Nexperia USA Inc. BZX84-C5V1,235

Overview

BZX84-C5V1,235 from Nexperia is a ±5 % tolerance Zener voltage regulator diode in SOT23 (TO-236AB) package, rated for 5.1 V nominal breakdown voltage at 5 mA, 250 mW total power dissipation, and 40 W non-repetitive peak reverse power. It serves as a precision reference or overvoltage clamp in low-power analog signal conditioning and power rail stabilization circuits.

For engineers reviewing the BZX84-C5V1,235 datasheet, BZX84-C5V1,235 pinout, BZX84-C5V1,235 application, or BZX84-C5V1,235 equivalent, key selection criteria include Zener voltage tolerance (±5 %), thermal resistance (330 K/W junction-to-solder point), differential resistance (480 Ω max at 5 mA), temperature coefficient (+1.2 mV/K), and SOT23-compatible footprint for high-density PCB layouts.

Technical Context

This device operates in reverse-bias breakdown mode to maintain stable voltage across its cathode-anode terminals under varying load or supply conditions. Its Zener voltage is specified at I_Z = 5 mA with typical temperature coefficient of +1.2 mV/K and maximum differential resistance of 480 Ω - indicating moderate regulation sensitivity to current changes.

The SOT23 package enables surface-mount integration with defined thermal path to solder point (R_th(j-sp) = 330 K/W) and ambient (R_th(j-a) = 500 K/W), supporting operation from −55 °C to +150 °C ambient and up to 150 °C junction temperature.

Key Specifications

Pinout & Package

Package: SOT23 (TO-236AB), 3-lead surface-mount plastic package with standard FR4 footprint (2.8 mm × 1.4 mm body, 0.95 mm height).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MMBZ5221BS-7-F, BZX84-C5V1,235 offers 11 % higher power rating and 20 % lower dynamic impedance for improved regulation stability; compared with BZX84-C5V1,215, it provides identical electrical behavior with optimized logistics for medium-batch manufacturing runs.

Availability

BZX84-C5V1,235 is available at Aetrix Electronics and suitable for power supply rail clamping, low-power reference generation, and microcontroller reset circuitry requiring stable component supply with consistent Zener voltage tolerance and SOT23 footprint compatibility.

Supply support for BZX84-C5V1,235 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, with leadership in automotive-qualified and industrial-grade components.

The BZX84 series belongs to Nexperia's precision Zener diode product line, engineered for cost-sensitive, space-constrained applications demanding stable voltage regulation across consumer, industrial, and computing systems.

FAQ

What is the maximum continuous reverse current this diode can handle at 25 °C ambient?

At T_amb = 25 °C, the BZX84-C5V1,235 supports a maximum continuous reverse current of approximately 49 mA, calculated from its 250 mW total power dissipation rating and nominal 5.1 V Zener voltage (I_Z(max) = P_tot/V_Z). Derating is required above 25 °C per its 500 K/W junction-to-ambient thermal resistance.

Can Pin 2 be connected to ground or left floating in PCB layout?

Pin 2 is internally not connected (n.c.) and must remain unconnected on the PCB - neither grounded nor tied to any net. Connecting it risks mechanical stress on the internal bond wire or unintended parasitic coupling; the official Nexperia package outline confirms no internal connection exists at this terminal.

How does the +1.2 mV/K temperature coefficient affect long-term voltage stability?

The +1.2 mV/K coefficient means the Zener voltage increases by ~6 mV over a 5 K ambient rise (e.g., from 25 °C to 30 °C). This predictable positive drift allows compensation in reference circuits but limits use in ultra-stable applications where <10 ppm/°C stability is required without external correction.

Is this part suitable for automotive applications?

No - the BZX84-C5V1,235 is explicitly designated as non-automotive qualified per Nexperia's revision history (Rev. 7, January 2023). It lacks AEC-Q101 qualification, automotive-grade screening, and extended temperature validation. For automotive use, select the BZX84-Q series variants offered by Nexperia.