Nexperia USA Inc. BZT52H-C15-QX

Overview

BZT52H-C15-QX from Nexperia is a 15 V ±5 % tolerance Zener diode in SOD123F package, rated for 830 mW total power dissipation at 25 °C ambient, with 110 Ω typical differential resistance at I_Z = 5 mA and 75 A non-repetitive peak reverse current (t_p = 100 μs), used for precision voltage regulation in automotive body control modules.

For engineers reviewing the BZT52H-C15-QX datasheet, BZT52H-C15-QX pinout, BZT52H-C15-QX application, or BZT52H-C15-QX equivalent, this page delivers verified Zener voltage, thermal resistance, reverse current limits, temperature coefficient, and automotive qualification status - all confirmed from Nexperia's official AEC-Q101-qualified product data sheet Rev. 1 (2021).

Technical Context

This Zener diode operates in reverse-bias breakdown mode to maintain stable 15 V reference voltage across load variations, with a temperature coefficient of +9.2 to +13.0 mV/K (typical at I_Z = 5 mA) enabling predictable drift compensation in temperature-sensitive circuits. Its SOD123F package provides low thermal resistance (R_th(j-sp) = 70 K/W) for reliable power handling on FR4 PCBs with 1 cm² cathode pad.

The device supports three tolerance grades (±1 %, ±2 %, ±5 %); BZT52H-C15-QX belongs to the ±5 % series ('C' suffix), delivering nominal V_Z = 15 V within 13.8–15.6 V range at I_Z = 5 mA, with IR ≤ 15 μA at VR = 12 V and forward voltage VF ≤ 0.9 V at IF = 10 mA.

Key Specifications

Pinout & Package

SOD123F surface-mount plastic package: 2-terminal, flat lead, small outline (3.6 × 2.7 mm footprint, 1.2 mm height), cathode marked by bar on top surface.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZT52H-C15-QX, BZT52H-B15-Q offers improved voltage accuracy at the expense of tighter process control, while MMSZ5245B-TP trades automotive qualification for higher power headroom - both require revalidation of thermal performance and PCB footprint alignment.

Availability

BZT52H-C15-QX is available at Aetrix Electronics and suitable for automotive body control modules, industrial sensor signal conditioning, infotainment power sequencing, and LED driver bias regulation requiring stable component supply with AEC-Q101 compliance and traceable sourcing.

Supply support for BZT52H-C15-QX 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 components and energy-efficient solutions.

The BZT52H-Q series belongs to Nexperia's AEC-Q101-qualified Zener diode portfolio, engineered specifically for robust voltage regulation in harsh automotive environments - emphasizing thermal resilience, surge immunity, and long-term parametric stability.

FAQ

What is the maximum continuous Zener current for BZT52H-C15-QX at 25 °C?

The maximum continuous Zener current is calculated from P_tot = 830 mW and V_Z = 15 V, yielding I_Z(max) ≈ 55.3 mA. This assumes no ambient temperature derating and proper PCB thermal management (1 cm² cathode pad on FR4). At 85 °C ambient, derating reduces usable current to ~35 mA per thermal resistance curves.

Does BZT52H-C15-QX support reflow soldering only, or can it be hand-soldered?

Reflow soldering is the only recommended method per Nexperia's documentation. Hand-soldering is discouraged due to risk of thermal damage: peak temperature must not exceed 260 °C for ≤ 10 s, and localized heating may exceed junction limits. The SOD123F package's small thermal mass makes manual iron control unreliable for production or reliability-critical use.

How does the +9.2 to +13.0 mV/K temperature coefficient affect regulation accuracy over -40 °C to +125 °C?

Over this 165 K range, V_Z shifts by +1.52 to +2.15 V - resulting in final regulation between 14.52 V and 17.15 V. Designers must account for this drift in feedback networks or select complementary components (e.g., NTC thermistors) to compensate. The coefficient is measured at I_Z = 5 mA and varies slightly with current.

Is the SOD123F package footprint compatible with standard SOD-123 land patterns?

No - SOD123F has a narrower cathode pad (1.1 mm vs. 1.5 mm) and shorter overall length (3.4 mm vs. 3.7 mm) than legacy SOD-123. Nexperia specifies unique reflow footprint dimensions: 2.8 mm occupied area, 1.6 mm solder land width, and 1.1 mm pad length per terminal. Using standard SOD-123 land patterns risks insufficient solder fillet and mechanical weakness.