Gowanda’s 28M331MLF is a high-quality molded unshielded RF coil designed for reliable performance in various electronic applications. This component, part of the 28M series, features a compact design with dimensions of 22.86 × 7.137 × 7.137 mm and a weight of 2.65 grams. It is suitable for through-hole technology (THT) mounting and is classified under the Commercial Off-The-Shelf (COTS) application grade. The coil offers an inductance of 3.3 µH with a minimum Q factor of 60, tested at a frequency of 7.9 MHz. It has a direct current resistance (DCR) of 0.305 ohms and a self-resonant frequency (SRF) of 100 MHz, with a current rating of 1.15 A DC. The dielectric withstanding voltage (DWV) is rated at 1000, 200, and it has a tolerance of ±20%. The termination type is RoHS compliant with a Sn/Cu finish, and the core is made of phenolic material. The component is not shielded and operates effectively within a temperature range of -55°C to +105°C. It has a moisture sensitivity level (MSL) of 1 and is packaged in tape and reel (T&R) format. Additionally, the coil 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) | 3.3 |
| Q MIN | 60 |
| Test Freq (MHz) | 7.9 |
| DCR (Ω) | 0.305 |
| SRF (MHz) | 100 |
| Current Rating (A DC) | 1.15 |
| DWV | 1000, 200 |
| Tolerance | ±20% |
| Termination Type | RoHS |
| Termination Finish | Sn/Cu |
| Core | Phenolic |
| Shielded | No |
| Operating Temperature | -55°C to +105°C |
| MSL | 1 |
| Packaging | T&R |
| Fungal Inert | Yes |
Molded Unshielded RF Coils
