Based on the manufacturer and naming convention, the 4DFA-1575B-12 from Toko America Inc. is likely a high-frequency inductor or filter component. Toko is known for manufacturing inductors, coils, and filters used in RF and signal processing applications. This particular component likely operates at radio frequencies and is designed for filtering or impedance matching.

Applications

• RF Filters
• Impedance Matching Networks
• Wireless Communication Circuits
• Oscillator Circuits
• Tuned Circuits
• GPS Receivers (1575 MHz is the GPS L1 frequency)

Features

• Surface Mount Design
• High Q Factor
• Tight Tolerance
• Small Size
• Excellent Temperature Stability
• RoHS Compliant

Benefits

• Provides efficient filtering of unwanted signals.
• Enables optimized impedance matching for maximum power transfer.
• Suitable for high-frequency applications.
• Facilitates compact circuit designs.
• Ensures stable performance over a wide temperature range.
• Compliant with environmental regulations.

Technical Specifications

Typical Toko inductors feature inductance values ranging from nanohenries to microhenries. The 4DFA-1575B-12, given the '1575' in the part number, is very likely to be designed to be used at 1575MHz (GPS L1 frequency). Tolerance is usually around 5% or better. Self-resonant frequency (SRF) is typically high to ensure performance at the intended operating frequency. DC resistance (DCR) is usually low to minimize losses. Operating temperature ranges generally span -40°C to +85°C. The component is usually packaged in a small surface-mount package (e.g., 0603, 0805). The Q factor is important for filtering applications, with higher Q values resulting in sharper filter responses.

Since specific details are unavailable without the official Toko datasheet, the precise inductance value, Q factor, SRF, DCR, and package size need to be confirmed from Toko's documentation for the 4DFA-1575B-12 part number. This ensures its suitability for the intended application and operating conditions. If intended for GPS, the component will be precisely tuned to the 1575.42 MHz frequency.