Gowanda’s 21M821M is a high-quality, reliable molded unshielded RF coil designed for various applications, particularly in the commercial off-the-shelf (COTS) category. This component weighs 1.7 grams and measures 14.224 × 5.588 × 5.588 mm, featuring a through-hole technology (THT) mounting type. It offers an inductance of 8.2 µH with a minimum Q factor of 35, tested at a frequency of 7.9 MHz. The coil has a DC resistance of 0.22 ohms and a self-resonant frequency of 44 MHz, with a current rating of 0.68 A DC. It is constructed with a powdered iron core and is not shielded, operating effectively within a temperature range of -55°C to +105°C. The component is rated at moisture sensitivity level 1 and is packaged in tape and reel (T&R) format. It is also fungal inert, ensuring durability and reliability in various environments. The termination type is lead-based with a Sn63Pb37 finish, and it offers a dielectric withstanding voltage (DWV) of 1000, 200, with a tolerance of ±20%.
| Weight | 1.7 g |
|---|---|
| Dimensions | 14.224 × 5.588 × 5.588 mm |
| Series | 21M |
| Mounting Type | THT |
| Application Grade | COTS |
| Inductance (µH) | 8.2 |
| Q MIN | 35 |
| Test Freq (MHz) | 7.9 |
| DCR (Ω) | 0.22 |
| SRF (MHz) | 44 |
| Current Rating (A DC) | 0.68 |
| DWV | 1000, 200 |
| Tolerance | ±20% |
| Termination Type | Pb |
| Termination Finish | Sn63Pb37 |
| Core | Powdered Iron |
| Shielded | No |
| Operating Temperature | -55°C to +105°C |
| MSL | 1 |
| Packaging | T&R |
| Fungal Inert | Yes |
Molded Unshielded RF Coils
