Nexperia USA Inc. BZX84-A4V7,215

Overview

BZX84-A4V7,215 from Nexperia is a ±1 % tolerance Zener voltage regulator diode in SOT23 (TO-236AB) package, designed for precision low-power voltage reference and clamping in space-constrained PCBs. It delivers 4.7 V nominal breakdown at 5 mA, with 3 Ω typical differential resistance, <3 µA reverse leakage at 3.76 V, and operates across –55 °C to +150 °C ambient.

For engineers reviewing the BZX84-A4V7,215 datasheet, BZX84-A4V7,215 pinout, BZX84-A4V7,215 application, or BZX84-A4V7,215 equivalent, this part supports stable biasing in analog sensor interfaces, overvoltage protection in microcontroller I/O rails, and reference generation in low-current power management circuits where ±1 % regulation accuracy and SMT manufacturability are required.

Technical Context

This Zener diode operates in reverse breakdown mode with tightly controlled V_Z = 4.65 V to 4.75 V at I_Z = 5 mA, exhibiting a temperature coefficient of –3.5 mV/K to +0.2 mV/K. Its low 3 Ω differential resistance ensures minimal output impedance under load variation.

Designed for surface-mount assembly on FR4 PCBs with single-sided 70 µm copper, it sustains 250 mW steady-state dissipation and withstands non-repetitive 40 W surge pulses (100 µs, square wave), making it suitable for transient suppression in low-energy signal paths.

Key Specifications

Pinout & Package

SOT23 (TO-236AB) plastic surface-mounted package with 3 leads; compact 2.9 mm × 1.3 mm footprint, 1.1 mm height, and gull-wing terminations compatible with reflow and wave soldering per IPC-7351B.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MMBZ4685 and BZX84-C4V7, BZX84-A4V7,215 provides tighter V_Z control and lower dynamic impedance-critical for analog signal chains where reference stability directly impacts measurement repeatability and system-level accuracy.

Availability

BZX84-A4V7,215 is available at Aetrix Electronics and suitable for industrial sensor conditioning, microcontroller I/O protection, low-power voltage monitoring, and DC-DC converter feedback applications requiring stable component supply and long-term manufacturing continuity.

Supply support for BZX84-A4V7,215 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 logic, discrete, and MOSFET devices, serving automotive, industrial, and consumer markets with ISO/TS 16949-certified manufacturing.

The BZX84 series belongs to Nexperia's precision Zener diode product line, engineered specifically for low-power voltage regulation and clamping in space-constrained, cost-sensitive SMT designs where ±1 % to ±5 % tolerance grades meet diverse accuracy and budget requirements.

FAQ

What is the maximum continuous forward current for BZX84-A4V7,215?

The device is not rated for continuous forward conduction; its primary function is reverse-bias Zener operation. Absolute maximum forward current is 200 mA per limiting values table, but sustained forward bias exceeds design intent and risks thermal runaway. Forward voltage is specified at 0.9 V max @ 10 mA pulse test only.

Can BZX84-A4V7,215 be used in place of a 5.1 V Zener diode?

No-it is a 4.7 V nominal device with guaranteed 4.65 V to 4.75 V breakdown at 5 mA. Substituting into a 5.1 V circuit would cause undervoltage operation, potentially disabling regulation or triggering false fault detection. Use BZX84-A5V1,215 for 5.1 V applications.

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

No. Pin 2 is internally not connected and must remain electrically floating. No PCB trace, pad, or solder mask opening is required for this terminal. Including it in layout may introduce parasitic capacitance or contamination risk during assembly.

How does thermal resistance affect derating above 25 °C ambient?

R_th(j-a) is 500 K/W; at 75 °C ambient, allowable power drops to 150 mW (250 mW × (150−75)/(150−25)). Derating follows linear interpolation per JEDEC JESD51-2, requiring reduced I_Z or increased copper area to maintain junction temperature ≤150 °C.