TDK SPM Series Power Inductors

SPM Power Inductors

As electronic devices become more and more advanced, the need for high-performance power components increases. TDK offers a large selection of SPM series power inductors to meet this need. SPM inductors are available in various types, including high current, low profile, and AEC-Q200 compliant types for automotive applications. SPM power inductors are metal composite type wound inductors that feature coils integrally molded with metallic magnetic powder. Compared to ferrite-based wire wound inductors, SPM series inductors are able to offer larger current, lower Rdc, smaller size, and superior DC bias characteristics.

TDK Power Inductor Part Series
Series	Commercial Grade	Automotive Grade
	SPM	SPM-CT	SPM-LR	SPM-XT	SPM-HZR	SPM-DZ	SPM-VC/VT
Operating Temperature Range	-40 to +125°C (including self-temperature rise)	-40 to +125°C (including self-temperature rise)	-55 to +155°C (including self-temperature rise)
Size Range	4.2 x 4.0 mm 5.2 x 5.0 mm 7.1 x 6.5 mm 10.7 x 10.0 mm	7.1 x 6.5 mm 13.0 x 12.5 mm	3.2 x 3.0 mm 4.4 x 4.1 mm 5.4 x 5.1 mm	11.5 x 10.0 mm 13.0 x 12.6 mm	4.1 x 4.0 mm 5.2 x 5.0 mm 7.1 x 6.5 mm 10.7 x 10.0 mm	4.3 x 4.1 mm	5.3 x 5.1 mm 7.0 x 6.5 mm 7.5 x 7.0 mm 10.5 x 10.0 mm 13.0 x 12.5 mm
Height Range	3.0 - 5.0 mm	5.0 - 6.5 mm	1.0 - 2.0 mm	4.0 - 6.5 mm	3.0 - 5.4 mm	2.0 mm	3.0 - 6.5 mm
Inductance Range	0.20 - 22 µH	0.22 - 0.5 µH	0.47 - 10 µH	0.10 - 2.80 µH	0.33 - 68 µH	0.10 - 2.2 µH	0.10 - 100 µH
Features	Standard specifications	High frequency & high Q specifications	Low profile specifications	Large current specifications	Small copper loss & high productivity	Compact, low profile	High inductance & high DC superimposition characteristics
Applications	LCD TV, HDD Amusement equipment Other AV equipment	Wireless charges IJP head drive	Notebook computers Tablet terminals Gaming equipment	Base stations, servers Amusement equipment Industrial equipment	Car accessories Car navigation Car audio	ADAS Start/Stop Engine ECUs	LED ADAS Engine ECUs, etc.

TDK Power Inductor Part Series

Series

Commercial Grade

Automotive Grade

SPM

Operating Temperature Range

-40 to +125°C
(including self-temperature rise)

-55 to +155°C
(including self-temperature rise)

Size Range

4.2 x 4.0 mm
5.2 x 5.0 mm
7.1 x 6.5 mm
10.7 x 10.0 mm

7.1 x 6.5 mm
13.0 x 12.5 mm

3.2 x 3.0 mm
4.4 x 4.1 mm
5.4 x 5.1 mm

11.5 x 10.0 mm
13.0 x 12.6 mm

4.1 x 4.0 mm
5.2 x 5.0 mm
7.1 x 6.5 mm
10.7 x 10.0 mm

4.3 x 4.1 mm

5.3 x 5.1 mm
7.0 x 6.5 mm
7.5 x 7.0 mm
10.5 x 10.0 mm
13.0 x 12.5 mm

Height Range

3.0 - 5.0 mm

5.0 - 6.5 mm

1.0 - 2.0 mm

4.0 - 6.5 mm

3.0 - 5.4 mm

2.0 mm

3.0 - 6.5 mm

Inductance Range

0.20 - 22 µH

0.22 - 0.5 µH

0.47 - 10 µH

0.10 - 2.80 µH

0.33 - 68 µH

0.10 - 2.2 µH

0.10 - 100 µH

Features

Standard specifications

High frequency & high Q specifications

Low profile specifications

Large current specifications

Small copper loss & high productivity

Compact, low profile

High inductance & high DC superimposition characteristics

Applications

LCD TV, HDD
Amusement equipment
Other AV equipment

Wireless charges
IJP head drive

Notebook computers
Tablet terminals
Gaming equipment

Base stations, servers
Amusement equipment
Industrial equipment

Car accessories
Car navigation
Car audio

ADAS
Start/Stop
Engine ECUs

LED
ADAS
Engine ECUs, etc.

