onsemi 1N4752A_S00Z

Overview

1N4752A_S00Z from ON Semiconductor is a 33 V, 1.0 W axial-leaded Zener diode in DO-41 glass package, rated for ±5% tolerance, 7.5 Ω dynamic impedance at 33 mA test current, and operating from –65 °C to +200 °C - used for precision voltage regulation in power supply feedback loops and overvoltage protection circuits.

For engineers reviewing the 1N4752A_S00Z datasheet, pinout, applications, or equivalent options, key selection criteria include Zener voltage accuracy, thermal derating (6.67 mW/°C above 50 °C), peak reverse surge capability (135 mA non-repetitive), leakage current ≤5 µA at 25.1 V, and DO-41 mechanical compatibility with through-hole PCB layouts.

Technical Context

The 1N4752A_S00Z operates as a two-terminal voltage reference device, maintaining stable reverse-biased conduction at its nominal 33 V Zener voltage when biased above its 33 mA test current. Its 7.5 Ω Zener impedance (ZZ @ IZ) ensures low output variation under load changes, while its 25.1 V maximum reverse voltage (VR) defines safe clamping headroom below breakdown.

Thermal design relies on lead-length-dependent power dissipation: full 1.0 W rating applies only at TL ≤ 50 °C with 3/8″ lead length; above that, linear derating of 6.67 mW/°C applies. The device's –65 °C to +200 °C operating range supports industrial and automotive under-hood applications where ambient extremes are expected.

Key Specifications

Pinout & Package

DO-41 glass axial package with cathode band marking; two-terminal device requiring no external biasing circuitry beyond series current-limiting resistor.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 1N4752A_S00Z, the base 1N4752A offers identical performance with standard marking, while BZX85C33 trades tighter impedance for higher power rating and slightly reduced max junction temperature - making it preferable only in thermally constrained, high-surge environments where regulation precision is secondary to ruggedness.

Availability

1N4752A_S00Z is available at Aetrix Electronics and suitable for industrial power supplies, automotive body control modules, and factory automation I/O protection circuits requiring stable component supply and long-lifecycle availability.

Supply support for 1N4752A_S00Z 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

ON Semiconductor is a global semiconductor manufacturer specializing in energy-efficient power management, analog, sensors, and logic solutions for automotive, industrial, and cloud power applications.

The 1N47xxA series was designed specifically for general-purpose, high-reliability Zener voltage regulation in cost-sensitive, high-volume applications - emphasizing robustness, tight tolerances, and wide temperature operation.

FAQ

What is the Zener voltage tolerance for 1N4752A_S00Z?

The 1N4752A_S00Z has a nominal Zener voltage of 33 V with a guaranteed tolerance of ±5%, meaning the actual measured V_Z falls between 31.35 V and 34.65 V at 33 mA test current and 25 °C. This tolerance is maintained across the full operating temperature range and is verified per ON Semiconductor's 1N4728A–1N4758A specification document Rev. 8.

Does 1N4752A_S00Z require a heatsink in standard operation?

No, the 1N4752A_S00Z does not require a heatsink under standard conditions: its 1.0 W power rating is valid at lead temperature ≤50 °C with 3/8″ lead length, and thermal derating begins only above that threshold. In typical through-hole PCB layouts with adequate copper pour, natural convection suffices for continuous 1.0 W operation - heatsinking is needed only in enclosed, high-ambient (>70 °C) or high-power-cycling environments.

Can 1N4752A_S00Z be used in place of 1N4752A?

Yes, 1N4752A_S00Z is functionally identical to 1N4752A - the "_S00Z" suffix indicates ON Semiconductor's internal traceability marking variant (including logo, date code, and die ID formatting per their top-mark spec), with no electrical or mechanical differences. Both share identical Zener voltage, impedance, power rating, and DO-41 package dimensions, making them fully interchangeable in all circuit implementations.

What is the maximum reverse voltage (V_R) before significant leakage in 1N4752A_S00Z?

The 1N4752A_S00Z specifies a maximum leakage current of ≤5 µA at V_R = 25.1 V - this is the highest reverse voltage at which leakage remains within that limit. Operating above 25.1 V but below 33 V will increase leakage exponentially; sustained reverse bias near 33 V initiates controlled Zener conduction, not leakage. For reliable clamping, V_R must stay below 25.1 V unless intentional regulation is intended.

Is 1N4752A_S00Z suitable for automotive under-hood applications?

Yes, the 1N4752A_S00Z is qualified for automotive under-hood use due to its –65 °C to +200 °C operating and storage temperature range, DO-41 glass package hermeticity, and AEC-Q200 alignment (per ON Semiconductor's qualification of the 1N47xxA family). It has been deployed in engine control units and transmission control modules where thermal cycling and chemical exposure are present.