations available


Part number1
Click to get parts
at 0 A2
±10% (µH)
at Ipk3
min (µH)
DCR max
max (µH)
Turns ratio
pri : sec
voltage (V)
pri       sec     
FA2469-AL_ 19 14.86 0.036 16.5 0.414 1 : 16 1.5 4.5 – 8.5
FA2470-AL_ 19 14.86 0.036 7.92 0.400 1 : 8 1.5 8.5 – 12.0
1 When ordering, please specify termination and packaging codes: e.g. FA2469-ALD
Termination: L = RoHS compliant tin-silver over tin over nickel over phos bronze
Special order, added cost: T = RoHS tin-silver-copper (95.5/4/0.5) or
= non-RoHS tin-lead (63/37).
Packaging: D = 13" reel, machine-ready 
EIA-481 embossed plastic tape (450 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 is for the primary, measured at 10 kHz, 0.1 Vrms, 0 Adc.
3 Ipk is peak primary current drawn at minimum input voltage.
4 DCR measured at 25°C. For other operating temperatures, use this DCR at Temperature calculator.
5 Leakage inductance is for the primary with secondary shorted.
6 Ambient temperature range: −40°C to +85°C
7 Storage temperature range: Component: −40°C to +85°C
Tape and reel packaging: −40°C to +80°C
8 Resistance to soldering heat: Three reflows at >217°C for 90 seconds (+260°C ±5°C for 20 – 40 seconds), allowing parts to cool to room temperature between.
9 Electrical specifications at 25°C.
Refer to Soldering Coilcraft Components before soldering.
PCB washing: Tested to MIL-STD-202 Method 215 plus an additional aqueous wash. More info

Your comments and suggestions are welcome. Contact [email protected]
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Updated: April 16, 2018