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Microchip Technology 1N4728AG — Discrete Semiconductors

Microchip 1N4728AG Zener Diode, 3.3V, 1W, DO-41, Axial

MPN1N4728AG
Active

Microchip Technology 1N4728AG Zener Diode, 3.3 V, 1 W, ±5% Tolerance, DO-204AL (DO-41) Axial, Through Hole, Bulk.

$2.7200Ref. price · indicative, final on quote
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

1N4728AG specifications
ParameterValue
MountingThrough Hole
Voltage - zener (Nom)3.3 V
Voltage - forward (Vf) (Max) @ if1.2 V @ 200 mA
Current - reverse leakage @ vr100 µA @ 1 V
Power - max1 W
Operating temperature-65°C~175°C
PackageBulk
Tolerance±5%
CaseDO-204AL, DO-41, Axial
Impedance (Max)10 Ohms

Product details

3.3 V regulation at 1 W

The 1N4728AG is a 3.3 V Zener diode rated for 1 W continuous power dissipation — the voltage reference or shunt regulation point for a low-voltage rail in a through-hole design. Tolerance is ±5%, so the actual Zener voltage sits between 3.135 V and 3.465 V at the test current; the 10 Ohm maximum impedance (Zzt) keeps the regulation slope tight across the operating current range.

DO-41 axial package and temperature range

Reverse leakage is 100 µA maximum at 1 V reverse voltage, and forward voltage drop is 1.2 V maximum at 200 mA forward current — useful when the diode sees brief forward bias during transient conditions.