News Release | News Release: 2-in-1 Metal Inductors for Class D ‘DRU Series’
18 March 2026
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% | 48.2 | 42.4 | 6.8 | 3.5 |
| DRU6973G-220M | 22 ± 20% | 133.5 | 111.4 | 4.4 | 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 | 26.4 | 9.2 |
| DRU1010G-100M | 10 ± 20% | 21.7 | 17.6 | 12.4 | 5.8 |
| DRU1010G-150M | 15 ± 20% | 40.5 | 33.8 | 9.2 | 4.6 |
| DRU1010G-220M | 22 ± 20% | 55.2 | 45.1 | 8.8 | 3.8 |
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℃