Gowanda’s 21M391G is a high-quality molded unshielded RF coil designed for reliable performance in various applications. Weighing 1.7 grams, this component features dimensions of 14.224 × 5.588 × 5.588 mm and belongs to the 21M series. It is a through-hole technology (THT) component with a commercial off-the-shelf (COTS) application grade. The coil offers an inductance of 3.9 µH with a minimum Q factor of 40, tested at a frequency of 7.9 MHz. It has a DC resistance of 1.2 ohms and a self-resonant frequency of 100 MHz, supporting a current rating of 0.44 A DC. The dielectric withstanding voltage is rated at 1000, 200, with a tolerance of ±2%. The termination type is lead-based with a Sn63Pb37 finish, and the core material is phenolic. It operates effectively in temperatures ranging from -55°C to +125°C, with a moisture sensitivity level of 1. The component is packaged in tape and reel (T&R) and is fungal inert, ensuring durability and reliability in demanding environments.
| Weight | 1.7 g |
|---|---|
| Dimensions | 14.224 × 5.588 × 5.588 mm |
| Series | 21M |
| Mounting Type | THT |
| Application Grade | COTS |
| Inductance (µH) | 3.9 |
| Q MIN | 40 |
| Test Freq (MHz) | 7.9 |
| DCR (Ω) | 1.2 |
| SRF (MHz) | 100 |
| Current Rating (A DC) | 0.44 |
| DWV | 1000, 200 |
| Tolerance | ±2% |
| 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
