NXP Semiconductors BZX284-C47,115

Overview

BZX284-C47,115 from NXP Semiconductors is a ±5% tolerance Zener voltage regulator diode in SOD110 ceramic SMD package, rated for 47 V nominal working voltage at 2 mA test current, 400 mW total power dissipation, and 315 K/W junction-to-ambient thermal resistance - used for precision low-power voltage reference and overvoltage protection in sensor signal conditioning circuits.

For engineers reviewing the BZX284-C47,115 datasheet, BZX284-C47,115 pinout, BZX284-C47,115 application, or BZX284-C47,115 equivalent, key selection considerations include its 47 V Zener voltage tolerance (±5%), differential resistance of 45 Ω at 2 mA, temperature coefficient of +30 mV/K, reverse leakage of ≤50 nA at 32.9 V, and SOD110 footprint compatibility with space-constrained PCB layouts.

Technical Context

The BZX284-C47,115 operates as a two-terminal passive voltage reference, relying on controlled reverse breakdown in silicon PN junction. Its regulation performance is defined at 2 mA test current per IEC 60134 limiting values, with thermal derating above 25 °C ambient due to 315 K/W R_{th j-a}.

It exhibits a positive temperature coefficient (+30 mV/K) typical for Zeners above 5.6 V, enabling stable reference generation across −65 °C to +150 °C storage range and up to 150 °C junction temperature - consistent with Table 2 specifications for BZX284-B/C47 devices.

Key Specifications

Pinout & Package

SOD110 package: ultra-compact ceramic surface-mount outline with two terminals - anode (pin 1) and cathode (pin 2), marked by cathode band on top surface per Fig.1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX284-C47,115, the BZT52-C47 offers higher power margin in a slightly larger SMD package, while the NZX47C provides through-hole reliability and extended thermal range - neither is pin-compatible, but all three deliver matched 47 V ±5% regulation for system-level voltage supervision.

Availability

BZX284-C47,115 is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive body electronics, medical monitoring systems, and IoT edge nodes requiring stable component supply with guaranteed long-term sourcing.

Supply support for BZX284-C47,115 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 markets.

The BZX284 series was designed as a high-stability, low-power Zener family for precision voltage reference and transient suppression in space-constrained SMD applications - emphasizing ceramic reliability, tight E24 voltage grading, and robust thermal performance.

FAQ

What is the Zener voltage tolerance and test condition for BZX284-C47,115?

The BZX284-C47,115 has a ±5% Zener voltage tolerance, specified as 46.1 V minimum to 47.9 V maximum at a test current of 2 mA. This tolerance band is defined per Table 2 of the NXP datasheet and applies strictly under the stated I_Z = 2 mA condition - deviation occurs at lower or higher currents due to differential resistance and temperature effects.

Does BZX284-C47,115 support reflow soldering, and what is its maximum junction temperature?

Yes, BZX284-C47,115 is qualified for standard lead-free reflow soldering per JEDEC J-STD-020. Its absolute maximum junction temperature is 150 °C, and thermal resistance from junction to ambient is 315 K/W when mounted on a 11 × 25 × 1.6 mm PCB - meaning sustained operation above 75 °C ambient requires derating or additional copper heatsinking to avoid exceeding T_j limits.

What is the reverse leakage current specification for BZX284-C47,115, and at what voltage is it measured?

The reverse leakage current for BZX284-C47,115 is specified as ≤50 nA, measured at V_R = 32.9 V (0.7 × V_Znom = 0.7 × 47 V). This value appears in Table 2 of the NXP datasheet under "IR" for types BZX284-B/C27 to B/C75 and reflects worst-case leakage under partial reverse bias - critical for low-power reference divider accuracy.

How does the temperature coefficient of BZX284-C47,115 affect its voltage stability over temperature?

The BZX284-C47,115 has a typical temperature coefficient of +30 mV/K, meaning its Zener voltage increases by ~30 mV per degree Celsius rise in junction temperature. At 47 V nominal, this equates to ~640 ppm/°C drift - a predictable, linear shift that can be compensated in precision circuits using complementary negative-TC components or calibration algorithms.

Is BZX284-C47,115 suitable for use as a voltage reference in high-impedance analog circuits?

Yes, BZX284-C47,115 is well-suited for high-impedance analog reference applications due to its low reverse leakage (≤50 nA at 32.9 V) and stable differential resistance (45 Ω typ). When biased at 2 mA with appropriate series resistance, it delivers low-noise, predictable regulation - though for ultra-high-precision needs, active references or bandgap ICs may offer better initial accuracy and TC performance than the BZX284-C47,115 alone.