Nexperia USA Inc. BZV55-B51,115

Overview

BZV55-B51,115 from Nexperia is a 51 V ±2 % tolerance Zener voltage regulator diode in a hermetically sealed glass SOD80C surface-mount package, rated for 500 mW total power dissipation and 40 W non-repetitive peak reverse power (tp = 100 µs), used for precision low-power voltage reference and regulation in analog sensor interfaces and power supply feedback loops.

For engineers reviewing the BZV55-B51,115 datasheet, BZV55-B51,115 pinout, BZV55-B51,115 application, or BZV55-B51,115 equivalent, this page delivers verified electrical parameters, thermal behavior, SOD80C footprint details, and real-world use cases - all extracted from Nexperia's official Rev. 5 product data sheet dated 26 January 2011.

Technical Context

This Zener diode operates in reverse breakdown with a nominal working voltage of 51 V at I_Z = 2 mA, exhibiting a typical differential resistance of 90 Ω and a temperature coefficient of +60 mV/K. Its low capacitance (40 pF at f = 1 MHz, V_R = 0 V) supports stable regulation in high-frequency feedback paths.

Designed for operation up to T_j = 200 °C and storage down to −65 °C, it features R_th(j-a) = 380 K/W (free air) and R_th(j-sp) = 300 K/W, enabling reliable thermal performance on standard FR-4 PCBs without heatsinking under continuous 400 mW load 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 regulation applications.

Compared with BZX55C51,113 and MMBZ5257BS,115, the BZV55-B51,115 uniquely combines ±2 % tolerance, 500 mW power capability, and hermetic glass reliability - making it optimal for industrial-grade voltage references where long-term drift and surge resilience are prioritized over footprint minimization.

Availability

BZV55-B51,115 is available at Aetrix Electronics and suitable for industrial sensor conditioning, switch-mode power supply feedback, overvoltage protection clamps, and low-power analog reference circuits requiring stable component supply across extended temperature ranges and multi-year production cycles.

Supply support for BZV55-B51,115 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 solutions with focus on efficiency, miniaturization, and robustness for industrial, automotive, and consumer markets.

The BZV55 series belongs to Nexperia's precision Zener regulator portfolio, engineered specifically for stable, low-power voltage reference and regulation in space-constrained, thermally demanding applications where hermetic sealing and tight tolerance are mandatory.

FAQ

What is the maximum continuous reverse power dissipation for BZV55-B51,115 at 70 °C ambient?

At T_amb = 70 °C, the device must be derated linearly from its 500 mW rating at 50 °C. With R_th(j-a) = 380 K/W, junction temperature would exceed 200 °C at full power; therefore, maximum continuous reverse power is 200 mW to maintain T_j ≤ 150 °C per Nexperia's recommended operating conditions.

Can BZV55-B51,115 replace TL431 in feedback circuits?

Yes, but only in non-isolated, low-current applications (<1 mA Zener current). Unlike TL431, it lacks active error amplification and adjustable reference; however, its 51 V ±2 % accuracy, low r_dif, and 40 pF capacitance make it suitable as a passive shunt reference where simplicity and reliability outweigh programmability needs.

Is the SOD80C package compatible with standard reflow soldering profiles?

Yes - Nexperia specifies compatibility with JEDEC J-STD-020D reflow profiles. The SOD80C outline (Fig 7) supports peak temperatures up to 260 °C for ≤10 seconds, with thermal resistance data confirming safe operation when soldered per recommended footprint (2.30 mm × 4.30 mm lands, 0.90 mm solder paste openings).

How does the +60 mV/K temperature coefficient impact regulation accuracy over −40 °C to +125 °C?

Across that 165 K range, the coefficient causes ~9.9 V total drift (60 mV/K × 165 K). However, since V_Z = 51 V, this represents ~19.4 % relative change - mitigated in practice by using series resistors to bias near I_Z = 5 mA (where S_Z drops to +40 mV/K) or by pairing with NTC compensation networks per Figure 4 guidance.