Datasheet 3D Model

ST448RFT Series

SMT 4.5

ST448RFT Series offers exceptional common mode noise attenuation.

Current-compensated ring core double choke.
Miniature footprint; less than 5 mm tall.
250 Vrms, one minute isolation (hipot) between windings.
RoHS compliant matte tin over nickel over phos-bronze terminations.

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Specifications

Part number 1	Lines	Common mode peak impedance (kΩ)	Cutoff frequency (kHz)	Inductance min (mH) 2	Leakage Inductance max (µH)	Irms (mA) 3	DCR max (Ω) 4	Isolation Voltage (Vrms)
Part number 1	Lines	Common mode peak impedance (kΩ)	Cutoff frequency (kHz)	Inductance min (mH) 2	Leakage Inductance max (µH)	Irms (mA) 3	DCR max (Ω) 4	Isolation Voltage (Vrms)
ST448RFT513BLZ	2	2.01 @ 61.0 MHz	670	0.036	0.100	370	0.320	250
ST448RFT513SLZ	2	1.92 @ 99.0 MHz	28.0	0.036	1.600	370	0.320	250
ST448RFT104BLZ	2	0.64 @ 9.7 MHz	900	0.070	0.070	500	0.200	250
ST448RFT224BLZ	2	1.40 @ 13.0 MHz	650	0.154	0.080	400	0.270	250
ST448RFT334BLZ	2	1.96 @ 9.6 MHz	520	0.231	0.100	370	0.320	250
ST448RFT474BLZ	2	3.04 @ 9.6 MHz	490	0.329	0.130	350	0.380	250

Notes

When ordering, please specify testing code: e.g. ST448RFT474BLZ.
Inductance is for each winding, measured at test frequency using a Voltech AT3600 or equivalent.
Current that causes a 20°C temperature rise from 25°C ambient.
DCR is specified per winding.

Termination:

L= RoHS compliant matte tin over nickel over phos-bronze

Testing:

Z = Unscreened
H = Group A screening per Coilcraft CP-SA-10001

All screening performed to the document’s latest revision.
Custom screening also available.

Environmental

Ambient temperature range:

–40°C to +85°C with Irms current.

Storage temperature range:

Component: –55°C to +105°C.
Tape and reel packaging: –40°C to +80°C.

Maximum part temperature:

+105°C (ambient + temp rise).

Failures in Time (FIT) / Mean Time Between Failures (MTBF):

See FIT/MTBF Calculations

Performance curves

Attenuation vs Frequency - Differential Mode

Attenuation vs Frequency - Common Mode

Impedance vs Frequency - Differential Mode

Impedance vs Frequency - Common Mode

Physical characteristics

General specification

Core Material:

Ferrite

Weight:

78 – 86 mg

Packaging:

600/7″ reel Plastic tape: 12 mm wide, 0.4 mm thick, 8 mm pocket spacing, 3.43 mm pocket depth.

Soldering/Washing

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.