Nexperia USA Inc. 1N4728A,113

Overview

1N4728A,113 from Nexperia is a 3.3 V ±5 % Zener voltage regulator diode in a hermetically sealed SOD66 (DO-41) glass package, rated for 1000 mW total power dissipation and 500 mA maximum forward current, used for low-voltage stabilization in linear power supplies and reference circuits.

For engineers reviewing the 1N4728A,113 datasheet, 1N4728A,113 pinout, 1N4728A,113 application, or 1N4728A,113 equivalent, this device serves as a precision shunt voltage reference with 76 mA test current, 10 Ω differential resistance, and 1 µA reverse leakage at 1 V - critical for analog sensing, biasing, and overvoltage protection design.

Technical Context

This Zener diode operates in reverse breakdown to maintain a stable 3.3 V reference across load variations, with thermal resistance of 110 K/W (junction-to-tie-point, 4 mm lead length) and junction temperature range from −65 °C to +200 °C.

It exhibits 1.2 V forward voltage at 200 mA, supports non-repetitive peak reverse current up to 1380 mA, and is characterized under thermal equilibrium conditions per IEC 60134 absolute maximum rating system.

Key Specifications

Pinout & Package

Hermetically sealed axial-leaded SOD66 (DO-41) glass package with 2 leads; cathode identified by a single dark band on the body.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar Zener voltage regulation applications.

Compared with 1N4728A-T and BZX55C3V3, the 1N4728A,113 offers full 1000 mW capability in a rugged glass package ideal for industrial power rails, while maintaining identical regulation performance - making it optimal for reliability-critical linear regulation and clamping.

Availability

1N4728A,113 is available at Aetrix Electronics and suitable for linear power supplies, overvoltage protection circuits, and analog sensor biasing requiring stable component supply and long-term parametric consistency.

Supply support for 1N4728A,113 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Nexperia is a global semiconductor expert delivering high-performance, reliable discrete, logic, and MOSFET solutions for automotive, industrial, and consumer markets.

The 1N47xxA series was engineered specifically for cost-effective, high-stability Zener regulation in legacy and new-design power management systems - emphasizing hermetic reliability and tight voltage tolerance.

FAQ

What is the maximum continuous power dissipation for 1N4728A,113?

The 1N4728A,113 is rated for 1000 mW total power dissipation at ambient temperature of 50 °C with 4 mm lead length. Derating is required above 50 °C at 8.3 mW/°C, reaching zero dissipation at 170 °C ambient per the thermal resistance of 110 K/W.

How does the 1N4728A,113 differ from the 1N4728A-T variant?

The 1N4728A,113 is supplied in bulk packaging (113 pieces), while 1N4728A-T uses tape-and-reel (3000 pcs/reel). Electrically and thermally, both share identical Zener voltage, differential resistance, and power ratings - the distinction is purely logistical and assembly-process oriented.

Can 1N4728A,113 be used in place of a 3.3 V LDO regulator?

No - it functions only as a shunt regulator requiring a series current-limiting resistor. Unlike an LDO, it cannot source load current directly; it sinks excess current to maintain voltage. It is appropriate for low-current references or clamping, not for powering loads above ~50 mA.

What is the reverse leakage current specification at 1 V?

Per Table 8 of the Nexperia datasheet, the reverse current (I_R) for 1N4728A is guaranteed ≤1 µA at V_R = 1 V and T_j = 25 °C. This low leakage supports accurate biasing in high-impedance analog circuits without significant error contribution.