Nexperia USA Inc. BZV55-C43,115

Overview

BZV55-C43,115 from Nexperia is a ±5% tolerance silicon Zener diode in a hermetically sealed SOD80C glass SMD package, rated for 43 V nominal Zener voltage at 5 mA, 400 mW total power dissipation at T_amb ≤ 50 °C, and 40 W non-repetitive peak reverse power (100 µs square wave). It serves as a precision low-power voltage reference or regulation element in biasing, overvoltage protection, and signal-level clamping circuits.

For engineers reviewing the BZV55-C43,115 datasheet, BZV55-C43,115 pinout, BZV55-C43,115 application, or BZV55-C43,115 equivalent, key selection criteria include Zener voltage tolerance (±5%), differential resistance (85 Ω typ. at I_Z = 2 mA), temperature coefficient (+45 mV/K typ.), junction-to-ambient thermal resistance (380 K/W), and SOD80C package compatibility with reflow soldering.

Technical Context

This Zener diode operates in reverse breakdown to maintain stable voltage across its terminals under controlled current conditions. Its 43 V nominal Zener voltage is specified at I_Z = 2 mA, with a typical differential resistance of 85 Ω and a positive temperature coefficient of +45 mV/K - indicating voltage increases with junction temperature.

The device uses a planar epitaxial construction in a hermetically sealed glass package, enabling reliable operation up to 200 °C junction temperature and supporting non-repetitive surge handling up to 40 W for 100 µs pulses. Its capacitance is 40 pF at 0 V and 1 MHz, suitable for low-frequency regulation rather than high-speed signal clamping.

Key Specifications

Pinout & Package

Hermetically sealed glass SOD80C surface-mount package: 3.3–3.7 mm length, 1.45–1.60 mm width, 0.3 mm height; cathode indicated by marking band.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZV55-C43,115, MMBZ5256BS-7-F offers smaller footprint but reduced power handling and regulation stiffness, while BZX55-C43 provides higher steady-state power and axial form factor at the expense of SMD compatibility and thermal resistance (R_th(j-a) ≈ 500 K/W vs. 380 K/W).

Availability

BZV55-C43,115 is available at Aetrix Electronics and suitable for industrial sensor interfaces, programmable logic controller (PLC) I/O conditioning, and embedded power management requiring stable component supply with traceable sourcing and long-lifecycle support.

Supply support for BZV55-C43,115 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

Nexperia is a global semiconductor expert delivering high-performance, reliable discrete, logic, and MOSFET devices with focus on efficiency, reliability, and miniaturization for automotive, industrial, and consumer markets.

The BZV55 series belongs to Nexperia's precision Zener diode product line, engineered for stable low-power voltage regulation and reference applications in space-constrained SMD designs where hermetic sealing and thermal robustness are essential.

FAQ

What is the maximum continuous reverse current this diode can handle at 43 V?

The BZV55-C43,115 is not rated for continuous reverse current at full Zener voltage. Its maximum steady-state power dissipation is 400 mW at T_amb ≤ 50 °C, limiting continuous Zener current to approximately 9.3 mA (400 mW ÷ 43 V). Exceeding this requires thermal derating per the R_th(j-a) = 380 K/W specification.

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

Yes - multiple BZV55-C43,115 diodes may be connected in series to achieve higher reference voltages (e.g., two in series yield ~86 V), but voltage matching tolerance (±5%) and thermal tracking differences between units must be accounted for in precision applications; parallel connection is not recommended due to mismatched breakdown characteristics.

Does the SOD80C package support automated optical inspection (AOI)?

Yes - the SOD80C's hermetically sealed glass body, consistent marking band location, and defined solder pad footprint (per Nexperia's Figure 7 reflow footprint) enable reliable AOI detection of placement, polarity, and solder joint quality in high-volume SMT lines.

How does the +45 mV/K temperature coefficient affect long-term stability?

The +45 mV/K coefficient means the Zener voltage increases by ~1.9 V over a 42 °C junction rise (e.g., from 25 °C to 67 °C). For applications requiring <1% voltage drift, ambient temperature control or compensation circuitry is necessary; it is not suitable for unregulated high-temperature environments without thermal management.