Nexperia USA Inc. BZT52H-C33,115

Overview

BZT52H-C33,115 from Nexperia is a ±5 % tolerance Zener diode in SOD123F package, rated for 33 V nominal breakdown voltage at I_Z = 2 mA, 830 mW total power dissipation at T_amb ≤ 25 °C, and 45 μA reverse current at V_R = 26.4 V. It serves as a precision voltage reference or overvoltage clamp in low-power linear regulators and analog signal conditioning circuits.

For engineers reviewing the BZT52H-C33,115 datasheet, BZT52H-C33,115 pinout, BZT52H-C33,115 application, or BZT52H-C33,115 equivalent, key selection criteria include its ±5 % V_Z tolerance, 250 Ω typical differential resistance at 2 mA, 150 °C maximum junction temperature, and compatibility with standard FR4 PCB reflow soldering per SOD123F footprint.

Technical Context

This Zener diode operates in reverse-biased breakdown mode to maintain stable voltage across load variations, with temperature coefficient of +0.05 mV/K at I_Z = 2 mA - indicating minimal drift over temperature. Its thermal resistance from junction to ambient is 330 K/W on standard FR4, limiting continuous power handling without heatsinking.

The device exhibits 250 Ω maximum differential resistance (r_dif) at 2 mA test current, ensuring predictable regulation slope, and supports non-repetitive peak reverse current up to 0.9 A for transient suppression. Reverse leakage remains below 45 μA at 80 % of V_Z, confirming tight leakage control for low-power bias networks.

Key Specifications

Pinout & Package

SOD123F is a 2-terminal surface-mount plastic package with cathode marked by a bar on the body. Mounting requires standard reflow profile per IPC-J-STD-020; cathode pad area must be ≥1 cm² for full 830 mW rating.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZT52H-C33,115, MMBZ5265BLT1G offers tighter r_dif but sacrifices 64 % power capacity, while BZX84-C33 trades regulation precision for improved noise immunity - making the BZT52H-C33,115 optimal for medium-power, thermally constrained 33 V reference or clamp roles.

Availability

BZT52H-C33,115 is available at Aetrix Electronics and suitable for industrial sensor interfaces, programmable logic controller (PLC) input protection, and embedded power supply supervision requiring stable component supply and long-term obsolescence management.

Supply support for BZT52H-C33,115 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 delivering high-performance, reliable discrete, logic, and MOSFET devices optimized for efficiency and miniaturization in industrial, consumer, and automotive applications.

The BZT52H series targets cost-sensitive, space-constrained designs needing robust Zener regulation across 2.4–75 V - emphasizing manufacturability, thermal resilience, and broad voltage coverage in standardized SMD packages.

FAQ

What is the maximum continuous reverse current the BZT52H-C33,115 can sustain at 25 °C ambient?

The device sustains up to 250 mA forward current, but for Zener operation, continuous reverse current is limited by power dissipation: at 25 °C ambient, 830 mW / 33 V ≈ 25.2 mA maximum steady-state Zener current. Exceeding this risks thermal runaway unless board-level copper area exceeds 1 cm² on cathode pad.

Does the SOD123F package require special soldering profiles?

Yes - only reflow soldering is recommended per Nexperia specification. The profile must comply with IPC-J-STD-020, peak temperature ≤260 °C, and time above 217 °C limited to 60–150 seconds. Wave soldering or hand-soldering risks delamination or internal bond wire failure due to thermal stress.

How does the ±5 % tolerance affect accuracy in a 33 V reference application?

At ±5 %, V_Z ranges from 31.35 V to 34.65 V. For a 33 V reference, this introduces ±1.65 V absolute error - acceptable for supervisory thresholds or coarse analog scaling, but insufficient for precision DAC references where <±0.1 % is required.

Can BZT52H-C33,115 replace BZT52C33 in existing designs?

Yes - both share identical 33 V nominal rating, ±5 % tolerance, SOD123F package, and pinout. The "H" suffix denotes updated revision (Rev. 7, Jan 2023) with non-automotive qualification and revised thermal specs; no electrical or mechanical incompatibility exists for industrial use cases.