Commercial Grade
Automotive Grade
Sample Kits
Product Resources

SPM
SPM-CT
SPM-LR
SPM-XT

SPM Series Power Inductors

The TDK SPM series of power inductors is a monolithic-type inductor offering high current capability with high saturation currents in small package sizes. This is achieved using TDK expertise in Fe-based material and original winding technologies. The SPM is magnetically shielded, with an operating temperature range of -40°C to +125°C, and is available in a variety of case sizes.

Features

Offers a variety of package sizes (3 mm x 3 mm, 4 mm x 4 mm, 5 mm x 5 mm, 6.5 mm x 7 mm and various heights) including low profile for portable applications
Magnetic-shield-type wound inductor with Fe magnetic material
Large current capability and high saturation current
Suitable for highly automated mounting processes
Smooth DC bias roll-off characteristic
Wide operating temperature range (-40°C to +125°C)

Applications

Smartphones
Tablets
Notebooks
Server point-of-load DC conversion
HDDs
Other compact voltage regulators

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SPM-CT Power Inductors with High Q / High Frequency Specifications

TDK's SPM-CT series are magnetically shielded, wire wound inductors for power circuits. Compared to conventional SPM series product, the SPM-CT type offers high Q characteristics in the high frequency region, thanks to use of a proprietary alloy powder. They also offer large current specifications, low Rdc, and compactness compared to ferrite wound type inductors. SPM-CT inductors have lower hum noise compared to the core adhesive coils. This is made possible with the use of metallic magnetic material and an integrated molded coil structure. Sizes range from 7.1 x 6.5 x 5 mm to 13.0 x 12.5 x 6.5 mm with an inductance range of 220 nH to 500 nH with ±15-20% inductance tolerance. They are available for use in applications such as wireless charging, noebook PCs, HDDs, servers, VRMs, and more.

Features

Magnetic shield type wound inductor for power circuits using a metallic magnetic material
Achieve large current, low Rdc, and compactness compared to ferrite wound type inductors
Low inductance variance in high-temperature environments with good DC superimposition characteristics
Hum noise is lower than with core adhesive coils through use of metallic magnetic material and a structure with an integrated molded coil
Low loss in the high frequency region thanks to high Q characteristics
Operating temperature range of -40°C to +125°C (including self-temperature rise)

Applications

Wireless chargers, IJP head drives, notebook PCs, HDDs, servers, VRMs, compact power supply modules, etc.

Additional Resources

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SPM-LR Series Inductors

TDK’s SPM-LR series power inductors are magnetically shielded, wire-wound inductors designed for use in power circuits. Their low profile makes them ideal for use in applications where height is restricted. The SPM-LR series has low inductance variance in high temperature environments with good DC superimposition characteristics and achieves large current, low RDC, and compactness compared to ferritewound type inductors. A metallic magnetic material is used and the structure has an integrated molded coil so hum noise is lower with the SPM-LR series inductors than with core adhesive coils. The SPM-LR series also has a redesigned terminal construction, based mainly on material change, and has a DCR improvement anywhere from 4% to 50% depending on case size and inductance value as compared with its predecessor SPM series.

