Nexperia USA Inc. BZT52-C24J

Overview

BZT52-C24J from Nexperia is a Zener voltage regulator diode in SOD123 package, designed for precision voltage reference and overvoltage protection in low-power analog and digital circuits. It provides a nominal 24 V Zener voltage at 5 mA, ±5 % tolerance, 220 Ω differential resistance, and 590 mW total power dissipation - suitable for biasing, signal clamping, and supply rail stabilization in industrial sensor interfaces.

For engineers reviewing the BZT52-C24J datasheet, BZT52-C24J pinout, BZT52-C24J application, or BZT52-C24J equivalent, key selection criteria include Zener voltage accuracy at I_Z = 5 mA, thermal resistance (R_th(j-sp) = 55 K/W), reverse current < 0.05 μA at V_R = 19.2 V, and SOD123 surface-mount compatibility with standard reflow profiles.

Technical Context

This device operates as a two-terminal shunt voltage regulator, maintaining stable output voltage across varying load currents by conducting reverse breakdown current above its specified V_Z. Its temperature coefficient of +16.8 mV/K at I_Z = 5 mA enables predictable drift compensation in temperature-sensitive references.

The SOD123 package supports high-density PCB layouts with low thermal resistance to solder point (55 K/W), enabling reliable operation up to 150 °C junction temperature. Reverse recovery is not specified, confirming its use in DC/low-frequency regulation-not switching applications.

Key Specifications

Pinout & Package

SOD123 plastic surface-mount package: 2-lead, flat lead, cathode-marked with bar; dimensions 3.75 mm × 1.7 mm × 1.3 mm (L × W × H); optimized for automated placement and reflow soldering per IPC-7095 guidelines.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MMBZ5249BS and BZX84-C24, BZT52-C24J delivers superior thermal robustness (55 K/W R_th(j-sp)) and higher continuous power margin (590 mW), making it preferred for industrial-grade regulation where ambient temperature and long-term reliability are critical.

Availability

BZT52-C24J is available at Aetrix Electronics and suitable for industrial sensor interfaces, USB port protection, PLC input conditioning, and DC-DC feedback stabilization requiring stable component supply with full traceability and long-lifecycle support.

Supply support for BZT52-C24J 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 ISO/TS 16949-certified manufacturing.

BZT52 series belongs to Nexperia's general-purpose Zener diode product line, engineered for cost-effective, surface-mount voltage regulation and protection in non-automotive industrial and commercial applications.

FAQ

What is the Zener test current for BZT52-C24J, and why does it matter?

The Zener voltage is specified at I_Z = 5 mA, which establishes the reference operating point for datasheet parameters including V_Z, r_dif, and temperature coefficient. Operating significantly above or below this current shifts V_Z due to dynamic resistance and tempco effects - design must ensure bias networks deliver stable 5 mA under all expected load and temperature conditions.

Can BZT52-C24J be used in place of a 24 V Zener with tighter tolerance?

No - BZT52-C24J has ±5 % tolerance (22.8 V to 25.6 V), whereas tighter-tolerance alternatives like BZT52-B24 (±2 %, 23.5 V to 24.5 V) exist in the same series. Substituting without verifying system-level voltage margin may cause regulation failure or excessive power dissipation in precision applications.

How does the SOD123 package affect thermal performance compared to DO-35?

SOD123 offers lower R_th(j-sp) (55 K/W) than axial DO-35 (typically > 200 K/W), enabling higher continuous power in compact layouts. However, its thermal path relies entirely on PCB copper; insufficient cathode pad area (>1 cm²) degrades performance, unlike DO-35's radial heat conduction through leads.

Is BZT52-C24J qualified for automotive applications?

No - per Nexperia's revision history (Rev. 2, Oct 2025), C-series devices are explicitly non-automotive qualified. For automotive use, select the −Q qualified variants (e.g., BZT52-C24-Q) which undergo AEC-Q101 stress testing and have controlled parametric distributions.