Gowanda’s 21M331K is a high-quality molded unshielded RF coil designed for reliable performance in various electronic applications. Weighing 1.7 grams, this component features dimensions of 14.224 × 5.588 × 5.588 mm and is part of the 21M series. It is mounted using through-hole technology (THT) and is suitable for commercial off-the-shelf (COTS) applications. With an inductance of 3.3 µH and a minimum Q factor of 40, it operates at a test frequency of 7.9 MHz. The coil has a DC resistance of 1 ohm and a self-resonant frequency of 105 MHz, supporting a current rating of 0.48 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 (Pb) with a Sn63Pb37 finish, and it features a phenolic core. Operating efficiently in temperatures ranging from -55°C to +125°C, it has a moisture sensitivity level (MSL) of 1 and is packaged in tape and reel (T&R) format. Additionally, it is fungal inert, ensuring durability in various environments.
| Weight | 1.7 g |
|---|---|
| Dimensions | 14.224 × 5.588 × 5.588 mm |
| Series | 21M |
| Mounting Type | THT |
| Application Grade | COTS |
| Inductance (µH) | 3.3 |
| Q MIN | 40 |
| Test Freq (MHz) | 7.9 |
| DCR (Ω) | 1 |
| SRF (MHz) | 105 |
| Current Rating (A DC) | 0.48 |
| DWV | 1000, 200 |
| Tolerance | ±10% |
| Termination Type | Pb |
| Termination Finish | Sn63Pb37 |
| Core | Phenolic |
| Shielded | No |
| Operating Temperature | -55°C to +125°C |
| MSL | 1 |
| Packaging | T&R |
| Fungal Inert | Yes |
Molded Unshielded RF Coils
