3.6 V Zener in a hermetic SQ-MELF
The 1N6486US/TR is a 3.6 V Zener diode rated for 1.5 W continuous power dissipation, housed in a surface-mount SQ-MELF (D-5A) package. The ±5% tolerance on the nominal voltage means the actual Zener voltage at the test current falls between 3.42 V and 3.78 V — tight enough for basic voltage clamping or reference duties where a precision bandgap is overkill. Maximum impedance (Zzt) is 10 Ohms, which sets the dynamic resistance at the Zener knee. A lower impedance means better regulation against load current changes; 10 Ohms is typical for a 1.5 W device at this voltage.
Temperature range and reverse leakage
The wide range suits applications where the diode sits near hot components or in uncontrolled thermal environments. Reverse leakage current is specified at 50 µA maximum when 1 V is applied across the junction — well below the Zener threshold, so the diode draws negligible current in the off state until the breakdown region is reached. Forward voltage is 1.5 V maximum at 1 A forward current, confirming the device can also conduct in the forward direction if the circuit demands it, though the primary role is reverse-breakdown regulation.