http://www.alpsgd.com/eng/index.html
GLMD Series LiqualloyTM
Power Inductor
Technical Data Sheet
Revised2013/02/04
http://www.alpsgd.com/eng/index.html
02
 Features
●11.5x10mmsquareand4.0mmheight
●Liqualloylowcorelossmaterialforhigh-efficiencypowersupplies
●Forlargecurrent
●Excellentlowheatgenerationcharacteristicsandhighreliabilityduetolowdirect
 currentresistance(DCR)
●Metalcompositestructureallowsacompactsize
●OperatingTemperature:-20~+125℃(Includingselftemperaturerise)
●RoHScompliant
 Application
●CPUandgraphicspowersupplycircuitsfornotebookPCs
●DC/DCconvertersforserversandgameconsoles,etc.
●POL（PointofLoad）powersupplies
Specification
OuterAppearanceofLiqualloyTMInductor
＊：
measured under 20℃.
LiqualloyTM Power Inductor GLMD Series
RatedCurrent
Saturation
Current
ΔL/L=30%
HeatRating
Current
ΔT=40℃
(A)Max.(Typ.) (A)Max.(Typ.)(μH)at100kHz (mΩ)
Inductance
ALPS
PartNo.
DCResistance*
30(35) 32(35)
25(30) 27(29)
0.36±20% 0.76±7%
0.45±20%
GLMDR3601A
GLMDR4501A 1.10±7%
Revised2013/02/04
http://www.alpsgd.com/eng/index.html
03
Specification
Unit：mm
LiqualloyTM Power Inductor GLMD Series
OutlineDimensionsandSchematics
RecommendLandPatternDimensions
A
B
C
5.4
4.1
13.6
LotNo.ID
(1) (2) (3) (4)
(5) (6) (7)
(8)
InductanceID
Ａ
Ｂ
C
Tolerance:±0.3
Unit:mm
RotationID
Revised2013/02/04
http://www.alpsgd.com/eng/index.html
04
Specification
LiqualloyTM Power Inductor GLMD Series
SchematicDiagramofRdcMeasurement
GLMDR4501A GLMDR3601A
MeasuringTerminal
Terminal
Core
MeasuringTerminal
Terminal
Core
Revised2013/02/04
http://www.alpsgd.com/eng/index.html
05
D.C. bias & Q-f characteristics
0
20
40
60
80
100
120
140
160
10 100 1000 10000
Frequency [kHz]
Q
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0 5 10 15 20 25 30 35
DC current (A)
L (μH)
0.36μH
0.45μH
0.36μH
0.45μH
Revised2013/02/04
http://www.alpsgd.com/eng/index.html
06
L-f characteristics & Temperature
rise (ΔT) dependence on Load Current
10 100 1000 10000
0.0
10.0
20.0
30.0
40.0
50.0
60.0
70.0
80.0
0 5 10 15 20 25 30 35 40
DC current (A)
∆T (℃)
0
0.1
0.2
0.3
0.4
0.5
0.6
Frequency [kHz]
L ( μH)
0.36μH
0.45μH
0.36μH
0.45μH
Revised2013/02/04
http://www.alpsgd.com/eng/index.html
07
Packing
GLMC/GLMH φ330
φ330
17.5
25.4
21.5
29.4
16
24
7.5
11.5
6.8
10.5
7.8
12.1
3.3
4.3
0.4
0.4
12
A B1 B2 C D E F
Reel Size Tape Size QNT
G H I
16
1000
1000
GLMD
Unreeling direction
Unit：mm
Revised2013/02/04
http://www.alpsgd.com/eng/index.html
08
 Precautions when handling our products
1. For the export of products which are controlled items subject to foreign and domestic export laws and regulations, you
must obtain approval and/or follow the formalities of such laws and regulations.
2. Products must not be used for military and/or antisocial purposes such as terrorism, and shall not be supplied to any
party intending to use the products for such purposes.
3. Unless provided for otherwise, the products have been designed and manufactured for application in equipment and
devices which are sold to end users in the market, including audio-visual (AV) equipment, electrical home appliances,
office machines, information and communication equipment, and amusement equipment. The products are not intended
for use in, and must not be used for, any application for nuclear equipment, driving equipment for aerospace or any other
unauthorized use. With the exception of the abovementioned prohibited applications, please contact an Alps sales
representative and/or evaluate the total system regarding applicability for applications involving high levels of safety and
liability such as medical equipment, burglar alarm equipment, disaster prevention equipment and undersea equipment.
Please also incorporate fail-safe design, protection and redundant circuitry, malfunction protection, and/or fire protection
into the complete system to ensure safety and reliability of the total system.
4. Before using products which were not specifically designed for use in automotive applications, please contact an Alps
sales representative.
 Cautions regarding this technical data sheet
1. The specifications herein are an overview of the specifications. Obtain official specifications before use.
2. The colors of the products this technical data sheet may slightly differ from those of the actual products.
3. The external appearance, functions and other specifications herein may be discontinued without prior notice.
■Inquiries about Products
Products Information Center
+81 (3) 5499-8154
Products Information Site
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Development, Production
Sales
1-7, Yukigaya-otsukamachi, Ota-ku, Tokyo, Japan 145-8501
Attention
Revised2013/02/04
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Authorized Distributor
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