The CMKD-1040A Series is a large, high-current SMD Molded Inductor in a 11.5 mm × 10.0 mm footprint with a 4.0mm low profile. This series is engineered for high-current, high-frequency (up to 5MHz) power supplies.
This smd high current power inductor is built with an Alloy iron powder core ("A" material) and features an extremely high saturation current (Isat) of up to 75.0A. It has an ultra-low DCR (as low as 0.65mΩ max) for high efficiency. Its properties are critical for complex power inductor circuit design. The CMKD-1040A is a market-leading low profile power inductor solution for high-efficiency server, notebook, and multi-phase regulator applications.
Key Features
Very High Saturation Current: Rated up to 75.0A.
Ultra-Low DCR: As low as 0.65mΩ (max) for high-efficiency power conversion.
10mm-Class Footprint: 11.5 mm × 10.0 mm package.
Low Profile: 4.0mm maximum height.
Molded Construction: Magnetically shielded for low EMI and low core loss.
High Frequency Operation: Suitable for frequencies up to 5MHz.
Halogen-Free & RoHS Compliant.
Operating Temperature: -55°C to +125°C.
Applications
The CMKD-1040A's high-current, low-DCR design is ideal for high-performance power rails:
Voltage Regulator Module (VRM) for servers and desktops
1
>>
Multi-phase regulators
2
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High-power notebook regulators
3
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Point-of-load (POL) modules
4
Electrical Characteristics
|
Part No. |
Inductance (L₀) (µH) (±20%) |
Test condition |
DCR (mΩ) TYP. |
DCR (mΩ) MAX. |
Isat (A) TYP. |
Idc (A) TYP. |
|
CMKD-1040A-R15M |
0.15 |
100 kHz, 1V |
0.5 |
0.65 |
75.0 |
45.0 |
|
CMKD-1040A-R22M |
0.22 |
100 kHz, 1V |
0.9 |
1.0 |
60.0 |
35.0 |
|
CMKD-1040A-R30M |
0.30 |
100 kHz, 1V |
0.95 |
1.1 |
50.0 |
35.0 |
|
CMKD-1040A-R36M |
0.36 |
100 kHz, 1V |
1.05 |
1.2 |
50.0 |
30.0 |
|
CMKD-1040A-R47M |
0.47 |
100 kHz, 1V |
1.5 |
1.7 |
40.0 |
30.0 |
|
CMKD-1040A-R56M |
0.56 |
100 kHz, 1V |
1.6 |
1.8 |
33.0 |
25.0 |
|
CMKD-1040A-R68M |
0.68 |
100 kHz, 1V |
2.4 |
2.1 |
30.0 |
23.0 |
|
CMKD-1040A-R80M |
0.80 |
100 kHz, 1V |
2.6 |
2.7 |
29.0 |
23.0 |
|
CMKD-1040A-1R0M |
1.0 |
100 kHz, 1V |
3.0 |
3.3 |
28.0 |
19.0 |
|
CMKD-1040A-1R5M |
1.5 |
100 kHz, 1V |
3.8 |
4.2 |
26.0 |
16.0 |
|
CMKD-1040A-2R2M |
2.2 |
100 kHz, 1V |
6.0 |
7.0 |
18.0 |
12.0 |
|
CMKD-1040A-3R3M |
3.3 |
100 kHz, 1V |
11.8 |
10.0 |
16.0 |
11.0 |
|
CMKD-1040A-4R7M |
4.7 |
100 kHz, 1V |
20.0 |
17.0 |
15.0 |
9.0 |
|
CMKD-1040A-6R8M |
6.8 |
100 kHz, 1V |
25.0 |
22.0 |
12.0 |
8.5 |
|
CMKD-1040A-8R2M |
8.2 |
100 kHz, 1V |
27.0 |
25.0 |
9.0 |
8.0 |
|
CMKD-1040A-100M |
10.0 |
100 kHz, 1V |
27.0 |
30.0 |
8.5 |
7.8 |
|
CMKD-1040A-150M |
15.0 |
100 kHz, 1V |
45.0 |
40.0 |
7.0 |
6.5 |
|
CMKD-1040A-220M |
22.0 |
100 kHz, 1V |
58.0 |
66.0 |
5.5 |
5.0 |
|
CMKD-1040A-330M |
33.0 |
100 kHz, 1V |
92.0 |
85.0 |
5.0 |
4.4 |
|
CMKD-1040A-470M |
47.0 |
100 kHz, 1V |
130.0 |
145.0 |
3.5 |
3.3 |
|
CMKD-1040A-680M |
68.0 |
100 kHz, 1V |
195.0 |
178.0 |
3.0 |
2.5 |
|
CMKD-1040A-101M |
100.0 |
100 kHz, 1V |
315.0 |
350.0 |
2.3 |
2.2 |
Notes:
Test Conditions: All test data is referenced to 25°C ambient.
Operating Temperature Range: -55°C to +125°C (ambient plus self-temperature rise).
Isat (Saturation Current): DC current (A) that will cause L₀ to drop approximately 30%.
Idc (Rating Current): DC current (A) that will cause an approximate ΔT of 40°C.
Temperature Limit: The part temperature (ambient + temp rise) should not exceed 125°C under worst-case operating conditions.
Performance Graphs
Shape and Dimensions
Reliability
This product is qualified against a series of mechanical and endurance tests, including Solder Heat Proof, Thermal Shock, Humidity Resistance, and Vibration. (See PDF page 24 for full details).
Packaging
Packaging: Embossed Carrier Tape
Reel Diameter: 330 mm
Tape Width: 24 mm
Quantity/Reel: 500 pcs
Solder Reflow Profile
Preheat condition: 150~200°C / 60~120 sec.
Allowed time above 217°C: 60~90 sec.
Max temp: 260°C (compliant with J-STD-020D)
Max time at max temp: 10 sec.
Allowed Reflow time: 2x max
Solder paste: Sn/3.0Ag/0.5Cu
(Note: This profile is for qualification only. Actual profiles must be based on the customer's specific board design and process.)
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