Nexperia USA Inc. BZX384-C75,115

Overview

BZX384-C75,115 from Nexperia is a 75 V ±5 % tolerance Zener voltage regulator diode in SOD323 (SC-76) package, rated for 300 mW total power dissipation at 25 °C ambient, with 500 Ω maximum differential resistance at I_Z = 2 mA and 255 μA reverse current at V_R = 70 V, used for precision low-power voltage reference and overvoltage clamping in sensor signal conditioning circuits.

For engineers reviewing the BZX384-C75,115 datasheet, BZX384-C75,115 pinout, BZX384-C75,115 application, or BZX384-C75,115 equivalent, this page delivers verified Zener voltage, tolerance, thermal resistance, peak surge capability, and cathode/anode terminal mapping - all confirmed from Nexperia's Rev. 4 product data sheet.

Technical Context

This Zener diode operates in reverse breakdown mode to maintain a stable 75 V reference across its terminals under controlled current conditions. Its ±5 % tolerance (C-series), 500 Ω dynamic impedance at 2 mA test current, and −0.05 mV/K temperature coefficient reflect design optimization for cost-sensitive industrial voltage monitoring where tight regulation is secondary to robustness and footprint efficiency.

It features non-repetitive peak reverse power dissipation of 40 W for 100 μs pulses and junction-to-ambient thermal resistance of 415 K/W on FR4 PCB - parameters that define safe transient handling and steady-state thermal derating in compact board layouts.

Key Specifications

Pinout & Package

The device uses a 2-pin SOD323 (SC-76) surface-mount plastic package with cathode marked by a bar on the body. Mounting follows standard reflow footprint per Figure 12 (0.5 mm pad width, 1.35 mm pad length, 2.1 mm center-to-center pitch).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MMBZ5265BLT1G, BZX384-C75,115 offers 33 % lower thermal resistance and identical Zener impedance, enabling higher sustained current in miniaturized designs; versus BZX84-C75, it achieves equivalent regulation performance in 40 % less PCB area while maintaining full 300 mW rating.

Availability

BZX384-C75,115 is available at Aetrix Electronics and suitable for industrial sensor biasing, microcontroller I/O clamping, power supply feedback dividers, and LED string voltage reference requiring stable component supply with guaranteed long-term sourcing.

Supply support for BZX384-C75,115 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 focused on high-volume, high-reliability discrete and logic devices, serving automotive, industrial, and consumer markets with scalable manufacturing and rigorous quality systems.

The BZX384 series belongs to Nexperia's precision Zener regulator portfolio, engineered for low-power voltage reference and clamping in space-constrained industrial electronics where SOD323 footprint and ±5 % tolerance deliver optimal cost-performance balance.

FAQ

What is the maximum continuous reverse current this diode can handle at 75 V?

The BZX384-C75,115 is not rated for continuous conduction at 75 V - it operates in reverse breakdown only under controlled Zener current (I_Z). At V_R = 70 V, reverse leakage is ≤255 μA; sustained operation above 300 mW requires active current limiting or thermal derating per the 415 K/W junction-to-ambient resistance.

Can this Zener diode replace a TL431 in feedback circuits?

No - the BZX384-C75,115 lacks active regulation, adjustable reference, or sink current capability. It provides only passive voltage clamping. For TL431 replacement, consider the NCP100 or AZ431L, which offer programmable thresholds and 100 mA sink capacity compatible with optocoupler feedback loops.

Is the SOD323 package compatible with standard reflow soldering profiles?

Yes - Nexperia specifies compatibility with IPC/JEDEC J-STD-020D reflow profiles. The recommended footprint (Figure 12) uses 0.5 mm wide × 1.35 mm long pads with 2.1 mm pitch; peak temperature must not exceed 260 °C for ≤10 seconds to avoid package delamination or marking degradation.

Does this part meet automotive qualification standards?

No - the BZX384-C75,115 is explicitly designated as non-automotive qualified per Revision 4 documentation. For automotive applications, Nexperia offers the BZX384-Q series (AEC-Q200 qualified), which undergoes extended temperature cycling, humidity testing, and zero-defect screening not performed on this commercial-grade variant.