News Release | News Release: 2-in-1 Metal Inductors for Class D ‘DRU Series’
Sagami Elec Co., Ltd. is pleased to announce the development of its Metal Inductors for Class D, the “DRU Series” with samples now available.
This metal-type inductor is designed for Class D amplifier applications and is offered in three compact sizes (6 mm, 8 mm, and 10 mm), incorporating a space-saving 2-in-1 structure. It is also compliant with AEC-Q200, making it well suited for automotive audio systems.
The “DRU Series” uses metal materials to achieve a high-efficiency, low-loss design that delivers superior sound quality. Compared with conventional ferrite-type inductors, it supports higher current levels and provides excellent saturation characteristics, enabling reliable operation in high-output applications.
Beyond car audio and navigation systems, the series is ideal for a wide range of audiovisual applications and various power supply circuits, offering stable DC bias characteristics with minimal variation across different ambient temperatures.
Main Applications
- Car audio, Car navigation, Audio-visual equipment, AV Amplifier, Power supplies
Features
- High current capability achieved through metallic magnetic materials
- Space-saving design enabled by 2-in-1 construction
- Reduced acoustic noise due to the absence of air gaps
- Low inductance variation across temperature environments.
- Operating temperature：-40℃～+125℃ (Including self-heating)
- AEC-Q200 compliant
Electrical Characteristics
| Part Number | L(μH) | DCR(mΩ) | Isat(A) | Irat(A) | |
|---|---|---|---|---|---|
| Max | Typical | ||||
| DRU6973G-3R3M | 3.3 ± 20% | 19 | 15.6 | 13.2 | 5.7 |
| DRU6973G-100M | 10 ± 20% | 48.9 | 42.4 | 6.8 | 3.5 |
| DRU6973G-220M | 22 ± 20% | 134.0 | 112.0 | 4.3 | 2.2 |
| DRU8189G-3R3M | 3.3 ± 20% | 15.8 | 13.2 | 16.8 | 6.3 |
| DRU8189G-100M | 10 ± 20% | 40 | 32.5 | 8 | 4 |
| DRU8189G-220M | 22 ± 20% | 105 | 88 | 4.6 | 2.4 |
| DRU1010G-3R3M | 3.3 ± 20% | 8.5 | 7.4 | 26.0 | 9.0 |
| DRU1010G-100M | 10 ± 20% | 22.0 | 18.o | 12.0 | 5.8 |
| DRU1010G-150M | 15 ± 20% | 40.8 | 34.0 | 9.0 | 4.5 |
| DRU1010G-220M | 22 ± 20% | 56.0 | 46.0 | 8.5 | 3.6 |
Inductance Measuring Condition:100kHz,0.25V
DC saturation allowable current:The current value which inductance decrease 25% from the initial value
Temperature rise allowable current:The rise in temperature of core surface is 40℃