The part number **RA73F1J412RBTD** refers to a high-precision, thin-film chip resistor manufactured by **TE Connectivity** (specifically within the Holsworthy range). Below is a detailed breakdown of its electronic specifications and characteristics. --- ### 1. Part Number Breakdown Understanding each character in the part number reveals the component's identity: | Code Segment | Meaning | Description | | :--- | :--- | :--- | | **RA73** | Series Name | High stability precision thin film resistor. | | **F** | TCR | Temperature Coefficient of Resistance: ±10ppm/°C. | | **1J** | Case Size | 0603 Package size (1.6 x 0.8 mm). | | **412R** | Resistance Value | 412 Ohms (R denotes the decimal point). | | **B** | Tolerance | ±0.1% (High precision). | | **TD** | Packaging | Taped and Reeled (Standard 5k or 1k reels). | --- ### 2. Key Technical Specifications These parameters define how the resistor performs under electrical load and environmental stress. * **Resistance:** 412 $\Omega$ * **Tolerance:** ±0.1% (Very tight tolerance, suitable for instrumentation). * **Power Rating:** 0.1W (1/10th Watt) at 70°C. * **Temperature Coefficient (TCR):** ±10ppm/°C (Ensures resistance stays stable despite temperature changes). * **Maximum Operating Voltage:** 75V. * **Operating Temperature Range:** -55°C to +155°C. --- ### 3. Construction and Material As a **Thin Film** resistor, the RA73 series is constructed differently than standard "Thick Film" (CRCW/ERJ) resistors: * **Sputtered Layer:** A thin layer of resistive material (often Nichrome) is vacuum-deposited onto a high-grade alumina ceramic substrate. * **Stability:** Thin-film technology provides much lower noise and better linearity than thick-film counterparts. * **Protection:** The resistive element is covered with an epoxy protective coating and features lead-free wrap-around terminations (Matte Tin over Nickel). --- ### 4. Common Applications Due to its high precision and low temperature drift, this component is typically found in: 1. **Medical Equipment:** High-accuracy monitoring sensors. 2. **Instrumentation:** Measurement bridges and calibration circuits. 3. **Industrial Controls:** Precision DAC/ADC voltage dividers. 4. **Telecommunications:** Signal conditioning and base station electronics. ---