Nexperia USA Inc. BZX79-B15,113

Overview

BZX79-B15,113 from Nexperia is a ±2% tolerance Zener voltage regulator diode with nominal 15 V breakdown voltage at 5 mA test current, 50 Ω typical differential resistance, and −65 °C to +200 °C junction temperature range. It operates as a low-power voltage reference in bias networks, power supply feedback paths, and overvoltage protection circuits for industrial sensor interfaces and microcontroller I/O conditioning.

For engineers reviewing the BZX79-B15,113 datasheet, BZX79-B15,113 pinout, BZX79-B15,113 application, or BZX79-B15,113 equivalent, key selection criteria include Zener voltage tolerance (±2%), thermal resistance (380 K/W), non-repetitive peak reverse power (40 W), and DO-35 package compatibility with through-hole PCB assembly and manual rework.

Technical Context

This device functions as a two-terminal silicon Zener diode operating in reverse breakdown mode, with voltage regulation achieved via controlled avalanche or Zener tunneling depending on nominal voltage. Its 15 V nominal working voltage places it in the medium-voltage avalanche-dominated region, exhibiting a positive temperature coefficient of +9.2 to +13.0 mV/K at 5 mA test current.

The SOD27 (DO-35) hermetically sealed glass package ensures stable long-term voltage drift and low leakage (<50 nA at 0.7×V_Znom). Thermal performance is defined by junction-to-ambient resistance of 380 K/W under standard mounting conditions (lead length ≤8 mm, no metallization pad).

Key Specifications

Pinout & Package

Hermetically sealed glass SOD27 (DO-35) package with axial leads; cathode indicated by a black band on the glass body. Leads are tinned copper-clad steel, suitable for SnPb and Pb-free soldering processes.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 1N4744A and BZX84-C15, BZX79-B15,113 delivers tighter voltage tolerance, lower dynamic impedance, and higher surge capability in a proven through-hole package-making it optimal for industrial-grade analog references requiring long-term stability and repairability.

Availability

BZX79-B15,113 is available at Aetrix Electronics and suitable for industrial sensor signal conditioning, microcontroller I/O protection, and linear power supply feedback requiring stable component supply across multi-year production cycles.

Supply support for BZX79-B15,113 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 leader in discrete semiconductors, formed in 2017 from the former NXP Standard Products division, with core expertise in high-volume, high-reliability diodes, MOSFETs, and logic devices.

The BZX79 series belongs to Nexperia's legacy Zener voltage regulator portfolio, engineered specifically for cost-sensitive, high-reliability industrial and automotive applications demanding stable voltage references in through-hole packages.

FAQ

What is the maximum continuous power dissipation for BZX79-B15,113 at 70 °C ambient?

At 70 °C ambient, the device must be derated from its 500 mW rating at 50 °C. Using the 380 K/W thermal resistance, junction temperature would exceed 200 °C at full power. Derated power is approximately 320 mW to maintain T_j ≤ 175 °C, calculated via P = (T_jmax − T_amb) / R_{th j-a}.

Does BZX79-B15,113 support Pb-free soldering processes?

Yes, the SOD27 package uses tinned copper-clad steel leads qualified for both SnPb and Pb-free reflow profiles. Peak temperature exposure up to 260 °C for 10 seconds is supported per J-STD-020, with no degradation to Zener voltage or leakage performance.

How does temperature affect the 15 V Zener voltage in practical operation?

At 5 mA test current, the temperature coefficient ranges from +9.2 to +13.0 mV/K. Over −40 °C to +125 °C, this results in a total shift of approximately +1.6 V to +1.9 V, meaning the actual regulation voltage increases linearly with junction temperature.

Can BZX79-B15,113 replace BZX79-C15 in existing designs?

Yes, but with trade-offs: BZX79-B15,113 offers ±2% tolerance versus ±5% for the 'C' version, improving reference accuracy. However, its tighter tolerance may increase cost and reduce availability in high-volume commodity builds where ±5% suffices.