1. Voltage Regulation Tolerance: The UDZ7V5B‑7 offers ±2% tolerance, while the CMDZ5236B is rated at ±5%. This results in a tighter actual regulation range for the former (7.35 V to 7.65 V) compared to the latter (7.125 V to 7.875 V). In circuits requiring precise voltage reference, the ±2% part delivers better performance and higher consistency. 2. Dynamic Impedance: The CMDZ5236B has a maximum Zzt of 6 Ω, significantly lower than the 30 Ω of the UDZ7V5B‑7. With lower dynamic impedance, the CMDZ5236B maintains more stable terminal voltage under load variations, exhibiting a “stiffer” regulation characteristic—especially near the test current Iz. 3. Reverse Leakage Current: At similar reverse bias voltages, the UDZ7V5B‑7 shows a leakage current of 500 nA, whereas the CMDZ5236B measures 3 μA—an order of magnitude higher. For power‑sensitive applications such as battery‑powered systems, the UDZ7V5B‑7 offers lower high‑impedance state loss and likely better leakage performance at elevated temperatures. 4. Rated Power: The CMDZ5236B is rated for 250 mW, higher than the 200 mW of the UDZ7V5B‑7. Under identical operating conditions, the CMDZ5236B exhibits lower temperature rise and greater reliability margin, and can withstand higher surge energy. 5. Cost vs. Performance Positioning: The UDZ7V5B‑7 is notably lower in cost, providing an economic advantage where precision and low leakage are sufficient. The CMDZ5236B carries a higher price but delivers superior combined power and impedance performance, positioning it as a higher‑grade option.