5.6 V Zener, 1 W dissipation, DO-41 axial
The 1N4734APE3/TR8 is a 5.6 V Zener diode from Microchip Technology in the standard DO-204AL (DO-41) axial-lead package. It dissipates up to 1 W, so it handles steady-state regulation or transient clamping in a through-hole board without a heatsink — the axial leads conduct the heat into the PCB copper. The ±5% tolerance on the nominal 5.6 V zener voltage means the actual clamp point lands between 5.32 V and 5.88 V at the test current — tight enough for a 5 V rail crowbar or a reference in a linear regulator feedback divider.
Temperature range and leakage
Maximum zener impedance is 5 Ohms at the test current — a low dynamic resistance that keeps the voltage stable under varying load current, important when the diode is used as a shunt reference.