Nexperia USA Inc. 1N4742A,113

Overview

1N4742A,113 from Nexperia is a 12 V ±5 % Zener voltage regulator diode in a hermetically sealed SOD66 (DO-41) glass package, rated for 1000 mW total power dissipation and 9 Ω differential resistance at 21 mA test current, used for low-voltage stabilization in linear power supply feedback paths and reference voltage generation.

For engineers reviewing the 1N4742A,113 datasheet, 1N4742A,113 pinout, 1N4742A,113 application, or 1N4742A,113 equivalent, this part serves as a precision shunt reference with verified thermal stability (−65 °C to +200 °C junction range), axial-leaded mechanical robustness, and consistent reverse breakdown behavior under DC and pulsed conditions.

Technical Context

This Zener diode operates in reverse-biased breakdown mode to maintain a stable 12 V reference across its terminals within ±5 % tolerance, with a nominal test current of 21 mA and differential resistance of 9 Ω-enabling predictable regulation under varying load currents up to 500 mA forward/working current limit.

Its hermetically sealed SOD66 glass package provides reliable long-term stability in humid or chemically aggressive environments, while the 110 K/W junction-to-tie-point thermal resistance (4 mm lead length) supports thermal management in compact PCB layouts without forced cooling.

Key Specifications

Pinout & Package

Hermetically sealed axial-leaded SOD66 (DO-41) glass package with 2 mm diameter body and 25.4 mm overall length; cathode identified by single black band.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 1N4742A,113, the 1N4742A-T offers identical regulation performance with optimized packaging for automation, while BZX85C12 trades tighter thermal control and lower impedance for lower unit cost-making it suitable only where regulation stability is secondary to BOM cost.

Availability

1N4742A,113 is available at Aetrix Electronics and suitable for linear power supply design, overvoltage protection circuits, precision voltage reference generation, and current source biasing requiring stable component supply and traceable sourcing.

Supply support for 1N4742A,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 logic, analog, and discrete components with focus on efficiency, reliability, and miniaturization.

The 1N47xxA series belongs to Nexperia's precision Zener regulator portfolio, engineered specifically for stable DC voltage reference and clamping in cost-sensitive industrial, consumer, and automotive auxiliary systems.

FAQ

What is the maximum continuous reverse current the 1N4742A,113 can handle without degradation?

The device is rated for a working current (I_Z) of 9.1 mA at 12 V, but its absolute maximum non-repetitive peak reverse current (I_ZSM) is 380 mA. Continuous operation above 9.1 mA is permissible if power dissipation remains ≤1000 mW and junction temperature stays below +200 °C-requiring thermal derating above 50 °C ambient.

How does the SOD66 package affect soldering and board-level reliability?

The SOD66 (DO-41) glass package uses axial leads with 0.81 mm diameter and 25.4 mm length, compatible with standard through-hole reflow or wave soldering. Its hermetic seal prevents moisture-induced parameter shift, and the glass-to-metal seal withstands ≥300 °C peak solder temperatures without cracking or leakage-ensuring long-term reliability in humid environments.

Can the 1N4742A,113 replace a 1N4742 in legacy designs?

Yes-the "A" suffix denotes tightened ±5 % V_Z tolerance versus older ±10 % versions; all electrical, thermal, and mechanical specifications match the original 1N4742, including pinout, package dimensions, and power rating. No layout or schematic changes are required for drop-in replacement.

What is the typical temperature coefficient of the 1N4742A,113 near 12 V?

At 12 V, the 1N4742A exhibits a typical temperature coefficient of +0.01 %/°C (positive, low-drift region), meaning V_Z increases ~1.2 mV per °C rise. This value is confirmed in Nexperia's characterization data for the 1N4742A variant and is significantly more stable than lower-voltage Zeners (<6 V) or higher-voltage types (>15 V).