Diodes Incorporated BZT52HC10WF-7

Overview

BZT52HC10WF-7 from Diodes Incorporated is a surface-mount 10 V Zener diode in SOD123F package, rated for 375 mW power dissipation on standard FR-4 PCB and 830 mW with enhanced thermal pad, with 9.4–10.6 V zener voltage tolerance at 5 mA test current, ±0.2 µA max reverse leakage at 7 V, and 90 pF capacitance at 1 MHz - used for precision voltage regulation and overvoltage protection in automotive sensor interfaces.

For engineers reviewing the BZT52HC10WF-7 datasheet, BZT52HC10WF-7 pinout, BZT52HC10WF-7 application, or BZT52HC10WF-7 equivalent, key selection criteria include zener voltage tolerance (±6%), low dynamic impedance (10 Ω at 5 mA), AEC-Q101 qualification, cathode-band polarity marking, and thermal performance under pulsed vs. steady-state conditions.

Technical Context

This Zener diode operates in reverse breakdown mode to maintain stable reference voltage across load variations and supply fluctuations. Its 10 V nominal zener voltage exhibits +4.5 to +8.0 mV/°C temperature coefficient, enabling predictable drift compensation in temperature-sensitive circuits.

The device uses a planar epitaxial construction with matte tin–annealed copper alloy leadframe, delivering 0.9 V forward voltage at 10 mA and supporting 250 mA peak forward current. It achieves 150 °C/W junction-to-ambient thermal resistance when mounted with a 1 cm² cathode pad, critical for automotive under-hood reliability.

Key Specifications

Pinout & Package

Package: SOD123F (Type B), flat-lead, low-profile surface-mount case with molded green compound (UL 94V-0), cathode identified by band marking. Weight: 0.015 g.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MMSZ5240B-TP and BZX84-C10, BZT52HC10WF-7 uniquely combines AEC-Q101 qualification, 830 mW thermal capability with cathode-pad mounting, and tight 9.4–10.6 V tolerance - making it optimal for automotive systems requiring both reliability and power margin.

Availability

BZT52HC10WF-7 is available at Aetrix Electronics and suitable for automotive engine control units, industrial programmable logic controllers, and medical infusion pump power monitoring requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for BZT52HC10WF-7 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

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability components for automotive, industrial, and consumer markets since 1960.

The BZT52HC series targets AEC-Q101-compliant Zener regulation in space-constrained, thermally demanding environments - designed specifically for automotive sensor interfaces and industrial control systems needing precise, stable voltage references.

FAQ

What is the maximum continuous reverse voltage this Zener can withstand without breakdown?

The BZT52HC10WF-7 has a nominal zener voltage of 9.4–10.6 V at 5 mA test current. Its reverse breakdown is specified at that range; operation below 9.4 V maintains high impedance (>100 MΩ). Applying >10.6 V continuously exceeds specification and risks parametric shift or degradation, especially above 125°C ambient.

Does this part support reflow soldering per JEDEC J-STD-020?

Yes - the SOD123F package is rated for moisture sensitivity level 1 per J-STD-020, meaning it may be stored indefinitely at ≤30°C/60% RH and subjected to standard Pb-free reflow profiles (peak 260°C, 20–40 sec above 217°C) without baking or special handling.

How does thermal derating work for this Zener on a standard FR-4 PCB?

At 25°C ambient, full 375 mW dissipation is allowed. Derating begins linearly at 150 °C/W slope: power must reduce by 1.13 mW/°C above 25°C. At 100°C ambient, maximum allowable power drops to 286 mW - calculated as 375 mW − (100 − 25) × 1.13 mW/°C.

Is the cathode band orientation consistent across all SOD123F-packaged Zeners in this series?

Yes - all BZT52HCx xWF-7 devices use identical SOD123F (Type B) packaging with cathode identified by a single black band at the top edge in top-view orientation. The band aligns with the cathode terminal per Diodes Incorporated's standardized marking scheme shown in DS36891 Rev. 4-2.