The **Z201250R00CB** is a high-precision, ultra-stable resistor based on **Bulk Metal® Foil technology**, manufactured by Vishay Precision Group (VPG). It belongs to the Z-Series, which is engineered for applications where accuracy and temperature stability are critical. --- ### 1. Key Technical Specifications | Parameter | Specification | |:---|:---| | **Resistance Value** | 250 $\Omega$ | | **Tolerance** | ±0.25% (indicated by the 'C' suffix) | | **Temperature Coefficient (TCR)** | 0.2 ppm/°C (-55°C to +125°C) | | **Power Rating** | 0.6 Watts at 70°C | | **Load Life Stability** | ±0.005% (2000 hours) | | **Technology** | Z-Foil (Bulk Metal Foil) | | **Package/Case** | Through-hole (TO-226 variation) | --- ### 2. Core Features * **Ultra-Low TCR:** The 0.2 ppm/°C Temperature Coefficient of Resistance ensures that the resistance value remains virtually unchanged even as the surrounding temperature fluctuates. * **Non-Inductive/Non-Capacitive:** Due to the internal foil pattern, this resistor exhibits excellent frequency response and high-speed settling time. * **Electrostatic Discharge (ESD) Immunity:** Unlike thin-film or thick-film resistors, Bulk Metal Foil is highly resistant to ESD events up to 25,000V. * **Shelf Life Stability:** It maintains extreme precision over years of storage without significant drifting. --- ### 3. Part Number Breakdown Understanding the nomenclature helps identify the exact configuration: | Code Segment | Meaning | |:---|:---| | **Z201** | The Model/Series (High Precision Through-hole) | | **250R00** | Resistance value (250.00 Ohms) | | **C** | Tolerance code (±0.25%) | | **B** | Packaging code (Bulk) | --- ### 4. Typical Applications These resistors are not used in general consumer electronics but rather in specialized fields: * **Metrology:** Reference standards for calibration equipment. * **Aerospace & Defense:** Guidance systems and high-reliability sensors. * **Medical Equipment:** Precision imaging (MRI/CT) and laboratory analysis tools. * **Audio Gear:** High-end "audiophile" grade signal paths where thermal noise must be minimized. ---