NXP Semiconductors BZX284-C15,115

Overview

BZX284-C15,115 from NXP Semiconductors is a ±5% tolerance Zener voltage regulator diode in a SOD110 ceramic SMD package, rated for 15 V nominal working voltage at 5 mA test current, 400 mW total power dissipation, and 25 Ω typical differential resistance at 5 mA. It serves as a precision low-power voltage reference in power supply feedback paths, overvoltage protection circuits, and analog signal conditioning stages.

For engineers reviewing the BZX284-C15,115 datasheet, BZX284-C15,115 pinout, BZX284-C15,115 application, or BZX284-C15,115 equivalent, key selection criteria include its 15 V Zener voltage with ±5% tolerance, 25 Ω dynamic impedance at 5 mA, 50 nA reverse leakage at 0.7 × V_Znom, SOD110 footprint compatibility, and thermal resistance of 315 K/W under standard PCB mounting conditions.

Technical Context

The BZX284-C15,115 operates as a silicon planar Zener diode optimized for stable reverse-bias regulation in low-current (<250 mA continuous forward, <12 A non-repetitive surge) applications. Its junction temperature range spans −65 °C to +150 °C, and it exhibits a positive temperature coefficient of +11.4 mV/K at 5 mA, enabling predictable drift behavior in thermally varying environments.

Designed for surface-mount assembly on standard FR-4 PCBs (11 × 25 × 1.6 mm), the device relies on thermal conduction through its ceramic body and solder joints. Its 1.9–2.1 mm body length and 1.1–1.4 mm width align with JEDEC SOD110 mechanical standards, ensuring automated placement compatibility without requiring custom tooling.

Key Specifications

Pinout & Package

SOD110 is a two-terminal surface-mount ceramic package with cathode marked by a band on the top surface. Terminals are unidirectional: anode (pin 1) and cathode (pin 2). No internal bonding wires or auxiliary pins - strictly a passive two-terminal Zener structure.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MMBZ5245B,115 and BZX84-C15,115, the BZX284-C15,115 delivers superior thermal performance (315 K/W vs. ≥400 K/W) and lower leakage (50 nA vs. ≥100 nA), making it preferable for thermally constrained or high-precision analog applications despite its larger SOD110 footprint.

Availability

BZX284-C15,115 is available at Aetrix Electronics and suitable for power supply feedback references, overvoltage clamp protection, ADC reference voltage sources, and comparator threshold generators requiring stable component supply and long-term manufacturability.

Supply support for BZX284-C15,115 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

NXP Semiconductors is a global semiconductor company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and IoT applications.

The BZX284 series was designed specifically for low-power, high-stability voltage regulation in space-constrained SMD applications, emphasizing ceramic package reliability, tight parametric consistency across E24 voltage grades, and robust thermal performance on standard PCBs.

FAQ

What is the nominal Zener voltage and tolerance of the BZX284-C15,115?

The BZX284-C15,115 has a nominal Zener voltage of 15 V with a ±5% tolerance, meaning its actual breakdown voltage falls between 14.25 V and 15.75 V at 5 mA test current. This tolerance is confirmed in Table 1 of the NXP datasheet and applies specifically to the "C" series variant. The BZX284-C15,115 is not rated for ±2% tolerance - that specification belongs exclusively to the BZX284-B15 variant.

What is the maximum continuous power dissipation for the BZX284-C15,115?

The BZX284-C15,115 has a maximum total power dissipation of 400 mW at ambient temperature of 25 °C, as specified in the Limiting Values table. This rating assumes mounting on a standard 11 × 25 × 1.6 mm FR-4 PCB. Derating is required above 25 °C ambient, following the 315 K/W thermal resistance value - for example, at 75 °C ambient, maximum allowable power drops to approximately 250 mW.

What is the differential resistance of the BZX284-C15,115 and why does it matter?

The BZX284-C15,115 has a typical differential resistance of 25 Ω at 5 mA Zener test current, per Table 1. This parameter quantifies how much the Zener voltage changes with current variation - a lower value indicates better regulation stability under load shifts. In practice, this means a 1 mA change in Zener current causes ~25 mV shift in output voltage, directly impacting accuracy in feedback loops and reference circuits.

What package type does the BZX284-C15,115 use and what are its key mechanical dimensions?

The BZX284-C15,115 uses the SOD110 ceramic surface-mount package, defined in the Package Outline section. Its body measures 1.90–2.10 mm in length (D), 1.10–1.40 mm in width (E), and up to 1.6 mm in height (A), with cathode identification via a band on the top surface. These dimensions are standardized per JEDEC and ensure compatibility with automated pick-and-place equipment calibrated for SOD110 footprints.

What is the reverse leakage current specification for the BZX284-C15,115?

The BZX284-C15,115 has a maximum reverse leakage current of 50 nA at V_R = 10.5 V (0.7 × V_Znom), as stated in the Electrical Characteristics table. This low leakage is critical in high-impedance applications such as voltage divider-based references or comparator thresholds, where even nanoamp-level currents can introduce measurable offset errors. It is significantly lower than leakage values for higher-voltage variants in the same series.