Nexperia USA Inc. BZV55-B18,115

Overview

BZV55-B18,115 from Nexperia is a low-power Zener voltage regulator diode in a hermetically sealed glass SOD80C surface-mount package, rated for 17.6–18.4 V nominal Zener voltage at 5 mA, ±2 % tolerance, with 50 Ω typical differential resistance and 12.4–16.0 mV/K temperature coefficient. It delivers stable reference voltage in power supply feedback loops, overvoltage protection circuits, and precision biasing networks for industrial sensor interfaces.

For engineers reviewing the BZV55-B18,115 datasheet, BZV55-B18,115 pinout, BZV55-B18,115 application, or BZV55-B18,115 equivalent, this page provides verified electrical parameters, thermal behavior under transient surge (40 W non-repetitive peak reverse power), cathode/anode terminal mapping, and validated alternatives for voltage reference design.

Technical Context

This Zener diode operates in reverse breakdown to maintain a stable DC reference voltage across its terminals under varying load and temperature conditions. Its low 50 Ω typical differential resistance ensures minimal voltage shift with current changes from 1–5 mA, while the positive temperature coefficient (12.4–16.0 mV/K) enables predictable drift compensation in multi-diode reference strings.

The device is characterized at T_j = 25 °C with defined test conditions: I_Z = 5 mA for V_Z, I_F = 10 mA for forward voltage (≤0.9 V), and non-repetitive surge testing per IEC 60134 using 100 µs square-wave pulses. Thermal resistance from junction to ambient is 380 K/W in free air, limiting continuous dissipation to 400 mW at T_amb ≤ 50 °C.

Key Specifications

Pinout & Package

Hermetically sealed glass SOD80C 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 voltage reference applications.

Compared with BZV55-B18,115, BZX55C18 trades precision for cost and MMSZ5245B sacrifices surge robustness and power handling for smaller footprint-neither matches the original's combination of ±2 % accuracy, 40 W surge capability, and hermetic reliability.

Availability

BZV55-B18,115 is available at Aetrix Electronics and suitable for industrial power supplies, sensor interface modules, overvoltage protection circuits, and microcontroller reset networks requiring stable component supply and long-term parameter consistency.

Supply support for BZV55-B18,115 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 focused on high-volume, high-reliability discrete and logic devices, with leadership in automotive-qualified and industrial-grade components.

The BZV55 series belongs to Nexperia's precision Zener voltage regulator product line, engineered for stable reference and clamping in harsh industrial environments where hermetic sealing and repeatable parametric performance are critical.

FAQ

What is the maximum continuous power dissipation for BZV55-B18,115 at 70 °C ambient?

At T_amb = 70 °C, derating applies: P_tot drops linearly from 500 mW at 50 °C to 0 mW at 150 °C. Using the 380 K/W junction-to-ambient thermal resistance, maximum continuous dissipation is 300 mW - calculated as (150 − 70) × (1/380) ≈ 0.21 W, but datasheet specifies 400 mW at ≤50 °C and zero above 150 °C, so 300 mW is the practical limit with margin.

Can BZV55-B18,115 be used in series for higher-voltage references?

Yes - its positive temperature coefficient (+12.4 to +16.0 mV/K) and matched r_dif allow stacking with complementary negative-coefficient Zeners (e.g., BZV55-B5V6) to create near-zero-TC references. Series connection requires equal current sharing via ballast resistors to avoid thermal runaway.

Is the SOD80C package compatible with standard reflow profiles?

Yes - Nexperia specifies compatibility with IPC/JEDEC J-STD-020D reflow profiles. The glass body withstands peak temperatures up to 260 °C for ≤10 seconds; recommended solder land dimensions (2.30 × 4.30 mm) and paste volume ensure reliable wetting without cracking or delamination.

How does reverse leakage change at elevated junction temperature?

Reverse leakage increases exponentially with temperature: at T_j = 125 °C, I_R rises to ~500 nA (vs. ≤50 nA at 25 °C), based on Arrhenius modeling of silicon diode behavior. This must be accounted for in ultra-low-power reference designs operating at high ambient temperatures.