Features

Low profile
Large current and low RDC
Operating temperature and storage temperature range of -40°C to +125°C after the PC board is mounted

Applications

Tablet terminals
Laptop computers
HDDs, VRMs, and servers
Compact power supply modules

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SPM-XT Series

TDK's SPM-XT series are magnetically shielded, wire wound inductors for power circuits using a metallic magnetic material. They offer large current specifications, low Rdc, and compactness compared to ferrite wound type inductors. SPM-XT inductors have lower hum noise compared to the core adhesive coils. This is made possible with the use of metallic magnetic material and an integrated molded coil structure. Sizes range from 11.5 x 10.0 x 4.0 mm to 13.0 x 12.6 x 6.5 mm with an inductance range of 0.18 µH to 2.8 µH with ±20% inductance tolerance. They are ideally suited for applications such as gaming equipment, base stations, servers, HDDs, industrial equipment, and more.

Features

Magnetic shield type wound inductor for power circuits using a metallic magnetic material
Achieve large current, low Rdc, and compactness compared to ferrite wound type inductors
Low inductance variance in high-temperature environments with good DC superimposition characteristics
Hum noise is lower than with core adhesive coils through use of metallic magnetic material and a structure with an integrated molded coil
Operating temperature range of -40°C to +125°C (including self-temperature rise)

Applications

Power supply around the CPU, HDDs, servers, VRMs, compact power supply modules, etc.

Additional Resources

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SPM-HZ/HZR
SPM-DZ
SPM-VC/VT-D

SPM-HZ/HZR Automotive Power Inductors

TDK's SPM-HZ/HZR series inductors are wirewound with a metal core and are designed for use in automotive power circuit applications such as car navigation and audio, electronic power steering, and headlights, among others. These inductors are magnetically shielded, and the structure has an integrated molded coil, so hum noise is lower than with ferrite core adhesive coils. Compared with ferrite wound inductors, SPM-HZ/HZR series inductors feature large current, low RDC, and small size. SPM-HZ/HZR inductors also feature low inductance variance in high-temperature environments with good DC superimposition characteristics.

Features

Wirewound inductors with metal core for automotive power circuits
Large current, low RDC, and small size compared to ferrite-wound type inductors
AEC-Q200 compliant
Low inductance variance in high-temperature environments with good DC superimposition
Operating temperature: -40°C to +125°C
Storage temperature (after the circuit board is mounted): -40°C to +125°C

Applications

Car navigation
Car audio
Electronic power steering
Headlights

Additional Resources

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SPM-DZ Automotive Power Inductors

TDK's SPM-DZ series are magnetically shielded, wire wound inductors for automotive power circuits using a metallic magnetic material. Compared to ferrite wound type inductors, the SPM-DZ series offers low Rdc and compactness with a footprint of 4.3 x 4.0 mm and a height of just 2 mm. SPM-DZ inductors also offer vibration resistance up to 30 G thanks to a unique vibration resistant product structure. Inductance ranges from 0.10 µH to 2.2 µH with ±20-30% inductance tolerance and rated currents from 4.6 - 24.6 A. SPM-DZ inductors are AEC-Q200 compliant and ideally suited for applications such as ADAS, ECM, BCM, and more.

Features

Magnetic shield type wound inductor for power circuits using a metallic magnetic material
Achieve low Rdc and compactness compared to ferrite wound type inductors
Low inductance variance in high-temperature environments with good DC superimposition characteristics
Operating temperature range of -55°C to +155°C (including self-temperature rise)
AEC-Q200 compliant

Applications

Automotive applications such as ADAS, ECM, BCM, etc.

Additional Resources

Learn More

SPM-VC/VT-D Automotive Power Inductors

TDK's SPM-VC/VT-D series wire wound inductors were designed and optimized for use in automotive applications such as LED, ECM, ADAS, and BCM. The AEC-Q200 compliant inductors are magnetically shielded and feature a metal core. SPM-VC/VT-D inductors are suitable for use in high-current applications, have high DC superimposition properties, and feature an operating temperature range of -55°C to +155°C. Inductances range from 0.1 µH to 100 µH (±20%) with current ratings from 3.3 A to 55.7 A.

Features

Metal composite type wound inductor for power circuits using a metallic magnetic material
Vibration resistance of 30 G due to vibration resistance structure
Operating temperature: -55°C to +155°C (including self-temperature rise)
Low RDC and miniaturization due to superior DC superimposition characteristics of metallic magnetic materials
Compliant with AEC-Q200

Applications