Datasheet 3D Model

ST358PWA Series

Power Inductor for Critical Applications

ST358PWA Series offers extremely low DCR and very high SRF ratings.

Miniature shielded power inductors; 2.0 × 2.0 mm footprint.
Isat ratings as high as 2.8 A.
Tin-silver-copper over tin over nickel over silver terminations.

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Specifications

Electrical specifications at 25°C.

Part number 1	Inductance (µH) 2 (Tolerance: ±20%)	DCR (Ω) 3		SRF typ (MHz) 4	Isat (A) 5			Irms (A) 6
Part number 1	Inductance (µH) 2 (Tolerance: ±20%)	typ	max	SRF typ (MHz) 4	10% drop	20% drop	30% drop	20°C rise	40°C rise
ST358PWA271MLZ	0.27	0.030	0.036	570	1.5	2.3	2.8	2.04	2.73
ST358PWA421MLZ	0.42	0.037	0.044	438	1.4	2.0	2.4	1.93	2.57
ST358PWA601MLZ	0.60	0.043	0.052	290	1.2	1.8	2.3	1.83	2.43
ST358PWA821MLZ	0.82	0.051	0.061	163	0.95	1.4	1.8	1.49	2.03
ST358PWA102MLZ	1.0	0.059	0.071	153	0.90	1.3	1.7	1.43	1.94
ST358PWA152MLZ	1.5	0.075	0.086	109	0.72	1.2	1.6	1.34	1.86
ST358PWA222MLZ	2.2	0.120	0.132	80	0.60	0.98	1.3	1.07	1.42
ST358PWA332MLZ	3.3	0.152	0.167	62	0.54	0.80	1.1	0.92	1.23
ST358PWA472MLZ	4.7	0.231	0.254	46	0.38	0.65	0.88	0.79	1.06
ST358PWA682MLZ	6.8	0.287	0.316	44	0.35	0.59	0.80	0.68	0.92
ST358PWA822MLZ	8.2	0.378	0.416	39	0.29	0.50	0.68	0.64	0.85
ST358PWA103MLZ	10	0.440	0.459	33	0.25	0.45	0.60	0.56	0.73

Notes

When ordering, please specify screening code: e.g. ST358PWA103MLZ.
Inductance tested at 100 kHz, 0.1 Vrms, 0 Adc.
DCR measured on a micro-ohmmeter.
SRF measured using Agilent/HP 4395A network analyzer or equivalent.
DC current at which the inductance drops from its value without current.
Current that causes the specified temperature rise from 25°C ambient.

Screening:

Z = Unscreened
Y = Unscreened (SLDC Option A)
W = Unscreened (SLDC Option B)
H = Group A screening per Coilcraft CP-SA-10001
G= Coilcraft CP-SA-10001 Group A (SLDC Option A)
D = Coilcraft CP-SA-10001 Group A (SLDC Option B)

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 +125°C.
Packaging: –55°C to +80°C.

Maximum part temperature:

+125°C (ambient + temp rise).

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

See FIT/MTBF Calculations

Performance curves

Typical L vs Frequency

Typical L vs Current

Physical characteristics

Dimensions are in inches / mm

Small surface blemishes are not unusual and do not adversely affect performance.
Wire may be visible inside the voids.
Acceptable void sizes:
Top: 0.01 in / 0,254 mm × 0.01 in / 0,254 mm
Sides: 0.02 in / 0,5 mm × 0.047 in / 1,2 mm

Part marking

Part number	Value	1st digit	2nd digit	Multiplier
ST358PWA-271	0.27 µH	Red	Violet	Brown
ST358PWA-421	0.42 µH	Yellow	Red	Brown
ST358PWA-601	0.60 µH	Blue	Black	Brown
ST358PWA-821	0.82 µH	Gray	Red	Brown
ST358PWA-102	1.0 µH	Brown	Black	Red
ST358PWA-152	1.5 µH	Brown	Green	Red
ST358PWA-222	2.2 µH	Red	Red	Red
ST358PWA-332	3.3 µH	Orange	Orange	Red
ST358PWA-472	4.7 µH	Yellow	Violet	Red
ST358PWA-682	6.8 µH	Blue	Gray	Red
ST358PWA-822	8.2 µH	Gray	Red	Red
ST358PWA-103	10 µH	Brown	Black	Orange

Note: All marked parts have three dots. Black dot, used only on -601, -102 and -103 as second significant digit, may be very difficult to see.

General specification

Core Material:

Ferrite

Weight:

20 – 25 mg

Packaging:

2000/7′′ reel; 7500/13′′ reel Plastic tape: 8 mm wide, 0.28 mm thick, 4 mm pocket spacing, 1.65 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.