7ꢀ7ꢀPOWERINDUCTORS
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High-Reliability Power Inductors ST541PYA
■ High current and very low DCR
■ Soft saturation makes them ideal for VRM/VRD applications.
■ High temperature materials allow operation in ambient
temperatures up to 165°C
Core material Composite
Terminations Tin-silver (96.5/3.5) over copper.
Weight 1.9 – 2.1g
Ambient temperature –40°C to +125°C with Irms current
Maximum part temperature +165°C (ambient + temp rise).
Storage temperature Component: –55°C to +165°C.
Tape and reel packaging: –55°C to +80°C
Resistance to soldering heat Max three 40 second reflows at
+260°C, parts cooled to room temperature between cycles
Moisture Sensitivity Level (MSL) 1 (unlimited floor life at <30°C /
85% relative humidity)
Enhanced crush-resistant packaging 150 per 7″reel
Plastic tape: 16 mm wide, 0.3 mm thick, 12 mm pocket spacing,
7.21 mm pocket depth
DCR (mOhms)3
SRF (MHz)4
Irms (A)6
(A) 2ꢀ°C rise 4ꢀ°C rise
Inductance2
2ꢀ0 (µH)
Isat5
Part number1
typ
max
min
typ
Irms Testing
ST541PYA161MLZ
ST541PYA301MLZ
ST541PYA551MLZ
ST541PYA651MLZ
ST541PYA801MLZ
0.16
0.30
0.55
0.65
0.80
0.75
1.06
1.42
1.75
2.08
0.83
1.17
1.56
1.93
2.29
166
108
71
59
54
207
135
89
74
67
78.0
55.6
43.0
40.0
37.8
22.9
19.6
17.6
15.8
15.6
27.1
25.1
21.8
19.9
19.4
Irms testing was performed on a
0.060″ thick pcb with 4 oz. copper
traces optimized to minimize
additional temperature rise.
Temperature rise is highly
dependent on many factors
including pcb land pattern,
trace size, and proximity to
other components. Therefore
temperature rise should be
verified in application conditions.
ST541PYA102MLZ
ST541PYA122MLZ
ST541PYA182MLZ
ST541PYA222MLZ
ST541PYA332MLZ
1.0
1.2
1.8
2.2
3.3
2.55
3.10
4.05
5.73
8.56
2.81
3.41
4.46
6.33
9.42
51
34
34
28
26
64
43
43
35
32
34.8
31.2
25.0
19.6
19.4
15.0
12.2
11.9
9.9
18.8
16.2
15.8
13.4
11.3
8.7
ST541PYA472MLZ
ST541PYA562MLZ
ST541PYA682MLZ
4.7
5.6
6.8
12.96
13.67
17.84
14.26
15.03
19.62
21
17
16
26
21
20
15.2
13.0
12.8
7.9
6.4
5.1
10.2
8.6
6.9
1. When ordering, please specify testing code:
ST541PYA682MLZ
Testing: Z = Unscreened
H = Group A screening per Coilcraft CP-SA-10001
All screening performed to the document’s latest revision
2. Inductance tested at 100 kHz, 0.1 Vrms using an Agilent/HP 4192A.
3. DCR measured on a micro-ohmmeter.
4. SRF measured using an Agilent/HP 4395A or equivalent.
5. DC current at 25°C that causes a 30% (typ) inductance drop from its value without current.
6. Current that causes the specified temperature rise from 25°C ambient.This information is for reference only
and does not represent absolute maximum ratings.
7. Electrical specifications at 25°C.
Refer to Doc 362 “Soldering Surface Mount Components” before soldering.
Document ST856-1 Revised 08/09/18
®
This product may not be used in medical or high
risk applications without prior Coilcraft approval.
Email cps@coilcraft.com Specifications subject to change without notice.
www.coilcraft-cps.com Please check our web site for latest information.
Fax 847-639-1508
1102 Silver Lake Road
Cary, IL 60013
Phone 800-981-0363
© Coilcraft, Inc. 2018