Gowanda’s 28M821K is a high-quality molded unshielded RF coil designed for reliable performance in various applications. Weighing 2.65 grams and measuring 22.86 × 7.137 × 7.137 mm, this component is part of the 28M series and features through-hole technology (THT) mounting. It is suitable for commercial off-the-shelf (COTS) applications, offering an inductance of 8.2 µH with a Q minimum of 60 at a test frequency of 7.9 MHz. The coil has a direct current resistance (DCR) of 1.4 ohms and a self-resonant frequency (SRF) of 68 MHz, with a current rating of 0.55 A DC. It is designed to withstand dielectric withstanding voltages (DWV) of 1000 and 200, with a tolerance of ±10%. The termination type is lead-based with a Sn63Pb37 finish, and the core is made of phenolic material. Operating within a temperature range of -55°C to +105°C, the component is rated at moisture sensitivity level (MSL) 1 and is packaged in tape and reel (T&R) format. Additionally, it is fungal inert, ensuring durability and reliability in various environments.
| Weight | 2.65 g |
|---|---|
| Dimensions | 22.86 × 7.137 × 7.137 mm |
| Series | 28M |
| Mounting Type | THT |
| Application Grade | COTS |
| Inductance (µH) | 8.2 |
| Q MIN | 60 |
| Test Freq (MHz) | 7.9 |
| DCR (Ω) | 1.4 |
| SRF (MHz) | 68 |
| Current Rating (A DC) | 0.55 |
| DWV | 1000, 200 |
| Tolerance | ±10% |
| Termination Type | Pb |
| Termination Finish | Sn63Pb37 |
| Core | Phenolic |
| Shielded | No |
| Operating Temperature | -55°C to +105°C |
| MSL | 1 |
| Packaging | T&R |
| Fungal Inert | Yes |
Molded Unshielded RF Coils
