Nexperia USA Inc. BZX79-C5V1,133

Overview

BZX79-C5V1,133 from Nexperia is a ±5% tolerance Zener voltage regulator diode with nominal 5.1 V breakdown voltage at 5 mA test current, 400–480 Ω differential resistance, and −2.7 to −0.8 mV/K temperature coefficient. It operates as a low-power voltage reference in bias networks, feedback loops, and overvoltage clamping circuits, rated for 500 mW total power dissipation at 50 °C ambient.

For engineers reviewing the BZX79-C5V1,133 datasheet, BZX79-C5V1,133 pinout, BZX79-C5V1,133 application, or BZX79-C5V1,133 equivalent, this page delivers verified electrical parameters, SOD27 package details, reverse leakage (2 μA at 2 V), thermal resistance (380 K/W), and real-world use cases in analog sensing and power rail stabilization.

Technical Context

This Zener diode functions via controlled reverse-biased avalanche breakdown, delivering stable regulation across its specified 4.8–5.4 V working voltage range. Its differential resistance of 400–480 Ω at 5 mA defines load regulation sensitivity, while the negative temperature coefficient (−2.7 to −0.8 mV/K) enables predictable drift behavior in temperature-varying environments.

Designed for low-current reference duties, it supports non-repetitive peak reverse power dissipation up to 40 W for 100 μs pulses and exhibits 300 pF junction capacitance at 0 V reverse bias and 1 MHz - critical for high-frequency noise filtering and transient response in feedback paths.

Key Specifications

Pinout & Package

Hermetically sealed axial-leaded SOD27 (DO-35) glass package with cathode indicated by a black band. Dimensions: D = 4.25 mm max, L = 25.4 mm min, b = 0.56 mm max, G1 = 1.85 mm max. Lead length ≤ 8 mm for thermal rating compliance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 1N4733A and BZX55-C5V1, BZX79-C5V1,133 delivers superior differential resistance control (400–480 Ω vs ≥500 Ω) in the compact SOD27 form factor, making it optimal for space-constrained, low-power reference designs requiring predictable regulation slope.

Availability

BZX79-C5V1,133 is available at Aetrix Electronics and suitable for power supply feedback reference, overvoltage clamp protection, and ADC voltage reference applications requiring stable component supply and consistent parametric performance across production lots.

Supply support for BZX79-C5V1,133 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, specializing in high-volume, high-reliability components for automotive, industrial, and consumer electronics markets.

The BZX79 series belongs to Nexperia's voltage regulator diode product line, engineered for cost-effective, low-power voltage referencing and clamping in space- and power-constrained analog circuits.

FAQ

What is the maximum continuous reverse current this diode can handle?

The BZX79-C5V1,133 has no specified maximum continuous reverse current; instead, its safe operating limit is defined by power dissipation. At 50 °C ambient, it supports up to 500 mW, corresponding to ~98 mA at 5.1 V. Exceeding this causes junction overheating beyond the 200 °C absolute maximum rating.

Can this Zener be used in series for higher voltage references?

Yes, multiple BZX79-C5V1,133 diodes may be stacked in series to achieve higher reference voltages, but mismatched temperature coefficients and differential resistances will degrade overall regulation accuracy and thermal stability beyond ±10% combined tolerance.

Is the SOD27 package RoHS compliant?

Yes, the SOD27 package used for BZX79-C5V1,133 meets RoHS Directive 2011/65/EU requirements, with lead-free terminations and compliant glass encapsulation - confirmed in Nexperia's official product change notices and material declarations.

How does the −2.7 to −0.8 mV/K temperature coefficient affect circuit accuracy?

This coefficient means the Zener voltage decreases by 0.8–2.7 mV per °C rise. Over a 50 °C ambient range, that introduces −40 to −135 mV drift - requiring derating or compensation in precision references, but acceptable for general-purpose biasing where ±5% tolerance already dominates error budget.