What is large current Power Choke Coil for automotive use
3 features of Power Choke Coil
Large current in compact size as 12mm square SMD type
Excellent heat resistance and vibration resistance in compact size
SMD type enables automatic mounting on PCBs,
contributing to customer’s process cost down
Large current in compact size as 12mm square SMD type,
contributing to direct mounting on ECU engines and space saving of power supply circuits
20.2 ～ 53.5 A
DC current which causes temperature rise of 40K. Parts are soldered by reflow on multilayer PWB with high heat dissipation performance. Note: Heat radiation constant are approx. 20 K/W measured.
The metal composite material using unique metal magnetic material and the wired coil using thick copper wire enable gapless monolithic structure by monolithic molding of the magnetic material and the wired coil without gap.
As a result, the coil heat generation is reduced and the coil heat dissipation is increased, and a large current of 20 to 53A is achieved while reducing the volume by half compared to the ferrite type.
The monolithic structure by the metal magnetic material enables
more than twice of high heat dissipation
Excellent heat resistance and vibration resistance in compact size, contributing to direct mounting on ECU engines
Heat resistance : 160 °C / 2000 h in SMD type
Vibration-resistance : 5 Hz to 2 kHz / 30 G
No abnormal condition in product and solder part as reliability test result
Reliability test items
-40 °C to +160 °C
30 Ｇ(5 Hz to 2 kHz)
XYZ(2 h each)
High Temp. Life
160 °C, DC rated current
85 °C,85% RH
85 °C,85%RH, DC rated current
■Pretreatment condition: after 85±2°C,85%RH,168h, 3 times reflow aging
※Possible to set up vibration/reflow condition etc. according to customer's condition.
Vibration condition: 5 Hz to 2000 Hz／30 G／xyz ／ 2 hr. each
Heat resistance of 160°C is achieved by working on the composition of metal composite material. In addition, while the thick copper wire of the coil is drawn out to be used as terminals, an unique structure is adopted by fixing the terminals on the metal composite material body in a caulking structure on the bottom side, thus the vibration resistance is enhanced.
SMD type enables automatic mounting on PCBs, contributing to customer’s process cost down
Unique terminal structure technology to assure heat capacity as SMD type, with the copper wire of the coil drawn out to be used as terminals
Large capacity and down sizing requirements from function integration in accordance with increasing number of ECUs.
Application requires large capacity, down sizing, high reliability.
ELECTRIC PUMP INPUT FILTER
ELECTRIC FAN MOTOR INPUT FILTER
DIRECT INJECTION INPUT FILTER
BREAKING SYSTEM INPUT FILTER
EGR INPUT FILTER
ELECTRIC COMPRESSOR INPUT FILTER
EPS INPUT FILTER
BODY ELECTRIC SYSTEM INPUT FILTER
▲ : Under development
DCR 20 °C
Rated Current (*2)
▲0.33 μH ± 20%
0.70 mΩ ± 10%
0.68 μH ± 20%
1.10 mΩ ± 10%
1.0 μH ± 20%
1.36 mΩ ± 10%
1.5 μH ± 20%
1.80 mΩ ± 10%
2.5 μH ± 20%
2.60 mΩ ± 10%
3.3 μH ± 20%
3.60 mΩ ± 10%
4.7 μH ± 20%
4.90 mΩ ± 10%
(*1)：Measured at 100 kHz.
(*2)：DC current which causes temperature rise of 40K. Parts are soldered by reflow on multilayer PWB with high heat
dissipation performance. Note: Heat radiation constant are approx. 20 K/W measured.