Nexperia USA Inc. BZT52H-B22,115

Overview

BZT52H-B22,115 from Nexperia is a ±2 % tolerance Zener diode in SOD123F package, rated for 22 V nominal breakdown voltage at I_Z = 5 mA, with 830 mW total power dissipation and 220 Ω maximum differential resistance - used for precision voltage regulation and reference in low-power analog circuits.

For engineers reviewing the BZT52H-B22,115 datasheet, BZT52H-B22,115 pinout, BZT52H-B22,115 application, or BZT52H-B22,115 equivalent, this page delivers verified Zener parameters, thermal behavior, cathode/anode terminal mapping, and direct-fit alternatives for stable 22 V reference design in space-constrained PCB layouts.

Technical Context

This Zener diode operates in reverse-biased avalanche mode to maintain a stable 22 V reference across load variations, with temperature coefficient of +15.4 mV/K (typ.) at I_Z = 5 mA and low 25 μA reverse current at V_R = 17.6 V. Its SOD123F package enables surface-mount integration with 150 K/W junction-to-solder-point thermal resistance.

Designed for DC voltage clamping and shunt regulation, it supports continuous forward conduction up to 250 mA and withstands non-repetitive peak reverse surges of 1.25 A (100 μs), making it suitable for transient-suppressed bias networks and feedback references in linear regulators.

Key Specifications

Pinout & Package

SOD123F is a 2-lead surface-mount plastic package with 1.2 mm height, 3.5 mm length, and 1.7 mm width; cathode marked by a bar on the device body.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZT52H-B22,115, BZT52C22,115 trades tighter tolerance for broader availability and lower cost, while MMSZ5248B-7-F sacrifices power headroom and thermal robustness for second-source flexibility - neither offers the same combination of ±2 % accuracy, 830 mW rating, and 70 K/W R_th(j-sp).

Availability

BZT52H-B22,115 is available at Aetrix Electronics and suitable for industrial sensor interfaces, programmable logic controller (PLC) analog input modules, and embedded power management systems requiring stable component supply and long-term production continuity.

Supply support for BZT52H-B22,115 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, with leadership in automotive-qualified and industrial-grade components.

The BZT52H series belongs to Nexperia's general-purpose Zener diode product line, engineered specifically for stable voltage reference and clamping in cost-sensitive, space-constrained consumer and industrial electronics.

FAQ

What is the maximum continuous reverse current this Zener can handle at 22 V?

The BZT52H-B22,115 does not specify a maximum continuous reverse current independent of power dissipation. At 22 V, its absolute maximum continuous Zener current is derived from P_tot = 830 mW, yielding I_Z(max) ≈ 37.7 mA (830 mW ÷ 22 V). Operation above this level risks thermal runaway unless board-level heatsinking is implemented.

Does the SOD123F package support hand soldering or only reflow?

Nexperia specifies reflow soldering as the only recommended method for SOD123F packages. Hand soldering is not advised due to thermal stress risks: the small thermal mass and close anode/cathode spacing make localized overheating likely, potentially degrading Zener characteristics or delaminating the mold compound. Reflow profile must follow JEDEC J-STD-020 guidelines.

How does the +15.4 mV/K temperature coefficient affect regulation stability?

A +15.4 mV/K temperature coefficient means V_Z increases by approximately 15.4 mV per 1 °C rise in junction temperature. Over a 100 °C range (25 °C to 125 °C), this produces ~1.54 V drift - critical in precision references. Designers mitigate this by limiting power dissipation, using thermal vias under the cathode pad, or selecting higher-V_Z parts with lower coefficients (e.g., >5.6 V types).

Can this Zener be used in series for higher voltage references?

Yes - multiple BZT52H-B22,115 diodes may be connected in series to achieve higher reference voltages (e.g., two in series yield ~44 V), but tolerance and temperature coefficient errors accumulate. For example, ±2 % on each yields ±4 % total error, and combined SZ values sum linearly. Series use also demands matched current sharing; a single current-limiting resistor is acceptable only if all diodes share identical thermal environment.