Nexperia USA Inc. BZX84-C8V2,235

Overview

BZX84-C8V2,235 from Nexperia is a ±5 % tolerance Zener voltage regulator diode in SOT23 (TO-236AB) package, rated for 8.2 V nominal breakdown voltage at 5 mA, 250 mW total power dissipation, and 150 °C maximum junction temperature - used for precision low-power voltage reference and overvoltage protection in DC power rails.

For engineers reviewing the BZX84-C8V2,235 datasheet, BZX84-C8V2,235 pinout, BZX84-C8V2,235 application, or BZX84-C8V2,235 equivalent, key selection criteria include its 7.7–8.7 V Zener voltage range at I_Z = 5 mA, 80 Ω typical differential resistance, 0.7 μA reverse current at V_R = 6.56 V, +3.2 to +6.2 mV/K temperature coefficient, and non-repetitive peak reverse power handling up to 40 W.

Technical Context

This discrete Zener diode operates in reverse-biased avalanche breakdown mode to maintain stable voltage across load variations and supply fluctuations. Its design targets low-current regulation (IZ = 5 mA nominal), with thermal resistance from junction to ambient of 500 K/W on FR4 PCB.

The device exhibits a positive temperature coefficient (+3.2 to +6.2 mV/K) above 6 V, enabling predictable drift compensation in temperature-sensitive references. It supports pulse operation up to 100 μs with peak reverse power of 40 W, constrained by absolute maximum T_j = 150 °C and T_amb = −55 to +150 °C.

Key Specifications

Pinout & Package

Package: SOT23 (TO-236AB), 3-lead surface-mount plastic package with standard footprint per Figure 12 (reflow) and Figure 13 (wave soldering); dimensions per Figure 11.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MMBZ5231BS, BZX84-C8V2,235 offers superior regulation stability (80 Ω vs. 300 Ω r_dif); versus BZX84-C8V2-E3-08, it trades 50 mW P_tot for Nexperia's tighter thermal resistance control (R_th(j-a) = 500 K/W) and documented surge robustness.

Availability

BZX84-C8V2,235 is available at Aetrix Electronics and suitable for industrial sensor nodes, battery-powered IoT endpoints, factory automation interface protection, and microcontroller reset circuits requiring stable component supply with full traceability and lifecycle management.

Supply support for BZX84-C8V2,235 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, serving automotive, industrial, and consumer markets with scalable manufacturing and rigorous quality systems.

The BZX84 series belongs to Nexperia's general-purpose Zener diode product line, engineered for cost-sensitive, space-constrained applications demanding reliable voltage regulation and transient suppression in SMT designs.

FAQ

What is the maximum continuous Zener current for BZX84-C8V2,235 at 70 °C ambient?

At T_amb = 70 °C, derating applies from the 250 mW base rating. With R_th(j-a) = 500 K/W, junction temperature rise is 15,000 K·mW. At 70 °C ambient, max allowable P_tot = (150 − 70) °C / 500 K/W = 160 mW. Thus, max continuous I_Z = 160 mW / 8.2 V ≈ 19.5 mA - verified per thermal derating curve in Section 9.

Can BZX84-C8V2,235 be used in place of a 5.1 V Zener for overvoltage protection?

No - BZX84-C8V2,235 has a nominal Zener voltage of 8.2 V (7.7–8.7 V range) and is not interchangeable with 5.1 V devices like BZX84-C5V1. Substituting would raise clamping voltage by ~3.1 V, risking damage to 5 V-rated ICs. Always match V_Z to system rail tolerance and protection thresholds.

Does the n.c. pin (pin 2) require PCB routing or grounding?

No - pin 2 is internally not connected and must remain unconnected on the PCB. Routing or grounding it may cause mechanical stress on the bond wire or introduce parasitic coupling. The SOT23 footprint in Figure 12 explicitly omits copper for pin 2, confirming its isolation.

How does temperature affect regulation accuracy over −40 °C to +125 °C?

With a +3.2 to +6.2 mV/K temperature coefficient, V_Z increases by 0.51–0.99 V across this 165 °C span. At I_Z = 5 mA, this yields a total drift of +6.2 % to +12.1 % relative to 8.2 V - confirmed by Fig. 7 data for BZX84-C8V2. For stable references, active compensation or tighter-tolerance variants (BZX84-B8V2) are recommended.